Relay protection action behavior intelligent evaluation method and system

Abstract

The invention provides a relay protection action behavior intelligent evaluation method and system. The method comprises the steps of acquiring and preprocessing fault event information; analyzing the preprocessed information data, and generating a data chain table; calling data in the data chain table for calculation to obtain the characteristic quantity of each required parameter; according to the characteristic quantity, in combination with the relay protection action condition, calling a pre-constructed expert rule module to carry out identification and judgment; identifying and judging events, analyzing and evaluating action behaviors of relay protection in the events according to identification and judgment results, pushing the events which cannot be automatically identified and judged to manual auditing, and updating and perfecting a knowledge base in an expert rule module for the events. According to the method, full coverage of analysis and evaluation of the protection action behaviors of the power system is realized, the protection action events do not need to be graded according to the influence degree, the requirements on knowledge and experience of auditing personnel are effectively reduced, and the processing pertinence and efficiency of field defects are improved.

Description

technical field [0001] The invention relates to the technical field of power system relay protection analysis, in particular to an intelligent evaluation method and system for relay protection action behavior. Background technique [0002] For the power system, its failure is almost inevitable. In the face of the failure of the power system, there will be a large number of protection action events, especially in the event of severe weather such as thunderstorms. Thousands of protection action events. However, at present, the evaluation of relay protection action behavior by various network provincial companies is still highly dependent on manual synthesis of various action signals, switch opening and closing information, and fault recordings for post-accident analysis, and no systematic and perfect intelligent analysis has yet been established. mechanism. [0003] At present, the following methods are used to evaluate the action behavior of relay protection: [0004] From...

AI Technical Summary

Problems solved by technology

[0008] 1. The classification strategy of the system for protection events is relatively simple, the granularity is too large, and the principle and coordination logic of relay protection devices are very complicated. In some complex working conditions, incorrect protection action events may be misjudged as Class III events, while Beyond manual review, it is difficult to achieve full coverage of human analysis and evaluation of massive protection actions;

[0009] 2. Most of the action behaviors of relay protection devices are correct and routine in practice, and the item-by-item review leads to a huge repetitive workload, which obviously causes a serious waste of human resources, and it is difficult to completely avoid errors caused by human factors. Judgments, missed judgments, burying hidden dangers for safe operation;

[0010] 3. In the case of incorrect protection action, it is necessary to manually synthesize multiple information to sort out and judge the cause of the incorrect action, which is inefficient and requires a high level of experience for personnel

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