不平衡电网下Vienna整流器控制策略研究

Vienna整流器结构简单,功率密度高,被广泛应用于航空电源、电动汽车充电系统等工业应用中。不平衡电网下Vienna整流器通过准比例谐振(quasi-proportional resonance,QPR)控制器可以在静止坐标系下跟踪参考电流实现零稳态误差控制。基于QPR控制器的电流控制回路结构相对简单,但是其参数设计较为复杂。为解决这一问题,提出一种简易的QPR控制器参数设计方法,并验证系统稳定性。最后,在Vienna整流器实验平台上验证所提策略的有效性。

Vienna rectifier is widely used in aviation power supply,electric vehiclecharging system and other industrial applications because of its simple structure and high power density.In unbalanced power system,Vienna rectifier can achieve zero steady-state error control by tracking reference current in static coordinate system through quasi-proportional resonance(QPR)controller.The structure of current control loop based on QPR controller is relatively simple,but its parameter design is more complex.To solve this problem,a simple parameter design method of QPR controller is proposed,and the stability of the system is verified.Finally,the effectiveness of the proposed strategy is verified on the Vienna rectifier experimental platform.