三电平两桥臂有源电力滤波器单周控制策略

提出了一种三电平有源电力滤波器（APF）单周控制策略及其均压方法。以三电平两桥臂变换器作为拓扑结构,能够有效降低硬件成本,在充分理解工作原理的基础上,详细推导了控制目标方程。为了抑制直流母线上、下电容电压的波动,提出了两种均压方法：电压模式均压和电流模式均压。仿真结果表明本文所提出的单周控制策略可有效补偿谐波,抑制直流母线上、下电容电压的波动,从而验证了该控制策略的有效性和可行性。

One-Cycle Control Strategy of Three-Level Two-Leg Active Power Filter

A one-cycle control strategy of three-level two-leg active power filter（ APF） and its voltage-balance method were proposed. The hardware cost can be reduced by using three-level two-leg converter as the topology,and the control objectives equations were derived based on its work. In order to suppress the fluctuation of the DC bus voltage,two voltage-balance methods were presented,such as the voltage mode for voltage-balance and current mode for voltage-balance. The simulation results show the one-cycle control strategy for three-level two-leg APF is able to compensate the harmonic current effectively,and suppress the fluctuation of the DC bus voltage,which verifies its validity and feasibility.