This study proposes a power conversion interface for a DC grid and a single-phase utility. The proposed power conversion interface is configured using an interleaved AC–DC power converter and a DC hybrid power filter. The interleaved AC–DC power converter controls the real power between the DC grid and the single-phase utility in both directions. The interleaved AC–DC power converter can effectively reduce the high-frequency harmonic currents at both the AC side and DC side. A new current-sharing control method is used to equalise the currents in the interleaved power-electronic arms using only one current sensor in the interleaved AC–DC power converter. The DC hybrid power filter is connected between the DC bus of the interleaved AC–DC power converter and the DC grid. The DC hybrid power filter is controlled to be operated as a virtual low-frequency AC resistor connected to the DC grid in series and the low-frequency harmonic for the DC input current of the interleaved AC–DC power converter is suppressed. Accordingly, the problems of harmonic currents for a power conversion interface used between the DC grid and the single-phase utility are attenuated. A hardware prototype is developed to verify the performance of the proposed power conversion interface.

中文翻译：

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具有谐波抑制功能的电源转换接口，用于直流电网和单相设备

这项研究提出了一种用于直流电网和单相电网的电源转换接口。建议的电源转换接口使用交错式AC-DC电源转换器和DC混合电源滤波器配置。交错的AC-DC电源转换器在两个方向上控制DC电网和单相公用事业之间的有功功率。交错的AC-DC电源转换器可以有效降低AC侧和DC侧的高频谐波电流。一种新的均流控制方法用于在交错式AC-DC电源转换器中仅使用一个电流传感器来均衡交错式电力电子臂中的电流。直流混合电源滤波器连接在交错的交流–直流电源转换器的直流母线和直流电网之间。直流混合电源滤波器被控制为用作虚拟低频交流电阻器，该电阻器串联连接到直流电网，并且抑制了交织式AC-DC电力转换器的DC输入电流的低频谐波。相应地，用于DC电网和单相公用事业之间的功率转换接口的谐波电流的问题得到了缓解。开发了硬件原型，以验证建议的电源转换接口的性能。