Optical fiber differential protection field simulation test system and method based on Beidou system

Abstract

The invention discloses an optical fiber differential protection field simulation test system and method based on a Beidou system. The system consists of a line local side test unit and an opposite side test unit, and each test unit internally comprises a Beidou communication module, a data simulation module and a data interface module. The Beidou communication module receives a satellite time tick message to realize clock synchronization, and interacts test control information and a test result with the opposite side test unit through a short message; the data simulation module simulates testvirtual data required by a protection device according to the input system operation parameters; and the data interface module outputs test sampling analog quantity and switch position information tothe protection device and collects tripping information output by the protection device at the same time. According to the invention, the problem that there is no systematic debugging technology of line optical fiber differential protection in a transformer substation site at present can be solved to meet the requirements of power system users for field detection of line protection devices.

Description

technical field [0001] The invention relates to the technical field of secondary equipment testing of power system substations, in particular to a system and method for on-site simulation testing of optical fiber differential protection based on the Beidou system. Background technique [0002] Optical fiber differential protection has high sensitivity, strong action, and can quickly and effectively remove faults in the area. It is the main protection method for high-voltage lines in power systems. With the continuous development of computer and communication technology, line optical fiber differential protection is widely used in power system, and the reliability of its protection device has always been a hot spot in the industry research. Optical fiber differential protection needs to obtain the electrical quantity information of the local side and the opposite side. Its action criteria involve various signals such as sampling values, switch positions, and status of the opp...

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Problems solved by technology

[0004] A field simulation test system and method for optical fiber differential protection based on the Beidou system proposed by the present invention can solve the lack of systematic debugging technology for line optical fiber differential protection at the substation site, and it is not easy to verify that the protection configuration is reasonable during on-site single debugging Inability to test the transmission link of the signal on the opposite side, cumbersome operation during synchronous timing debugging, test data not systematic, etc., to meet the needs of power system users for on-site testing of line protection devices

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