Test circuit used for high-voltage DC circuit breaker submodule

A high-voltage direct current and test circuit technology, which is applied in circuit breaker testing, instruments, and electrical measurement, can solve problems such as heavy workload and low efficiency of high-voltage direct current sub-modules, and achieve short detection procedures, solving time and efficiency problems, high efficiency effect

Active Publication Date: 2018-04-20
XJ ELECTRIC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Test circuit used for high-voltage DC circuit breaker submodule
  • Test circuit used for high-voltage DC circuit breaker submodule
  • Test circuit used for high-voltage DC circuit breaker submodule

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] Such as figure 1 As shown, the HVDC circuit breaker sub-module topology includes the first bridge arm, the second bridge arm, the parallel IGBT and the snubber circuit connected in parallel, where the first bridge arm is connected in series by the upper bridge arm diode D1 and the lower bridge arm diode D2 in the same direction Composition, the second bridge arm is composed of the upper bridge arm diode D3 and the lower bridge arm diode D4 connected in series in the same direction, the first bridge arm and the second bridge arm constitute a diode rectifier bridge; the parallel IGBT is composed of IGBT (T1) and IGBT (T2) It is composed of parallel connection in the same direction; a capacitor C and an anti-reverse diode D5 are arrang...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
CPCG01R31/3271
Inventor 范彩云胡学彬夏克鹏韩坤刘堃王昊午张志刚
Owner XJ ELECTRIC
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