CN106451373A - Bidirectional allowable protection method employing master station to identify dynamic topology for power distribution circuit - Google Patents

Bidirectional allowable protection method employing master station to identify dynamic topology for power distribution circuit Download PDF

Info

Publication number
CN106451373A
CN106451373A CN201610511009.8A CN201610511009A CN106451373A CN 106451373 A CN106451373 A CN 106451373A CN 201610511009 A CN201610511009 A CN 201610511009A CN 106451373 A CN106451373 A CN 106451373A
Authority
CN
China
Prior art keywords
ftu
overcurrent
signal
action
fault
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610511009.8A
Other languages
Chinese (zh)
Inventor
任力
贾廷波
李兵
尹德强
王晓梅
申磊
王毅
刘永
朱晓东
王邦惠
孙晓斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rizhao Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
Rizhao Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rizhao Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical Rizhao Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority to CN201610511009.8A priority Critical patent/CN106451373A/en
Publication of CN106451373A publication Critical patent/CN106451373A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02HEMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/26Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
    • H02H7/261Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
    • H02H7/262Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders

Abstract

The invention discloses a bidirectional allowable protection method employing a master station to identify a dynamic topology for a power distribution circuit. The method comprises the steps of firstly, dividing an FTU (Feeder Terminal Unit) into a boundary FTU and an intermediate FTU, and determining whether the boundary FTU is an initial-end FTU or a tail-end FTU or not by the master station through dynamic topology identification; judging whether an allowable signal is sent to an upper-level FTU and a lower-level FTU according to an overcurrent whether can be sensed by the FTU or not; controlling corresponding circuit breakers to do action according to the overcurrent whether can be sensed by the initial-end FTU, the tail-end FTU and the intermediate FTU and the allowable signal whether is received or not within a stipulated time; and outputting the actions of the circuit breakers if the overcurrent exists within time () after a fault to achieve fault protection between the initial-end FTU and an outgoing line circuit breaker. The method utilizes a network communication technology to complete action information exchange among adjacent levels of protection, the action delay brought by multi-level matching is effectively shortened, the fault is rapidly isolated, and the fault danger is reduced.

Description

Identify the distribution line two-way permissive type guard method of dynamic topology using main website
Technical field
The present invention relates to electric power system power distribution circuit relay protection field, more particularly, to one kind are dynamically opened up using main website identification The distribution line two-way permissive type guard method flutterred.
Background technology
Traditional relay protection be mostly using setting valve size and temporal cooperation realize line fault detection and Isolation, is difficult to coordinate using definite value, action of easily bypassing the immediate leadership.Using time coordination, fault clearing time length is it is possible to endanger main transformer etc. Equipment.And relay protection and automatic safety device lack cooperation each other, separate it is impossible to carry out data sharing.In a word Existing protection and automatic safety device can not meet the requirement of power system development.
In recent years, distribution network automated technology, be based particularly on peer-to-peer communications distributed intelligence control technology quick Development, provides opportunity for improving electric power system power distribution circuit relay protection, emerges blocking protection, differential protection, permission The a collection of new technologies such as formula protection.But due to due to management system, most of outlet breakers do not include distribution network automated pipe Reason system is it is impossible to carry out depth cooperation with line-automation or protection equipment.Meanwhile, distribution network closed-loop design, open loop operation, real There is a problem of in the power supply process of border that power failure is specialized in, network topology structure changes.And between existing utilization FTU, exchange information Relay protecting method is does not consider this 2 points of problems, leads to scene application to there are many problems.
《University Of Chongqing's journal》Middle paper《The quick protection philosophy of distribution line and analysis》In refer to two kinds of guard methods: Two-way enclosed type overcurrent protection and two-way permissive type overcurrent protection, wherein, two-way permissive type overcurrent protection is divided into again to be sentenced The two-way permissive type overcurrent protection in disconnected fault current direction and the two-way permissive type over current protection of the non-failure judgement sense of current Shield.The operation principle of two-way permissive type overcurrent protection method is:Differentiate the sense of current, FTU flows out direction to fault current and sends out Allow signal, fault current inflow direction is not signaled, is equally FTU only to the FTU sending signal of its adjacent side.Right It is both needed to Judging fault electric current side in two-way permissive type overcurrent protection and the two kinds of guard methods of two-way enclosed type overcurrent protection To, be not suitable for scene application.The two-way permissive type overcurrent protection method of the Judging fault sense of current does not differentiate electric current side To, FTU sends out to its adjacent both sides after experiencing overcurrent and allows signal it is desirable to outlet breaker participates in allowing the transmission of signal, Do not adapt to live outlet breaker and be not involved in the situation that signal sends or receives.
Content of the invention
The present invention be directed to the deficiency existing for prior art, and provide one kind and realize FTU using Fibre Optical Communication Technology Between information exchange, realize accurately quickly positioning, the isolation of fault, the one kind reducing fault harm utilizes main website identification dynamic The distribution line two-way permissive type guard method of topology.
The present invention is directed to closed loop configuration open loop operation(There is stand-by power supply and turn confession)And outlet breaker is not involved in allowing The distribution line of signal transmitting and receiving, using line terminal(FTU)Between peer-to-peer communications, adjacent exchange trouble between the superior and the subordinate and dynamic Make information, realize the protection of short trouble two-way permissive type.
The present invention solves technical problem and adopts the technical scheme that:FTU is divided into border FTU and middle FTU, main website leads to Cross dynamic topology identification and determine that border FTU is top FTU or tail end FTU, and corresponding information is handed down to each FTU;FTU is not When experiencing overcurrent, send to its adjacent FTU and allow signal it is allowed to adjacent FTU carries out trip operation;Beginning, tail end and centre Whether FTU, experience overcurrent according to it, and whether receives permission signal at the appointed time, controls respective circuit breakers Whether carry out action;If the () time after a failure, still suffer from overcurrent, outlet breaker action, realize head end FTU and outlet The protection of fault between breaker.
Concrete methods of realizing comprises the following steps:
Step 1:FTU is divided into border FTU and middle FTU;
Step 2:For the dual power supply distribution network of closed loop design, open loop operation, define the next FTU of power outlet breaker For border FTU, remaining whole FTU is middle FTU;
Step 3:Main website is identified by dynamic topology and determines that border FTU is top FTU or tail end FTU, specially:
1)If monitoring switch closure at the FTU of border, and its upstream outlet breaker being in closure state, then it is top FTU;
2)If monitoring switch closure at the FTU of border, and its upstream outlet breaker is off, then it is tail end FTU;
Step 4:Setting relay protection action current setting valve, specially:
1)If sampled current value, show that no overcurrent occurs;
2)If sampled current value exceedes, show have overcurrent to occur;
Step 5:The FTU experiencing overcurrent in the line sends request signal to adjacent FTU;
Step 6:Receive the border of request signal and middle FTU:
1)If do not experience overcurrent, send out permission signal to adjacent FTU, and start timing;
2)If experiencing overcurrent, will not send to adjacent FTU and allowing signal;
Step 7:Setting time T1, at that time, respectively it is not detected by the FTU of excessively stream according to receiving and allows signal decision-making whether action, It is specially:
1)For top FTU, send after request signal to adjacent FTU after experiencing overcurrent,
If A neighbours experience overcurrent, signal will not be allowed to top FTU feedback, respective circuit breakers are failure to actuate;
If B neighbours do not experience overcurrent, top FTU can be sent and allow trip signal, respective circuit breakers action;
2)For tail end FTU, experience overcurrent, respective circuit breakers action;
3)For middle FTU,
If A receives the permission signal that neighbours send to it, its respective circuit breakers action is tripped;
If B does not receive the permission signal that neighbours send to it, it is failure to actuate.
Step 8:Setting time (), when after fault, outlet breaker decision-making whether action, specifically, after a failure () when Between, i.e. the moment, if still suffering from overcurrent, outlet breaker action, realize the guarantor of fault between top FTU and wire-outgoing breaker Shield.
The invention has the beneficial effects as follows:
Compared with prior art, the present invention utilizes main website to identify the two-way permissive type new protective method of dynamic topology, using optical fiber The information that the communication technology is realized between FTU exchanges, and realizes accurately quickly positioning, the isolation of fault, reduces fault harm, fully examine Consider the present situation that live most of outlet breaker is not involved in permissive type sectionalised protection, by main website decision discernment border FTU For top FTU or tail end FTU, respective operating criterion is arranged to top, tail end, middle FTU, coordinates back-up protection, Field condition can be effectively adapted to, and the present invention does not need to judge power direction, simpler this method.Using computer network The information that the network communication technology is realized between FTU exchanges, and realizes accurately quickly positioning, the isolation of fault, reduces fault harm.Fully Take into account live most of outlet breaker to be not involved in determining whether to send showing of permissive type signal according to overcurrent in the time Shape, is accurately positioned, isolated fault.And consider distribution network closed-loop design, the problem of open loop operation, supply carrying out having a power failure turning, net After network change in topology, remain to be accurately positioned, isolated fault.
Brief description
Accompanying drawing 1 is system construction drawing;
Accompanying drawing 2 is power distribution automation structure chart;
Accompanying drawing 3 is a-power supply independent supply line structure chart under LB off-state;
Accompanying drawing 4 is that a-power supply is out of service, and region 1,2,3,4 is turned by B-source and supplies line assumption diagram;
Accompanying drawing 5 is that a-power supply is out of service, and region 3,4 is turned by B-source and supplies line assumption diagram.
Specific embodiment
For the technical characterstic of this programme can be clearly described, below by specific embodiment, this programme is illustrated.
Embodiment 1
1st, line facility configuration
Typically the power distribution network of link is all closed loop design hand in hand, open loop operation, and system architecture is as shown in Figure 1.By A, B two electricity Source powers, and each breaker installs corresponding FTU, wherein, be outlet breaker, outlet protection equipment is not involved in allowing signal Receive or send, corresponding outlet is protected as CB1, CB7;, for outlet breaker next breaker, define corresponding FTU2, FTU6 are border FTU, according to ruuning situation, identify that it is top or tail end FTU by main website;, for middle open circuit, LB is interconnection switch, and defining corresponding FTU3, FTU4, FTU5, FTU8 is middle FTU, and FTU8 is only under LB closure state Participate in allowing reception or the transmission of signal;In normal operation, LB is off, each self-powered in both sides, region 1,2,3,4 Powered by a-power supply, region 5,6,7 is powered by B-source;When power supply turn supplies, relevant breaker tripping, LB closes, and completes power supply Turn and supply.
2nd, the structure of power distribution automation
As shown in Figure 2, main website is located at control centre to the structure of power distribution automation, is core and the brain of distribution automation, from Achieve SCADA, feeder automation on the whole(FA)Etc. function.Substation(Communication concentrator)It is normally at transformer station, belong to net Network tandem equipment, plays a part to form a connecting link, and will be dispersed in the information taken of the distribution terminal on distribution line to going up together Pass to main website, the information that main website is issued is transmitted to corresponding distribution terminal.Distribution terminal includes line feed terminals FTU, and distribution transforming is eventually End TTU, switching station's terminal D TU etc..
3rd, the communication of electrical power distribution automatization system
1)Communication between main website and distribution terminal
Communication between main website and terminal adopts CLIENT/SERVER MODEL.Data is activation adopts the report of IEC 61850 (Reporting)Model, so both can ensure that the transmission of normal data, again can be by abnormal data release quickly.
2)Communication between distribution terminal and distribution terminal
Using CLIENT/SERVER MODEL and general GSE model between terminal and terminating layer.GSE is included towards general object Transformer substation case(GOOSE)With general substation state event(GSSE).GSE adopts broadcast mode, and the time delay to transmission has sternly The restriction of lattice.Network between feeder line layer and terminating layer is branching networks, and the IED on same branching networks typically will not be very Many, in order to realize the quick function of some feeder line layers, GSE model can be adopted.The use of GSE should be limited in feeder line layer Portion, it is to avoid cause the blocking of core network.
The communication network of distribution automation system, using the IP network infrastructure of layering, is divided into core network and branching networks. Core network connects control centre and transformer station, and the terminal device that branching networks will be dispersed on each distribution line is connected to one Rise, and be connected with transformer station.Core network needs the fiber optic network from high speed.At present, most of power supply enterprises build up SDH core network, can provide the bandwidth of 100 more than Mbps, meet distribution automation and other automated systems Demand.With the reduction of optical fiber price, fiber optic network has become the important form of branching networks, wireless public network and broadband power Line carrier wave is as supplementary form.At present, EPA and ethernet passive optical network(EPON)In distribution automation communication network It is widely used in network.
4th, between FTU neighbouring relations configuration
Neighbouring relations between FTU are configured by the topological structure of system by main website, FTU2, FTU3, FTU4, FTU8, FTU5, FTU6 adjacent the superior and the subordinate each other, by whether after can experiencing overcurrent, determine a need for sending permission signal.
5th, main website identification border FTU is top or tail end FTU
If monitoring switch closure at the FTU of border, and its upstream outlet breaker being in closure state, then it is top FTU;If Monitor switch closure at the FTU of border, and its upstream outlet breaker is off, then it is tail end FTU.
6th, communicate between fault detect and FTU
When there being FTU to receive permission signal in circuit, that is, detect the presence of fault.Do not experience the FTU of overcurrent to Its neighbour sends and allows signal.If all FTU all detect overcurrent, show that circuit is normal, fault-free exists.
7th, the positioning after fault and isolation, realizes the quick protection of distribution line
1)For top FTU, send after request signal to adjacent FTU after experiencing overcurrent, if neighbours experience overcurrent, Signal respective circuit breakers will be allowed to be failure to actuate to top FTU feedback;If neighbours do not experience overcurrent, top FTU can be sent out Send permission trip signal, respective circuit breakers action.
2)For tail end FTU, experience overcurrent, respective circuit breakers action.
3)For middle FTU, if receiving the permission signal that neighbours send to it, its respective circuit breakers action is tripped, instead It, then be failure to actuate.
4)() the time after a failure, i.e. the moment, if still suffering from overcurrent, outlet breaker action, realize head=top FTU The protection of fault and wire-outgoing breaker between.
During specific works, as shown in Figure 3, when interconnection switch LB disconnects, be powered by a-power supply, border FTU2 by Main website is identified as top FTU.
1)If being short-circuited fault at k1,
Due to only having CB1 to experience overcurrent.After delay time, CB1 remains to experience overcurrent, controls outlet breaker to jump Lock, successfully fault at excision circuit k1.
2)If being short-circuited fault at k2,
CB1, top FTU2, middle FTU3 experience overcurrent and send permission signal to adjacent FTU.
In the moment, FTU4 does not receive overcurrent, sends to adjacent FTU and allows signal to allow tripping operation, and FTU3 receives tripping operation letter Number laggard action is made, respective circuit breakers action.Fault at circuit k2 is excised in success.
Can't detect overcurrent in moment, circuit, CB1, head end FTU2 protect involution.
Embodiment 2
Different from embodiment be, load transfer, region 1,2,3,4 turns confession by B-source.
Now interconnection switch LB closure, as shown in Figure 4, border FTU2 is identified as tail end FTU, border FTU6 quilt by main website Main website is identified as top FTU.
1)If being short-circuited fault at k3,
Only CB7 experiences overcurrent.Other FTU are not felt by overcurrent, and respective circuit breakers can not possibly action.In delay time Afterwards, CB7 remains to experience overcurrent, controls outlet breaker tripping operation, successfully fault at excision circuit k4.
2)If being short-circuited fault at k2,
CB7, head end FTU6, middle FTU5, middle FTU8, middle FTU4 experience overcurrent, send inquiry letter to adjacent FTU Number.
In the moment, FTU3 does not experience overcurrent, sends to adjacent FTU and allows trip signal, and FTU4 receives tripping operation letter Respective circuit breakers action after number, successfully fault at excision circuit k2.
Overcurrent, CB7, head end FTU6, middle FTU5, middle FTU8 protection involution is can't detect in moment, circuit.
3)If being short-circuited fault at k1,
CB7, head end FTU6, middle FTU5, middle FTU8, middle FTU4, middle FTU3, end FTU2 all experience overcurrent, Send request signal to adjacent FTU.Tail end FTU2 experiences overcurrent, controls respective circuit breakers action, successfully excises circuit k3 Place's fault.
Other FTU all experience overcurrent and do not send the signal allowing tripping operation, can't detect electricity in moment, circuit Stream, CB7, head end FTU6, middle FTU5, middle FTU8, middle FTU4, middle FTU3 protection involution.
Embodiment 3
Different from embodiment 1 be, load transfer, region 3,4 turns confession by B-source, and region 1,2 is still powered by a-power supply
Now interconnection switch LB closure, QF3 is normally open, and as shown in Figure 5, border FTU2 is identified as top FTU by main website, Border FTU6 is also identified as top FTU by main website.Hereinafter analyze only taking B-source power supply area as a example.
1)If being short-circuited fault at k3,
Only CB7 experiences overcurrent.After delay time, CB7 remains to experience overcurrent, controls outlet breaker tripping operation, Fault at circuit k4 is excised in success.
2)If being short-circuited fault at k2,
CB7, head end FTU6, middle FTU5, middle FTU8, middle FTU4 experience overcurrent, send inquiry letter to adjacent FTU Number.
In the moment, FTU3 does not experience overcurrent and sends the signal allowing tripping operation to adjacent FTU, and FTU4 receives permission letter After number, respective circuit breakers action.Fault at circuit k2 is excised in success.
Overcurrent, CB7, head end FTU6, middle FTU5, middle FTU8 protection involution is can't detect in moment, circuit.
The above, be only presently preferred embodiments of the present invention, is not the restriction that the present invention is made with other forms, appoints What those skilled in the art possibly also with the disclosure above technology contents changed or be modified as equivalent variations etc. Effect embodiment.But every without departing from technical solution of the present invention content, according to the present invention technical spirit to above example institute Any simple modification, equivalent variations and the remodeling made, still falls within the protection domain of technical solution of the present invention.

Claims (1)

1. a kind of using main website identify dynamic topology distribution line two-way permissive type guard method it is characterised in that include with Lower step:
Step 1:FTU is divided into border FTU and middle FTU;
Step 2:For the dual power supply distribution network of closed loop design, open loop operation, define the next FTU of power outlet breaker For border FTU, remaining whole FTU is middle FTU;
Step 3:Main website is identified by dynamic topology and determines that border FTU is top FTU or tail end FTU, specially:
1)If monitoring switch closure at the FTU of border, and its upstream outlet breaker being in closure state, then it is top FTU;
2)If monitoring switch closure at the FTU of border, and its upstream outlet breaker is off, then it is tail end FTU;
Step 4:Setting relay protection action current setting valve, specially:
1)If sampled current value, show that no overcurrent occurs;
2)If sampled current value exceedes, show have overcurrent to occur;
Step 5:The FTU experiencing overcurrent in the line sends request signal to adjacent FTU;
Step 6:Receive the border of request signal and middle FTU:
1)If do not experience overcurrent, send out permission signal to adjacent FTU, and start timing;
2)If experiencing overcurrent, will not send to adjacent FTU and allowing signal;
Step 7:Setting time T1, at that time, respectively it is not detected by the FTU of excessively stream according to receiving and allows signal decision-making whether action, It is specially:
1)For top FTU, send after request signal to adjacent FTU after experiencing overcurrent,
If A neighbours experience overcurrent, signal will not be allowed to top FTU feedback, respective circuit breakers are failure to actuate;
If B neighbours do not experience overcurrent, top FTU can be sent and allow trip signal, respective circuit breakers action;
2)For tail end FTU, experience overcurrent, respective circuit breakers action;
3)For middle FTU,
If A receives the permission signal that neighbours send to it, its respective circuit breakers action is tripped;
If B does not receive the permission signal that neighbours send to it, it is failure to actuate;
Step 8:Setting time (), when after fault, outlet breaker decision-making whether action, specifically, the () time after a failure, The i.e. moment, if still suffering from overcurrent, outlet breaker action, realize the protection of fault between top FTU and wire-outgoing breaker.
CN201610511009.8A 2016-06-30 2016-06-30 Bidirectional allowable protection method employing master station to identify dynamic topology for power distribution circuit Pending CN106451373A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610511009.8A CN106451373A (en) 2016-06-30 2016-06-30 Bidirectional allowable protection method employing master station to identify dynamic topology for power distribution circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610511009.8A CN106451373A (en) 2016-06-30 2016-06-30 Bidirectional allowable protection method employing master station to identify dynamic topology for power distribution circuit

Publications (1)

Publication Number Publication Date
CN106451373A true CN106451373A (en) 2017-02-22

Family

ID=58183853

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610511009.8A Pending CN106451373A (en) 2016-06-30 2016-06-30 Bidirectional allowable protection method employing master station to identify dynamic topology for power distribution circuit

Country Status (1)

Country Link
CN (1) CN106451373A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109659918A (en) * 2019-03-07 2019-04-19 国网江苏省电力有限公司扬州供电分公司 A kind of synchronous phasor measurement wide-area differential protection system based on block chain
CN110401176A (en) * 2019-06-25 2019-11-01 深圳供电局有限公司 Zero line break protection device and its control method
CN110417123A (en) * 2019-07-26 2019-11-05 珠海市中力电力设备有限公司 One kind being used for intelligent distributed distribution automation terminal
CN111181246A (en) * 2020-01-09 2020-05-19 中电科安科技股份有限公司 Energy consumption analysis method and system based on intelligent circuit breaker
CN113285432A (en) * 2021-07-26 2021-08-20 广东电网有限责任公司东莞供电局 Automatic device and protection method for relay protection of power system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050280965A1 (en) * 2001-07-06 2005-12-22 Schweitzer Engineering Laboratories, Inc. Relay-to relay direct communication system and method in an electric power system
CN102185300A (en) * 2011-05-24 2011-09-14 安徽中兴继远信息技术有限公司 On-spot feeder automation equipment and realizing method thereof
CN104184134A (en) * 2014-09-03 2014-12-03 广西电网公司电力科学研究院 Distribution line bi-directional latch-up protection method based on master station decision identification

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050280965A1 (en) * 2001-07-06 2005-12-22 Schweitzer Engineering Laboratories, Inc. Relay-to relay direct communication system and method in an electric power system
CN102185300A (en) * 2011-05-24 2011-09-14 安徽中兴继远信息技术有限公司 On-spot feeder automation equipment and realizing method thereof
CN104184134A (en) * 2014-09-03 2014-12-03 广西电网公司电力科学研究院 Distribution line bi-directional latch-up protection method based on master station decision identification

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
肖久 等: "配电线路快速保护原理及分析", 《重庆大学学报》 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109659918A (en) * 2019-03-07 2019-04-19 国网江苏省电力有限公司扬州供电分公司 A kind of synchronous phasor measurement wide-area differential protection system based on block chain
CN110401176A (en) * 2019-06-25 2019-11-01 深圳供电局有限公司 Zero line break protection device and its control method
CN110417123A (en) * 2019-07-26 2019-11-05 珠海市中力电力设备有限公司 One kind being used for intelligent distributed distribution automation terminal
CN111181246A (en) * 2020-01-09 2020-05-19 中电科安科技股份有限公司 Energy consumption analysis method and system based on intelligent circuit breaker
CN113285432A (en) * 2021-07-26 2021-08-20 广东电网有限责任公司东莞供电局 Automatic device and protection method for relay protection of power system

Similar Documents

Publication Publication Date Title
CN106451373A (en) Bidirectional allowable protection method employing master station to identify dynamic topology for power distribution circuit
CN102037630B (en) Feeder automation system and method for operating the same
CN102790383B (en) Automatic rapid protection control method of novel feeder
CN107069676B (en) Distribution network failure positions and quickly isolates recovery control method
CN104184134B (en) The two-way latch-up protection method of distribution line based on main website decision discernment
CN106058831B (en) A kind of intelligent distributed quick protection of adaptive power distribution network and failure separation method
CN104113141B (en) A kind of intelligence longitudinally interconnects feeder automation control method
CN105375635A (en) Method and system of intelligent management of power distribution network cascading switching stations
Abbaspour et al. A bi-level multi agent based protection scheme for distribution networks with distributed generation
Liu et al. A high-reliability and determinacy architecture for smart substation process-level network based on cobweb topology
CN104767182A (en) Fault processing method for overhead line type power distribution network
CN103022994A (en) Method for achieving fault isolation and recovery of power distribution network with permeability distribution type power supply
CN109713794A (en) A kind of distributed intelligence self recoverable system and method
CN109149575A (en) A kind of ring-main unit and bicyclic net type power distribution network
CN102664466A (en) Feeder line automation system
CN102299563A (en) Digital-analog (DA) protection method for intelligent distribution network
CN104201657A (en) Power direction judgment based bidirectional blocking protection method for distributing line
CN106410807A (en) Method for transmitting four kinds of messages of intelligent substation in one physical network based on annular networking
CA3116929A1 (en) Tie switch restoration
CN104242456A (en) Feeder automation method and feeder automation system for power distribution network
Shahin Smart Grid self-healing implementation for underground distribution networks
CN106451374A (en) Power distribution network bidirectional allow type protection method based on FTU role identification
CN202550668U (en) Distributed power distribution network management terminal
CN104701823A (en) Networking intelligent switch protection system for feeders of power distribution networks
CN104269935B (en) Pressure looped network protection system interval layer network-building method in a kind of novel subway

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication
RJ01 Rejection of invention patent application after publication

Application publication date: 20170222