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Flexible direct-current converter valve power module bypass switch false switching-on test method and device

A flexible DC and power module technology, applied in circuit breaker testing and other directions, can solve problems such as damage to the power module of the flexible DC converter valve

Active Publication Date: 2021-05-28
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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  • Flexible direct-current converter valve power module bypass switch false switching-on test method and device
  • Flexible direct-current converter valve power module bypass switch false switching-on test method and device
  • Flexible direct-current converter valve power module bypass switch false switching-on test method and device

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Experimental program
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Effect test

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 as:

[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 invention provides a flexible direct-current converter valve power module bypass switch false switching-on test method and device. The method comprises the following steps of: charging a capacitor voltage of a flexible direct-current converter valve power module to a pre-designed test voltage; when the flexible direct-current converter valve power module operates normally, triggering the flexible direct-current converter valve power module IGBT1 to be conducted at the t1 moment, and triggering a bypass switch to be mistakenly switched on at the t2 moment; when a signal indicating that the bypass switch is switched on by mistake is collected, sending a blocking signal to the IGBT1 through a bridge arm direct connection protection function of the IGBT1 before the switching-on action of the bypass switch is completed, and meanwhile, sending a bypass switch trigger signal again; after the IGBT1 is switched off after a dead time, triggering the IGBT2 to be switched on; if it is detected that direct-through discharge occurs in the flexible direct-current converter valve power module, indicating that the protection measures of the flexible direct-current converter valve power module are effective, or else, the protection measures are ineffective. Through the test, whether the protection measures of the flexible direct-current converter valve power module are effective or not can be verified when the bypass switch is mistakenly switched on.

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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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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