Breaking test device and test method for high-voltage direct current breaker

A high-voltage direct current, test device technology, applied in the direction of circuit breaker testing, etc., can solve the problems of ineffective equivalent circuit breaker thermal stress recovery overvoltage, poor versatility, etc., to achieve superior equivalence, comprehensive functions, and low construction costs Effect

Active Publication Date: 2016-07-27
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-voltage DC circuit breakers are still at the cutting-edge technology in the field of power electronics. At present, only two multinational companies, ABB and ALSTOM, have completed the development of high-voltage DC circuit breaker prototypes. The test methods are highly confidential and there are few literature repor...

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  • Breaking test device and test method for high-voltage direct current breaker
  • Breaking test device and test method for high-voltage direct current breaker
  • Breaking test device and test method for high-voltage direct current breaker

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Embodiment Construction

[0026] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0027] figure 1 HVDC circuit breaker topology, (a) is the topological diagram of HVDC circuit breaker, (b) is the topological structure diagram of the full bridge module test device, the HVDC circuit breaker includes parallel mechanical switch-full bridge module unit branch, full bridge module unit branch and arrester MOV; the mechanical switch-full bridge module unit branch is composed of a mechanical switch K and a full bridge module unit in series; the full bridge module unit branch is composed of a series connected full bridge module unit; the full bridge module The unit is composed of two phases and four bridge arms, and a capacitor C is connected in parallel between the two phases, and a resistor is connected in parallel at both ends of the capacitor C; each bridge arm is composed of an IGBT and a freewheeling diod...

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Abstract

The invention relates to a breaking test device and test method for a high-voltage direct current breaker. A reactor L of the device is connected in series with the high-voltage direct current breaker and then separately connected in parallel with a high-voltage circuit and a low-voltage circuit; a bypass switch is connected in parallel to two ends of the high-voltage direct current breaker; and a protection thyristor is connected in parallel to two ends of a full-bridge module in a mechanical switch-full-bridge module branch. In the test method, rated current from a low-voltage high-current source is injected to the breaker via a thyristor isolating valve; a capacitor is charged by a high-voltage low-current source, initial test voltage is established, the high-voltage circuit is discontinuously triggered by spark, the test current is adjusted by the reactor and then injected into the breaker, the thyristor isolating valve is switched off, breaking is accomplished when the expected breaking current or the maximum breaking time arrives, and the breaker tolerates transient recovery overvoltage and residual voltage of the capacitor in the high-voltage circuit. The device and the method can reproduce current, voltage and thermal stress of the high-voltage direct current breaker in practical operation, are high in test equivalence, and have the capability of reliably detecting the breaking performance of the breaker.

Description

technical field [0001] The invention relates to a test device and a test method for a DC circuit breaker, in particular to a breaking test device and a test method for a high-voltage DC circuit breaker. Background technique [0002] With the application of multi-terminal flexible DC and DC grid technology based on voltage source converter (VSC), fast high-voltage DC circuit breaker has become one of the key equipment to ensure the stable, safe and reliable operation of the system, and its operation reliability directly determines all To configure the safety and economy of the DC system, it is necessary to conduct a comprehensive test to detect the performance of the high-voltage DC circuit breaker, and the breaking capacity of the circuit breaker is one of the most important properties. High-voltage DC circuit breakers are still at the cutting-edge technology in the field of power electronics. At present, only two multinational companies, ABB and ALSTOM, have completed the d...

Claims

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Application Information

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IPC IPC(8): G01R31/327
Inventor 魏晓光贺之渊査鲲鹏周万迪高冲张升陈龙龙
Owner STATE GRID CORP OF CHINA
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