静止坐标系下铁路功率调节器电流谐振控制

摘要

针对传统的两相dq旋转坐标系下比例积分(PI)控制策略控制器结构复杂、动态性能不佳、抗供电臂电压跌落能力较弱的问题,设计了基于V/v牵引变压器的铁路功率调节器准比例谐振(QPR)控制器.从系统结构复杂度、系统动态性能和抗供电臂电压跌落3个方面对比铁路功率调节器的PI和QPR控制策略.与传统PI控制策略相比,QPR控制策略避免了多重低通滤波处理,无需繁琐的旋转坐标变换,不存在受电路参数影响的耦合项和前馈补偿项,简化了控制器的设计,提高了系统的鲁棒性和动态性,而且抗供电臂电压跌落能力更好.仿真实验验证了QPR控制策略的正确性和有效性,具有较好的工程应用和推广价值.%Railway static power conditioner (RPC) can comprehensively solve electric power quality problems such as negative sequence,reactive power in the electrified railway.For such problems as the complex structure of controller and the poor dynamic performance of the system of conventional PI control strategy under the two phase dq rotating frame and the relatively weak ability of anti voltage sag of power supply section,a QPR control strategy of Quasi-Proportional Resonant (QPR) under the two phase αβ static coordinate is designed in this paper.A comparative study of PI and QPR control strategies of RPC is carried out from the aspects of the complexity of system structure,the dynamic performance of the system and anti voltage sag of power supply section.According to the theoretical analysis,compared with the conventional PI control strategy,in this QPR control strategy,the multiple lowpass filter treatment is avoided,no complicated transformation of rotating coordinate is needed,there are no coupling terms and feedback compensation terms affected by circuit parameters,the design of controllers is simplified,the robustness and dynamism of the system is improved and the ability of anti voltage sag of power supply section is facilitated.The correctness and effectiveness of the proposed control strategy are verified by the simulation experiments,which has good values for engineering application and popularization.