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Method for realizing short-circuit test between pole lines of converter valve by using high-speed power electronic switch

A power electronic switch and short-circuit test technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve the problem of long closing and opening action time, which cannot meet the precise control, closing and opening of the short-circuit current test duration Problems such as poor action time consistency, to achieve the effect of no operating overcurrent, large capacity, and fast turn-on

Active Publication Date: 2015-12-09
CHINA XD ELECTRIC CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In previous similar test methods, fusible fuses or large-capacity switches were generally used to control the opening and closing of short circuits. The consistency of the gate action time is poor, and it cannot meet the precise control of the duration of the short-circuit current test

Method used

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  • Method for realizing short-circuit test between pole lines of converter valve by using high-speed power electronic switch
  • Method for realizing short-circuit test between pole lines of converter valve by using high-speed power electronic switch
  • Method for realizing short-circuit test between pole lines of converter valve by using high-speed power electronic switch

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Embodiment Construction

[0018] Below in conjunction with embodiment the invention is described in further detail.

[0019] The present invention utilizes the back-to-back loop test system of the flexible direct current transmission to carry out the short-circuit test between the pole lines of the converter valve, such as image 3 As shown, the flexible DC transmission back-to-back loop test system is composed of a converter station A and a converter B station, the converter A station is a rectifier station, the converter B station is an inverter station, two converter stations Connect the transformer, the high-voltage circuit breaker Q0 and the high-voltage switchgear to the high-voltage wires respectively, connect the DC bus between the two converter stations, and install a high-speed power electronic switch L for controlling the short circuit of the DC bus on the DC bus; two converter stations The device station is composed of 24 valve assemblies. One valve assembly is composed of 2 power modules. ...

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Abstract

The invention provides a method for realizing short-circuit test between pole lines of a converter valve by using a high-speed power electronic switch. By using a high-speed power electronic switch to carry out breaking and closing in the operation process between the positive and negative electrodes at the direct-current side of a back-to-back converter valve, the duration of short-circuit current in a loop can be controlled accurately, and on-off of short-circuit current test between the positive and negative electrodes at the direct-current side of a flexible direct-current power transmission converter valve is realized. Under the condition that thyristor-level energy taking and synchronous pulse control are solved, the purpose of controlling the duration of short-circuit current in the loop in an efficient, reliable, large-capacity and accurate manner is achieved by using a thyristor assembly as a high-speed power electronic switch.

Description

technical field [0001] The invention relates to a method for realizing a short-circuit test by a high-speed power electronic switch, in particular to a method for realizing a short-circuit test between pole lines of a converter valve by a high-speed power electronic switch. Background technique [0002] As high-power high-voltage insulated-gate bipolar transistor (IGBT) valve technology devices that can be turned off begin to be applied to DC transmission, it marks the birth of the third-generation DC transmission technology. This technology is suitable for both small-capacity power transmission and large-capacity power transmission. With the increase of flexible direct current transmission projects worldwide, flexible direct current transmission technology is developing rapidly, and the voltage is getting higher and higher, and the current and capacity are getting larger and larger in actual projects. How to realize the equivalent full-capacity test that simulates the same...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 苟锐锋行鹏马宇古俊红胡宇陈明涛田行靳駪
Owner CHINA XD ELECTRIC CO LTD
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