基于预测功率的三相电压型PWM整流器控制

摘要

基于直接功率控制理论研究了一种用于三相电压型整流器的空间矢量控制策略,不需要进行查找开关表和功率PI调节环,实现了定频控制.在MATLAB/Simulink下搭建了基于预测直接功率控制仿真模型,并与传统的开关表控制进行比较.仿真结果表明,基于P-DPC的控制系统实现了定频控制,具有动态、静态特性良好,鲁棒性好,控制精度高等优点.同时验证了新控制策略的可行性.%A direct power control (DPC) of three-phase rectifier with constant switching frequency using space-vector modulation (SVM) was investigated. The main advantages of the P-DPC, were that no need to use predefined switching table and voltage vector, Pi-based active and reactive power control loops were not necessary. The proposed predictive direct power control was tested in simulations and compared with DPC using switching table. Results have proved excellent performance, and verified the validity of the proposed DPC scheme, which was much better than conventional DPC using switching table.