A driving circuit of power electronic device based on current measurement and its control method

Abstract

The invention relates to a power electronic device drive circuit based on current measurement and a control method thereof, belonging to the technical field of power electronic device drive circuits. The circuit includes: a power management module, a trigger module, an opening module, a shutdown module, and a state monitoring module. State feedback module, logic control module; the state monitoring module includes a power monitor, a voltage monitor, a state monitor, a current monitor and a current direct measurement sensor, and judges whether the device is over-current or seriously aging through the current measurement result, and will The information is fed back to the hybrid DC circuit breaker control system, so that corresponding control and protection strategies can be adopted. The method includes control during shutdown of the hybrid direct current circuit breaker and control after shutdown of the hybrid direct current circuit breaker. The invention can measure large kA-level current in the on-state and mA-level leakage current in the off-state, has wide measurement frequency domain, large measuring range, high accuracy, low cost, and small volume, and reduces the risk of device damage or circuit breaker shutdown failure.

Description

technical field [0001] The invention belongs to the technical field of drive circuits for power electronic devices, in particular to a semiconductor drive circuit, in particular to a drive circuit for power electronic devices based on current measurement used in hybrid DC circuit breakers. Background technique [0002] DC circuit breaker is the key equipment of DC line network. With the development of power electronic devices, gate turn-off thyristor GTO, insulated gate bipolar transistor IGBT, electron injection enhanced gate transistor IEGT, integrated gate commutation thyristor IGCT, emitter turn-off thyristor ETO and other high-power power electronic devices It is widely used in the field of DC power transmission and distribution, especially the hybrid DC circuit breaker based on the breaking current of power electronic devices has become an important development direction of DC circuit breakers. Hybrid DC circuit breaker structure such as figure 1 As shown, it mainly ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a new power electronic device drive circuit based on current measurement and its control method, which is used to drive power electronic devices in hybrid DC circuit breakers. The drive circuit It can overcome the problem that the existing drive circuit cannot directly measure the current passing through the power electronic device, and use one or more current sensors with different ranges to directly measure the current, thereby monitoring the working status of the power electronic device, feeding back status information and implementing corresponding control and protection strategies. Improve the reliability of power electronics and hybrid DC circuit breakers

Images