混合箝位式PWM整流器研究

Research on the Hybrid-clamped PWM Rectifier

针对大功率混合箝位式三电平整流器,分析了其工作原理,对静止a,b,c坐标系下混合箝位式三电平整流器的数学模型进行了详细推导,坐标变换后得到两相同步旋转d,q坐标系下整流器的数学模型。整流器采用基于电网电压定向的直接电流控制策略,在Matlab中搭建了仿真模型,并完成了相关实验。仿真和实验证明了数学模型的正确性和控制策略的有效性。

For the high-power hybrid-clamped three-level rectifier,its working principle is analyzed,the mathematical model of the hybrid-clamped three-level rectifier under a,b,c stationary coordinate is deduced in detail,the mathematical model under two-phase rotating coordinate is obtained after coordinate transformation.The direct current control strategy based on the orientation of the grid voltage is employed for the rectifier.The simulation model is built in matlab,and the relevant experiment is completed.The correctness of the mathematical model and the effectiveness of the control strategy are verified by the simulation and experiment.