An electrical-magnetic hybrid power quality compensation strategy for V/V traction power supply system

To compensate negative sequence current in highspeed railway power supply system, a novel compensation strategy based on railway power conditioner (RPC) and magnetic controlled reactor (MCR) based static var compensator (SVC) is proposed in this paper. As the traditional RPC compensation needs a big capacity, a combination of RPC and magnetic static var compensation (MSVC) is put forward. The electrical models based on fundamental and harmonic domain are analyzed. Furthermore, this paper comes up with the principle of negative current compensation and harmonic current suppression. The control strategy is proposed. The simulation results confirm the correctness of the proposed method.