A Brief Overview of The Status and Prospects of Railway Static Power Conditioner

The electrified railway static power conditioner not only has the ability to control the two-phase active power, reactive power and harmonic current of the traction substation and the basic functions of reducing the negative sequence but also can complete the active power fusion of the traction power supply arm on both sides, which can significantly improve the power quality of the railway traction power supply network is widely used in railway traction power supply systems. The research background, common topology, compensation principle and typical control strategy of railway power regulator are reviewed. The topology of the railway power conditioner is explained from the single-module and modular multi-level topologies, and it is considered that the new power electronics topology, advanced control strategy, soft switching technology, high-power application, and power electronic integrated system Stability, etc. will be the future research direction of railway power regulators.