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Flexible DC converter valve power module bypass switch flow test method and device

A flexible DC and power module technology, which is applied in continuity testing, circuit breaker testing, etc., can solve problems such as affecting and damaging the power module of flexible DC converter valves, and achieve the effect of improving stability and reliability and solving intrinsic safety problems

Active Publication Date: 2022-02-22
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 bypass switch of the power module of the flexible DC converter valve in the existing technology, but the inventor found that when the bypass switch of the power module of the flexible DC converter valve is closed incorrectly, the power of the flexible DC converter valve will The through discharge of the module occurs, and the bypass switch may affect or damage other devices inside the power module of the flexible DC converter valve after the bypass switch bears the through discharge current of the power module of the flexible DC converter valve. Therefore, a power module of the flexible DC converter valve is provided The bypass switch current test method is to verify whether the bypass switch will affect or damage other devices inside the power module after being subjected to the through discharge current of the power module, and the long-term current flow is a technical problem that needs to be solved urgently

Method used

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  • Flexible DC converter valve power module bypass switch flow test method and device
  • Flexible DC converter valve power module bypass switch flow test method and device
  • Flexible DC converter valve power module bypass switch flow test method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0030] see figure 2 , image 3 , figure 2 It is the schematic diagram of the bypass switch flow test of the power module of the flexible DC converter valve, 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 schematic flow chart of the flow test method for the bypass switch of the power module of the flexible DC converter valve provided by the embodiment of the present invention includes:

[0031] 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 .

[0032] S2. When the power module of the flexible DC converter valve is operating normally, the IGBT1 of the power module of the flexible DC converter valve is triggere...

Embodiment 2

[0041] An embodiment of the present invention provides a flexible DC converter valve power module bypass switch flow test device, including a controller, the controller is configured to:

[0042] 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 mis-closed in actual working conditions and causes a direct short circuit;

[0043] 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;

[0044] When the signal of false closing of the bypass switch is collected, no blocking signal is sent to the IGBT1 to cause the direct discharge of the DC capacitor C1;

[0045] Conduct a flow test on the bypass switch, the flow circuit is not less than 1.05pu, and the test time is no...

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Abstract

The invention provides a method and device for testing the flow of a bypass switch of a power module of a flexible DC converter valve. 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 power module is running normally, the flexible DC converter valve power module IGBT1 will be turned on at time t1, and the bypass switch will be triggered to close incorrectly at time t2; when the signal of bypass switch wrong closing is collected, no blocking signal will be sent to IGBT1 , to cause the direct discharge of the DC capacitor; carry out a flow test on the bypass switch, the flow circuit is not less than 1.05pu, and the test time is not less than 72 hours; if it is detected that the indicators to be tested are normal, other equipment inside the power module Not affected or damaged, and the bypass switch can pass current for a long time. Through this test method, it can be verified whether the bypass switch will affect or damage other devices inside the power module after being subjected to the through-discharge current of the power module, and whether it can still pass current for a long time.

Description

technical field [0001] The invention relates to the technical field of flexible direct current transmission, in particular to a method and device for conducting a flow test of 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 bypass switch of the power module of the flexible DC converter valve in the existing technology, but the inventor found that when the bypass switch of the power module of the flexible DC converter valve is closed incorrectly, the power of the flexible DC converter valve will The through discharge of the module occurs, and the bypass switch may affect or damage other devices inside the power module of the flexible DC converter valve after the bypass switch bears the through discharge current of the power module of the flexible DC converter valve. Therefore, a power module of the flexible DC converter valve is provided The bypass s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/327G01R31/54
CPCG01R31/327G01R31/54
Inventor 杨柳周月宾许树楷
Owner ELECTRIC POWER RESEARCH INSTITUTE, CHINA SOUTHERN POWER GRID CO LTD
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