基于Simulink的三相APFC建模与仿真

Modeling and Simulation of Three-Phase APFC Based on Simulink

对三相六开关Boost型APFC电路拓扑进行分析,采用坐标变换,建立了三相PFC在两相dq坐标系下的数学模型,实现了有功和无功的解耦,并基于空间矢量调制算法,构建双闭环控制。此外,还基于Simulink平台搭建了系统的仿真模型,仿真结果表明该方案改善了系统的动态响应,降低了系统开关管的功率损耗,提高了电压利用率。

The three-phase six switch boost APFC circuit topology is analyzed, and by using coordinate transforma- tion, the three-phase PFC in two-phase d-q coordinate system mathematical model is established, and the active pow- er and reactive power feed forward decoupling are realized. Based on space vector pulse width modulation algorithm, the double closed loop control is constructed. Finally, a system simulation model based on Simulink platform is built. The simulation results show that, the system dynamic response is improved through the scheme, the power loss in the system of switch tube is reduced, the utilization rate of voltage is improved, and the feasibility of the control algorithm is proved.