CN102185298B - Relay protection method for power supply circuit based on communication network - Google Patents
Relay protection method for power supply circuit based on communication network Download PDFInfo
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- CN102185298B CN102185298B CN201110120902.5A CN201110120902A CN102185298B CN 102185298 B CN102185298 B CN 102185298B CN 201110120902 A CN201110120902 A CN 201110120902A CN 102185298 B CN102185298 B CN 102185298B
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Abstract
The invention discloses a relay protection method for a power supply circuit based on a communication network. The method comprises the following steps of: partitioning power supply sections from the power supply outlet end to the tail end of the power supply circuit, wherein a power supply section is formed between two circuit breakers on the power supply circuit, and a section controlled by a circuit breaker positioned at the tail end of the power supply circuit serves as a primary power supply section; realizing communication junction of the communication interface of a relay protection device of the circuit breaker in each partitioned power supply section through a wireless network; making each relay protection device transmit a detected fault signal with an identification code to the relay protection device in each power supply section close to the power supply outlet end respectively through a network; and making the relay protection device which receives the fault signal determine the position of the relay protection device which transmits the fault signal according to the identification code of the fault signal respectively and determine a failed power supply section according to the position of the relay protection device which is furthest away from the power supply outlet end. By adopting the method, the relay protection control and protection setting of the power supply circuit are simplified.
Description
Technical field
The present invention relates to supply line's relaying protection system, especially relate to the supply line's relay protecting method based on communication network.
Background technology
At present, existing relaying protection system has two classes to the relay protecting method of supply line: 1, according to the electric parameters of circuit one end, change current/voltage protection, the distance protection of determining protection range and manner of execution; 2, according to the electric parameters at circuit two ends, change longitudinal differential protection, carrier current protection, the MICROWAVE PROTECTION of determining protection range and manner of execution.When protection philosophy Dou Shidang supply line breaks down; by protective relaying device to line electricity tolerance changing value relatively come to determine protection range and protected mode, according to definite protection range, take different protection manner of execution and sequence of movement to realize different protections.
First kind guard method is because line electricity tolerance is subject to electric power system different running method, line impedance, the impact of fault state and the deviation that produces is larger, protective device cannot be determined the line level fragment position of fault origination point exactly, take corresponding protected mode, even can produce protection disappearance or the protection of bypassing the immediate leadership, when supply line more in short-term, the fault electric values of segment protection device at the corresponding levels and subordinate's segment protection device monitoring differs very little, and the fault electric values of the fault of a section of same protective device monitoring under different running method and failure condition differs greatly, cannot accurately determine protection range by the size of electric values, can only realize time delay cascade protection by protections at different levels being arranged to different deferred action values along circuit, like this, track section more than tail end line all loses quick-break main protection.Therefore, the protection of multistage short-term road system, owing to can only adopting the method for classification cumulative delay action, can not realize fast tripping protection completely, causes protection disappearance.And, when Protective levels is more, in order to guarantee the selectivity of protective device, the delay time that adds up step by step, the delay time of the protective device of circuit head end will be very large, cannot meet the requirement of rapidity of relay protection, and expansion causes the accident; If guaranteed the rapidity of head end; delay time is too short; be less than the intrinsic operate time of protective device and switch; the delay time of rear first class of protection device cannot be avoided the operate time of previous stage protective device; cannot guarantee the selectivity of end action; can there is all starting protection tripping operations, cause overstep tripping accident.
Equations of The Second Kind guard method is because protective device needs the electric parameters at alternative route two ends; be only applicable to one section of protection in circuit; can only judge in the protection range whether fault occur in its protective device; and can not judge fault section outside the protection range that occurs in its protective device apart from the section interval of this protective device, take more fully multistage backup protection.And the electrical data of transmission is many, time segment length, the impact that disturbed by transmission line situation, load mode, electric power system fault, can produce error or interruption, causes protection to lose efficacy or malfunction.And, protective device complex structure, the electric parameters at transmission lines two ends need to arrange guide wire, high-frequency apparatus, microwave equipment, and equipment investment is large, so be only applied on important high pressure and supertension line at present.
Therefore, existing supply line relay protecting method and protective device can not accurately be judged the track section position that fault occurs, thereby determine protection range and the protected mode of protective relaying device, cause supply line's protection disappearance and the malfunction trip protection of bypassing the immediate leadership.
Summary of the invention
The object of the invention is to provide a kind of supply line's relay protecting method based on communication network, accurately determines supply line's relaying protection scope, takes corresponding the means of relay protection in time to realize.
For achieving the above object, the present invention can take following technical proposals:
Supply line's relay protecting method based on communication network of the present invention, carries out according to following step:
One, the self-powered line power port of export to end is divided power supply section; It in supply line, between two circuit breakers, is a power supply section; Being positioned at the supply line that supply line's end circuit breaker controls is one-level power supply section; Between supply line's end circuit breaker circuit breaker adjacent with close power outlet end, be secondary power supply section, to power outlet end, analogize and divide power supply section successively;
Two, the protective relaying device communication interface of the circuit breaker of each power supply section of dividing is realized to communication connection by wired or wireless communication network;
Three, the protective relaying device of the circuit breaker of described each power supply section sends fault-signal with identity code by described wired or wireless communication network to the protective relaying device of the section of respectively powering near power outlet end by detected fault message respectively;
Four, the protective relaying device of receiving fault-signal is determined respectively the position of the protective relaying device that sends this fault-signal according to the identity code of fault-signal, and the power supply section occurring according to the location positioning fault apart from power outlet end protective relaying device farthest, then the power supply section occurring according to fault and the number of its section of powering are separately determined the relaying protection scope of having set, and take according to the described relaying protection scope of having set the means of relay protection of having set;
If now in supply line, certain protective relaying device breaks down and loses protective capability; the protective relaying device of the previous stage power supply section of the power supply section at the protective relaying device place of breaking down can be merged into the power supply section at fault protective relaying device place and described previous stage power supply section the power supply protection section of oneself, automatically replaces fault protective relaying device to shoulder the defencive function of fault protective relaying device.
Described relaying protection scope is: the protective relaying device of every one-level service area section is the nearly backup relaying of the adjacent power supply of the next stage away from power outlet end section; Also be the backup relaying far away away from the lower secondary power supply section of power outlet end simultaneously.
Described wired or wireless communication network and the communication connection of power supply monitoring device; Described each protective relaying device sends the fault-signal with identification by the fault message detecting separately to described power supply monitoring device; power supply monitoring device is determined the protected mode of each protective relaying device according to the signal of each protective relaying device of receiving, and to each protective relaying device transmitted signal instruction to take corresponding the means of relay protection.
Described each protective relaying device compares the rear timing of judgement to described power supply monitoring device transmission by the electric parameters of collection and setting value; What power supply monitoring device sent according to each protective relaying device receiving can judge with identification signal whether described wired or wireless communication network and each protective relaying device normally work.
The invention has the advantages that the fault-signal section position that accurately definite fault occurs gathering according to the protective relaying device in supply line, and protection range and the protected mode of the protective relaying device of the different section distances of definite distance fault generation section, take corresponding error protection; No matter fault occurs in that section of circuit; each track section has main protection and multistage backup protection; do not need the protection delay time that adds up step by step; therefore there will not be protection disappearance; prevent the bypassing the immediate leadership of protective relaying device, more protection range misoperation, thereby simplified relay protection and control and the protection setting method of supply line.
Accompanying drawing explanation
Fig. 1, Fig. 2 are the embodiment supply line schematic diagrames of the method for the invention.
Embodiment
Supply line's relay protecting method based on communication network of the present invention, first the self-powered line power port of export to end is divided power supply section; It in supply line, between two circuit breakers, is a power supply section.As shown in Figure 1, the end circuit breaker DL1 bringing onto load D1 of institute is one-level power supply section, when D1 point breaks down, protective relaying device B1, B2, B3, B4 detects fault data, protective relaying device B1 passes through wired or wireless communication network to protective relaying device B2, B3, B4 sends the fault-signal with identity code (address code), protective relaying device B2 is to protective relaying device B3, B4 sends the fault-signal with identity code (address code), protective relaying device B3 sends the fault-signal with identity code (address code) to protective relaying device B4.
Because detecting fault, protective relaying device B1 occurs; do not receive the fault-signal that protective relaying device B2, B3, B4 send; therefore can determine that fault occurs in described one-level power supply section, the main protection section that this power supply section is protective relaying device B1, takes main protection mode.
And protective relaying device B2 only receives the fault-signal that protective relaying device B1 sends; determine that fault occurs in one-level power supply section; according to the one-level power supply section of setting, be the nearly backup relaying power supply section of protective relaying device B2, so protective relaying device B2 take nearly backup relaying mode.
Protective relaying device B3 receives the fault-signal that protective relaying device B1 and B2 send; because protective relaying device B1 is the distal-most end protective relaying device of sending fault-signal; therefore can determine that fault occurs in one-level power supply section; according to the one-level power supply section of setting, be the backup protection power supply section far away of protective relaying device B3, protective relaying device B3 takes backup relaying mode far away.
Protective relaying device B4 receives the fault-signal that protective relaying device B1, B2 and B3 send; because protective relaying device B1 is the distal-most end protective relaying device of sending fault-signal; therefore can determine that fault occurs in one-level power supply section; according to the one-level power supply section of setting outside the backup relaying power supply section of protective relaying device B4, so protective relaying device B4 takes super backup relaying mode far away or starting protection not.
If now protective relaying device B2 breaks down, protective relaying device B3 can not receive the fault-signal that protective relaying device B2 sends, can determine that fault occurs in the main protection section of protective relaying device B1 and protective relaying device B2 loses protective capability because of fault, according to setting, protective relaying device B3 circuit breaker DL3 to the power supply section between circuit breaker DL2, and circuit breaker DL2 merges into the nearly backup relaying power supply section of oneself to two power supply sections between circuit breaker DL1, by backup relaying mode far away, change nearly backup relaying mode into, automatically replace protective relaying device B2 to shoulder the backup relaying mode of protective relaying device B1, make one-level power supply section under protective relaying device B2 failure condition, still there is backup relaying, the analogue of other protective relaying device by that analogy.
When circuit breaker DL2 breaks down to the D2 point of the power supply section between circuit breaker DL1 (secondary power supply section); protective relaying device B1 can not detect fault data; and protective relaying device B2, B3, B4 detect fault data; now; protective relaying device B2 sends fault-signal to protective relaying device B3, B4, and protective relaying device B3 sends fault-signal to protective relaying device B4.Protective relaying device B1 occurs because fault not detected, not starting protection.
Simultaneously; protective relaying device B2 does not receive the fault-signal that other protective relaying device is sent; can determine that fault occurs in circuit breaker DL2 to the power supply section between circuit breaker DL1 (secondary power supply section); according to setting; the main protection section of protective relaying device B2 is taked main the means of relay protection, and protective relaying device B3 is nearly backup relaying section and take nearly backup relaying mode.
Because protective relaying device B4 only receives the fault-signal that protective relaying device B2 and protective relaying device B3 send; protective relaying device B2 is the distal-most end protective relaying device of sending fault-signal; can determine that fault occurs in circuit breaker DL2 to the power supply section between circuit breaker DL1; according to setting, protective relaying device B4 takes backup relaying mode far away.
If certain protective relaying device breaks down while losing protective capability in supply line; as previously mentioned; the protective relaying device of the last power supply section breaking down can be merged into two power supply sections the power supply protection section of oneself; automatically replace fault protective relaying device to shoulder the defencive function of fault protective relaying device; therefore the power supply section that, fault protective relaying device is protected still can obtain relaying protection under failure condition.
As shown in Figure 2, also can be by described wired or wireless communication network and the communication connection of power supply monitoring device; Each protective relaying device sends the fault-signal with identity code (address code) by the fault message detecting separately to described power supply monitoring device; power supply monitoring device is determined the protected mode of each protective relaying device according to the signal of each protective relaying device of receiving, and to each protective relaying device transmitted signal instruction to take corresponding the means of relay protection.
Claims (2)
1. the supply line's relay protecting method based on communication network, is characterized in that:
One, the self-powered line power port of export to end is divided power supply section; It in supply line, between two circuit breakers, is a power supply section; Being positioned at the supply line that supply line's end circuit breaker controls is one-level power supply section; Between supply line's end circuit breaker circuit breaker adjacent with close power outlet end, be secondary power supply section, to power outlet end, analogize and divide power supply section successively;
Two, the protective relaying device communication interface of the circuit breaker of each power supply section of dividing is realized to communication connection by wired or wireless communication network;
Three, the protective relaying device of the circuit breaker of described each power supply section sends fault-signal with identity code by described wired or wireless communication network to the protective relaying device of the section of respectively powering near power outlet end by detected fault message respectively;
Four, the protective relaying device of receiving fault-signal is determined respectively the position of the protective relaying device that sends this fault-signal according to the identity code of fault-signal, and the power supply section occurring according to the location positioning fault apart from power outlet end protective relaying device farthest, then the power supply section occurring according to fault and the number of its section of powering are separately determined the relaying protection scope of having set, and take according to the described relaying protection scope of having set the means of relay protection of having set;
If now in supply line, certain protective relaying device breaks down and loses protective capability; the protective relaying device of the previous stage power supply section of the power supply section at the protective relaying device place of breaking down can be merged into the power supply section at fault protective relaying device place and described previous stage power supply section the power supply protection section of oneself, automatically replaces fault protective relaying device to shoulder the defencive function of fault protective relaying device.
2. the supply line's relay protecting method based on communication network according to claim 1, is characterized in that: described relaying protection scope is: the protective relaying device of every one-level service area section is the nearly backup relaying of the adjacent power supply of the next stage away from power outlet end section; Also be the backup relaying far away away from the lower secondary power supply section of power outlet end simultaneously.
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| CN201110120902.5A CN102185298B (en) | 2011-05-11 | 2011-05-11 | Relay protection method for power supply circuit based on communication network |
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| CN201110120902.5A CN102185298B (en) | 2011-05-11 | 2011-05-11 | Relay protection method for power supply circuit based on communication network |
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| CN102510048B (en) * | 2011-10-27 | 2015-03-18 | 深圳市华力特电气股份有限公司 | Anti-override trip protection method |
| CN102882192B (en) * | 2012-06-29 | 2015-04-08 | 刘联和 | Technical method for relay protection of ''logic identification point protection group of 0 and 1 statuses'' of an electrical substation |
| CN103078289B (en) * | 2012-06-29 | 2015-05-06 | 南京南瑞继保电气有限公司 | Parallel multi-end direct-current power transmission line traveling-wave protection setting value setting method |
| CN104682359A (en) * | 2014-12-25 | 2015-06-03 | 国家电网公司 | Relay protection method of power supply line |
| CN110854798A (en) * | 2019-10-31 | 2020-02-28 | 国网山东省电力公司济宁供电公司 | Differential relay protection communication device, system and method based on 5G communication |
| CN112260241B (en) * | 2020-12-21 | 2021-03-26 | 中国电力科学研究院有限公司 | Protection device, pilot protection method and pilot protection system |
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| CN1619912A (en) * | 2004-12-10 | 2005-05-25 | 西宁电力学校 | Electric power back up protection method |
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| US20040090910A1 (en) * | 2002-11-12 | 2004-05-13 | Abb Inc. | Multi-terminal differential protection system |
| CN100431233C (en) * | 2006-07-06 | 2008-11-05 | 郭建厂 | Surface-protection type switching station fault judging method |
| CN102246374B (en) * | 2008-12-10 | 2015-05-27 | 西门子公司 | Method and safety device for monitoring a bus bar of an electrical energy supply grid |
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| CN1619912A (en) * | 2004-12-10 | 2005-05-25 | 西宁电力学校 | Electric power back up protection method |
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| Title |
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| 《基于馈线自动化的单相接地故障处理研究》;李健东;《中国优秀硕士学位论文全文数据库》;20030615(第02期);第12页 * |
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Owner name: BEIJING GUANGDA TAIXIANG AUTOMATION TECHNOLOGY CO. Free format text: FORMER OWNER: WU DENGQING Effective date: 20141119 |
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Effective date of registration: 20141119 Address after: 100083, room 3, building 16, 0701 Qinghua East Road, Beijing, Haidian District Patentee after: BEIJING GUANGDA TAIXIANG AUTOMATION TECHNOLOGY CO., LTD. Address before: 820, room 96, Yaxin investment building, No. 450006 middle navigation road, Henan, Zhengzhou Patentee before: Wu Dengqing |