基于高压直流输电的新型电气化铁道供电方法

针对传统牵引供电网存在的功率因数低、谐波含量高、网压不足、电能损耗大等能效问题，提出了一种基于高压直流输电的新型电气化铁道供电方法。在对传统牵引网能效问题解决方法进行分析的基础上，构建了基于高压直流输电的交流牵引供电网和直流牵引供电网两种系统拓扑。利用最近电平逼近技术对牵引网谐波含量进行了分析，论述了功率控制解耦技术的动态调节原理，研究了直流环节对牵引网的谐波含量和能量损耗的改善，比较了两种新型牵引网系统拓扑的优势和实现的可能性。

A Novel Power Supplying Method for Electrified Railway Based on HVDC

It presented a novel power supplying method of electrified railway based on HVDC according to the energy efficiency issues of traditional traction network such as low power factor, high harmonic contents, insufficient grid-voltage and high energy loss. Based on the analysis of solving method for the energy efficiency issues, system topologies of AC and DC traction network were constructed. Using NLM technology, harmonic contents of traction network were analyzed. It discussed dynamic regulation principle of power decoupling technology, researched the improvement of harmonic contents and energy loss of traction network, and compared realization possibility and advantages of the two novel traction network topologies.