中文摘要：

首先详细分析了低频脉动电流抑制机理,然后以两级式逆变器为例,基于直流电源输入端、前级DC/DC变换器、直流母线电容支路和后级逆变器4个位置详述了现有的低频脉动电流抑制方法 ,主要包括控制策略和拓扑优化。总结阐述了单相逆变器低频脉动电流抑制方法的基本思想,分析讨论了现有方法的技术原理和优缺点。通过对比分析现有低频脉动电流抑制方法的特点,为后续研究点明了方向,并以新型Boost逆变器为例,实验验证了新型控制策略对输入低频脉动电流的抑制效果。

英文摘要：

The mechanism of low-frequency ripple current suppression is analyzed in detail and in terms of control strategy and topology optimization,the existing methods for suppressing the low-frequency ripple current of two-stage single-phase inverter are discussed respectively for four sections：DC input,front-stage DC / DC converter,DC-bus capacitor branch and back-stage inverter. The basic concept of low-frequency ripple current suppression for single-phase inverter is analyzed,the technical principles,advantages and disadvantages of existing methods are summarized,their characteristics are compared and its future research direction is pointed out. As an example,an experiment for a new Boost inverter verifies the effectiveness of new control strategy for low-frequency ripple current suppression.