Flexible DC converter valve power module bypass switch mis-close test method and circuit
A bypass switch and power module technology, which is applied in the field of bypass switch mis-closure test of the power module of the flexible DC converter valve, can solve problems such as damage to the power module of the flexible DC converter valve
Active Publication Date: 2022-04-12
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +2
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Problems solved by technology
The inventor found in research practice that when the bypass switch of the power module of the flexible DC converter valve is closed incorrectly, if the protection measures for the power module of the flexible DC converter valve are not effective, the power module of the flexible DC converter valve will be damaged. A flexible DC converter valve power module bypass switch misconnection test circuit and test method to verify whether the protection measures for the flexible DC converter valve power module are effective is a technical problem that needs to be solved urgently
Method used
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Embodiment 1
[0038] see figure 1 and figure 2 , figure 1 It is the circuit diagram of the bypass switch mis-close test of the power module of the flexible DC converter valve provided in this embodiment; figure 2 It is the circuit diagram of the bypass switch mis-closing test of the power module of the flexible DC converter valve provided in this embodiment, and a test method for the mis-closing of the bypass switch of the power module of the flexible DC converter valve provided by the embodiment of the present invention is applicable to figure 1 The shown flexible DC converter valve power module bypass switch mis-close test circuit includes:
[0039] S1. When testing the first IGBT T1, send a turn-on command to the first IGBT T1 through the main controller, so that the current flows from the first IGBT to the load reactance X,, the load current is generated at both ends of the load reactance X;
[0040] S2. When it is detected that the first IGBT T1 is passing through, a trigger sign...
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The present invention provides a method and circuit for testing the bypass switch of a flexible direct current converter valve power module. sending a turn-on instruction to the first IGBT, so that the current flows from the first IGBT to the load reactance, and a load current is generated at both ends of the load reactance; when it is detected that the first IGBT is flowing, The trigger signal is sent by the bypass switch closing controller to simulate the false closing of the first bypass switch; when the power module controller detects the trigger signal, it starts protection and turns off the first insulated gate bipolar transistor to prevent A direct short circuit occurs between the first IGBT and the first bypass switch. The implementation of the embodiment of the present invention can verify whether the protection measures for the power module of the flexible DC converter valve are effective when the bypass switch is closed incorrectly during normal operation of the power module of the flexible DC converter valve.
Description
technical field [0001] The invention relates to the technical field of flexible direct current transmission, in particular to a method and circuit for testing a bypass switch of a power module of a flexible direct current converter valve. Background technique [0002] At present, there is little research on the mis-closure test of the bypass switch of the power module of the flexible DC converter valve in the existing technology. The inventor found in research practice that when the bypass switch of the power module of the flexible DC converter valve is closed incorrectly, if the protection measures for the power module of the flexible DC converter valve are not effective, the power module of the flexible DC converter valve will be damaged. A flexible direct current converter valve power module bypass switch misconnection test circuit and test method to verify whether the protection measures for the flexible direct current converter valve power module are effective are techn...
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IPC IPC(8): G01R31/00G01R31/327
CPCG01R31/003G01R31/327
Inventor 杨柳余琼周月宾周见豪许树楷易荣
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD