基于C型与单调谐滤波器组合的高铁牵引供电系统谐波治理方法

Harmonic Suppression of High Speed Railway Traction Power Supply System Based on Combination of Chebyshev Filter and Single Tuned Filter

针对高速铁路牵引供电系统谐波治理问题,分析牵引供电系统谐波问题产生机理;对比分析牵引供电系统加入5种无源滤波器后对系统的影响,并详细分析C型滤波器各参数及其与单调谐滤波器所构成的组合滤波器对系统阻频特性的影响;在此基础上,设计了采用C型滤波器和C型与单调谐滤波器组合的两种治理方案。结合牵引供电系统车网耦合仿真模型,仿真分析两种治理方案,并根据滤波效率、设备成本、不同列车数量等方面评估了两种方案。评估结果表明,C型与单调谐滤波器组合的方案滤波效率及性价比更优。

In order to study and eliminate the harmonic problems in traction power supply system,this paper firstly analyzed the harmonic generation mechanism of traction power supply system.Then,five types of passive filters were compared and their influences on traction power supply system were analyzed.Specifically,the influence of the parameters of Chebyshev filter and the combination of single tuned filter and Chebyshev filter on the system impedance characteristics was discussed.On this basis,two harmonic suppression schemes based on Chebyshev filter alone or the combination of single tuned filter and Chebyshev filter were designed.Finally,the two schemes were verified by the train-network coupling model and were evaluated by filtering efficiency,equipment cost and different number of trains.The results show that the combination suppression scheme of Chebyshev filter and single tuned filter is more efficient and cost-effective.