Independent power decoupling (IPD) topologies are used to mitigate the twice-line-frequency ripple power in single-phase systems. Then, bulky passive capacitors or inductors can be removed. This paper proposes an improved IPD topology for single-phase current source converters (SCSCs) to remove the bulky DC rail inductor. It only adds one active switch and one diode. When compared with existing IPD circuits, the required switch devices are minimum and control is flexible. In addition, due to the fact that two identical capacitors are used to buffer the ripple power, the buffer capacitor voltage stress and DC current ripple are significantly reduced. This paper introduces the operation mode and switching states of the proposed topology. Then, the modelling and control strategy are introduced. Moreover, the designs of the passive components are presented. Finally, the effectiveness of the proposed topology is verified by constructing a low-power experimental prototype.

独立电源去耦 (IPD) 拓扑用于减轻单相系统中的两倍线频纹波功率。然后，可以移除笨重的无源电容器或电感器。本文提出了一种用于单相电流源转换器 (SCSC) 的改进 IPD 拓扑，以去除笨重的直流导轨电感器。它只增加了一个有源开关和一个二极管。与现有的IPD电路相比，所需的开关器件最少，控制灵活。此外，由于采用了两个相同的电容来缓冲纹波功率，使得缓冲电容电压应力和直流电流纹波显着降低。本文介绍了所提出拓扑的工作模式和开关状态。然后，介绍了建模和控制策略。而且，介绍了无源元件的设计。最后，通过构建低功耗实验原型验证了所提出拓扑的有效性。