Plasma jet trigger gap test device and test method

Abstract

According to the plasma jet trigger gap testing device and method, one end of a charging circuit breaker QF1 is connected with a direct-current power supply, the other end of the charging circuit breaker QF1 is connected with the high-voltage output end of a capacitor bank CS, and the other end of the capacitor bank CS is grounded; one end of the test circuit breaker QF2 is connected with the high-voltage output end of the capacitor bank CS, one end of the reactor L is connected with the test circuit breaker QF2, and the other end is connected with the high-voltage end of the quick mechanicalswitch S; the high-voltage end of the resistance voltage divider PT is connected with the high-voltage end of the plasma jet trigger gap TSG; the other end is connected with the ground, the Rogowski coil CT is sleeved at the low-voltage end of the plasma jet trigger gap TSG; one end of the protection sphere gap BQ is connected with the high-voltage end of the quick mechanical switch S, the other end is connected with the ground, the input end of the controller is connected with a resistance voltage divider PT measurement signal, the first output end of the controller is connected with the driving input end of the driving module, and the second output end is connected with the control end of the quick mechanical switch S.

Description

technical field [0001] The invention relates to the technical field of plasma spraying, in particular to a plasma spraying trigger gap testing device and testing method. Background technique [0002] The plasma jet trigger gap can use pulse discharge to stimulate high-speed plasma jet to penetrate the main gap at an extremely low working coefficient, effectively triggering the switch to be turned on. In the UHV DC transmission project, the plasma jet trigger gap is one of the important equipment to protect the converter station. When the output fault occurs on the AC side, the DC side plasma jet trigger gap and the DC circuit breaker operate at the same time, and the trigger gap is 100μs After about 30ms, the circuit breaker is turned on and the current is transferred to the circuit breaker, which triggers the gap to cut off the arc. In order to verify that the plasma jet trigger gap has a direct current large-capacity flow capacity, a plasma jet trigger gap test device and...

AI Technical Summary

Problems solved by technology

[0003] The DC large-capacity test circuit of the plasma jet trigger gap needs to simulate its actual working conditions in the DC system. Since the trigger gap has to withstand high voltage before it is turned on, it is difficult to realize the corresponding high-voltage DC system, and such a test is built. The circuit investment is huge

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