CN113612204A - Circuit repeated fault judgment and power transmission auxiliary decision-making device and method - Google Patents
Circuit repeated fault judgment and power transmission auxiliary decision-making device and method Download PDFInfo
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- CN113612204A CN113612204A CN202110716966.5A CN202110716966A CN113612204A CN 113612204 A CN113612204 A CN 113612204A CN 202110716966 A CN202110716966 A CN 202110716966A CN 113612204 A CN113612204 A CN 113612204A
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- 238000005259 measurement Methods 0.000 claims abstract description 20
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- 208000025274 Lightning injury Diseases 0.000 abstract description 2
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency 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
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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Abstract
The invention discloses a circuit repeated fault judgment and power transmission auxiliary decision device and a method, wherein the method comprises the following steps: collecting position information of a circuit switch breaker in a power grid, line protection action information and fault distance measurement information of a power grid protection information system; when a line switch is tripped and the line protection corresponding to the line switch acts, acquiring a line protection fault distance measurement value and a protection action moment; when the line is judged to have multiple faults in a certain area in a short time, generating an early warning signal, and stopping power transmission of the line with repeated faults by a power grid dispatcher according to the early warning signal; and when the early warning signal time lasts for a period of time and no fault trip exists in the same area, sending an early warning release signal to prompt a dispatcher to transmit power to a corresponding line. The invention can effectively improve the power transmission success rate of dispatching personnel under natural disaster weather such as lightning stroke and the like and reduce the problem of repeated power transmission workload.
Description
Technical Field
The invention relates to the technical field of power grid operation management, in particular to a circuit repeated fault judgment and power transmission auxiliary decision-making device and method.
Background
In the operation of a power system, when a line protection action trips a switch and the switch is not successfully reclosed, a dispatcher can transmit power to the tripped line; when natural disasters such as lightning stroke and typhoon occur in a certain area, the conditions that the switch is frequently opened and closed again and again are unsuccessful occur in short time in line protection, and at the moment, a dispatcher operates a power transmission instruction for many times, so that the working strength of the dispatcher is increased, and the service life of an electric facility is also influenced. Therefore, it is necessary to invent a method for automatically determining whether a power line has a repeated fault within a certain time and a certain area, so as to assist a dispatcher in making a decision on power transmission of the power line.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a circuit repeated fault judgment and power transmission auxiliary decision-making device and method.
The purpose of the invention is realized by the following technical scheme:
a circuit repeated fault judgment and power transmission auxiliary decision method comprises the following steps:
step 2, when the circuit breaker position of the line switch is detected to be changed from closed position to open position and the line protection action signal corresponding to the line switch is changed from 0 to 1, obtaining the line protection fault distance measurement length L1 and the fault time T1, and setting a counter N to be 1;
step 3, when the circuit breaker position of the line switch is detected to be changed from closed position to open position and the line protection action signal corresponding to the line switch is changed from 0 to 1, obtaining the line protection fault distance measurement length L2 and the fault time T2;
step 4, comparing the time difference of the two detection, judging whether the two faults are faults at the same point or not, if the time difference is smaller than a preset time threshold value and the two faults are faults at the same point, accumulating the counter N, and if not, keeping the counter N unchanged;
step 5, when the counter N is larger than a preset frequency threshold value, starting timing by using an early warning prompting timer, generating a line repeated fault early warning signal, and stopping power transmission of a line with repeated faults by a power grid dispatcher according to the line repeated fault early warning signal;
and 6, when the timing of the early warning prompt timer is greater than a preset early warning time threshold value, generating a line repeated fault early warning removing signal, transmitting power to the line by a power grid dispatcher according to the line repeated fault early warning removing signal, and enabling the timing of the timer to return to zero.
Preferably, in step 4, the specific method for determining whether the two faults have the same fault point is as follows:
wherein L isN、LN+1The line fault distance measurement lengths are respectively two times before and after, if the inequality is established, the same point fault is judged, and if the inequality is not established, the same point fault is judged.
Preferably, the preset time threshold value ranges from 0.5 hour to 2 hours.
Preferably, the value range of the preset time threshold is 1 time to 3 times.
Preferably, the value range of the preset early warning time threshold is 2-6 hours.
A circuit repeated fault judgment and power transmission auxiliary decision-making device comprises:
an acquisition module: the system is used for acquiring the position information of a circuit breaker of a circuit switch in the power grid, the circuit protection action information of a power grid protection information system and fault distance measurement information;
a judging module: the system is used for judging repeated faults of the line according to the position information of the line switch breaker in the power grid, the line protection action information of the power grid protection information system and the fault distance measurement information;
the early warning module: outputting a line repeated fault early warning signal according to the line repeated fault information given by the judging module; and outputting a repeated fault early warning removing signal of the line according to the early warning prompt time duration.
A circuit repeated fault judgment and power transmission auxiliary decision device comprises a processor and a storage medium:
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 1 to 5.
The invention has the beneficial effects that: compared with the prior art, the method, the device and the storage medium for judging the repeated fault of the line and assisting the power transmission decision can automatically judge whether the repeated fault occurs in a certain area of the line in a short time and early warn dispatcher personnel, solve the problem of repeated power transmission of the line in a short time, effectively reduce the power transmission workload of the dispatcher personnel, improve the power transmission success rate of the line and have good power grid operation application value.
Drawings
FIG. 1 is a schematic flow diagram of the present invention.
Detailed Description
The invention is further described below with reference to the figures and examples.
Example (b):
a method for determining repeated line fault and assisting power transmission decision, as shown in fig. 1, includes the following steps
step 2, when the circuit breaker position of the line switch is detected to be changed from closed position to open position and the line protection action signal corresponding to the line switch is changed from 0 to 1, obtaining the line protection fault distance measurement length L1 and the fault time T1, and setting a counter N to be 1;
step 3, when the circuit breaker position of the line switch is detected to be changed from closed position to open position and the line protection action signal corresponding to the line switch is changed from 0 to 1, obtaining the line protection fault distance measurement length L2 and the fault time T2;
step 4, comparing the time difference of the two detection, judging whether the two faults are faults at the same point, if the time difference is less than 1 hour and the two faults are faults at the same point, accumulating the counter N, and if not, keeping the counter N unchanged;
step 5, when the counter N is equal to 2, starting timing by the early warning prompting timer, generating a line repeated fault early warning signal, and stopping power transmission of the line with repeated faults by a power grid dispatcher according to the line repeated fault early warning signal;
and 6, when the timing of the early warning prompt timer is more than 2 hours, generating a line repeated fault early warning removing signal, transmitting power to the line by a power grid dispatcher according to the line repeated fault early warning removing signal, and enabling the timing of the timer to return to zero.
In step 4, the specific method for judging whether the two faults are the same fault or not is as follows:
wherein L isN、LN+1The line fault distance measurement lengths are respectively two times before and after, if the inequality is established, the same point fault is judged, and if the inequality is not established, the same point fault is judged.
A circuit repeated fault judgment and power transmission auxiliary decision-making device comprises:
an acquisition module: the system is used for acquiring the position information of a circuit breaker of a circuit switch in the power grid, the circuit protection action information of a power grid protection information system and fault distance measurement information;
a judging module: the system is used for judging repeated faults of the line according to the position information of the line switch breaker in the power grid, the line protection action information of the power grid protection information system and the fault distance measurement information;
the early warning module: outputting a line repeated fault early warning signal according to the line repeated fault information given by the judging module; and outputting a repeated fault early warning removing signal of the line according to the early warning prompt time duration.
A circuit repeated fault judgment and power transmission auxiliary decision device comprises a processor and a storage medium:
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 1 to 5.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (7)
1. A circuit repeated fault judgment and power transmission auxiliary decision method is characterized by comprising the following steps:
step 1, collecting position information of a circuit switch breaker in a power grid, and collecting line protection action information and fault distance measurement information of a power grid protection information system;
step 2, when the circuit breaker position of the line switch is detected to be changed from closed position to open position and the line protection action signal corresponding to the line switch is changed from 0 to 1, obtaining the line protection fault distance measurement length L1 and the fault time T1, and setting a counter N to be 1;
step 3, when the circuit breaker position of the line switch is detected to be changed from closed position to open position and the line protection action signal corresponding to the line switch is changed from 0 to 1, obtaining the line protection fault distance measurement length L2 and the fault time T2;
step 4, comparing the time difference of the two detection, judging whether the two faults are faults at the same point or not, if the time difference is smaller than a preset time threshold value and the two faults are faults at the same point, accumulating the counter N, and if not, keeping the counter N unchanged;
step 5, when the counter N is larger than a preset frequency threshold value, starting timing by using an early warning prompting timer, generating a line repeated fault early warning signal, and stopping power transmission of a line with repeated faults by a power grid dispatcher according to the line repeated fault early warning signal;
and 6, when the timing of the early warning prompt timer is greater than a preset early warning time threshold value, generating a line repeated fault early warning removing signal, transmitting power to the line by a power grid dispatcher according to the line repeated fault early warning removing signal, and enabling the timing of the timer to return to zero.
2. The method for repeated fault determination and power transmission assistant decision-making of a line according to claim 1, wherein in the step 4, the specific method for determining whether two faults are the same fault is as follows:
wherein L isN、LN+1The line fault distance measurement lengths are respectively two times before and after, if the inequality is established, the same point fault is judged, and if the inequality is not established, the same point fault is judged.
3. The method according to claim 1, wherein the preset time threshold is set to a value ranging from 0.5 hour to 2 hours.
4. The method according to claim 1, wherein the preset threshold value ranges from 1 to 3 times.
5. The method for judging repeated faults of a line and assisting in power transmission decision-making according to claim 1, wherein the preset early warning time threshold value ranges from 2 hours to 6 hours.
6. A circuit repeated fault judgment and power transmission auxiliary decision device is characterized by comprising:
an acquisition module: the system is used for acquiring the position information of a circuit breaker of a circuit switch in the power grid, the circuit protection action information of a power grid protection information system and fault distance measurement information;
a judging module: the system is used for judging repeated faults of the line according to the position information of the line switch breaker in the power grid, the line protection action information of the power grid protection information system and the fault distance measurement information;
the early warning module: outputting a line repeated fault early warning signal according to the line repeated fault information given by the judging module; and outputting a repeated fault early warning removing signal of the line according to the early warning prompt time duration.
7. A circuit repeated fault judgment and power transmission auxiliary decision device is characterized by comprising a processor and a storage medium:
the storage medium is used for storing instructions;
the processor is configured to operate in accordance with the instructions to perform the steps of the method according to any one of claims 1 to 5.
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| CN202110716966.5A CN113612204B (en) | 2021-06-28 | 2021-06-28 | Line repeated fault judgment and power transmission auxiliary decision-making device and method |
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Citations (3)
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|---|---|---|---|---|
| KR19980020450A (en) * | 1996-09-09 | 1998-06-25 | 이종훈 | Expert guide for recovery of electrostatic system and its recovery guide |
| CN110867958A (en) * | 2019-11-08 | 2020-03-06 | 国网浙江省电力有限公司温州供电公司 | Automatic fault identification and alarm method for electric power system |
| CN111030058A (en) * | 2019-11-28 | 2020-04-17 | 南京国电南自电网自动化有限公司 | Power distribution network partition protection method based on 5G communication |
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- 2021-06-28 CN CN202110716966.5A patent/CN113612204B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19980020450A (en) * | 1996-09-09 | 1998-06-25 | 이종훈 | Expert guide for recovery of electrostatic system and its recovery guide |
| CN110867958A (en) * | 2019-11-08 | 2020-03-06 | 国网浙江省电力有限公司温州供电公司 | Automatic fault identification and alarm method for electric power system |
| CN111030058A (en) * | 2019-11-28 | 2020-04-17 | 南京国电南自电网自动化有限公司 | Power distribution network partition protection method based on 5G communication |
Non-Patent Citations (1)
| Title |
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| 施正钗;郑俊翔;周泰斌;徐伟敏;郑微;: "基于语义分析的设备监控告警信息知识图谱构建研究", 浙江电力, no. 08, 25 August 2020 (2020-08-25) * |
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