Remote Diagnosis Method of Action Behavior of Protection Components at Dispatch Terminal

Abstract

The invention discloses a remote diagnosis method for the action behavior of the protection element at the dispatching end, which is characterized in that it includes the following steps: S01: establish an association model between primary equipment and relay protection; S02: convert relay protection intermediate logical node information, SOE information, Protection action information, remote signal displacement information, and fault recording files are transmitted and collected from the substation end to the dispatch end; S03: Judge whether there is a fault in the power grid; S04: If there is a fault in the power grid, the system uses the protection action information, circuit breaker Position and protection fault ranging information to determine the fault point, and obtain the associated relay protection; S05: Extract the intermediate logical node file of the associated relay protection; S06: For each protection element according to the self-consistency and consistency, compare the action strategy, one by one Compare and analyze each protection element; S07: Determine whether all protection elements are operating correctly. Discover hidden problems in protection components in advance, and provide necessary data for remote operation and maintenance of relay protection.

Description

technical field [0001] The invention relates to a remote diagnosis method for the action behavior of a protection element at a dispatching end. Background technique [0002] The State Grid Corporation of China began to implement the construction policy of "integration of regulation and maintenance, and integration of operation and maintenance". The management mode of relay protection has undergone a fundamental change. and maintenance information involved less. In the smart grid dispatching system, the secondary equipment on-line monitoring and analysis module provides functions such as power supply voltage, temperature and humidity, light intensity collection, etc., but it still cannot meet the needs of remote operation and maintenance and relay protection at the dispatching end, especially for devices. Requirements for diagnosis and analysis of the action behavior of internal protection components. [0003] On the other hand, with the further improvement of dispatching i...

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Problems solved by technology

In the initial stage, SOE (record of events) signals and protection action signals were mainly used as data sources. Due to the lack of relevant information on protection logic functions, it was impossible to analyze the protection components inside the device. It was only possible to roughly evaluate the overall performance of the device, and it was impossible to confirm the internal protection Component Weakness

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