CN105305580A

CN105305580A - Motor control system, control method and controller thereof

Info

Publication number: CN105305580A
Application number: CN201510655481.4A
Authority: CN
Inventors: 李俊; 傅立秦; 高乐
Original assignee: Sungrow Power Supply Co Ltd
Current assignee: HEFEI YANGGUANG ELECTRIC POWER TECHNOLOGY Co.,Ltd.
Priority date: 2015-10-09
Filing date: 2015-10-09
Publication date: 2016-02-03
Anticipated expiration: 2035-10-09
Also published as: CN105305580B

Abstract

The invention provides a control method for a motor control system. The control method for the motor control system comprises the steps of when a controller receives an operation instruction and determines a fact that the state of the motor control system is normal, determining whether the operation mode of the motor control system requires switching according to the operation instruction; when the operation mode of the motor control system needs switching, determining a fact that the motor control system requires switching to an independent inverting mode, a driving motor mode or a grid-connected operation mode by the controller according to the operation instruction; and in a corresponding operation mode, through controlling a switch unit and an inverter unit and detecting a corresponding position signal, respectively making the motor control system supply electric power to a motor load or a local load, or be charged through an electric grid, or perform grid connection with the electric grid for selling electric power. The invention provides an integrated solution for charging, grid connection and supplying electric power to the local load.

Description

A kind of electric machine control system and control method thereof and controller

Technical field

The present invention relates to motor control technology field, particularly relate to a kind of electric machine control system and control method thereof and controller.

Background technology

At present, in close relations due to new-energy automobile and electrical network, a large amount of impact of new-energy automobile access network discharge and recharge on electrical network can't neglect.Emerging V2G (VehicletoGrid) technology achieves the two-way interaction of electrical network and vehicle, is the important component part of intelligent power grid technology.The development of V2G technology greatly will affect following electric automobile comercial operation pattern.

Research shows: new-energy automobile synchronously will be in progress with intelligent vehicle and intelligent grid, wherein, external plug-in hybrid electric vehicle (PHEV) and pure electric automobile (EV) can will become the inalienable part of distribution system own, energy storage can not only be provided, balance electrical energy demands, can also keep the stability of electrical network when needing emergency service.

In order to realize above-mentioned functions, the prior art existed at present for realize charge function by charger, and needs to adopt other a set of combining inverter to realize grid-connected function, lacks charging and grid-connected integrated scheme.

Summary of the invention

In view of this, the invention provides a kind of electric machine control system and control method thereof and controller, to solve in prior art the problem lacking charging and grid-connected integrated scheme.

To achieve these goals, the technical scheme that provides of the embodiment of the present invention is as follows:

A kind of control method of electric machine control system, be applied to electric machine control system, described electric machine control system comprises: dispatching management information system, controller, energy-storage units, inversion unit, LC filter and switch element, and described switch element is connected with electrical network, motor load and local load respectively; The control method of described electric machine control system comprises:

Described controller receives operating instruction;

Described controller judges that whether the state of described electric machine control system is normal;

When the state of described electric machine control system is normal, according to described operating instruction, described controller judges that the operational mode of described electric machine control system is the need of switching;

When the operational mode of described electric machine control system needs to switch, according to described operating instruction, described controller judges that described electric machine control system needs to switch to which kind of operational mode;

When described electric machine control system needs to switch to independent inverter mode, described controller controls conducting and the shutoff of described switch element and described inversion unit, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition;

When described electric machine control system needs to switch to drive motors pattern, described controller controls conducting and the shutoff of described switch element and described inversion unit, detect the relevant informations such as the rotating speed of described motor load, torque to be correlated with controlled parameter, controlling described motor load meets preset operating conditions;

When described electric machine control system need to switch to be incorporated into the power networks pattern time, according to described operating instruction, described controller judges that described electric machine control system needs to switch to which kind of grid-connect mode;

When described electric machine control system needs to switch to grid-connected charge mode, described controller controls conducting and the shutoff of described switch element, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition;

When described electric machine control system needs to switch to grid-connected sale of electricity pattern, described controller is according to described operating instruction determination grid-connected current size, control conducting and the shutoff of described switch element and described inversion unit, detect the voltage and current information of described electrical network, the output controlling described electric machine control system meets sale of electricity preset mode.

Preferably, according to described operating instruction, described controller judges that described electric machine control system also comprises after needing to switch to which kind of operational mode:

When described electric machine control system needs to switch to independent inverter mode, described controller judges described local load is as which kind of load;

When described local load is single-phase load, described controller first detects and determines the link position of described single-phase load and described electric machine control system, control the switch conduction be connected with described single-phase load in described switch element, control conducting and the shutoff of described inversion unit again, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition;

When described local load is threephase load, described controller controls the switch conduction be connected with described threephase load in described switch element, control conducting and the shutoff of described inversion unit, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition;

When described electric machine control system needs to switch to drive motors pattern, described controller judges described motor is as which kind of motor;

When described motor is monophase machine, described controller first detects and determines the link position of described monophase machine and described electric machine control system, control the switch conduction be connected with described monophase machine in described switch element, control conducting and the shutoff of described inversion unit again, detect the relevant informations such as the rotating speed of described motor load, torque to be correlated with controlled parameter, controlling described motor load meets preset operating conditions;

When described motor is three phase electric machine, described controller controls the switch conduction be connected with described three phase electric machine in described switch element, control conducting and the shutoff of described inversion unit, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions;

When described electric machine control system needs to switch to grid-connected charge mode, described controller judges described electrical network is as which kind of electrical network;

When described electrical network is single-phase electrical network, described controller first detects and determines the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element again, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition;

When described electrical network is three phase network, described controller controls the switch conduction be connected with described three phase network in described switch element, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition;

When described electric machine control system needs to switch to grid-connected sale of electricity pattern, described controller judges described electrical network is as which kind of electrical network;

When described electrical network is single-phase electrical network, described controller first judges that whether described line voltage is too high;

When described line voltage is too high, described controller controls the switch conduction be connected with described single-phase electrical network in described switch element, the idle half-bridge controlled in described inversion unit enters boost mode, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode;

When described line voltage is normal, described controller detects and determines the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element, control the respective switch pipe conducting in described inversion unit, the idle switching tube controlled in described inversion unit turns off, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode;

When described electrical network is three phase network, described controller controls the switch conduction be connected with described three phase network in described switch element, control described inversion unit and enter inversion grid connection pattern, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode.

When described electric machine control system needs to switch to grid-connected powering mode, described controller controls the switch conduction be connected with described electrical network and described local load in described switch element.

A kind of controller of electric machine control system, be applied to electric machine control system, described electric machine control system comprises: dispatching management information system, controller, energy-storage units, inversion unit, LC filter and switch element, and described switch element is connected with electrical network, motor load and local load respectively; The controller of described electric machine control system comprises:

Receiver module, for receiving operating instruction;

Whether judge module is normal for judging the state of described electric machine control system; When the state of described electric machine control system is normal, judge that the operational mode of described electric machine control system is the need of switching according to described operating instruction; When the operational mode of described electric machine control system needs to switch, judge that described electric machine control system needs to switch to which kind of operational mode according to described operating instruction; When described electric machine control system need to switch to be incorporated into the power networks pattern time, judge that described electric machine control system needs to switch to which kind of grid-connect mode according to described operating instruction;

Control module, for when described electric machine control system needs to switch to independent inverter mode, control conducting and the shutoff of described switch element and described inversion unit, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition; When described electric machine control system needs to switch to drive motors pattern, control conducting and the shutoff of described switch element and described inversion unit, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions; When described electric machine control system needs to switch to grid-connected charge mode, control conducting and the shutoff of described switch element, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, according to described operating instruction determination grid-connected current size, control conducting and the shutoff of described switch element and described inversion unit, detect the voltage and current information of described electrical network, the output controlling described electric machine control system meets sale of electricity preset mode.

Preferably, described judge module also for: when described electric machine control system needs to switch to independent inverter mode, judge described local load is as which kind of load; When described electric machine control system needs to switch to drive motors pattern, judge described motor is as which kind of motor; When described electric machine control system needs to switch to grid-connected charge mode, judge described electrical network is as which kind of electrical network; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, described controller judges described electrical network is as which kind of electrical network;

Described control module also for: when described local load is single-phase load, first detect and determine the link position of described single-phase load and described electric machine control system, control the switch conduction be connected with described single-phase load in described switch element, control conducting and the shutoff of described inversion unit again, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition; When described local load is threephase load, control the switch conduction be connected with described threephase load in described switch element, control conducting and the shutoff of described inversion unit, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition; When described motor is monophase machine, first detect and determine the link position of described monophase machine and described electric machine control system, control the switch conduction be connected with described monophase machine in described switch element, control conducting and the shutoff of described inversion unit again, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions; When described motor is three phase electric machine, control the switch conduction be connected with described three phase electric machine in described switch element, control conducting and the shutoff of described inversion unit, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions; When described electric machine control system needs to switch to grid-connected charge mode, and described electrical network is when being single-phase electrical network, first detect and determine the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element again, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition; When described electric machine control system needs to switch to grid-connected charge mode, and described electrical network is when being three phase network, control the switch conduction be connected with described three phase network in described switch element, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, and when described electrical network is single-phase electrical network, first judge that whether described line voltage is too high; When described line voltage is too high, control the switch conduction be connected with described single-phase electrical network in described switch element, the idle half-bridge controlled in described inversion unit enters boost mode, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode; When described line voltage is normal, detect and determine the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element, control the respective switch pipe conducting in described inversion unit, the idle switching tube controlled in described inversion unit turns off, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, and described electrical network is when being three phase network, control the switch conduction be connected with described three phase network in described switch element, control described inversion unit and enter inversion grid connection pattern, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode.

Preferably, described control module also for: when described electric machine control system needs to switch to grid-connected powering mode, control the switch conduction be connected with described electrical network and described local load in described switch element.

A kind of electric machine control system, is connected with electrical network, motor load and local load; Described electric machine control system comprises: dispatching management information system, energy-storage units, inversion unit, LC filter, switch element and controller as described above; Wherein:

Described dispatching management information system is connected with described energy-storage units and described controller respectively;

Described energy-storage units is connected with described LC filter by described inversion unit;

Described LC filter is connected with described electrical network, described motor load and described local load by described switch element;

Described controller is connected with described inversion unit, described LC filter, described switch element, described electrical network and described motor load respectively.

Preferably, described inversion unit comprises: the first electric capacity, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube; Described first switching tube, described second switch pipe, described 3rd switching tube, described 4th switching tube, described 5th switching tube and described 6th switching tube include body diode or equal reverse parallel connection diode; Wherein:

The first end of one end of described first electric capacity, the first end of described first switching tube, described 3rd switching tube and the first end of described 5th switching tube are connected, and tie point is connected with one end of described energy-storage units;

Second end of described first switching tube is connected with the first end of described second switch pipe, and tie point is the first output of described inversion unit;

Second end of described 3rd switching tube is connected with the first end of described 4th switching tube, and tie point is the second output of described inversion unit;

Second end of described 5th switching tube is connected with the first end of described 6th switching tube, and tie point is the 3rd output of described inversion unit;

Second end of the other end of described first electric capacity, the second end of described second switch pipe, described 4th switching tube and the second end of described 6th switching tube are connected, and tie point is connected with the other end of described energy-storage units;

The control end of described first switching tube, described second switch pipe, described 3rd switching tube, described 4th switching tube, described 5th switching tube and described 6th switching tube is connected with described controller respectively.

Preferably, when described electrical network is three phase network, described local load is threephase load, when described motor load is three phase electric machine, described switch element comprises: the first switch, second switch, the 3rd switch, the 4th switch, the 5th switch, the 6th switch, the 7th switch, the 8th switch, the 9th switch and three inductance; Wherein:

One end of one end of described first switch, one end of described 4th switch and described 7th switch is connected, and tie point is connected with the first output of described LC filter;

One end of one end of described second switch, one end of described 5th switch and described 8th switch is connected, and tie point is connected with the second output of described LC filter;

One end of one end of described 3rd switch, one end of described 6th switch and described 9th switch is connected, and tie point is connected with the 3rd output of described LC filter;

The other end of the other end of described first switch, the other end of described second switch and described 3rd switch is all connected with described threephase load;

The other end of the other end of described 4th switch, the other end of described 5th switch and described 6th switch is connected with described three phase network each via an inductance;

The other end of the other end of described 7th switch, the other end of described 8th switch and described 9th switch is all connected with described three phase electric machine;

The control end of described first switch, described second switch, described 3rd switch, described 4th switch, described 5th switch, described 6th switch, described 7th switch, described 8th switch and described 9th switch is connected with described controller respectively.

Preferably, when described electrical network comprises single-phase electrical network and three phase network, described local load comprises single-phase load and threephase load, when described motor load comprises monophase machine and three phase electric machine, described second switch is also connected with the two ends of described single-phase load with the tie point of described threephase load respectively with described 3rd switch; Described 5th switch is also connected with the two ends of described single-phase electrical network with the tie point of described three phase network respectively with described 6th switch; Described 7th switch is also connected with the two ends of described monophase machine with the tie point of described three phase electric machine respectively with described 8th switch;

Described inversion unit also comprises: the 11 switch, twelvemo pass, the 13 switch, the second electric capacity and the 3rd inductance; Wherein:

Described 11 switch is connected between the first end of described first electric capacity and described first switching tube;

Described twelvemo is closed and described first paralleled power switches;

One end of described 13 switch is connected with the first end of described first switching tube;

The other end of described 13 switch is connected with the second end of described second switch pipe by described second electric capacity;

Described 3rd inductance and described first paralleled power switches.

Preferably, described energy-storage units comprises: the first energy storage device, the second energy storage device, the 3rd electric capacity, the 4th electric capacity, the 7th switching tube, the 8th switching tube, the 9th switching tube and the tenth switching tube; Described 7th switching tube, described 8th switching tube, described 9th switching tube and described tenth switching tube include body diode or equal reverse parallel connection diode; Wherein:

The positive pole of one end of described 3rd electric capacity, the first end of described 7th switching tube and described first energy storage device is connected;

The negative pole of the other end of described 3rd electric capacity, the second end of described 8th switching tube and described first energy storage device is connected;

The positive pole of one end of described 4th electric capacity, the first end of described 9th switching tube and described second energy storage device is connected; Second end of described 9th switching tube is connected with the second end of described 7th switching tube, and tie point is an output of described energy-storage units;

The negative pole of the other end of described 4th electric capacity, the second end of described tenth switching tube and described second energy storage device is connected; The first end of described tenth switching tube is connected with the first end of described 8th switching tube, and tie point is another output of described energy-storage units.The application provides a kind of control method of electric machine control system, receives operating instruction and when judging that the state of described electric machine control system is normal, will judge that the operational mode of described electric machine control system is the need of switching according to described operating instruction when controller; When the operational mode of described electric machine control system needs to switch, according to described operating instruction, described controller judges that described electric machine control system needs to switch to independent inverter mode, drive motors pattern is still incorporated into the power networks pattern again; And under corresponding operational mode, by the control to switch element and inversion unit, and the detection to relevant position signal, controlling described electric machine control system is respectively motor load or local load supplying, or charged by electrical network, carry out grid-connected sale of electricity again or to described electrical network, provide a kind of charging, grid-connected and to the integrated scheme of local load supplying.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.

The control method flow chart of a kind of electric machine control system that Fig. 1 provides for the embodiment of the present application;

The control method flow chart of another electric machine control system that Fig. 2 provides for another embodiment of the application;

The controller architecture schematic diagram of a kind of electric machine control system that Fig. 3 provides for another embodiment of the application;

A kind of electric machine control system structural representation that Fig. 4 provides for another embodiment of the application;

Another electric machine control system circuit diagram that Fig. 5 provides for another embodiment of the application;

Another electric machine control system circuit diagram that Fig. 6 provides for another embodiment of the application;

Another electric machine control system circuit diagram that Fig. 7 provides for another embodiment of the application.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

In view of this, the invention provides a kind of control method of electric machine control system, to solve in prior art the problem lacking charging and grid-connected integrated scheme.

Concrete, the control method of described electric machine control system, be applied to electric machine control system, described electric machine control system comprises: dispatching management information system, controller, energy-storage units, inversion unit, LC filter and switch element, and described switch element is connected with electrical network, motor load and local load respectively; The control method of described electric machine control system as shown in Figure 1, comprising:

S101, described controller receive operating instruction;

Concrete, described operating instruction can derive from operating personnel, dispatching management information system or dispatching of power netwoks aspect, is not specifically limited herein.

S102, described controller judge that whether the state of described electric machine control system is normal;

S103, when the state of described electric machine control system is normal, according to described operating instruction, described controller judges that the operational mode of described electric machine control system is the need of switching;

When described controller judges state normal (unfaulty conditions) of described electric machine control system, judge whether to carry out operational mode switching, if do not need, keep proterotype to run.

S104, when the operational mode of described electric machine control system need switch time, according to described operating instruction, described controller judges that described electric machine control system needs to switch to which kind of operational mode;

If desired carry out operational mode switching, according to described operating instruction, described controller judges that described electric machine control system needs to switch to which kind of operational mode after, control corresponding switch conduction in described switch element.

S105, when described electric machine control system needs to switch to independent inverter mode, described controller controls conducting and the shutoff of described switch element and described inversion unit, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition;

Concrete, if desired independent inverter mode (being described for three-phase) is switched to, described controller detects the input current (i.e. in the inductive bank of described LC filter electric current) of described LC filter, and the output voltage of the electric current of described local load and described LC filter (i.e. in the capacitance group of described LC filter voltage), and adopt the input current inner ring of described LC filter, the double-loop control strategy of the output voltage outer ring of described LC filter, if system needs dynamic characteristic higher, the current feed-forward of described local load can be adopted to add above-mentioned double-loop control strategy to realize, the output voltage controlling described LC filter meets presets output condition.Described default output condition can be determined according to concrete applied environment, is not specifically limited herein.

S106, when described electric machine control system needs to switch to drive motors pattern, described controller controls conducting and the shutoff of described switch element and described inversion unit, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions;

If described controller needs to drive described motor load, then can according to the Electric Machine Control index in described preset operating conditions, detect the relevant controlled parameter (as electric current, rotating speed and torque etc.) of described motor load, actuating motor control algolithm, controls described relevant controlled parameter and reaches requirement.

S107, when described electric machine control system need to switch to be incorporated into the power networks pattern time, according to described operating instruction, described controller judges that described electric machine control system needs to switch to which kind of grid-connect mode;

If described controller needs to be incorporated into the power networks, the described operating instruction of described controller received energy management system and dispatching of power netwoks, judge that described electric machine control system needs to switch to charging or discharge mode according to described operating instruction.

S108, when described electric machine control system needs to switch to grid-connected charge mode, described controller controls conducting and the shutoff of described switch element, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition;

If desired charge mode is switched to, described controller controls described inversion unit and charges to described energy-storage units with PWM rectifier system, and the state information detecting described energy-storage units is (as voltage and current, namely electric current in the inductive bank in described inversion unit) and electrical network relevant information (as voltage), the output current of inversion unit as described in controlling according to the charge rule of described energy-storage units (as storage battery) and voltage, and then control described energy-storage units and meet preset charged condition; General also employing energy-storage units current inner loop and energy-storage units voltage two close cycles pattern, carry out current-limiting charge by energy-storage units electric current.

S109, when described electric machine control system needs to switch to grid-connected sale of electricity pattern, described controller is according to described operating instruction determination grid-connected current size, control conducting and the shutoff of described switch element and described inversion unit, detect the voltage and current information of described electrical network, the output controlling described electric machine control system meets sale of electricity preset mode.

If desired discharge mode is switched to, then need the described operating instruction determination grid-connected current size sent according to dispatching of power netwoks and described dispatching management information system, described controller detects the voltage of described electrical network, control described electric machine control system output (as described in electric current phase-amplitude on inductive bank Lm1 in LC filter).

The above-mentioned various control algolithm that described controller adopts, eventually through output PWM switching waveform, controls conducting and the shutoff of each switching tube in described inversion unit, realizes different transformation of electrical energies.

The control method of the described electric machine control system that the present embodiment provides, receive operating instruction when described controller and when judging that the state of described electric machine control system is normal, will judge that according to described operating instruction the operational mode of described electric machine control system is the need of switching; When the operational mode of described electric machine control system needs to switch, according to described operating instruction, described controller judges that described electric machine control system needs to switch to independent inverter mode, drive motors pattern is still incorporated into the power networks pattern again; And under corresponding operational mode, by the control to described switch element and described inversion unit, and the detection to relevant position signal, controlling described electric machine control system is respectively described motor load or described local load supplying, or charged by described electrical network, carry out grid-connected sale of electricity again or to described electrical network, the control method of described electric machine control system provide not only a kind of charging and grid-connected integrated scheme, also incorporates the function to local load supplying simultaneously.

What deserves to be explained is, the described electric machine control system of the control method application of described electric machine control system, by increasing described LC filter, described LC filter and grid-connected reactor is utilized to form LCL topology, the grid-connected output current characteristic of described electric machine control system can be improved, effectively improve the grid-connected current quality of power supply, improve the Electro Magnetic Compatibility of described controller.

Preferably, as shown in Figure 2, also comprise after step S104:

S201, when described electric machine control system needs to switch to independent inverter mode, described controller judges described local load is as which kind of load;

When described local load is single-phase load, execution step S202, described controller first detect and determine the link position of described single-phase load and described electric machine control system, control the switch conduction be connected with described single-phase load in described switch element, control conducting and the shutoff of described inversion unit again, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition;

When described local load is threephase load, perform step S105;

S203, when described electric machine control system needs to switch to drive motors pattern, described controller judges described motor is as which kind of motor;

When described motor is monophase machine, execution step S204, described controller first detect and determine the link position of described monophase machine and described electric machine control system, control the switch conduction be connected with described monophase machine in described switch element, control conducting and the shutoff of described inversion unit again, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions;

When described motor is three phase electric machine, perform step S106;

S205, when described electric machine control system needs to switch to grid-connected charge mode, described controller judges described electrical network is as which kind of electrical network;

When described electrical network is single-phase electrical network, execution step S206, described controller first detect and determine the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element again, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition;

When described electrical network is three phase network, perform step S108;

S207, when described electric machine control system needs to switch to grid-connected sale of electricity pattern, described controller judges described electrical network is as which kind of electrical network;

When described electrical network is single-phase electrical network, execution step S208, described controller first judge that whether described line voltage is too high;

When described line voltage is too high, execution step S209, described controller control the switch conduction be connected with described single-phase electrical network in described switch element, the idle half-bridge controlled in described inversion unit enters boost mode, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode;

When described line voltage is normal, execution step S210, described controller detect and determine the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element, control the respective switch pipe conducting in described inversion unit, the idle switching tube controlled in described inversion unit turns off, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode;

When described electrical network is three phase network, perform step S109.

In concrete practical application, described electrical network may be single-phase electrical network or three phase network, described local load may be single-phase load or threephase load, described motor load may be monophase machine or three phase electric machine, now described controller needs the described electrical network be connected to described electric machine control system, described motor load and described local load to judge, and controls according to corresponding judged result.

Concrete, when described electric machine control system is connected with single-phase load, then first determine the interfaces that described single-phase load connects, open corresponding brachium pontis switching tube in described inversion unit, close idle brachium pontis, method is multiplied to obtain set-point with given voltage peak to single-phase independent inverter voltage given employing standard sine wave, appoints the control strategy adopting the dicyclo described in above-described embodiment or dicyclo loading current feed-forward.

Wherein the changing method of above-mentioned single-phase load is taked in the control of monophase machine equally.

When described electric machine control system needs single-phase grid-connected, first determine single-phase electricity grid connect mode, detection of grid phase place, control corresponding brachium pontis switching tube in described inversion unit and open, close idle brachium pontis, realize single-phase grid-connected operation.

The control method of the described electric machine control system shown in Fig. 2, can be applicable to single-phase and three-phase applications occasion, be more conducive to the popularization of described electric machine control system.

It is pointed out that between each switch in described switch element it is not strict mutex relation, as also can, certain time, by the corresponding switch that closes, made described electrical network be described local load supplying.

Another embodiment of the present invention additionally provides a kind of controller of electric machine control system, as shown in Figure 3, be applied to electric machine control system, described electric machine control system comprises: dispatching management information system, controller, energy-storage units, inversion unit, LC filter and switch element, and described switch element is connected with electrical network, motor load and local load respectively; The controller of described electric machine control system comprises:

Receiver module 101, for receiving operating instruction;

Whether judge module 102 is normal for judging the state of described electric machine control system; When the state of described electric machine control system is normal, judge that the operational mode of described electric machine control system is the need of switching according to described operating instruction; When the operational mode of described electric machine control system needs to switch, judge that described electric machine control system needs to switch to which kind of operational mode according to described operating instruction; When described electric machine control system need to switch to be incorporated into the power networks pattern time, judge that described electric machine control system needs to switch to which kind of grid-connect mode according to described operating instruction;

Control module 103, for when described electric machine control system needs to switch to independent inverter mode, control conducting and the shutoff of described switch element and described inversion unit, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition; When described electric machine control system needs to switch to drive motors pattern, control conducting and the shutoff of described switch element and described inversion unit, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions; When described electric machine control system needs to switch to grid-connected charge mode, control conducting and the shutoff of described switch element, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, according to described operating instruction determination grid-connected current size, control conducting and the shutoff of described switch element and described inversion unit, detect the voltage and current information of described electrical network, the output controlling described electric machine control system meets sale of electricity preset mode.

Preferably, judge module 102 also for: when described electric machine control system needs to switch to independent inverter mode, judge described local load is as which kind of load; When described electric machine control system needs to switch to drive motors pattern, judge described motor is as which kind of motor; When described electric machine control system needs to switch to grid-connected charge mode, judge described electrical network is as which kind of electrical network; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, described controller judges described electrical network is as which kind of electrical network;

Control module 103 also for: when described local load is single-phase load, first detect and determine the link position of described single-phase load and described electric machine control system, control the switch conduction be connected with described single-phase load in described switch element, control conducting and the shutoff of described inversion unit again, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition; When described local load is threephase load, control the switch conduction be connected with described threephase load in described switch element, control conducting and the shutoff of described inversion unit, detect the electric current of described local load and the input current of described LC filter and output voltage, the output voltage controlling described LC filter meets presets output condition; When described motor is monophase machine, first detect and determine the link position of described monophase machine and described electric machine control system, control the switch conduction be connected with described monophase machine in described switch element, control conducting and the shutoff of described inversion unit again, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions; When described motor is three phase electric machine, control the switch conduction be connected with described three phase electric machine in described switch element, control conducting and the shutoff of described inversion unit, detect the relevant controlled parameter of described motor load, control described motor load and meet preset operating conditions; When described electric machine control system needs to switch to grid-connected charge mode, and described electrical network is when being single-phase electrical network, first detect and determine the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element again, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition; When described electric machine control system needs to switch to grid-connected charge mode, and described electrical network is when being three phase network, control the switch conduction be connected with described three phase network in described switch element, and control described inversion unit and charge to described energy-storage units with PWM rectifier system, detect the voltage of described electrical network and the state information of described energy-storage units, communicate with described dispatching management information system, control described energy-storage units and meet preset charged condition; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, and when described electrical network is single-phase electrical network, first judge that whether described line voltage is too high; When described line voltage is too high, control the switch conduction be connected with described single-phase electrical network in described switch element, the idle half-bridge controlled in described inversion unit enters boost mode, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode; When described line voltage is normal, detect and determine the link position of described single-phase electrical network and described electric machine control system, control the switch conduction be connected with described single-phase electrical network in described switch element, control the respective switch pipe conducting in described inversion unit, the idle switching tube controlled in described inversion unit turns off, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, and described electrical network is when being three phase network, control the switch conduction be connected with described three phase network in described switch element, control described inversion unit and enter inversion grid connection pattern, detect the voltage and current information of described electrical network again, the output controlling described electric machine control system meets sale of electricity preset mode.

Concrete operation principle is same as the previously described embodiments, repeats no more herein.

Another embodiment of the present invention additionally provides a kind of electric machine control system, as shown in Figure 4, is connected with electrical network, motor load and local load; Described electric machine control system comprises: dispatching management information system 201, energy-storage units 202, inversion unit 203, LC filter 204, switch element 205 and controller 206; Wherein:

Dispatching management information system 201 is connected with energy-storage units 202 and controller 206 respectively;

Energy-storage units 202 is connected with LC filter 204 by inversion unit 203;

LC filter 204 is connected with described electrical network, described motor load and described local load by switch element 205;

Controller 206 is connected with inversion unit 203, LC filter 204, switch element 205, described electrical network and described motor load respectively.

Preferably, as shown in Figure 5, inversion unit 203 comprises: the first electric capacity C1, the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4, the 5th switching tube Q5 and the 6th switching tube Q6; First switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4, the 5th switching tube Q5 and the 6th switching tube Q6 include body diode or equal reverse parallel connection diode; Wherein:

One end of first electric capacity C1, the first end of the first switching tube Q1, the first end of the 3rd switching tube Q3 and the first end of the 5th switching tube Q5 are connected, and tie point is connected with one end of energy-storage units 202;

Second end of the first switching tube Q1 is connected with the first end of second switch pipe Q2, and tie point is the first output of inversion unit 203;

Second end of the 3rd switching tube Q3 is connected with the first end of the 4th switching tube Q4, and tie point is the second output of inversion unit 203;

Second end of the 5th switching tube Q5 is connected with the first end of the 6th switching tube Q6, and tie point is the 3rd output of inversion unit 203;

The other end of the first electric capacity C1, second end of second switch pipe Q2, second end of the 4th switching tube Q4 and second end of the 6th switching tube Q6 are connected, and tie point is connected with the other end of energy-storage units 202;

The control end of the first switching tube Q1, second switch pipe Q2, the 3rd switching tube Q3, the 4th switching tube Q4, the 5th switching tube Q5 and the 6th switching tube Q6 is connected with controller 206 respectively.

Preferably, as shown in Figure 5, switch element 205 comprises: the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 5th switch S 5, the 6th switch S 6, the 7th switch S 7, the 8th switch S 8, the 9th switch S 9 and three inductance; Wherein:

One end of one end of first switch S 1, one end of the 4th switch S 4 and the 7th switch S 7 is connected, and tie point is connected with the first output of LC filter 204;

One end of one end of second switch S2, one end of the 5th switch S 5 and the 8th switch S 8 is connected, and tie point is connected with the second output of LC filter 204;

One end of one end of 3rd switch S 3, one end of the 6th switch S 6 and the 9th switch S 9 is connected, and tie point is connected with the 3rd output of LC filter 204;

The other end of the other end of the first switch S 1, the other end of second switch S2 and the 3rd switch S 3 is all connected with described threephase load;

The other end of the other end of the 4th switch S 4, the other end of the 5th switch S 5 and the 6th switch S 6 is connected with described three phase network each via an inductance;

The other end of the other end of the 7th switch S 7, the other end of the 8th switch S 8 and the 9th switch S 9 is all connected with described three phase electric machine;

The control end of the first switch S 1, second switch S2, the 3rd switch S 3, the 4th switch S 4, the 5th switch S 5, the 6th switch S 6, the 7th switch S 7, the 8th switch S 8 and the 9th switch S 9 is connected with controller 206 respectively.

What deserves to be explained is, described electric machine control system, by increasing LC filter 204, LC filter 204 and grid-connected reactor (three inductance in switch element 205) is utilized to form LCL topology, the grid-connected output current characteristic of described electric machine control system can be improved, effectively improve the grid-connected current quality of power supply, improve the Electro Magnetic Compatibility of described controller.

Preferably, as shown in Figure 6, when described electrical network comprises single-phase electrical network and three phase network, described local load comprises single-phase load and threephase load, when described motor load comprises monophase machine and three phase electric machine, second switch S2 is also connected with the two ends of described single-phase load with the tie point of described threephase load respectively with the 3rd switch S 3; 5th switch S 5 is also connected with the two ends of described single-phase electrical network with the tie point of described three phase network respectively with the 6th switch S 6; 7th switch S 7 is also connected with the two ends of described monophase machine with the tie point of described three phase electric machine respectively with the 8th switch S 8;

Inversion unit 203 also comprises: the 11 switch S 11, twelvemo close S12, the 13 switch S 13, second electric capacity C2 and the 3rd inductance L 3; Wherein:

11 switch S 11 is connected between the first end of the first electric capacity C1 and the first switching tube Q1;

It is in parallel with the first switching tube Q1 that twelvemo closes S12;

One end of 13 switch S 13 is connected with the first end of the first switching tube Q1;

The other end of the 13 switch S 13 is connected with second end of second switch pipe Q2 by the second electric capacity C2;

3rd inductance L 3 is in parallel with the first switching tube Q1.

As shown in Figure 6, when described controller band single-phase load, the pair of switches pipe in idle inversion unit 203, if the voltage of energy-storage units 202 does not meet corresponding service conditions, or can be replaced by the energy storage device of other voltage range in some occasion.Now the 11 switch S 11 is switched to the 3rd inductance L 3 place branch road, closes the 13 switch S 13 of the second electric capacity C2 place branch road, disconnects twelvemo pass S12.11 switch S 11, the tenth Three S's 13 and the first switching tube Q1 and second switch pipe Q2 form bidirectional DC/DC converter, provide wider voltage range to the switching tube of six in inversion unit 203.It should be noted that, six switching tubes in inversion unit 203 are 6 way switch pipes, but not integrated device.

Preferably, as shown in Figure 7, energy-storage units 202 comprises: the first energy storage device 221, second energy storage device 222, the 3rd electric capacity C3, the 4th electric capacity C4, the 7th switching tube Q7, the 8th switching tube Q8, the 9th switching tube Q9 and the tenth switching tube Q10; 7th switching tube Q7, the 8th switching tube Q8, the 9th switching tube Q9 and the tenth switching tube Q10 include body diode or equal reverse parallel connection diode; Wherein:

The positive pole of one end of the 3rd electric capacity C3, the first end of the 7th switching tube Q7 and described first energy storage device is connected;

The negative pole of the other end of the 3rd electric capacity C3, second end of the 8th switching tube Q8 and described first energy storage device is connected;

The positive pole of one end of the 4th electric capacity C4, the first end of the 9th switching tube Q9 and described second energy storage device is connected; Second end of the 9th switching tube Q9 is connected with second end of the 7th switching tube Q7, and tie point is an output of energy-storage units 202;

The negative pole of the other end of the 4th electric capacity C4, second end of the tenth switching tube Q10 and described second energy storage device is connected; The first end of the tenth switching tube Q10 is connected with the first end of the 8th switching tube Q8, and tie point is another output of energy-storage units 202.

As shown in Figure 7, for the situation of the DC source that multiple different energy storage device accesses as controller 206, multiple switching tube (the 7th switching tube Q7, the 8th switching tube Q8, the 9th switching tube Q9 and the tenth switching tube Q10) is adopted to manage the discharge and recharge of corresponding energy storage device.Particular modulation method can be adopted during electric discharge, distribute the discharge time of two energy storage devices, can common-mode voltage be suppressed.If distribute discharging current according to current residual electric energy, also can reasonable employment two energy storage devices.

In the present invention, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.

Below be only the preferred embodiment of the present invention, those skilled in the art understood or realizes the present invention.To be apparent to one skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims

1. the control method of an electric machine control system, it is characterized in that, be applied to electric machine control system, described electric machine control system comprises: dispatching management information system, controller, energy-storage units, inversion unit, LC filter and switch element, and described switch element is connected with electrical network, motor load and local load respectively; The control method of described electric machine control system comprises:

Described controller receives operating instruction;

2. the control method of electric machine control system according to claim 1, is characterized in that, according to described operating instruction, described controller judges that described electric machine control system also comprises after needing to switch to which kind of operational mode:

3. the control method of electric machine control system according to claim 1, is characterized in that, according to described operating instruction, described controller judges that described electric machine control system also comprises after needing to switch to which kind of operational mode:

4. the controller of an electric machine control system, it is characterized in that, be applied to electric machine control system, described electric machine control system comprises: dispatching management information system, controller, energy-storage units, inversion unit, LC filter and switch element, and described switch element is connected with electrical network, motor load and local load respectively; The controller of described electric machine control system comprises:

Receiver module, for receiving operating instruction;

5. the controller of electric machine control system according to claim 4, is characterized in that, described judge module also for: when described electric machine control system needs to switch to independent inverter mode, judge described local load is as which kind of load; When described electric machine control system needs to switch to drive motors pattern, judge described motor is as which kind of motor; When described electric machine control system needs to switch to grid-connected charge mode, judge described electrical network is as which kind of electrical network; When described electric machine control system needs to switch to grid-connected sale of electricity pattern, described controller judges described electrical network is as which kind of electrical network;

6. the controller of electric machine control system according to claim 4, it is characterized in that, described control module also for: when described electric machine control system needs to switch to grid-connected powering mode, control the switch conduction be connected with described electrical network and described local load in described switch element.

7. an electric machine control system, is characterized in that, is connected with electrical network, motor load and local load; Described electric machine control system comprises: dispatching management information system, energy-storage units, inversion unit, LC filter, switch element and the controller as described in claim 3 or 4; Wherein:

8. electric machine control system according to claim 7, it is characterized in that, described inversion unit comprises: the first electric capacity, the first switching tube, second switch pipe, the 3rd switching tube, the 4th switching tube, the 5th switching tube and the 6th switching tube; Described first switching tube, described second switch pipe, described 3rd switching tube, described 4th switching tube, described 5th switching tube and described 6th switching tube include body diode or equal reverse parallel connection diode; Wherein:

9. electric machine control system according to claim 7, it is characterized in that, when described electrical network is three phase network, described local load is threephase load, when described motor load is three phase electric machine, described switch element comprises: the first switch, second switch, the 3rd switch, the 4th switch, the 5th switch, the 6th switch, the 7th switch, the 8th switch, the 9th switch and three inductance; Wherein:

10. electric machine control system according to claim 9, it is characterized in that, when described electrical network comprises single-phase electrical network and three phase network, described local load comprises single-phase load and threephase load, when described motor load comprises monophase machine and three phase electric machine, described second switch is also connected with the two ends of described single-phase load with the tie point of described threephase load respectively with described 3rd switch; Described 5th switch is also connected with the two ends of described single-phase electrical network with the tie point of described three phase network respectively with described 6th switch; Described 7th switch is also connected with the two ends of described monophase machine with the tie point of described three phase electric machine respectively with described 8th switch;

Described twelvemo is closed and described first paralleled power switches;

Described 3rd inductance and described first paralleled power switches.

11. electric machine control systems according to claim 7, it is characterized in that, described energy-storage units comprises: the first energy storage device, the second energy storage device, the 3rd electric capacity, the 4th electric capacity, the 7th switching tube, the 8th switching tube, the 9th switching tube and the tenth switching tube; Described 7th switching tube, described 8th switching tube, described 9th switching tube and described tenth switching tube include body diode or equal reverse parallel connection diode; Wherein:

The negative pole of the other end of described 4th electric capacity, the second end of described tenth switching tube and described second energy storage device is connected; The first end of described tenth switching tube is connected with the first end of described 8th switching tube, and tie point is another output of described energy-storage units.