车网谐波耦合特性及车载抑制策略研究

Research on Vehicle-Network Harmonic Coupling Characteristic and Onboard Suppression Strategy

为经济有效地解决车网谐波耦合导致的车网匹配的矛盾,首先分析了交流列车网侧电流谐波特性及其与牵引网电压谐波关系,得出了一些具有指导作用的基本结论和规律,然后在此基础上,提出了基于PR控制和状态观测的车载谐波抑制策略,并通过线路运行试验验证了该策略能有效抑制车网谐振,实现了列车网侧电流总谐波畸变率为0.5%、等效干扰电流为1 A的优异性能,保障了车网系统安全可靠地运行。

In order to solve the problem of vehicle-network matching caused by vehicle-network harmonic coupling economically and effectively, the harmonic characteristics of the current of the AC network side and the relationship of the voltage harmonic of the traction network were analyzed, and some basic conclusions and rules with guiding effect were obtained. Then, the vehicle harmonic suppression strategy based on PR control and state observation was proposed, and through the line operation test, the strategy was proved could effectively suppress the resonance of the train network, achieving the excellent performance that the total harmonic distortion rate of the train network side current was 0.5%, and the equivalent interference current was 1 A, which ensured the safe and reliable operation of the train network system.