CN102185298A - 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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- CN102185298A CN102185298A CN2011101209025A CN201110120902A CN102185298A CN 102185298 A CN102185298 A CN 102185298A CN 2011101209025 A CN2011101209025 A CN 2011101209025A CN 201110120902 A CN201110120902 A CN 201110120902A CN 102185298 A CN102185298 A CN 102185298A
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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 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, the electric parameters according to circuit one end changes current/voltage protection, the distance protection of determining protection range and manner of execution; 2, the electric parameters according to the circuit two ends changes longitudinal differential protection, carrier current protection, the MICROWAVE PROTECTION of determining protection range and manner of execution.Protection philosophy all is when supply line breaks down; by protective relaying device to line electricity tolerance changing value relatively come to determine protection range and protected mode, take different protection manner of execution to realize different protections according to the protection range of determining with sequence of movement.
First kind guard method is because line electricity tolerance is subjected to the electric power system different running method; line impedance; the influence of fault state and the deviation that produces is bigger; protective device can't be determined the line level fragment position of fault origination point exactly; take the corresponding protection mode; even can produce the 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 fault under different running method and failure condition of a section of same protective device monitoring differs greatly; then can't accurately determine protection range with the size of electric values; can only to protections at different levels different deferred action values be set by road along the line and realize the cascade protection of delaying time; like this, the above track section of tail end line all loses the quick-break main protection.Therefore, the protection of multistage short-term road system can not realize fast tripping protection completely owing to can only adopt the method for classification cumulative delay action, causes the protection disappearance.And, when protection progression when 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 big, can't satisfy the requirement of rapidity of relay protection, and expansion causes the accident; If guaranteed the rapidity of head end; then delay time is too short; less than the intrinsic operate time of protective device and switch; the delay time of back first class of protection device can't be avoided the operate time of previous stage protective device; can't guarantee the selectivity of terminal action; can take place all to start the protection tripping operation, cause the overstep tripping accident.
The second class guard method is because protective device needs the electric parameters at alternative route two ends; be only applicable to the protection in one section circuit; can only judge in the protection range whether fault occur in its protective device; and can not judge the outer fault section of the protection range that occurs in its protective device at interval apart from the section of this protective device, take more fully multistage backup protection.And the electrical data of transmission is many, the time segment length, the influence 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, the protective device complex structure, the electric parameters at transmission lines two ends need be provided with guide wire, high-frequency apparatus, microwave equipment, and equipment investment is big, so only be applied on the 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 takes place, thereby determine the protection range and the protected mode of protective relaying device, cause supply line's protection disappearance and the malfunction protection tripping operation 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, to realize accurately determining supply line's relaying protection scope, in time to take corresponding the means of relay protection.
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, carry out according to following step:
One, the self-powered line power port of export is to the terminal power supply section of dividing; It in the supply line power supply section; Being positioned at the supply line that the terminal circuit breaker of supply line controls is one-level power supply section; Between the terminal circuit breaker of the supply line circuit breaker adjacent, be secondary power supply section, analogize to the power outlet end successively and divide the power supply section with close power outlet end;
The protective relaying device communication interface of the circuit breaker of each the power supply section that two, will divide realizes communicating to connect by wired or wireless network;
Three, described each protective relaying device sends the fault-signal that have identity code by described wired or wireless communication network to the protective relaying device of the section of respectively powering of close power outlet end with detected fault message respectively;
Four, receive that the protective relaying device of fault-signal is respectively according to the definite position that sends the protective relaying device of this fault-signal of the identity code of fault-signal; and determine the power supply section that fault takes place according to the position of distance power outlet end protective relaying device farthest; the power supply section that takes place according to fault and its definite relaying protection scope of having set of service area's hop count order separately then, and take the means of relay protection set according to the described relaying protection scope of having set.
Described relaying protection scope is: the protective relaying device of each grade power supply section is the nearly backup relaying of adjacent next stage power supply section away from the power outlet end; It simultaneously also is backup relaying far away away from the following secondary power supply section of power outlet end.
Described wired or wireless communication network and power supply monitoring device communicate to connect; Described each protective relaying device detected fault message separately sends the fault-signal that has identification to described power supply monitoring device; the signal of each protective relaying device that power supply monitoring device basis is received is determined the protected mode of each protective relaying device, and sends signal instruction to take corresponding the means of relay protection to each protective relaying device.
Described each protective relaying device compares the judgement back regularly to described power supply monitoring device transmission with electric parameters and the setting value of gathering; The power supply monitoring device has the identification signal and can judge whether operate as normal of described wired or wireless communication network and each protective relaying device according to what each protective relaying device that receives sent
The invention has the advantages that the section position that the accurately definite fault of the fault-signal of gathering according to the protective relaying device in the supply line takes place, and the 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 all has main protection and multistage backup protection; do not need the protection delay time that adds up step by step; therefore the protection disappearance can not appear; prevent the bypassing the immediate leadership of protective relaying device, protection range misoperation more, thereby simplified the relaying protection control and the protection setting method of supply line.
Description of drawings
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, at first the self-powered line power port of export is to the terminal power supply section of dividing; It in the supply line power supply section.As shown in Figure 1; the terminal circuit breaker DL1 bringing onto load D1 of institute is an one-level power supply section; when the 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 that has identity code (address code); protective relaying device B2 is to protective relaying device B3; B4 sends the fault-signal that has identity code (address code), and protective relaying device B3 sends the fault-signal that has identity code (address code) to protective relaying device B4.
Because detecting fault, protective relaying device B1 takes place; 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 is taked the 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 is the nearly backup relaying power supply section of protective relaying device B2, so protective relaying device B2 takes 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 a 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 is the backup protection power supply section far away of protective relaying device B3, and 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 a distal-most end protective relaying device of sending fault-signal; therefore can determine that fault occurs in one-level power supply section; power section 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 do not start protection according to the one-level of setting.
If this moment, protective relaying device B2 broke down; then protective relaying device B3 can not receive the fault-signal that protective relaying device B2 sends; can determine then that fault occurs in the main protection section of protective relaying device B1 and protective relaying device B2 hinders for some reason and loses protective capability; according to setting; protective relaying device B3 circuit breaker DL3 to the power supply section between the circuit breaker DL2; and circuit breaker DL2 merges into the nearly backup relaying power supply section of oneself to two between circuit breaker DL1 power supply sections; change nearly backup relaying mode into by backup relaying mode far away; 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 have backup relaying, the analogue of other protective relaying device by that analogy.
When the D2 point of the power supply section (secondary power supply section) of circuit breaker DL2 between circuit breaker DL1 breaks down; protective relaying device B1 can not detect fault data; and protective relaying device B2, B3, B4 detect fault data; at this moment; 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 takes place because of not detecting fault, does not start 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 the 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 a 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 a 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 the circuit breaker DL1; according to setting, protective relaying device B4 takes backup relaying mode far away.
If certain protective relaying device breaks down when losing protective capability in the supply line; as previously mentioned; the protective relaying device of the last power supply section that breaks down can be merged into two power supply sections the power supply protection section of oneself; automatically replace the fault protective relaying device to shoulder the defencive function of fault protective relaying device; therefore, the power supply section protected of fault protective relaying device still can obtain relaying protection under failure condition.
As shown in Figure 2, also described wired or wireless communication network and power supply monitoring device can be communicated to connect; Each protective relaying device detected fault message separately sends the fault-signal that has identity code (address code) to described power supply monitoring device; the signal of each protective relaying device that power supply monitoring device basis is received is determined the protected mode of each protective relaying device, and sends signal instruction to take corresponding the means of relay protection to each protective relaying device.
Claims (4)
1. supply line's relay protecting method based on communication network is characterized in that:
One, the self-powered line power port of export is to the terminal power supply section of dividing; It in the supply line power supply section; Being positioned at the supply line that the terminal circuit breaker of supply line controls is one-level power supply section; Between the terminal circuit breaker of the supply line circuit breaker adjacent, be secondary power supply section, analogize to the power outlet end successively and divide the power supply section with close power outlet end;
The protective relaying device communication interface of the circuit breaker of each the power supply section that two, will divide realizes communicating to connect by wired or wireless network;
Three, described each protective relaying device sends the fault-signal that have identity code by described wired or wireless communication network to the protective relaying device of the section of respectively powering of close power outlet end with detected fault message respectively;
Four, receive that the protective relaying device of fault-signal is respectively according to the definite position that sends the protective relaying device of this fault-signal of the identity code of fault-signal; and determine the power supply section that fault takes place according to the position of distance power outlet end protective relaying device farthest; the power supply section that takes place according to fault and its definite relaying protection scope of having set of service area's hop count order separately then, and take the means of relay protection set according to the described relaying protection scope of having set.
2. according to the described supply line's relay protecting method based on communication network of claim 1, it is characterized in that: described relaying protection scope is: the protective relaying device of each grade power supply section is the nearly backup relaying of adjacent next stage power supply section away from the power outlet end; It simultaneously also is backup relaying far away away from the following secondary power supply section of power outlet end.
3. according to claim 1 or 2 described supply line's relay protecting methods based on communication network, it is characterized in that: described wired or wireless communication network and power supply monitoring device communicate to connect; Described each protective relaying device detected fault message separately sends the fault-signal that has identification to described power supply monitoring device; the signal of each protective relaying device that power supply monitoring device basis is received is determined the protected mode of each protective relaying device, and sends signal instruction to take corresponding the means of relay protection to each protective relaying device.
4. according to the described supply line's relay protecting method based on communication network of claim 3, it is characterized in that: described each protective relaying device compares the judgement back regularly to described power supply monitoring device transmission with electric parameters and the setting value of gathering; The power supply monitoring device has the identification signal and can judge whether operate as normal of described wired or wireless communication network and each protective relaying device according to what each protective relaying device that receives sent.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| CN102185298B CN102185298B (en) | 2014-03-19 |
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Cited By (6)
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|---|---|---|---|---|
| CN102510048A (en) * | 2011-10-27 | 2012-06-20 | 深圳市华力特电气股份有限公司 | Anti-override trip protection system |
| CN102882192A (en) * | 2012-06-29 | 2013-01-16 | 刘联和 | Technical method for relay protection of ''logic identification point protection group of 0 and 1 statuses'' of electrical substation |
| CN103078289A (en) * | 2012-06-29 | 2013-05-01 | 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 |
| CN112260241A (en) * | 2020-12-21 | 2021-01-22 | 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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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102510048A (en) * | 2011-10-27 | 2012-06-20 | 深圳市华力特电气股份有限公司 | Anti-override trip protection system |
| 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 |
| CN102882192A (en) * | 2012-06-29 | 2013-01-16 | 刘联和 | Technical method for relay protection of ''logic identification point protection group of 0 and 1 statuses'' of electrical substation |
| CN103078289A (en) * | 2012-06-29 | 2013-05-01 | 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 |
| 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 |
| 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 |
| CN112260241A (en) * | 2020-12-21 | 2021-01-22 | 中国电力科学研究院有限公司 | Protection device, pilot protection method and pilot protection system |
| 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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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 |