Flexible direct-current converter valve power module bypass switch false switching-on test method and circuit
A bypass switch and power module technology, applied in the field of bypass switch mis-closing test of flexible DC converter valve power module, can solve problems such as damage of flexible DC converter valve power module
Active Publication Date: 2021-09-17
ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD +2
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- Application Information
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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
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Embodiment 1
[0038] see figure 1 and figure 2 , figure 1 This is the circuit diagram of the bypass switch mis-closing test of the flexible DC converter valve power module provided in this embodiment; figure 2 This is the circuit diagram for the mis-closing test of the bypass switch of the power module of the flexible DC converter valve provided in this embodiment. figure 1 The shown test circuit for bypass switch mis-closing of the flexible DC converter valve power module includes:
[0039] S1. When testing the first insulated gate bipolar transistor T1, send a turn-on command to the first insulated gate bipolar transistor T1 through the main controller, so that the current flows from the first insulated gate bipolar transistor to the load reactance X,, load current is generated at both ends of load reactance X;
[0040] S2. When it is detected that the first insulated gate bipolar transistor T1 passes through, a trigger signal is sent through the bypass switch closing controller to ...
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The invention provides a flexible direct current converter valve power module bypass switch false switching-on test method and circuit, the method is suitable for the circuit, and the method comprises the following steps: when a first insulated gate bipolar transistor is tested, a main controller sends a switching-on instruction to the first insulated gate bipolar transistor, the current flows to a load reactor from the first insulated gate bipolar transistor, and load current is generated at the two ends of the load reactor; when it is detected that the current flows through the first insulated gate bipolar transistor, a trigger signal is sent through a bypass switch closing controller to simulate and trigger false closing of the first bypass switch; and when the power module controller detects the trigger signal, protection is started, and the first insulated gate bipolar transistor is turned off to prevent the first insulated gate bipolar transistor and the first bypass switch from generating straight-through short circuit. By implementing the embodiment of the invention, whether the protection measures of the flexible direct current converter valve power module are effective or not when the bypass switch is mistakenly switched on in the normal operation process of the flexible direct current converter valve power module can be verified.
Description
technical field [0001] The invention relates to the technical field of flexible direct current power transmission, in particular to a test method and circuit for mis-closing of a bypass switch of a power module of a flexible direct current converter valve. Background technique [0002] At present, there are few studies on the mis-closing test of the bypass switch of the power module of the flexible DC converter valve in the prior art. In the research and practice, the inventor found that when the bypass switch of the flexible DC converter valve power module is incorrectly closed, if the protection measures of the flexible DC converter valve power module are ineffective, the power module of the flexible DC converter valve will be damaged. A flexible DC converter valve power module bypass switch mis-closing test circuit and test method to verify whether the protection measures of the flexible DC converter valve power module are effective are technical problems that need to be ...
Claims
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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