【摘要】 针对传统基于空间矢量调制的直接功率控制(Direct power control with space vector modulation,DPC-SVM)三相并网逆变器动态响应速度慢的问题,研究了一种三相并网逆变器的改进DPC-SVM方法。该控制方法基于传统空间矢量脉冲宽度调制(Space vector pulse width modulation,SVPWM)解耦控制的思想,利用参考功率前馈来提高系统的动态响应速度。详细阐述了传统和改进DPC-SVM方法的工作原理,并以15kVA三相并网逆变器为例对传统和改进DPC-SVM方法进行了仿真和实验验证。与传统控制方法相比,改进控制方法具有更快的动态响应速度。更多还原

【Abstract】 As dynamic response of the traditional direct power control using space vector modulation (DPC-SVM) is slow, an improved DPC-SVM method for three-phase grid-connected inverters is proposed. The proposed control method is deduced based on the decoupled control idea of the traditional space vector pulse width modulation (SVPWM). The reference power feedforward is used to improve the dynamic response. The operating principles of the traditional and improved DPC-SVM methods are illustrated. Simulation and experimental results of a 15 kVA three-phase grid-connected inverter with traditional and improved control methods verify the theoretical analysis. Compared with the traditional control method, the grid-connected inverter with the improved control method has fast dynamic response.更多还原