Photovoltaic (PV) generation is a green energy-saving power generation technology that has been vigorously developed in power system in recent years

but there is no engineering application in traction power supply system. Aiming at the situation of photovoltaic access traction power supply system

a method of using photovoltaic energy to improve the negative sequence of traction power supply system is proposed. According to the load current difference of power supply arm of traction system

theoretical analysis is used to select the photovoltaic access method and to improve the basic principle of the negative sequence of traction power supply system

and then the corresponding control method is proposed. According to different load conditions

the electrical simulation model is built on the Matlab/Simulink simulation platform. The simulation results show that the proposed method and control strategy can effectively improve the negative sequence problem of traction power supply system.