高速铁路车网耦合下的谐波潮流计算方法研究

为分析高速铁路牵引供电系统的谐波分布及其传输特性,在建立牵引网和CRH2型动车组谐波分析模型的基础上,提出了一种基波潮流与谐波潮流交替计算的谐波潮流计算方法。该计算方法充分考虑了高速铁路牵引网与动车组之间的电气耦合关系,即谐波电压与谐波电流之间的影响。通过分别对单列和两列动车组运行时牵引网的谐波潮流计算分析表明,该算法适用于高铁牵引供电系统单谐波源、多谐波源以及含有背景谐波时的谐波潮流计算,并且可以较为精确地反映牵引网谐波谐振现象,可为高速铁路牵引供电系统谐波谐振的分析和治理提供参考。

Harmonic load-flow approach based on train-catenary coupling system of high-speed railway

In order to determine the harmonic distribution and propagation characteristics of traction system in high-speed railway, this paper proposes a novel harmonic load-flow method based on the multi-transimission model of traction network and harmonic load model of high-speed train(CRH2). The coupling relationship between traction network and high-speed train are fully considered, i.e. coupling between harmonic voltage of traction lines and harmonic injection currents of the train. This harmonic load flow method is applied to analyze the harmonic distortions of the whole system when single train and multiple trains run on the track. The results indicate that the proposed method is suitable for harmonic load flow in traction system with single or multiple harmonic sources and background harmonics. Moreover, this method can provide reference for analyzing and controlling of harmonic resonance in traction system since it performs well in reflecting the harmonic resonance phenomenon.