新型电气化铁路电能质量管理系统

为改善高速牵引系统电能质量及运行效率，提出一种新型电气化铁路电能质量管理系统。依托于常规背靠背电气化铁路电能质量治理装置，将回馈工况与牵引工况统一归入电能质量补偿范畴，解决了一次侧功率因数低、电流不平衡度高等基波电能质量问题。将机车回馈能量送至电网或其他机车利用，避免了使用能耗电阻引起的不必要损耗或增大投资安装储能装置。基于实测数据，在Matlab/Simulink中搭建了仿真模型。仿真结果表明，系统运行后三相电流不平衡度明显减小，功率因数有大幅提高，明显改善了一次侧的电能质量。同时，机车回馈工况下的能量可为其他牵引工况机车所利用，提高了系统运行效率。

New power quality management system in electrical railway

In order to improve the power quality and operation efficiency of high-speed traction systems, a new electrical railway power quality management system is proposed. Based on the normal back-to-back power quality control facility in electrical railways, the primary fundamental power quality problems such as poor power factor, three-phase current unbalance, etc. are solved by considering traction and regeneration condition together for compensation. The unnecessary power loss on dissipation resistors and extra investment on storage facility are saved by taking the feedback energy into the primary-side grid or other traction-condition locomotives. A simulation model is established in Matlab/Simulink based on some measured data. Simulation results show that the unbalance of three-phase current is significantly reduced, the power factor is greatly raised, and the primary-side power quality is obviously improved. On the other hand, the regeneration energy can be used by other traction locomotive, and the system operation efficiency is enhanced. This work is supported by the Planned Science and Technology Project of Hunan Province (No. 2016TP1023) and Scientific Research Fund of Hunan Provincial Education Department (No. 15A170 and No. 16A191).