In this article, a novel multiport converter (MPC) to interface different solar photovoltaic modules (SPM), and the battery with a 380 V dc microgrid is proposed. It is ensured that all the photovoltaic modules are operated at their respective maximum power points (MPPs), which is a unique feature of the proposed scheme. The boosting of the low voltages of the SPMs and that of the battery to 380 V is accomplished by involving a dc–dc converter along with a high-frequency transformer. The battery banks are charged directly from the power of the SPM without involving the high-frequency transformer. This significantly reduces the power flow path within the system. The MPC can operate in stand-alone mode or in microgrid connected mode as and when required. In the microgrid-connected mode, it is capable of realizing the MPP tracking, and at the same time, it is able to control the charging current of the battery as per the requirement of its charge controller. When MPC is operated in stand-alone mode, the voltage across the local loads are regulated at 380 V. The proposed MPC is modeled using the first component approximation method to facilitate the design of the appropriate controllers. The effectiveness of the proposed scheme is established by performing detailed simulation studies. A hardware prototype of the MPC is fabricated. Detailed experimental studies are carried out utilizing the developed prototype to confirm the viability of the proposed scheme.

中文翻译：

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连接太阳能光伏模块和储能与直流微电网的多端口转换器

在本文中，提出了一种用于连接不同太阳能光伏模块 (SPM) 的新型多端口转换器 (MPC)，以及具有 380 V dc 微电网的电池。确保所有光伏模块都在其各自的最大功率点 (MPP) 下运行，这是所提出方案的独特之处。SPM 的低电压和电池的低电压升至 380 V 是通过涉及一个 dc-dc 转换器和一个高频变压器来实现的。电池组直接由 SPM 的电源充电，无需使用高频变压器。这显着减少了系统内的功率流动路径。MPC 可以根据需要在独立模式或微电网连接模式下运行。在微电网并网模式下，能够实现MPP跟踪，同时可以根据其充电控制器的要求控制电池的充电电流。当 MPC 在独立模式下运行时，本地负载两端的电压调节为 380 V。建议的 MPC 使用第一分量近似方法建模，以促进适当控制器的设计。通过进行详细的模拟研究，确定了所提出方案的有效性。制作了 MPC 的硬件原型。利用开发的原型进行详细的实验研究，以确认所提出方案的可行性。建议的 MPC 使用第一分量近似方法进行建模，以促进适当控制器的设计。所提出方案的有效性是通过进行详细的模拟研究来确定的。制作了 MPC 的硬件原型。利用开发的原型进行详细的实验研究，以确认所提出方案的可行性。建议的 MPC 使用第一分量近似方法进行建模，以促进适当控制器的设计。通过进行详细的模拟研究，确定了所提出方案的有效性。制作了 MPC 的硬件原型。利用开发的原型进行详细的实验研究，以确认所提出方案的可行性。