In this article, a decentralized photovoltaic (PV)–battery energy storage (BES) coordination control method for Plug-n-Play (PnP) dc microgrid (MG) is proposed. With the proposed control method, PV units can operate under dc bus voltage control when BES units are saturated due to state-of-charge (SoC) limit or charging/discharging power limit. The mode transition and power sharing are based on a communication-less manner. By bypassing communication, the MG system can become more flexible and reliable. The proposed control system contains controllers for PV converter and BES converter, respectively. The PV converter controller can achieve seamless mode transition between maximum power point tracking (MPPT) control and droop control. The BES converter controller has a decoupled feature that a high-pass-filter (HPF) path could improve MG dynamic performance under generation-dominating mode. The BES HPF compensation overcomes the issue of poor dynamic performance under PV-dominating mode and makes the system more resistive to PV parameter variation. The detailed design, analysis, and implementation of the proposed PV–BES coordination control are provided in this article. The simulation and experimental results have been provided to verify the concept and analytical study.

中文翻译：

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具有改进动态性能的分散式 PV-BES 协调控制孤岛即插即用直流微电网

在本文中，提出了一种用于即插即用 (PnP) 直流微电网 (MG) 的分散式光伏 (PV)-电池储能 (BES) 协调控制方法。使用所提出的控制方法，当 BES 单元由于充电状态 (SoC) 限制或充电/放电功率限制而饱和时，PV 单元可以在直流总线电压控制下运行。模式转换和功率共享基于无通信方式。通过绕过通信，MG 系统可以变得更加灵活和可靠。所提出的控制系统包含分别用于 PV 转换器和 BES 转换器的控制器。PV 转换器控制器可以实现最大功率点跟踪 (MPPT) 控制和下垂控制之间的无缝模式转换。BES 转换器控制器具有解耦特性，即高通滤波器 (HPF) 路径可以提高发电主导模式下的 MG 动态性能。BES HPF 补偿克服了光伏主导模式下动态性能差的问题，使系统更能抵抗光伏参数变化。本文提供了所提议的 PV-BES 协调控制的详细设计、分析和实施。提供了仿真和实验结果来验证概念和分析研究。本文提供了提议的 PV-BES 协调控制的实施和实施。提供了仿真和实验结果来验证概念和分析研究。本文提供了提议的 PV-BES 协调控制的实施和实施。提供了仿真和实验结果来验证概念和分析研究。