CN104122470A - Method for determining looped operation of power distribution network - Google Patents
Method for determining looped operation of power distribution network Download PDFInfo
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- CN104122470A CN104122470A CN201410362518.XA CN201410362518A CN104122470A CN 104122470 A CN104122470 A CN 104122470A CN 201410362518 A CN201410362518 A CN 201410362518A CN 104122470 A CN104122470 A CN 104122470A
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Abstract
The invention discloses a method for determining looped operation of a power distribution network. By means of switch position information and node dimension which serves as a breakthrough point, looped network operation of the power distribution network can be rapidly and reliably determined, operation risks of the power distribution network can be reduced, and the management difficulty of the operation of the power distribution network can be lowered; the operation of the power distribution network in the looped network mode can be accurately determined; existing technology conditions can be excellently utilized, and the method is easy to implement. The method for determining looped operation of the power distribution network has the advantages that the method is simple, the operation is convenient, and the current blank of methods for automatically determining whether the operation of the power distribution network is in the looped mode or not can be compensated.
Description
Technical field
The invention belongs to technical field of power systems, relate in particular to a kind of method that judges the operation of power distribution network ring-type.
Background technology
Power distribution network, as mains supply terminal, is to contact part the most closely with power consumer.At present, domestic power distribution network moves with radial or " handing in hand " mode.The radial single power supply mode that operates to, transformer station is radial " tree root ", power consumer is " leaf "; The method of operation of " handing in hand " is dual power supply mode, and first and last end power supply can be also two different transformer stations for two buses of same transformer station.Two kinds of methods of operation are acyclic network operation mode.Power distribution network operation with closed ring can produce circulation scheduling and grid stability are caused to adverse effect in distribution, and the harm such as expansion that more easily cause the accident of the earth short circuit current of operation with closed ring.Therefore, power distribution network only in the time carrying out Loop Closing Operation with closed-loop fashion short-time duty, after grid switching operation, recover immediately open loop situations.Still a kind of method that does not have at present automatic discrimination power distribution network whether to move with ring-type.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of method that judges the operation of power distribution network ring-type, and being intended to solve does not still have a kind of automatic discrimination power distribution network at present whether with the problem of ring-type operation method.
The embodiment of the present invention is achieved in that a kind of method that judges the operation of power distribution network ring-type, and the method for this judgement power distribution network ring-type operation comprises the following steps:
Step 1, reads in method of operation information and position of the switch information, deposits all switching informations of each region transformer station in sequence A;
Step 2, generating structure sequence B, whether decision node number is not less than 2, finishes judgement if nodes is less than 2; If nodes is not less than 2; Calculate each node dimension;
Step 3, has judged whether 1 dimension node, if there is no 1 dimension node, is to have occurred looped network, finishes judgement; If there is 1 dimension node, 1 dimension node put into queue Q
1;
Step 4, will with Q
i-1the 2 dimension nodes that middle node is connected are put into Q
i, i=2; By Q
imiddle node is put into Q
1, judged whether and Q
ithe connected 2 dimension nodes of middle node, if exist and Q
imiddle node be connected 2 dimension nodes ,+1, return by with Q
i-1the 2 dimension nodes that middle node is connected are put into Q
i; If do not exist and Q
imiddle node be connected 2 dimension nodes, carry out height next step;
Step 5, will with Q
ibe associated another node on limit of middle node is put into queue P
1, judge P
1in whether contain 1 dimension node, if there is not 1 dimension node, there is looped network, finish judgement; If occur 1 dimension node, delete Q in B
1middle node and corresponding limit, return to step 2.
Further, reading in method of operation information and position of the switch information is that actual electric network information is converted into the easy-to-handle network topological information of computing machine; Topology information mainly contains node and branch's composition.
Further, position of the switch information is obtained by remote measurement, finally uploads among dispatching system D5000 via workstation, power distribution automation substation, power distribution automation main website.
The method of judgement power distribution network ring-type operation provided by the invention, utilizes position of the switch information, taking node dimension as breakthrough point, can judge fast, reliably the operation of power distribution network looped network; The short-circuit current that can avoid the operation of power distribution network ring-type to produce increases the accident expanded range causing, the ill effect that causality loss expands, and has reduced the risk of power distribution network operation; The circulation that can avoid the operation of power distribution network ring-type to produce, has reduced power distribution network running wastage, saves the energy, has improved economic benefit, has reduced the management difficulty of power distribution network operation; The power distribution network that can correctly judge moves in looped network mode; Well utilize prior art condition, be easy to realize.Method of the present invention is simple, easy to operate, has made up and still there is no a kind of automatic discrimination power distribution network at present whether with the blank of ring-type operation method.
Brief description of the drawings
Fig. 1 is the method flow diagram of the judgement power distribution network ring-type operation that provides of the embodiment of the present invention;
Fig. 2 is the particular flow sheet of the embodiment of the method for the judgement power distribution network ring-type operation that provides of the embodiment of the present invention;
Fig. 3 is the position of the switch data flow figure that the embodiment of the present invention provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
As shown in Figure 1, the method for the judgement power distribution network ring-type of embodiment of the present invention operation comprises the following steps:
S101: read in method of operation information and position of the switch information, deposit all switching informations of each region transformer station in sequence A;
S102: generating structure sequence B, whether decision node number is not less than 2, finishes judgement if nodes is less than 2; If nodes is not less than 2; Calculate each node dimension;
S103: having judged whether 1 dimension node, if there is no 1 dimension node, is to have occurred looped network, finishes judgement; If there is 1 dimension node, 1 dimension node put into queue Q
1;
S104: will with Q
i-1the 2 dimension nodes that middle node is connected are put into Q
i, i=2; By Q
imiddle node is put into Q
1, judged whether and Q
ithe connected 2 dimension nodes of middle node, if exist and Q
imiddle node be connected 2 dimension nodes ,+1, return by with Q
i-1the 2 dimension nodes that middle node is connected are put into Q
i; If do not exist and Q
imiddle node be connected 2 dimension nodes, carry out height next step;
S105: will with Q
ibe associated another node on limit of middle node is put into queue P
1, judge P
1in whether contain 1 dimension node, if there is not 1 dimension node, there is looped network, finish judgement; If occur 1 dimension node, delete Q in B
1middle node and corresponding limit, return to step S102;
What A adopted is queue structure, and what wherein first memory location stored is parent node numbering, and what the second memory location stored is this node on off state, the 0 disconnected position of representative, and 1 represents co-bit; The all child nodes of this node number that store storage method is the same successively;
Principle of work of the present invention: power distribution network is made up of relevant devices such as distribution line and switch, back brakes.What affect power system operating mode only has circuit and on off state, and circuit can be changed hardly from building up after putting into operation, and what therefore affect network running mode only has this factor of the position of the switch.No matter switchtype and model, in the time that switch is closed power by mains side flow into, load side flows out, this switch links together inlet wire and outlet, the dimension of this switching node is 2; In the time that switch disconnects, inlet wire and outlet disconnect, and this node dimension is 1; In the time that electrical network moves with ring-type, on ring, all position of the switch are co-bit, and the dimension of each switching node is 2; If there is switch to disconnect on looped network, looped network unlinks thereupon, and this switching node dimension becomes 1; Therefore, whether, as long as successively by after in network, 1 dimension node is all eliminated, judging whether to also have 2 dimension nodes to exist to judge has looped network to exist; Method particular flow sheet is as shown in Figure 1:
As shown in fig. 1, if read in method of operation information and actual electric network information is converted into the easy-to-handle network topological information of computing machine by position of the switch information spinner; Topology information mainly contains node and branch's composition, is easy to realize determination methods by program.Sequence A storage be region transformer substation switch information, information format is transformer station numbering and switch number, region transformer station is the power supply point in power distribution network, switch wherein will be served as root node.The data of structure sequence B storage are all branch node information using node in A as root node, and all nodes in B are to be all directly or indirectly connected with respective nodes in A.Sequence B adopts the form storage switch numbering of chained list, and first of chained list is summit switch number, and other are the switch number being connected with this summit.The core of the method is by all 1 dimension node cancellations in topology, if all nodes can cancellation not have looped network, if the 2 dimension nodes that last appearance cannot cancellation must have looped network to exist.
The present invention is according to existing power distribution automation level, and position of the switch information can be obtained by remote measurement, finally uploads among dispatching system D5000 via workstation, power distribution automation substation, power distribution automation main website.Concrete position of the switch information data acquiring way as shown in Figure 3.
The present invention's power distribution network that can correctly judge moves in looped network mode; Utilize position of the switch information, taking node dimension as breakthrough point, can judge fast, reliably the operation of power distribution network looped network, reduce power distribution network operation risk, reduce power distribution network operational management difficulty.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (3)
1. a method that judges the operation of power distribution network ring-type, is characterized in that, the method for this judgement power distribution network ring-type operation comprises the following steps:
Step 1, read in method of operation information and position of the switch information, deposit all switching informations of each region transformer station in storage space A, what A adopted is queue structure, what wherein first memory location stored is parent node numbering, what the second memory location stored is this node on off state, the 0 disconnected position of representative, and 1 represents co-bit; The all child nodes of this node number that store storage method is the same successively;
Step 2, generating structure sequence B, whether decision node number is not less than 2, finishes judgement if nodes is less than 2; If nodes is not less than 2; Adopt the traversal method of breadth First to calculate each node dimension;
Step 3, has judged whether 1 dimension node, if there is no 1 dimension node, is to have occurred looped network operation, finishes judgement; If there is 1 dimension node, 1 dimension node put into storage queue Q
1;
Step 4, will with Q
i-1the 2 dimension nodes that middle node is connected are put into Q
i, i=2; By Q
imiddle node is put into Q
1, judged whether and Q
ithe connected 2 dimension nodes of middle node, if exist and Q
imiddle node be connected 2 dimension nodes ,+1, return by with Q
i-1the 2 dimension nodes that middle node is connected are put into Q
i; If do not exist and Q
ithe connected 2 dimension nodes of middle node, carry out next step;
Step 5, will with Q
ibe associated another node on limit of middle node is put into queue P
1, judge P
1in whether contain 1 dimension node, if there is not 1 dimension node, there is looped network, finish judgement; If occur 1 dimension node, delete Q in B
1middle node and corresponding limit, return to step 2.
2. the method for judgement power distribution network ring-type operation as claimed in claim 1, is characterized in that, reading in method of operation information and position of the switch information is actual electric network information exchange to be crossed to dispatching system be converted into the easy-to-handle network topological information of computing machine; Topology information is made up of node and branch.
3. the method for judgement power distribution network ring-type operation as claimed in claim 1, is characterized in that, position of the switch information is obtained by remote measurement, finally uploads among dispatching system D5000 via workstation, power distribution automation substation, power distribution automation main website.
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| CN201410362518.XA CN104122470B (en) | 2014-07-28 | 2014-07-28 | A kind of method for judging the operation of power distribution network ring-type |
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| CN104122470B CN104122470B (en) | 2017-07-04 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1030185A2 (en) * | 1999-02-15 | 2000-08-23 | Isabellenhütte Heusler GmbH KG | Process and means for monitoring the current in a power distribution network |
| US7308370B2 (en) * | 2005-03-22 | 2007-12-11 | Elster Electricity Llc | Using a fixed network wireless data collection system to improve utility responsiveness to power outages |
| CN103248041A (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | Looped network detection method based on bus depth conflict calculation |
| CN103323688A (en) * | 2012-03-20 | 2013-09-25 | 华北电力科学研究院有限责任公司 | Method and device for estimating harmonic state of electric power system |
| CN203481822U (en) * | 2013-08-25 | 2014-03-12 | 国家电网公司 | Closed loop power supply model of medium voltage 10 kilovolt power distribution network |
-
2014
- 2014-07-28 CN CN201410362518.XA patent/CN104122470B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1030185A2 (en) * | 1999-02-15 | 2000-08-23 | Isabellenhütte Heusler GmbH KG | Process and means for monitoring the current in a power distribution network |
| US7308370B2 (en) * | 2005-03-22 | 2007-12-11 | Elster Electricity Llc | Using a fixed network wireless data collection system to improve utility responsiveness to power outages |
| CN103323688A (en) * | 2012-03-20 | 2013-09-25 | 华北电力科学研究院有限责任公司 | Method and device for estimating harmonic state of electric power system |
| CN103248041A (en) * | 2013-03-29 | 2013-08-14 | 国家电网公司 | Looped network detection method based on bus depth conflict calculation |
| CN203481822U (en) * | 2013-08-25 | 2014-03-12 | 国家电网公司 | Closed loop power supply model of medium voltage 10 kilovolt power distribution network |
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| CN104122470B (en) | 2017-07-04 |
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