Grid Fault Diagnosis System and Its Method Based on Relay Protection Auxiliary Decision-Making System

A technology for assisting decision-making and power grid faults. It is applied in fault location, information technology support system, and fault detection by conductor type. It can solve problems such as affecting the efficiency of auxiliary decision-making support for relay protection, weak protection device information, and increasing management burden. Achieve quick response to line faults, eliminate misjudgments and missed judgments of line faults, and complete analysis reports.

Active Publication Date: 2021-10-01
YUNNAN POWER GRID
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the Baoxin system consists of three levels: Baoxin master station, Baoxin sub-station and protection device. The manufacturers have various models, resulting in many communication links for Baoxin master station to obtain protection device information and poor data consistency, especially Baoxin master station automatically obtains protection device information. weaker
In addition, the three main station systems operate independently and do their own thing. Therefore, it is easy to generate information islands and increase management burden, and also affect the efficiency of auxiliary decision support for relay protection

Method used

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  • Grid Fault Diagnosis System and Its Method Based on Relay Protection Auxiliary Decision-Making System
  • Grid Fault Diagnosis System and Its Method Based on Relay Protection Auxiliary Decision-Making System
  • Grid Fault Diagnosis System and Its Method Based on Relay Protection Auxiliary Decision-Making System

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] Such as figure 1 As shown, the wave recording master station is hung with multiple wave recording devices, and the wave recording device collects disturbance information on the line. The disturbance information includes fault information and non-fault information, and sends the disturbance information to the wave recording master station. The wave recording master station Based on the analysis of the disturbance information, it is judged whether the disturbance information is fault information. If it is judged to be non-fault information, record the non-fault information; Such as image 3 As shown, the wave recording fault analysis report includes the name of the fault line, fault time, fault type, tripping time, reclosing time, fault distance measurement, and the changes of related voltage and current before and after the fault, the general protection action exit and the position change of the circuit breaker, etc. information. The biggest difference between it and t...

Embodiment 2

[0069] On the basis of Example 1, such as Figure 5 As shown, this embodiment provides the specific steps of S3:

[0070] S101. After the Baoxin master station receives the fault verification request from the wave recording master station, it matches the protection fault analysis report requested by the wave recording master station in the protection fault analysis report cache report organized by itself;

[0071] If the matching failure analysis report is successful, the Baoxin master station will send a confirmation report to the recording master station, and the confirmation report includes the protection failure analysis report selected after the matching is successful;

[0072] If the matching fault analysis report fails, Baoxin master station will send a denial report to the recording master station, and the denial report does not contain any protection fault analysis report;

[0073] S102. If the wave recording master station receives a denial report, it is determined ...

Embodiment 3

[0084] On the basis of Embodiment 2, this embodiment provides a specific matching process. In this embodiment, the matching means include a time-correlation method based on the fault moment, or a comparison method of initial wave head feature quantities.

[0085] Further preferably, the specific steps of the time-related method include: taking the failure time given by the wave recording master station as a benchmark, relaxing 15 seconds forward and backward respectively, generating a comparison time window, and looking for the cached report of the Baoxin master station within the time window If a unique report is found for the protection fault analysis report in , the matching is successful; otherwise, continue to use the characteristic quantity comparison method to find the report.

[0086] Further preferably, the specific steps of the initial wave head feature quantity comparison method include:

[0087] S201. Taking the failure time given by the wave recording master stat...

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Abstract

The invention proposes a power grid fault diagnosis system and its method based on relay protection auxiliary decision-making system, based on the wave recording master station, by establishing a limited information interaction mechanism, and integrating the reliable advantages of the trustworthy master station in judging line faults, it maximizes the The wave recording master station has the advantage of quick response to line faults, and at the same time makes up for the shortcomings of the lack of protection action component information in the wave recording fault analysis report, and finally realizes a high degree of automation for relay protection agencies, reliable line fault judgment, and complete analysis reports. The line fault decision-making information has the ability to replace the auxiliary decision-making process of relay protection agency personnel, and directly face the direct decision-making ability of the control agency; with the assistance of the Baoxin master station, the wave recording master station has completed the confirmation and correction of the wave recording fault analysis report, supplemented The information of the protective action components is obtained, the possibility of misjudgment and missed judgment of line faults is eliminated, and the ability of reliable analysis of line faults and automatic output of decision-making to the regulatory agency is provided.

Description

technical field [0001] The invention relates to the field of relay protection, in particular to a power grid fault diagnosis system and method thereof based on a relay protection auxiliary decision-making system. Background technique [0002] The existing decision-making methods of relay protection agencies mainly rely on the three master station systems of recording wave master station, Baoxin master station and traveling wave master station, which are respectively responsible for collecting wave recording information, protection action information and traveling wave ranging information, and summarizing them to relay protection Institutions, the personnel of the relay protection organization will summarize and sort out the information of the three main station systems and analyze the faults to form auxiliary decision-making for relay protection and provide support for the regulation and control institutions. [0003] Minor disturbances (faults and non-faults) on the transmi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086Y04S10/52
Inventor 游昊石恒初李本瑜陈剑平张琳波李银银赵明朱青成罗吉廖晓春徐志奇曾令森王慧琼
Owner YUNNAN POWER GRID
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