This paper presents a battery integrated Power Flow Controller (PFC) which is found effective for the interconnection of several dc microgrids. The configuration offers delicate control over load-flow and also provides a way for the integration of Common Energy Storage (CES) to the adjacent grids. The CES is more effective when both the grids have surplus or deficit of power compared to their individual storage capacity (if any). In this paper, a Universal Active Power Control Converter (UAPCC) is proposed (which is basically a three-port converter), where port-1 is connected in parallel with the line, port-2 is connected in series with the line, and port-3 is connected to the CES through a bidirectional dc-dc converter. Relevant control algorithms have been developed for the operation of such system satisfying various system requirements that are inevitable for the interconnection of dc microgrids. The proposed control methods allow decoupled operation of three ports to control power flow between dc grids and CES independently. The complete system along with control methods are initially verified through computer simulation using MATLAB/SIMULINK. Thereafter, a prototype is developed in the laboratory at 380 V level to experimentally validate the concept. The results show effectiveness of the UAPCC for interconnection of dc microgrids with CES.

中文翻译：

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通用有源功率控制转换器，用于具有通用储能的直流微电网

本文介绍了一种集成了电池的功率流控制器（PFC），该控制器可有效连接多个直流微电网。该配置提供了对负载流的精细控制，还提供了一种将公共能源存储（CES）集成到相邻电网的方法。当两个电网都具有相对于其单个存储容量（如果有）的电力过剩或不足时，CES更有效。本文提出了一种通用有源功率控制转换器（UAPCC）（基本上是一个三端口转换器），其中端口1与线路并联，端口2与线路串联，并且端口3通过双向DC-DC转换器连接到CES。已经开发了用于这种系统的操作的相关控制算法，以满足直流微电网的互连所不可避免的各种系统要求。所提出的控制方法允许三个端口解耦，以独立控制直流电网和CES之间的功率流。完整的系统以及控制方法首先通过使用MATLAB / SIMULINK的计算机仿真进行了验证。此后，在实验室中以380 V的水平开发了原型，以通过实验验证该概念。结果表明，UAPCC对于将直流微电网与CES互连的有效性。完整的系统以及控制方法首先通过使用MATLAB / SIMULINK的计算机仿真进行了验证。此后，在实验室中以380 V的水平开发了原型，以通过实验验证该概念。结果表明，UAPCC对于将直流微电网与CES互连的有效性。完整的系统以及控制方法首先通过使用MATLAB / SIMULINK的计算机仿真进行了验证。此后，在实验室中以380 V的水平开发了原型，以通过实验验证该概念。结果表明，UAPCC对于将直流微电网与CES互连的有效性。