Status monitoring method for spark gap trigger circuit

Abstract

The invention provides a status monitoring method for a spark gap trigger circuit, which includes the steps: monitoring normality of a path of signal transmitted by a control protector; detecting the status of a trigger instruction output end of a programmable device logic circuit or the status of a trigger output end of a spark gap trigger device; subjecting the detected status signals to digital filtering; broadening narrow-pulse status signals obtained by filtering; and allowing a programmable device to transmit collected status marking signals to the control protector. By the method, the status of the gap trigger circuit can be determined timely and accurately; transient trigger pulse is detected at the trigger output end of the spark gap trigger device; transient status information is reliably transmitted to the control protector in milliseconds; and accordingly the problem of locating failure of the spark gap trigger circuit is well solved, and field debugging and maintenance of the spark gap circuit are facilitated greatly.

Description

technical field [0001] The invention belongs to the technical field of power systems and power electronics, and in particular relates to a spark gap trigger circuit state monitoring method. Background technique [0002] At present, suppliers of series compensation devices include ABB, GE, Siemens and China Electric Power Research Institute. These four units can all produce spark gaps, but the principles of triggering ignition are different, and the principles of corresponding spark gap triggering devices are also different. [0003] The control and protection device of the series capacitor consists of metal oxide voltage limiter MOV (Metal Oxide Voltage Limiter), forced trigger spark gap, damping circuit and bypass circuit breaker. Metal Oxide Voltage Limiter MOVs limit the voltage level across series capacitors during system faults; forced spark gaps are compensated by fixed series capacitors when Metal Oxide Voltage Limiter MOVs absorb too much energy or in cases where fa...

AI Technical Summary

Problems solved by technology

However, the existing spark gap triggering device focuses on the triggering function, and the state monitoring function of the device is very weak, and it is impossible to realize the state monitoring of the spark gap triggering circuit

[0005] The existing spark gap triggering device cannot reliably monitor the state of the gap triggering circuit, and send the status information to the control and protection device in real time, which cannot solve the problem of fault location of the spark gap triggering circuit, making fault analysis, on-site debugging and difficult to maintain

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