城轨牵引供电系统PWM整流器无源性功率控制研究

现行城轨牵引供电系统多用多脉波整流的方式,但是存在谐波污染严重、能量不能双向流动的缺点,针对上述问题,文章提出了基于无源控制策略的整流器控制方式,对该种控制方式首先进行了理论推导,根据电压型整流器的主电路拓扑结构,建立了系统在两相同步旋转坐标系下的EL模型,并采用了解耦控制策略对控制器进行设计,最后将该方法用于城轨牵引供电系统中,控制整流器输出接触网(轨)的电压,并且在此基础上分析了负载扰动,机车制动,电网不平衡条件下整流器的性能,仿真结果表明,整流器具有很好的稳定性、抗干扰性,单位功率因数运行特性,对城轨牵引供电系统提供了很好的理论依据。

Research on Passivity-based Power Control of PWM Rectifier in Urban Rail Traction Power Supply System

At present, multi-pulse rectification way is applied in urban rail traction power supply system.However, there are some disadvantages which include the serious harmonic pollution and the energy that cannot flow in both directions.In view of the above problems, this paper puts forward a rectifier control method based on passive control strategy.For this kind of control mode, firstly, according to the topology structure of the main circuit of the voltage rectifier, the EL model of the system is established in two-phase synchronous rotating coordinate.The decoupling control strategy is used to design the controller.Finally, the strategy is used in the urban rail traction power supply system to control the voltage of the rectifier output contact network (rail).On this basis, the performance of the rectifier is analyzed under the conditions of load disturbance, locomotive braking and grid unbalance.The simulation results show that the rectifier performs well at stability, anti-jamming, unit power factor operating characteristics.This paper provides a good theoretical basis for urban rail traction power supply system.