Simulation and research on over-voltage suppression for high voltage transmission line

For different types of fault in transmission line, the generation mechanism of tripping and closing over-voltage is analysed. To built the double power supply system of high-voltage transmission line simulation model by PSCAD/EMTDC, finally, for the operation of over-voltage, when the line occurs of different types faults, simulation to study tripping and closing over-voltage's size and the extent of influence, derived its tripping and closing over-voltage suppression measures and control strategies. The results showed that: for the circuit breaker tripping and closing over-voltage, the circuit breaker shunt reactor has better effect on the over-voltage suppression and improves the reliability of operation and the safety of protection of the system