Research on voltage comprehensive compensation system and control strategy of high-speed railway traction network

Abstract

High-speed railway, as one of the most important forms of transportation, have been developed rapidly throughout the world. As the people’s living condition improves, the energy demand in China’s transport sector has grown dramatically and will keep increasing in the short term. In order to support the realization of ’ energy conservation ’ vision, it is urgent to adopt energy technology to change the structure of traditional high-speed railway system and realize the green, high efficiency and high elasticity transformation of high-speed railway system. High-speed railway will cause voltage fluctuation of the traction network during driving, which may affect the safety and reliability of high-speed railway in severe cases. In order to improve the voltage fluctuation of traction network caused by high-speed railway, this paper proposes a comprehensive voltage compensation system (VCCS) and its control strategy for high-speed railway traction network. Firstly, the causes of voltage fluctuation in traction network are analyzed, and the existing compensation methods at home and abroad are introduced. Then, the topology and compensation principle of high-speed railway traction network voltage compensation system are introduced, and the corresponding control strategy is proposed. Finally, the correctness of the theoretical analysis is verified by simulation experiments. The experimental results show that the VCCS proposed in this paper can ensure that the high-speed train can maintain full power operation under various typical working conditions, and effectively improve the voltage fluctuation of the traction network.

Keywords

• High-speed railway
• Voltage fluctuation
• Comprehensive compensation system
• Control strategy