WO2008128487A1 - Editor for producing a composite function for an electrical measurement or protective device - Google Patents
Editor for producing a composite function for an electrical measurement or protective device Download PDFInfo
- Publication number
- WO2008128487A1 WO2008128487A1 PCT/DE2007/000722 DE2007000722W WO2008128487A1 WO 2008128487 A1 WO2008128487 A1 WO 2008128487A1 DE 2007000722 W DE2007000722 W DE 2007000722W WO 2008128487 A1 WO2008128487 A1 WO 2008128487A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- protective device
- editor
- function
- measuring
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/056—Programming the PLC
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13107—Logic symbols, plan LOP, functional block symbols FBS, functional programming FUP
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/13—Plc programming
- G05B2219/13144—GUI graphical user interface, icon, function bloc editor, OI operator interface
Definitions
- the invention relates to an editor for generating a composite function for an electrical measuring or protective device, which comprises a library of function blocks representing basic functions, wherein the function blocks comprise at least one data input and one data output, and a work surface on the selected function blocks with each other via their data inputs and data outputs are connectable, thereby generating a composite function consisting of at least two function blocks linked together.
- Electrical measuring or protective devices are used for monitoring and operating electrical energy supply networks. Electrical gauges take measurements describing the state of an electric power supply network, e.g.
- Current and / or voltage measurements can be stored by the measuring devices or transmitted to other devices, eg a central computer in a control room of an electrical energy supply network.
- Some meters also have data processing processors that calculate measurement data derived from the acquired measurements, such as active or reactive power, impedance, or rms value. Such derived measurement data can in turn be stored or transmitted.
- some measuring devices are set up for acquiring current vector measurements and / or voltage vector measured values, ie they measure both amplitude and phase position of the respective currents and / or voltages and provide these for example. As complex numbers. Such measuring devices are also referred to as Phasor Measurement Units (PMU).
- PMU Phasor Measurement Units
- Electrical protective devices independently monitor electrical energy supply networks for impermissible operating states, such as a short circuit.
- the electrical protection devices via current and / or voltage measuring inputs, record measured values which are proportional to currents and voltages in the electrical power supply network and evaluate these using predetermined protection algorithms in order to detect whether the electrical energy supply network is in a permissible or an impermissible operating state is. If an impermissible operating state is detected, the faulty section of the electrical energy supply network is automatically disconnected from the remaining electrical power supply network by opening corresponding circuit breakers.
- the electrical protection devices generate so-called trip commands, which are transmitted to the respectively open circuit breaker and cause them to open their electrical contacts and thus to interrupt the flow of current in the faulty portion of the electrical energy supply network.
- an electrical protection device for protecting an electrical power supply line may be equipped with a distance protection algorithm which calculates an impedance value of the monitored electrical line based on current and voltage measurements and makes a decision on the basis of the calculated impedance value as to whether the electrical energy supply line is within a permissible limit or an inadmissible operating condition.
- a distance protection algorithm which calculates an impedance value of the monitored electrical line based on current and voltage measurements and makes a decision on the basis of the calculated impedance value as to whether the electrical energy supply line is within a permissible limit or an inadmissible operating condition.
- Output of a function block for detecting a current measurement value can be connected to an input of a function block for comparing the measured current value with a certain current threshold.
- the object of the present invention is to make an editor of the known type such that it can be used particularly advantageously in connection with electrical protection devices for the protection of a large-area distributed power supply network.
- the invention provides that the library has at least one extended function block, which comprises a data input for data generated in the electrical measuring or protective device and a data input for data generated outside of the electrical measuring or protective device.
- the invention is based on the finding that, in the case of large-area electrical power supply networks, monitoring usually takes place with a plurality of measuring or protective devices remote from one another.
- frequently data, such as measured values or values derived therefrom, of the local protection device must be linked to data of a remote protection device, for example in order to make a decision as to whether an inadmissible operating state of the electrical energy supply network exists.
- a remote protection device for example in order to make a decision as to whether an inadmissible operating state of the electrical energy supply network exists.
- the invention comes in and proposes to include in the library of an editor for generating a user-specific function for an electrical measuring or protective device, an extended functional module, the at least one data input for within the electrical measuring or Protective device (locally) generated data and another data input for outside of the electrical measuring or protective device (remotely) generated data includes.
- data generated within the electrical measuring or protective device should be understood to mean data which has been generated by the means of the electrical measuring or protective device, such as current or voltage converters, analog / digital converters and possibly data processing processors (that is to say, measured values, for example) , Pointer readings, as well as values derived from measured values, such as rms values, averages, messages and alarms) while data generated outside of the electrical measuring or protective device should be understood to mean data which is from a remote device, preferably a remote measuring or protective device, generated and transmitted in a suitable manner to the local measuring or protective device.
- a remote device preferably a remote measuring or protective device, generated and transmitted in a suitable manner to the local measuring or protective device.
- composite functions can be generated as user-specific functions which permit a combination of data from different measuring or protective devices in a local measuring or protective device, whereas such a link has hitherto only been outside the respective electrical measuring or protective devices could be made with a separate evaluation data processing device, such as a computer in a control center of the electrical energy supply network.
- the at least one extended function block comprises a synchronization unit which provides a temporal assignment of the data generated in the electrical measuring or protective device to those outside the electrical measuring or protection device. or protection device generated data that have been generated simultaneously to the data generated in the electrical measuring or protective device. In fact, it is often necessary to carry out a temporally precise assignment between the data generated locally and that generated outside the electrical measuring or protective device in order to achieve correct results when performing the composite function.
- a composite function is designed so that a locally measured current measured value is compared with a remotely detected current measured value, it must be ensured that the two current readings compared with one another have been recorded at the same time in the respective measuring or protective device to be able to make a correct statement from the comparison of the two current measured values.
- the synchronization unit is set up to carry out the temporal assignment on the basis of time stamps which are respectively assigned to the data generated in the electrical measuring or protective device and the data generated outside the electrical measuring or protective device.
- time stamps which are respectively assigned to the data generated in the electrical measuring or protective device and the data generated outside the electrical measuring or protective device.
- an accurate time stamp can be assigned to the respective measured value.
- the synchronization unit of the extended function block then ensures that only those measured values of a local and a remote measuring or protective device are processed with the same time stamp.
- a time stamp can be generated, for example, by means of an internal timer in the respective measuring or protective device, which is synchronized via an external absolute timer, for example a GPS signal.
- the at least one extended function block has a computing unit which is set up for the mathematical processing of the data received at the data inputs of the extended function block. This allows any mathematical operations to be performed on the received data.
- a further advantageous embodiment of the inventive editor provides that it has a conversion device which is set up for converting the composite function into a program code that can be processed by the electrical measuring or protective device.
- a conversion device which is set up for converting the composite function into a program code that can be processed by the electrical measuring or protective device.
- an electrical measuring or protective device is not able to directly interpret and execute the composite function generated by the editor.
- the composite function in one of the electrical measuring or To translate the protection device interpretable program code, which is transmitted to the electrical measuring or protective device and executed there.
- a further advantageous embodiment of the inventive editor further provides that the editor as a program on a data processing device, such. a personal computer, having an interface for transmitting the composite function or a derived from the composite function program code to the electrical measuring or protective device.
- a data processing device such as a personal computer or a laptop and does not need to be run as a stand-alone program on the electrical measurement or protection device, which usually has to do with comparatively little memory and processing power.
- Figure 1 is a schematic representation of a portion of an electrical energy supply network with electrical measuring or protective devices
- FIG. 2 shows a system for generating a user-specific function for an electrical measuring or protective device
- FIG. 1 shows a schematic view of a part 10 of an electrical energy supply network.
- current and / or voltage transformer devices At measuring points IIa, IIb and IIc, current and / or voltage transformer devices, measuring or protective devices 12a, 12b and 12c, which are not shown in detail, are connected to the part 10 of the electrical power supply network.
- the illustration in FIG. 1 is limited to a single-phase representation, it will usually be the case that the part 10 of the electrical energy supply network is designed to be multiphase (eg three-phase), each phase being connected to a measuring point IIa, IIb and IIc is connected to the measuring or protective devices 12a, 12b and 12c. These measuring or protective devices 12a, 12b and 12c are then set up in accordance with the processing of measured values of several phases.
- multiphase eg three-phase
- the measuring or protective devices 12a, 12b, 12c receive measured values, such as, for example, current and voltage values from the electrical energy supply network.
- the measured values may be current and voltage vector measured values, which are represented, for example, in complex form and provide information about the amplitude and phase position of the respective measured value.
- the individual measuring or protective devices 12a, 12b, 12c can transmit the measured values taken by them or values derived therefrom - collectively referred to as "data" - to the other measuring or protective devices 12a, 12b, 12c so that each measurement or protection device 12a, 12b, 12c can access its own data and the transmitted data of the other measurement or protection devices 12a, 12b, 12c.
- the data are provided with a time stamp during their generation in the respective measuring or protective device 12a, 12b, 12c, for example with the accuracy of one microsecond assigns to each reading a time value indicative of the time of its acquisition.
- these measuring or protective devices 12a, 12b, 12c receive a time signal from a common external timer, for example a GPS satellite 14.
- the GPS satellite 14 sends impulses which contain a time signal from the measuring or protection guiders 12a, 12b, 12c by means of GPS antennas 15a, 15b, 15c and internal or external GPS receivers at intervals of one second each (not shown in detail in FIG. 1) and used to synchronize the internal timers of the measuring or protective devices 12a, 12b, 12c. This ensures that all measuring or protective devices 12a, 12b, 12c operate their internal timers in a time-synchronized manner.
- various types of monitoring functions for the part 10 of the electrical energy supply network can be achieved.
- current and voltage vectors recorded at the same measuring points in each case can be compared with one another in order to represent power flows in the electrical energy supply network and to detect any possible power fluctuations.
- a current differential protection function can be achieved by comparing current vector measured values acquired at the same measuring time points with one another, wherein the direction of the flowing current is taken into account by assigning the correct sign.
- Electrical measuring or protective devices usually have basic functions already implemented by the manufacturer, which the operator of such a measuring or protective device can select when ordering the measuring or protection device. Frequently, however, the operator of the electrical measuring or protective device also wants to implement certain user-specific functions in the electrical measuring or protective device. This can be achieved with some measurement or protection devices via an editor, which allows the creation of composite functions in a text-based or graphical manner. This is shown by way of example in FIG.
- FIG. 2 shows an electrical measuring or protective device 20 in which a user-specific function is to be implemented.
- an external data processing device 21 for example a personal computer or laptop
- a program with an editor for creating the user-specific function runs.
- the running editor on the data processing device 21 is symbolized by a program window 22.
- a composite function for the measuring or protective device 20 can be generated. This composite function is created by means of the editor by linking text or graphics blocks in a user-friendly manner. Thereafter, by means of a converter present in the editor, the composite radio generated in the manner tion converted into a program code that can be processed by the measuring or protective device 20.
- This program code is transmitted from the data processing device 21 to the measuring or protective device 20 via a communication link 23 to be temporarily set up.
- This communication connection 23 may be, for example, a wired serial communication connection, a USB communication connection or a wireless communication connection, for example via the WLAN standard or Bluetooth.
- Protective device 20 has been transmitted, it can be integrated there in the device control software and executed.
- FIG. 3 shows an exemplary embodiment of a program window 30 with a work surface 31 and a library surface 32.
- Function blocks 33 representing basic functions representing a basic function of the library are displayed on the library surface.
- Suchgnacsbl ⁇ cke contain simple basic functions from which a composite function can be constructed.
- the function blocks in the library may be configured to perform simple basic mathematical functions such as addition, subtraction, multiplication or division.
- threshold blocks, message output blocks, time delay blocks, and blocks for generating random numbers may be present in the library.
- the function blocks 33 From the function blocks 33 present in the library, the user can select individual function blocks and transfer a copy of them to the work surface 31.
- the function blocks 33 have data inputs 34 and data outputs 35, via which they can be interconnected with other function blocks.
- arrows 36 may serve as logical links between the individual function blocks.
- a simple differential protection function has been created as a composite function on the work surface 31.
- a first functional block 37a detects current vector measured values of a local protection device.
- Another function block 37b acquires current counter readings of a remote protection device.
- the current sense readings of the local protection device and the current sense readings of the remote protection device are transmitted to an extended functional block 37c having a first data input 38a for detecting local data and a second data input 38b for detecting remotely generated data.
- the current counter readings acquired with the function blocks 37a and 37b have timestamps assigned to them, which can be evaluated by the extended function block 37c.
- the extended function block 37c reads out the information from the respective time stamps and makes an assignment of those current vector measured values that have been recorded at the same time in the local protection device and in the remote protection device and therefore have identical time stamps.
- the extended function block 37c has a computing device which is set up to process complex numbers.
- the resulting difference value is output at a data output 38c of the extended function block 37c. It is fed to a data input of a subsequent function block 37d, which performs a threshold comparison and determines the difference. compares the reference value with a preset threshold. This threshold value can be specified by means of the editor as a parameter of the function block 37d.
- the result of the threshold value comparison ie a statement as to whether the difference value lies below or above the predetermined threshold value, is output on the output side of the threshold value block 37d and fed on the input side to a function block 37e carrying out an alarm function.
- Function block 37e for example, generates an optical or acoustic error message if a violation of the threshold has been detected in function block 37d.
- the function block 37e can fall back on device functions of the protective device on which the composite function is executed and, for example, drive a software driver for activating an alarm light signal (for example in the form of a flashing light-emitting diode).
- the function block 37e can also be connected to a trip function (switch triggering function) of the electrical protection device, so that a signal for opening a circuit breaker connected to the electrical protection device is automatically output when there is a threshold violation.
- a trip function switch triggering function
- Another possibility is to have an electronic alarm message generated by the function block 37e in the form of a data telegram and to be transmitted to a superordinate location, for example a network control center.
- the composite function generated on the editor's workspace 31, which contains at least one extended function block 37c that can handle both locally generated and remotely generated data and ensures the time synchronicity of the acquired data, provides the user of an electrical measurement or protection device an advanced way to create composite functions, since the user is not on the processing locally generated Data is limited, but can also integrate remotely generated data.
- the user has the ability to process complex numbers, allowing him to use more accurate pointer readings than scalar RMS or Means.
- the composite function is converted into a program code understandable by the measuring or protective device by means of a converter and transferred to a data memory of the measuring or protective device in order to be integrated into the device software.
- the electrical measuring or protective device can perform the composite function (together with the other device functions).
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112007003541T DE112007003541A5 (en) | 2007-04-18 | 2007-04-18 | Editor for creating a composite function for an electrical measuring or protective device |
PCT/DE2007/000722 WO2008128487A1 (en) | 2007-04-18 | 2007-04-18 | Editor for producing a composite function for an electrical measurement or protective device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/DE2007/000722 WO2008128487A1 (en) | 2007-04-18 | 2007-04-18 | Editor for producing a composite function for an electrical measurement or protective device |
Publications (1)
Publication Number | Publication Date |
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WO2008128487A1 true WO2008128487A1 (en) | 2008-10-30 |
Family
ID=38691999
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2007/000722 WO2008128487A1 (en) | 2007-04-18 | 2007-04-18 | Editor for producing a composite function for an electrical measurement or protective device |
Country Status (2)
Country | Link |
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DE (1) | DE112007003541A5 (en) |
WO (1) | WO2008128487A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5841654A (en) * | 1995-10-16 | 1998-11-24 | Smar Research Corporation | Windows based network configuration and control method for a digital control system |
US6088665A (en) * | 1997-11-03 | 2000-07-11 | Fisher Controls International, Inc. | Schematic generator for use in a process control network having distributed control functions |
US20060259231A1 (en) * | 2005-05-13 | 2006-11-16 | Denso Corporation | Distributed control system |
-
2007
- 2007-04-18 DE DE112007003541T patent/DE112007003541A5/en not_active Withdrawn
- 2007-04-18 WO PCT/DE2007/000722 patent/WO2008128487A1/en active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5841654A (en) * | 1995-10-16 | 1998-11-24 | Smar Research Corporation | Windows based network configuration and control method for a digital control system |
US6088665A (en) * | 1997-11-03 | 2000-07-11 | Fisher Controls International, Inc. | Schematic generator for use in a process control network having distributed control functions |
US20060259231A1 (en) * | 2005-05-13 | 2006-11-16 | Denso Corporation | Distributed control system |
Non-Patent Citations (2)
Title |
---|
"Case Studies for SIPROTEC Protection Relays and Power Quality", SIEMENS AG, POWER TRANSMISSION AND DISTRIBUTION, 2005, Nürnberg, XP002459702, Retrieved from the Internet <URL:http://www.belenergo.by/protect/Zashita/Obshaya%20Info/SIPROTEC%20primeri%20ispol'zovaniya%20en.pdf> [retrieved on 20071123] * |
"Continuous Function Chart CFC - Linking and parameter assignment instead of programming", SIEMENS AG, AUTOMATION AND DRIVES, October 2003 (2003-10-01), Nürnberg, XP002459703, Retrieved from the Internet <URL:http://www1.siemens.cz/ad/current/content/data_files/automatizacni_systemy/prumyslovy_software/cfc/prbrief_simatic_soft_cfc_10_2003_en.pdf> [retrieved on 20071123] * |
Also Published As
Publication number | Publication date |
---|---|
DE112007003541A5 (en) | 2010-04-01 |
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