三电平APF虚拟磁链模型预测SVPWM算法研究

Algorithm Research on Three-level APF Virtual Flux Linkage Model Predict SVPWM

采用一种基于虚拟磁链模型预测的空间矢量脉宽调制(SVPWM)算法,以磁链误差最小为优化目标建立价值函数,通过模型预测获取最优目标电压矢量。提出了一种以传统比例积分(PI)控制器为外环,磁链跟踪为内环的双环复合控制策略,外环保证稳态性能,提高响应速度,内环保证跟踪给定电流的磁链精度,达到系统的最优控制,最后通过仿真和实验证明了所提策略的正确性和可行性。

A space vector pulse width modulation （SVPWM） algorithm based on virtual flux linkage model prediction is used to establish the value function with the minimum flux error as the optimization target, and the optimal target voltage vector is obtained by model prediction.A double loop compound control strategy with traditional proportional- integral（PI） converter as outer loop and flux linkage as inner loop is presented, the outer loop guarantees steady state performance and improves the response speed, the inner loop guarantees the accuracy of tracking the flux linkage of a given current to achieve the optimal control of the system.Finally, the correctness and feasibility of the proposed strat- egy are proved through simulation and experiment.