VIENNA整流器PI控制器参数设计方法

Parameter Design Method of PI Controller for VIENNA Rectifier

对于VIENNA整流器PI控制器参数的整定,使用将系统校正成典型结构的设计方法,需要做近似处理,会给整定带来误差,而且有时系统并不能简单地校正成典型结构。通过设定期望的电流环和电压环开环截止频率和相位裕度,应用所提出的方法,解析计算出控制器参数,可以避免上述弊端。同时,也可以对已确定的PI参数反计算出开环截止频率和相位裕度来评估系统性能。该整定方法联系了频域参数、PI参数和系统时域性能,目标明确,概念清楚易懂,简单易实现。最后,通过仿真和实验分析,证明了该整定方法的正确性和有效性。

For parameter optimization of the PI controller for the VIENNA rectifier,the use of correcting the system into a typical structure needs to do approximate processing,which will cause some errors for the whole settings,and sometimes the system will not be simply adjusted to the typical structure.By setting the anticipant open loop cut-off frequency and phase margin of current loop and voltage loop,the controller parameters could be calculated analytically,which means the disadvantage could be avoided.At the same time,it could also inverse-calculate the cut-off frequency and phase margin to evaluate the system performance of the given PI parameters.The method established the relationship among the system frequency domain parameters,PI parameters and system performance in time domain,which had made the tuning target intuitive and clear.With clear physical meaning of the parameters,the proposed strategy could be achieved easily.Finally,the simulations and experimental analysis verify the correctness and the effectiveness of the proposed method.