Method and device for testing turn-off characteristics of high power thyristor

A test device and characteristic test technology, applied in the field of power electronics, can solve problems such as unsatisfactory equivalence, and achieve the effect of large choice, flexible method and good test effect.

Active Publication Date: 2013-09-04
STATE GRID CORP OF CHINA +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, thyristor manufacturers' research on the turn-off characteristics of thyristors is limited to measuring the reverse recovery charge of thyristors. Although it can reflect the characteristics of thyristors, its equivalent is not ideal.

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  • Method and device for testing turn-off characteristics of high power thyristor

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Embodiment Construction

[0037] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0038] This embodiment mainly describes a high-power thyristor turn-off characteristic test method and its test device. The basic idea is to use two sets of power supply systems to provide constant operating current and reverse high voltage for the test thyristor respectively. During the test, the constant current source The output current and the voltage output by the high voltage source are alternately applied to the thyristor under test, so as to be equivalent to the turn-on and turn-off process of the thyristor in actual operation.

[0039] Specifically, a high-power thyristor turn-off characteristic testing device proposed in this embodiment has a schematic circuit diagram as shown in figure 1 Shown, specifically including constant current source G, current source G 1 , Test valve thyristor T, auxiliary valve thyri...

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PUM

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Abstract

The invention discloses a method and a device for testing the turn-off characteristics of a high power thyristor. The device comprises a constant current source, a voltage source, a sample valve thyristor T, an auxiliary valve thyristor T1 and an auxiliary valve thyristor T2, wherein the auxiliary valve thyristor T1 and the sample valve thyristor T are connected in series and then connected in parallel with the constant current source; the auxiliary valve thyristor T2 and the voltage source are connected in series and then connected in parallel with the constant current source; and a cathode of the voltage source is grounded. According to the method provided by the invention, two suits of power systems are adopted to provide the sample valve thyristor with constant operation current and reverse high voltage respectively; during a test, the current output by the constant current source and the voltage output by the high voltage source are alternately applied to the tested thyristor, so as to achieved the effect of being equivalent to the turn-on / turn-off process of the thyristor during the actual operation.

Description

technical field [0001] The invention belongs to the technical field of power electronics, and in particular relates to a method for testing the turn-off characteristics of a high-power thyristor and a testing device thereof. Background technique [0002] The improvement of thyristor capacity has extended its application to the field of power transmission. At present, the high-voltage direct current transmission technology based on high-voltage series thyristors is developing rapidly around the world, especially in my country, where it has been applied on a large scale, and has played a good technical advantage in long-distance power transmission and large-scale grid interconnection, and has achieved great success. Good economic benefits. With the improvement of DC transmission voltage and transmission capacity, the operation reliability of DC thyristor, the key equipment of DC transmission system, is very important to the safe operation of the system, and the turn-off charac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/26
Inventor 魏晓光陈争光雷小舟
Owner STATE GRID CORP OF CHINA
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