Research on Comprehensive Compensation Strategy for Long-distance Cable Traction Power System

The construction of electrified railway faces power quality problems dominated by reactive power and negative sequence due to the complex terrain and weak power grid structure in highland areas. To solve the problems, this paper discusses the technical scheme of Long-distance Cable traction power supply system (LCTPS) and its control strategy. Firstly, a Long-distance cable power supply model is constructed and a reactive power compensation scheme applicable to this system is designed. Then, a reactive power negative sequence compensation scheme is designed based on the theory of cophase power supply. Furthermore, a comprehensive compensation control strategy was established based on IEEE standards. Finally, a simulation model is established to analyze the correctness of the compensation scheme and verify the effectiveness of the compensation strategy.