Remote diagnosis method for motion behavior of protection element at dispatching terminal

Abstract

The invention discloses a remote diagnosis method for the motion behavior of a protection element at a dispatching terminal. The remote diagnosis method is characterized in that the method comprises following steps: S01: establishing an association model of primary equipment and relay protection; S02: transmitting and collecting relay protection intermediate logic node information, SOE information, protection motion information, telecommand deflection information, and fault record files from a substation to the dispatching terminal; S03: determining whether a power grid has faults; S04: determining a fault point via protection motion information, breaker deflection, and protection fault range-measuring information and obtaining association relay protection if the power grid has faults; S05: extracting intermediate logic node files of association relay protection; S06: comparing and analyzing each protection member according to self-consistency and consistency of each protection member and motion strategy; and S07: determining whether all the protection member motions are correct. According to the method, hidden problems of the protection members are discovered in advance, and necessary data is provided 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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