CN105353267A - Detection method of restorable loads of distribution network in fault - Google Patents
Detection method of restorable loads of distribution network in fault Download PDFInfo
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- CN105353267A CN105353267A CN201510638046.0A CN201510638046A CN105353267A CN 105353267 A CN105353267 A CN 105353267A CN 201510638046 A CN201510638046 A CN 201510638046A CN 105353267 A CN105353267 A CN 105353267A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The present invention relates to a detection method of restorable loads of a distribution network in fault, belonging to the field of analysis and optimization of an electric power system. The detection method provided by the invention comprises: a non-fault node of a fault isolating switch is taken as a vertex to perform a breadth-first topology search and form power-lossing topology islands; and the breadth-first topology search is performed based on a non-charged side node of a switch which has only one charged end until a leaf node or a critical node with the power-lossing topology islands are found, and it is determined the power restoration of the power-lossing topology islands may be realized. All the load capable of restoring electricity islands are counted and are form a union for construction of restorable loads of the distribution network in fault; and all the load incapable of restoring electricity islands are taken as non-restorable loads of the distribution network in fault. According to the detection method of restorable loads of a distribution network in fault, power-lossing areas may be formed through quick division and may be divided into restorable power-lossing areas and non-restorable power-lossing areas so that operators are convenient to take actions at the first time to restore power supply of the restorable power-lossing areas and find weak links of the power grid to perform reconstruction.
Description
Technical field
The invention belongs to Power System Analysis optimisation technique field, particularly a kind of distribution network failure can recover load testing method.
Background technology
After fault, fast quick-recovery dead electricity load is one of important indicator evaluating distribution network reliability and service quality.To the further analysis of dead electricity load, can judge which dead electricity load possesses the possibility restored electricity on the one hand, which dead electricity load cannot restore electricity under existing power system operating mode, thus finds the weak link of power distribution network, for distribution transformation, method of operation adjustment provide reference; Recovering control problem itself is on the other hand a MINLP model problem, calculates, can increase the weight of computation burden, even affect the solvability of problem if all include all dead electricity loads in Restoration model.
The basic condition of current power distribution network is also poor, and automatization level is low, dispatches compared to supermatic power transmission network, and the power distribution network in quite a lot of area is still in the state of blind tune, blind pipe, and a lot of decision-making still depends on artificial experience.Break down after causing power failure, which load dead electricity can be judged at the most, and cannot segment load.The way to manage of such extensive style cannot meet the demand of the power supply reliability day by day improved.The restorability analysis of the power distribution network dead electricity load therefore after fault, has larger economical, societal benefits.
Depth-first search and BFS (Breadth First Search) are that two kinds of topology search modes comparatively common in electric system are (about the detailed introduction of the way of search of depth-first and breadth First, can see " graph theory ", Dystel work, Yu Qinglin etc. translate, Higher Education Publishing House, 4th edition), internal memory shared by depth-first is few, in the power transmission network electric system research in those early years generation, because the hardware resource such as internal memory of computing machine is quite limited, therefore the way of search of depth-first is usually adopted, and the computer hardware level of today has improved greatly, breadth First and depth-first in electric system, all obtain more application.The goal in research of power transmission network normally has the seldom electrical island be closely connected, and the research of power distribution network take then feeder line as base unit, usually comprises tens, hundreds of, even several thousand feeder lines.Adopt the method for operation of breadth First and power distribution network to have natural consistance, therefore in power distribution network, the topology search of breadth First is more common.
Summary of the invention
The object of the invention is for solving the problem, propose a kind of distribution network failure and can recover load testing method, the method can divide formation dead electricity district by fast, dead electricity zoning can be divided into again and can recover dead electricity district and irrecoverable dead electricity district, be convenient to the power supply that operations staff takes measures to recover to recover dead electricity district the very first time, grasp fault long period that may cause restores electricity areas case simultaneously, thus finds the fragile link of electrical network and transformed.
The method comprises the following steps:
1) be empty NULL by the i $ Island setup of attribute of all nodes comprised in power distribution network, topological island belonging to i $ Island attribute representative node, all uncharged for two end nodes fault isolator set is designated as F, and wherein i-th fault isolator is designated as F
i, one end is charged, one end is uncharged and state is the switch set opened is designated as S, wherein a jth switch is designated as S
j;
2) breakdown switch in F is traveled through, by fault isolator F
inon-faulting side gusset Node
i2as summit, carry out the topology search based on breadth First, form dead electricity topology island I
i, the load aggregation of search process is designated as L
i, by I
ithe attribute bRestore that whether can recover be set to false false, dead electricity topology island I
iit is I that interior nodes (node of topology search process) all arranges i $ Island field
i, search cut-off criterion is leaf node (topology search process breaker in middle state get actual on off state) for last node layer, and the dead electricity topology island of formation is gathered and is designated as Island;
3) switch in switch set S is traveled through, by switch S
jtwo ends charged and be not with electrical nodes to be designated as Nodej successively
+, Node
j-, not to be with electrical nodes Node
j-as summit, according to Nodej
+→ Node
j-the topology search of breadth First is carried out in direction (pointing to not charged node direction by band electrical nodes), search cut-off criterion is that the node of the node or last one deck running into i Island non-NULL is leaf node (topology search process breaker in middle state is got closed, namely the virtual condition of switch is ignored), the bRestore attribute of topological island i $ Island belonging to the node of i $ Island non-NULL is set to true true;
4) for the dead electricity topology island I of Island
iif its bRestore attribute is true, then I
ion load for load can be recovered; Otherwise then I
ion load be irrecoverable load; All bRestore attributes are the recovered load of the load union on genuine topological island as the whole network, and all bRestore attributes are the irrecoverable load of the load union on false topological island as the whole network.
Feature of the present invention and beneficial effect;
The inventive method is using the non-faulting node of fault isolator as summit, carry out breadth First topology search, form dead electricity topology island one by one, then the non-band point side gusset based on the switch only having one end charged carries out breadth First topology search, until find leaf node or the critical node with dead electricity topology island, thus judge that this dead electricity topology island can restore electricity.All load statistics recovering electrical island are got union formation distribution network failure and can recover load; The load of all irrecoverable electrical island is as the irrecoverable load of fault.
The method can divide formation dead electricity district by fast, dead electricity zoning can be divided into again and can recover dead electricity district and irrecoverable dead electricity district, be convenient to the power supply that operations staff takes measures to recover to recover dead electricity district the very first time, grasp fault long period that may cause restores electricity areas case simultaneously, thus finds the fragile link of electrical network and transformed.
Accompanying drawing explanation
Fig. 1 is the power distribution network example structure schematic diagram of the inventive method.
Embodiment
A kind of distribution network failure that the present invention proposes can recover load testing method and be described in detail as follows in conjunction with the embodiments:
A kind of distribution network failure that the present invention proposes can recover load testing method, and it is characterized in that, the method comprises the following steps:
1) be empty NULL by the i $ Island setup of attribute of all nodes comprised in power distribution network, topological island belonging to i $ Island attribute representative node, all uncharged for two end nodes fault isolator set is designated as F, and wherein i-th fault isolator is designated as F
i, one end is charged, one end is uncharged and state is the switch set opened is designated as S, wherein a jth switch is designated as S
j;
2) breakdown switch in F is traveled through, by fault isolator F
inon-faulting side gusset Node
i2as summit, carry out the topology search based on breadth First, form dead electricity topology island I
i, the load aggregation of search process is designated as L
i, by I
ithe attribute bRestore that whether can recover be set to false false, dead electricity topology island I
iit is I that interior nodes (node of topology search process) all arranges i $ Island field
i, search cut-off criterion is leaf node (topology search process breaker in middle state get actual on off state) for last node layer, and the dead electricity topology island of formation is gathered and is designated as Island;
3) switch in switch set S is traveled through, by switch S
jtwo ends charged and be not with electrical nodes to be designated as Nodej successively
+, Node
j-, not to be with electrical nodes Node
j-as summit, according to Nodej
+→ Node
j-the topology search of breadth First is carried out in direction (pointing to not charged node direction by band electrical nodes), search cut-off criterion is that the node of the node or last one deck running into i Island non-NULL is leaf node (topology search process breaker in middle state is got closed, namely the virtual condition of switch is ignored), the bRestore attribute of topological island i $ Island belonging to the node of i $ Island non-NULL is set to true true;
4) for the dead electricity topology island I of Island
iif its bRestore attribute is true, then I
ion load for load can be recovered; Otherwise then I
ion load be irrecoverable load; All bRestore attributes are the recovered load of the load union on genuine topological island as the whole network, and all bRestore attributes are the irrecoverable load of the load union on false topological island as the whole network.
Embodiment
The power distribution network example structure of application the inventive method as shown in Figure 1, the present embodiment power distribution network comprises 57 nodes altogether, 1 two-winding transformer, (Filled Rectangle frame representation switch state is for closing for 6 switches, hollow rectangle frame representation switch state is for opening, oval switch is fault isolator), article 51, circuit, each node all hangs with load, 57 nodes have 57 loads, for the sake of clarity, on figure, do not indicate load that node is hung, wherein the load of i-th node claims load i, line name circuit+two ends node represents, such as node 6, line name between 7 is circuit 6-7, circuit 12-13 breaks down.
A kind of distribution network failure that the present invention proposes can recover load testing method, and the method comprises the following steps:
1) be empty NULL by the i $ Island setup of attribute of all nodes comprised in power distribution network, topological island belonging to i $ Island attribute representative node, all uncharged for two end nodes fault isolator set is designated as F, and wherein i-th fault isolator is designated as F
i, one end is charged, one end is uncharged and state is the switch set opened is designated as S, wherein a jth switch is designated as S
j;
In this instance, two end nodes all uncharged fault barrier disconnector set F={ switch 16-17, switch 11-57}, one end is charged, one end is uncharged and state is switch S={ the switch 18-51} opened.
2) breakdown switch in F is traveled through, by fault isolator F
inon-faulting side gusset Node
i2as summit, carry out the topology search based on breadth First, form dead electricity topology island I
i, the load aggregation of search process is designated as L
i, by I
ithe attribute bRestore that whether can recover be set to false false, dead electricity topology island I
iit is I that interior nodes (node of topology search process) all arranges i $ Island field
i, search cut-off criterion is leaf node (topology search process breaker in middle state get actual on off state) for last node layer, and the dead electricity topology island of formation is gathered and is designated as Island;
For switch 16-17, its non-faulting side gusset is node 17; The node of topology search process is as follows:
Ground floor: 17
The second layer: 18
For the third time: 19
4th layer: 20
Layer 5: 21
Layer 6: 22
Layer 7: 23
8th layer: 24
9th layer: 25
Tenth layer: 26 (leaf node)
Topological island belonging to above node is I
1,in FIG shown in oval dotted line frame.
For switch 11-57, its non-faulting side gusset is node 57, and the node of topology search process is as follows:
Ground floor: 57
The second layer: 58 (leaf nodes)
Topological island belonging to above node is I
2, in FIG as shown in rectangular broken line frame.
3) switch in switch set S is traveled through, by switch S
jtwo ends charged and be not with electrical nodes to be designated as Nodej successively
+, Node
j-, not to be with electrical nodes Node
j-as summit, according to Nodej
+→ Node
j-the topology search of breadth First is carried out in direction (pointing to not charged node direction by band electrical nodes), search cut-off criterion is that the node of the node or last one deck running into i Island non-NULL is leaf node (topology search process breaker in middle state is got closed, namely the virtual condition of switch is ignored), the bRestore attribute of topological island i $ Island belonging to the node of i $ Island non-NULL is set to true true;
Be not with electrical nodes to be 18 in switch 18-51, topology search result is as follows:
Ground floor: 18 (i $ Island=I belonging to node
1non-NULL), by I
1bRestore attribute be set to true true.
4) for the dead electricity topology island I of Island
iif its bRestore attribute is true, then I
ion load for load can be recovered; Otherwise then I
ion load be irrecoverable load; All bRestore attributes are the recovered load of the load union on genuine topological island as the whole network, and all bRestore attributes are the irrecoverable load of the load union on false topological island as the whole network.
Topology island I
1on load (load of node 17-node 26 carry) can load be recovered for fault; Topology island I
2on load be that fault can recover load (load of node 57, node 58 carry).
Claims (1)
1. distribution network failure can recover a load testing method, it is characterized in that, the method comprises the following steps:
1) be empty NULL by the i $ Island setup of attribute of all nodes comprised in power distribution network, topological island belonging to i $ Island attribute representative node, all uncharged for two end nodes fault isolator set is designated as F, and wherein i-th fault isolator is designated as F
i, one end is charged, one end is uncharged and state is the switch set opened is designated as S, wherein a jth switch is designated as S
j;
2) breakdown switch in F is traveled through, by fault isolator F
inon-faulting side gusset Node
i2as summit, carry out the topology search based on breadth First, form dead electricity topology island I
i, the load aggregation of search process is designated as L
i, by I
ithe attribute bRestore that whether can recover be set to false false, dead electricity topology island I
iit is I that interior nodes all arranges i $ Island field
i, search cut-off criterion is leaf node for last node layer, and the dead electricity topology island of formation is gathered and is designated as Island;
3) switch in switch set S is traveled through, by switch S
jtwo ends charged and be not with electrical nodes to be designated as Nodej successively
+, Node
j-, not to be with electrical nodes Node
j-as summit, according to Nodej
+→ Node
j-the topology search of breadth First is carried out in direction, search cut-off criterion is that the node of the node or last one deck running into i Island non-NULL is leaf node, and the bRestore attribute of topological island i Island belonging to the node of i Island non-NULL is set to true true;
4) for the dead electricity topology island I of Island
iif its bRestore attribute is true, then I
ion load for load can be recovered; Otherwise then I
ion load be irrecoverable load; All bRestore attributes are the recovered load of the load union on genuine topological island as the whole network, and all bRestore attributes are the irrecoverable load of the load union on false topological island as the whole network.
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| CN201510638046.0A CN105353267B (en) | 2015-09-29 | 2015-09-29 | A kind of distribution network failure can recover load testing method |
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| CN105353267A true CN105353267A (en) | 2016-02-24 |
| CN105353267B CN105353267B (en) | 2018-01-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110943759A (en) * | 2019-11-12 | 2020-03-31 | 国家电网有限公司信息通信分公司 | Electric power communication link data checking method based on depth-first search algorithm |
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2015
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Patent Citations (5)
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| CN103474990A (en) * | 2013-09-17 | 2013-12-25 | 国家电网公司 | Power distribution network fault quick recovery method based on micro-grid and controllable load of micro-grid |
| CN103928926A (en) * | 2014-04-28 | 2014-07-16 | 国网宁夏电力公司宁东供电公司 | Load transferring system and method during power distribution network fault |
| CN104112240A (en) * | 2014-07-18 | 2014-10-22 | 国家电网公司 | Power failure analytical method based on topological island analysis |
| CN204361674U (en) * | 2014-12-02 | 2015-05-27 | 湖南智仁科技有限公司 | A kind of distribution network failure process, load safeguards system |
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Effective date of registration: 20200205 Address after: 550002 No. 17 Binhe Road, Nanming District, Guizhou, Guiyang Patentee after: GUIZHOU POWER GRID CO., LTD. Address before: 550003 No. 38 South Ruijin Road, Guizhou, Guiyang Co-patentee before: Beijing King Star Hi-Tech System Control Co., Ltd. Patentee before: INFORMATION & COMMUNICATION BRANCH OF GUIZHOU GRID COMPANY |
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