Power system fault reappearing method

Abstract

The invention discloses a power system fault reappearing method, and compared with the prior art. The power system fault reappearing method can perform fault reappearing on all protection and safety automatic devices installed in a power plant/transformer substation at a time, can quickly find out fault causes, saves manpower and time, and is high in efficiency and low in cost. The matching relation between different protection and automatic devices can be detected, various problems possibly existing in the system can be found, and systematicness and comprehensiveness are high; and the method is simple to operate, has low requirements for the skill level of personnel, has high operability, and has popularization and application values.

Description

Technical field [0001] The present invention relates to a power failure detection technology, and particularly relates to an electric power system fault reproducing method. Background technique [0002] In recent years, domestic and international power system spate of blackout, such as the 2003 increase of 8.14 US blackout, 2021, Texas Blackouts and so on. These accidents are not caused by a single cause, the reason the following categories: power system design is unreasonable, protection and automatic safety devices flawed principle, to protect the value unreasonable, flawed secondary circuit protection, equipment maintenance not in place. [0003] For power system failure or abnormal occurrence, especially some of the larger impact of the presence of the protective devices or incorrectly accident, requires in-depth to find the cause of failure, failure to reproduce the development process, the accident panorama of the deduction for accident analysis provide technical support in...

AI Technical Summary

Problems solved by technology

[0004] At present, power system fault reproduction usually adopts the method of importing the fault waveform in Comtrade format into the RTDS real-time digital simulation system, and then connecting the RTDS to the relay protection tester, and inputting each analog quantity into the protection and safety automatic device for simulation reproduction, which has the following disadvantages : (1) Only a single protection device can reproduce the fault at a time, which is time-consuming and labor-intensive, and the efficiency is low; (2) All the protection devices in the power plant / substation cannot be reproduced at the same time. For multiple fault points or defects The situation cannot be verified, nor can it verify the action coordination relationship between different protection and safety automatic devices, and the overall system is insufficient.

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