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Testing device of high voltage direct current circuit breaker full bridge module and testing method thereof

A test device, high-voltage DC technology, applied in circuit breaker testing and other directions, can solve problems such as the inability to meet the overvoltage tolerance of full-bridge modules, and achieve the effects of flexible and adjustable breaking current amplitude, low test capacity and simple structure

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

AI Technical Summary

Problems solved by technology

This test method cannot meet the initial condition that the capacitor voltage in the full-bridge module is zero and the full-bridge module withstands overvoltage after equivalent breaking

Method used

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  • Testing device of high voltage direct current circuit breaker full bridge module and testing method thereof
  • Testing device of high voltage direct current circuit breaker full bridge module and testing method thereof
  • Testing device of high voltage direct current circuit breaker full bridge module and testing method thereof

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Embodiment Construction

[0020] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0021] The invention of the present application is mainly aimed at the test method of the full-bridge module of the new high-voltage DC circuit breaker.

[0022] figure 1 It is a high-voltage DC circuit breaker topology and the full-bridge module unit it contains. The full-bridge module is composed of 4 IGBTs and 1 capacitor. figure 2 It is the topological structure of the full-bridge module test device, consisting of a charging circuit, a capacitor C1, a reactor L, a full-bridge module unit, an energy absorber Rz and a thyristor T; the capacitor C1 is connected in parallel at both ends of the charging circuit; the reactor One end of L is connected to one end of capacitor C1 and the positive pole of the charging circuit, and the other end is connected to the midpoint of one of the upper and lower bridge arms of the ful...

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Abstract

The invention relates to a test device and a test method for a full-bridge module of a high-voltage DC circuit breaker. The test device includes a charging circuit, a capacitor C1, a reactor L, a full-bridge module unit, an energy absorber Rz, and a thyristor T; wherein the charging circuit includes DC charging power supply, current limiting resistor R, isolation switch K, discharge resistor R off , Release switch K2. The test method charges the low-voltage large capacitor through the DC power supply. After the completion, the thyristor triggers the test circuit. The test current is injected into the full-bridge module after being adjusted by the reactance. When the expected breaking current or the maximum breaking time is reached, the breaking is completed. Energy absorbers absorb and limit overvoltages. The topology of the test circuit is simple, the control is simple, the test capacity is low, the test current is large, the breaking current amplitude and di / dt are flexible and adjustable, the test equivalent is high, and it has the ability to comprehensively test the design rationality and operational reliability of the full-bridge module unit ability.

Description

technical field [0001] The invention relates to a test device and a test method thereof, in particular to a test device and a test method of a full-bridge module of a high-voltage direct current 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. As the basic unit of the high-voltage DC circuit breaker, the full-bridge module determines the performance of the high-voltage DC circuit breaker by its operating performance, so it is necessary to carry out tests on it. High-voltage DC circuit breakers still belong to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/327
Inventor 周万迪高冲高阳张升杨兵建王成昊
Owner STATE GRID CORP OF CHINA
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