Power electronic device drive circuit based on current measurement, and control method for power electronic device drive circuit

Abstract

The invention relates to a power electronic device drive circuit based on current measurement and a control method for the power electronic device drive circuit, and belongs to the technical field of power electronic device drive circuits. The circuit comprises a power management module, a triggering module, a switching-on module, a switching-off module, a state monitoring module, a state feedback module, and a logic control module. The state monitoring module comprises a power monitor, a voltage monitor, a state monitor, a current monitor, and a current direct measurement sensor. The state monitoring module judges whether there is an overcurrent or not or the aging is severe or not according to a current measurement result, and feeds back the information to a hybrid DC circuit breaker control system, so as to employ a corresponding control protection strategy. The method comprises the steps: the control in a switching-off process of a hybrid DC circuit breaker and the control after the switching-off of the hybrid DC circuit breaker. The device can measure an on-state kA-level large current and an off-state mA-level leaked current, is wide in measurement frequency range, is large in range, is high in accuracy, is low in cost, is small in size, and reduces the risks of the damages of devices or the switching-off failure of a circuit breaker.

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