CN102707198B - Feeder automation failure positioning method based on failure backcasting - Google Patents
Feeder automation failure positioning method based on failure backcasting Download PDFInfo
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Abstract
The invention discloses a feeder automation failure positioning method based on failure backcasting, which comprises the steps of: establishing a network topology according to a connecting relationship of switches and nodes, when failures occur, detecting that failed switches respectively search failures leftwards and rightwards according to the connecting relationship of the switches and the nodes; when searching that the node is a power supply point, backcasting to a failure point, setting a node state on a path as a failure; and finally, searching stages of nodes at two sides of all switches, if one node at two sides of one switch is in a failure state and other node is in a normal state, judging that the switch is a failed switch, and isolating the failed switch, and using the normal switch connected with the node in a failure stat at one side of the failed switch as an opposite isolation switch. According to the invention, the failure can be accurately and rapidly located, the problem of misjudgment or failure of the whole feeder automatic system due to failure of some switches is solved, and the dependence of the centralized feeder automatic mode to the communication reliability is reduced.
Description
Technical field
The invention belongs to electric system distribution automation field, be specifically related to distribution feeder automation technology.
Background technology
Feeder automation (FA, feeder automation) refer to automation equipment or the system utilized, monitor the operation conditions of distribution line, find in time line fault, diagnose rapidly and be out of order interval and fault section isolated to the power supply of fast quick-recovery to non-fault section.
Feeder automation is a critical function in distribution automation, fault handling is the top priority of feeder automation, distribution automation is the modern inexorable trend of electric system, its major significance is: when distribution is broken down, find rapidly fault section, fast isolated fault section, automatically recover in time non-fault zone user's power supply, therefore shorten the power off time to user, reduced power failure area, improved power supply reliability.Feeder automation has two kinds of implementations: local control mode and centralized control.Local control mode is again voltage-type implementation, by automatic circuit, realizes, and switch tripping when feeder line dead electricity is pressed, then closes block switch according to the examination of time delays order, finally determines fault section isolated fault recover non-faulty section and power again.Centralized control, by on-load switch, FTU(feeder automation detection and control terminal) add main station system and realize.By FTU, detect electric current with Judging fault, failure message is concentrated and is sent to main website, by main website, determines fault section, then by main station system, sends out guidance command gauge tap and moves, and completes fault isolation and recovers the power supply of non-faulty section.Centralized control, owing to having introduced power distribution automation main station system, completes localization of fault by computer system, so localization of fault is rapid, can realize fast the automatic recovery power transmission of non-fault section, and switch motion number of times is few, also little to the impact of distribution system.Its shortcoming is, needs high-quality communication port and computing machine main website, and communication system is had relatively high expectations, and when line fault, requires corresponding information can be sent in time higher level station, and higher level's control information sending of standing also can be sent to rapidly FTU.When some or part FTU break down or communicating interrupt, main station system possibly cannot be located abort situation or location mistake according to incomplete information.
Summary of the invention
Based on the above, analyze, and solve the above-mentioned problems in the prior art, the invention discloses a kind of feeder automation Fault Locating Method pushing back based on fault.
The present invention specifically by the following technical solutions.
The feeder automation Fault Locating Method pushing back based on fault, the method is for the localization of fault of the feed line automatization system of centralized communication, and this method comprises following steps:
(1) definition switch, nodal community, and according to real network topology, annexation is set;
(2), based on original feed line automatization system, obtain real-time switch position signal, fault-signal;
(3) when having arbitrary switch to report over current fault signal, it is starting point that feed line automatization system be take the switch that sends fault-signal, to this switch left and right both direction, according to the annexation of node and switch, carry out abort situation respectively and search, check successively switch position signal, fault-signal, nodal community;
(4), if when searching nodal community and being power supply node, return along former search pattern, until send the switch of over current fault signal, all node states in Jiang Yan road are set to malfunction simultaneously; If search endpoint node or switch, be that gate-dividing state is searched for end, along the node state on road, maintain the original state, do not change;
(5) check all switches both sides node state of searching for, if one of switch both sides node state is fault, one is non-fault, the switch that this switch is isolated fault, need tripping operation, and the regular tap of the not reporting fault signal being connected with the node of the non-malfunction of this breakdown switch one side is the switch of offside isolated fault, need tripping operation;
(6) trip signal of the switch of isolated fault is handed down to the FTU to inductive switch by feed line automatization system main website, and remote control tripping operation, completes localization of fault, isolation.
The Fault Locating Method pushing back according to the fault of above step, the impact of Ke Bushou local problem, still can locate fault fast and accurately, and definite disconnector, has solved centralized feed line automatization system communication reliability is depended on unduly.
Accompanying drawing explanation
Fig. 1 is switch, node definition schematic diagram;
Fig. 2 is switch, nodal community and connects generating network topology schematic diagram;
Fig. 3 is that fault pushes back schematic flow sheet.
Specific embodiments
Below according to Figure of description the further statement in detail of the concrete methods of realizing in feed line automatization system to the present invention in conjunction with specific embodiments.
This method can realize on the main website of centralized feed line automatization system or substation.
First need to define the attribute of switch and node.Switch attribute is divided into power supply point switch, regular tap, branch line switch, interconnection switch; Nodal community is divided into power supply node, ordinary node and endpoint node (being the node of line end), and node state is divided into normal condition and malfunction, and during initialization, node state is defaulted as normal condition.
Power supply point switch: first switch being connected with power supply node.
Regular tap: switch both sides all have switch to be connected to the switch of power supply node.
Branch line switch: only have a side to have switch to be connected to the switch of power supply node.
Interconnection switch: the connecting valve of two power supplys, be responsible for the power supply of the non-fault zone of recovery, normal run time behaviour is a minute position.
Switch has unique switch number as shown in Figure 1, each switch has defined connected left and right node, node also has connected switch, according to annexation, just generated network topology structure, node A, I are power supply node as shown in Figure 2, K switch 1, K8 are power supply point switch, and K9, K10 are branch line switch, and K2-K7 is regular tap.
Based on original feed line automatization system, can obtain real-time switch position signal and fault-signal; When line failure, the FTU that fault current detected can report main station system by fault-signal, when main station system, receive any one fault-signal and start fault search, fault search be take FTU that fault-signal detected inductive switch is started respectively to search to the left and right as starting point, inquire about successively position signalling and the nodal community of each switch, until power supply node or the position of the switch be in a minute bit switch, or line end.As shown in Figure 3, trouble spot is at F point, and the FTU of K1-K5 switch detects fault current, and reporting fault signal, take scheme in K5 switch be example, shown in solid arrow direction be fault search direction, following searching route:
K5->F->K6->G->K7 inquires about the position of the switch and nodal community successively, inquires K switch 7 for open position, and search finishes;
K5->E->K9->J->K10->K inquires about the position of the switch and nodal community successively, to endpoint node, do not have other switches to be connected with it, search finishes.
K5->E->K4->D->K3->C->K2->B->K1->A searches power supply node, start to push back, when searching power supply node, by original route, push back the starting point switch that search starts, all nodes in Bing Jiangyan road are all set to malfunction.
Path A->B->C->D as shown in Fig. 3 dotted arrow->E node state is all set to fault.
After all search all completes, detect the left and right node state of all switches, if certain switch one side gusset is malfunction, opposite side node is non-malfunction, and this switch, for needing the breakdown switch of isolation, needs tripping operation; The non-fault side (breakdown switch of above-mentioned needs isolation, there are two nodes in left and right, one side gusset is set to malfunction, the node of one side is normal condition, non-fault side just refers to this side of node of this normal condition) node be trouble spot (being the F node of K6), the regular tap (K6) of the not reporting fault signal being attached thereto is also the switch that needs isolated fault, needs tripping operation, and branch line switch does not need isolated operation.If K5, K6 in Fig. 3 are the switch that needs isolated fault.The trip signal of disconnector is handed down to the FTU to inductive switch by main website, remote control tripping operation.
In these cases, if the FTU device of K switch 3, K4 breaks down or communicating interrupt, its correct reporting fault information, now the correct reporting fault information of other switches can make main website normally start fault search, searching route is still identical with above-mentioned example with result, although K3, K4 switch do not have reporting fault, are set with in the process that the Reflector of its node pushes back at fault search, still can guarantee the correctness of localization of fault.Conventional only by the Fault Locating Method of two adjacent switch fault information relatively, for the FTU device of K switch 3, K4, break down or the situation of communicating interrupt, because a side has fault, the trouble-free node of a side has C, E, tri-points of F, can cause the mistake of localization of fault.If having solved in centralized feed line automatization system, described method of the present invention have the fault detection capability of one or more FTU own to lose efficacy or communicating interrupt, feed line automatization system can not be located abort situation or be located wrong defect, reduce centralized feed line automatization system communication reliability is depended on unduly.
Claims (2)
1. the feeder automation Fault Locating Method pushing back based on fault, the method is for the localization of fault of the feed line automatization system of centralized communication, described method breaks down or still can accurately carry out localization of fault communicating interrupt in the situation that at part FTU, it is characterized in that, this method comprises following steps:
(1) definition switch, nodal community, and according to real network topology, annexation is set;
(2), based on original feed line automatization system, obtain real-time switch position signal, fault-signal;
(3) when having arbitrary switch to report over current fault signal, it is starting point that feed line automatization system be take the switch that sends fault-signal, to this switch left and right both direction, according to the annexation of node and switch, carry out abort situation respectively and search, check successively switch position signal, fault-signal, nodal community;
(4), if when searching nodal community and being power supply node, return along former search pattern, until send the switch of over current fault signal, all node states in Jiang Yan road are set to malfunction simultaneously; If search endpoint node or switch, be that gate-dividing state is searched for end, along the node state on road, maintain the original state, do not change;
(5) check all switches both sides node state of searching for, if one of switch both sides node state is fault, one is non-fault, the switch that this switch is isolated fault, need tripping operation, and the regular tap of the not reporting fault signal being connected with the node of the non-malfunction of this breakdown switch one side is the switch of offside isolated fault, need tripping operation;
(6) trip signal of the switch of isolated fault is handed down to the FTU to inductive switch by feed line automatization system main website, and remote control tripping operation, completes localization of fault, isolation.
2. the feeder automation Fault Locating Method pushing back based on fault according to claim 1, is characterized in that:
Switch attribute is divided into power supply point switch, regular tap, branch line switch, interconnection switch; Nodal community is divided into power supply node, ordinary node and endpoint node, and node state is divided into normal condition and malfunction.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103150625B (en) * | 2012-10-22 | 2014-08-06 | 山东电力集团公司青岛供电公司 | Feeder terminal unit (FTU)-based power failure event information acquisition method and system |
| CN103761625A (en) * | 2014-02-13 | 2014-04-30 | 国家电网公司 | Outage management system based on information exchange bus and data processing method thereof |
| CN105067959B (en) * | 2015-09-15 | 2017-11-28 | 长沙威胜信息技术有限公司 | Fault Locating Method under the conditions of ring network power supply |
| CN105548801B (en) * | 2015-12-02 | 2018-12-07 | 南京四方亿能电力自动化有限公司 | Fault Locating Method suitable for power distribution network operation with closed ring |
| CN106154115A (en) * | 2016-06-16 | 2016-11-23 | 上海交通大学 | Distributed feed line automatization terminal and distribution line failure judgement system, method |
| CN106597210B (en) * | 2016-09-29 | 2020-04-07 | 国网新疆电力公司 | Distribution network star-sky-map monitoring method based on SIM card state |
| CN108493928B (en) * | 2018-03-28 | 2021-11-05 | 国电南瑞科技股份有限公司 | Distributed feeder automation distribution line topology ad hoc network method |
| CN109655709A (en) * | 2018-10-19 | 2019-04-19 | 南京海兴电网技术有限公司 | A kind of Fault Locating Method based on distributed feeder automation |
| CN110221183A (en) * | 2019-07-11 | 2019-09-10 | 国网浙江省电力有限公司杭州市大江东供电公司 | Distribution Network Failure method for early warning and system towards non-power distribution automation overlay area |
| CN111123160B (en) * | 2019-12-02 | 2024-06-25 | 国网浙江省电力有限公司台州供电公司 | Fault positioning method and device for secondary circuit of switch cabinet mechanism |
| CN112018887B (en) * | 2020-08-18 | 2022-06-10 | 江苏省电力试验研究院有限公司 | Distribution network feeder automatic operation process supervision and analysis method |
| CN113030642B (en) * | 2021-03-03 | 2021-11-16 | 北京天能继保电力科技有限公司 | Automatic field test method and system for feeder automation |
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| CN100376069C (en) * | 2005-03-14 | 2008-03-19 | 上海申瑞电力自动化科技有限公司 | Non-master station transinission and distribution network control method |
| EP2308149B1 (en) * | 2008-07-21 | 2017-08-30 | ABB Research Ltd. | Feeder automation system and method for operating the same |
| CN102005746A (en) * | 2010-11-30 | 2011-04-06 | 南京南瑞继保电气有限公司 | Method based on topology protection of distributing network |
| CN102306956A (en) * | 2011-09-14 | 2012-01-04 | 宁波市鄞州供电局 | Feed line automation system |
| CN202260451U (en) * | 2011-10-26 | 2012-05-30 | 广州德昊电子科技有限公司 | Regional intelligent power distribution network system |
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Owner name: ZHANGJIAKOU POWER SUPPLY COMPANY, JI-BEI ELECTRIC Free format text: FORMER OWNER: BEIJING SIFANG JIBAO AUTOMATION CO., LTD. Effective date: 20130704 Owner name: STATE ELECTRIC NET CROP. Free format text: FORMER OWNER: ZHANGJIAKOU POWER SUPPLY COMPANY, JI-BEI ELECTRIC POWER CO., LTD. Effective date: 20130704 |
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Effective date of registration: 20130704 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: Zhangjiakou Power Supply Company of Jibei Electric Power Co., Ltd. Applicant after: Beijing Sifang Jibao Automation Co., Ltd. Address before: 075000 No. 131, Wuyi street, Qiaodong District, Hebei, Zhangjiakou Applicant before: Zhangjiakou Power Supply Company of Jibei Electric Power Co., Ltd. Applicant before: Beijing Sifang Jibao Automation Co., Ltd. |
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