Test circuit used for high-voltage DC circuit breaker submodule

Abstract

The invention relates to a test circuit used for a high-voltage DC circuit breaker submodule. The test circuit comprises a controller, a controlled voltage source and a voltage control circuit, wherein the voltage control circuit is used for loading a positive voltage and a negative voltage to both ends of a main loop in the high-voltage DC circuit breaker submodule separately, the controller controls and is connected with the controlled voltage source, and the controlled voltage source is in power supply connection with the voltage control circuit. According to the test circuit, when an electrical path of the DC circuit breaker submodule needs to be tested, the main loop of the DC circuit breaker submodule is connected with the voltage control circuit of the test circuit, a command is issued to the controller, the controller controls the voltage source to output a voltage, the voltage is used for conducting forward power supply and reverse power supply to the main loop in the submodule by means of the voltage control circuit, a capacitor in the submodule establishes an expected voltage when the main loop in the submodule is not conducted, whether the electrical path of the submodule is qualified or not can be judged by measuring a voltage at the capacitor end of the submodule, and the test circuit has the advantages of short detection process, high efficiency, low cost and fast detection speed.

Description

technical field [0001] The invention relates to a test circuit for a sub-module of a high-voltage direct current circuit breaker, and belongs to the technical field of automatic test equipment. Background technique [0002] A high-voltage DC circuit breaker is a switchgear that closes or disconnects the DC load current according to the DC transmission operation mode and fault handling requirements. Usually, a DC circuit breaker equipment is composed of multiple identical sub-modules in series. In the process of producing a DC circuit breaker, it is necessary to conduct a comprehensive inspection of the performance of each sub-module, which is a very heavy workload. Huge job. [0003] Usually, high-voltage DC sub-modules are manually inspected. This inspection method is costly and inefficient. Within the limited construction period, it will pose a severe challenge to the company to deliver orders on time. Moreover, since the sub-module topology of the HVDC circuit breaker i...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a test circuit for high-voltage DC circuit breaker sub-modules, which is used to solve the problems of low efficiency and heavy workload of manual detection of high-voltage DC sub-modules

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