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Method and device for false closing test of power module bypass switch of flexible DC converter valve

A flexible DC and power module technology, applied in the direction of circuit breaker testing, etc., can solve the problem of damage to the power module of the flexible DC converter valve

Active Publication Date: 2021-12-14
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there is no research on the false closing test of the power module bypass switch of the flexible DC converter valve in the prior art, but the inventors found that when the bypass switch of the power module of the flexible DC If the protection measures are not effective, the power module of the flexible DC converter valve will be damaged. Therefore, a test method for the bypass switch of the power module of the flexible DC converter valve is provided to verify whether the protection measures for the power module of the flexible DC converter valve are effective. It is a technical problem that needs to be solved urgently

Method used

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  • Method and device for false closing test of power module bypass switch of flexible DC converter valve
  • Method and device for false closing test of power module bypass switch of flexible DC converter valve
  • Method and device for false closing test of power module bypass switch of flexible DC converter valve

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Embodiment 1

[0028] see figure 2 , image 3 , figure 2 It is the schematic diagram of the bypass switch misconnection test of the flexible DC converter valve power module, where IGBT1 and IGBT2 are insulated gate bipolar transistors, S1 is the bypass switch, R1 is the voltage equalizing resistor, D1 and D2 are diodes, and C1 for the capacitor, image 3 The flow diagram of the test method for the bypass switch of the flexible DC converter valve power module bypass switch provided by the embodiment of the present invention includes:

[0029] S1. Charge the voltage of the capacitor C1 of the flexible DC converter valve power module to a pre-designed test voltage, which is not lower than the highest voltage when the bypass switch is mistakenly closed in the actual working condition and causes a direct short circuit .

[0030] S2. When the power module of the flexible DC converter valve is running normally, trigger the conduction of the IGBT1 of the flexible DC converter valve power modul...

Embodiment 2

[0039] An embodiment of the present invention provides a flexible DC converter valve power module bypass switch mis-closing test device including a controller, the controller is configured to:

[0040] Charging the capacitor voltage of the flexible DC converter valve power module to a pre-designed test voltage, the test voltage is not lower than the highest voltage when the bypass switch is closed by mistake in actual working conditions and causes a direct short circuit;

[0041] When the flexible DC converter valve power module is operating normally, the flexible DC converter valve power module IGBT1 is triggered to be turned on at time t1, and the bypass switch is triggered to be closed incorrectly at time t2;

[0042] When the signal of false closing of the bypass switch is collected, through the bridge arm through protection function of the IGBT1, before the closing action of the bypass switch is completed, a blocking signal is sent to the IGBT1, and a reissued The bypass sw...

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Abstract

The present invention provides a method and device for testing the bypass switch of a flexible DC converter valve power module bypass switch. The method includes: charging the capacitor voltage of the power module of the flexible DC converter valve to a pre-designed test voltage; When the valve power module is running normally, the IGBT1 of the flexible DC converter valve power module is triggered at time t1, and the bypass switch is triggered to close incorrectly at time t2; Arm straight-through protection function, before the closing action of the bypass switch is completed, a blocking signal is sent to IGBT1, and the trigger signal of the bypass switch is reissued at the same time; after IGBT1 is turned off after the dead time, it will trigger IGBT2 to conduct; If the power module of the DC converter valve has a through discharge, the protection measures for the power module of the flexible DC converter valve are effective, otherwise they are invalid. Through this test, it can be verified whether the protective measures for the power module of the flexible DC converter valve are effective when the bypass switch is closed by mistake.

Description

technical field [0001] The invention relates to the technical field of flexible direct current transmission, in particular to a method and device for testing a bypass switch of a power module of a flexible direct current converter valve. Background technique [0002] At present, there is no research on the false closing test of the power module bypass switch of the flexible DC converter valve in the prior art, but the inventors found that when the bypass switch of the power module of the flexible DC If the protection measures are not effective, the power module of the flexible DC converter valve will be damaged. Therefore, a test method for the bypass switch of the power module of the flexible DC converter valve is provided to verify whether the protection measures for the power module of the flexible DC converter valve are effective. It is a technical problem that needs to be solved urgently. Contents of the invention [0003] The purpose of the present invention is to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327
CPCG01R31/327
Inventor 杨柳周月宾许树楷
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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