提出一种单周控制的三电平单相有源电力滤波器。它提高了系统承受的电压和功率等级,减小了功率器件承受的电压应力,控制器结构简单,具有控制精度高,补偿效果好的特点。适合于大功率高电压场合,易于推广到工业应用。在建立数学模型的基础上进行了仿真研究,仿真结果证明其具有很好的动静态补偿性能,能有效地补偿系统谐波,提高输电线功率因数和传输效率。 A one-cycle controlled three-level single-phase active power filter is proposed. It increases the system withstand voltage and power levels, reducing the voltage stress on the power device, the controller structure is simple, with high control accuracy, good compensation effect. Suitable for high-power high-voltage occasions, easy to promote to industrial applications. Based on the establishment of the mathematical model, the simulation study is carried out. The simulation results show that it has good dynamic and static compensation performance, which can effectively compensate the system harmonics and improve the transmission line power factor and transmission efficiency.