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Adjustable virtual inertia control of supercapacitors in PV-based AC microgrid cluster

机译：基于PV的AC微电网簇中超级电容器的可调节虚拟惯性控制

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This paper investigates a novel control strategy of supercapacitors to improve the dynamic stability of the interconnected PV-based AC microgrid clusters in standalone operation. An emerging definition of supercapacitors is proposed to emulate the dynamic inertia response. This definition establishes the dynamic connections between the state-of-charge (SOC), the frequency of the standalone AC microgrid clusters and the power of supercapacitors. Then this paper presents a theoretical analysis of dynamic stability on two-area PV microgrid clusters. According to the type of AC microgrid, the dynamic inertia constant is also analyzed. Based on the dynamic stability analysis of two-area PV microgrid clusters and the dynamic inertia constant analysis of supercapacitors, the adjustable virtual inertia control method of supercapacitors is proposed to extract the stored energy for the dynamic inertia response. The aim of the proposed control scheme is to solve the low inertia and weak damping of the standalone interconnected PV microgrid clusters. The effectiveness of the proposed control scheme is validated by Matlab/Simulink platform.
机译：本文研究了超级电容器的新型控制策略，提高了独立操作中互连的PV基AC微电网簇的动态稳定性。提出了超级电容器的新出现定义，以模拟动态惯性响应。该定义建立了充电状态（SOC），独立AC微电网群的频率和超级电容器的功率之间的动态连接。然后本文介绍了两区PV微电网簇的动态稳定性的理论分析。根据AC微电网的类型，还分析了动态惯性常数。基于两面积PV微电网簇的动态稳定性分析及超级电容器的动态惯性恒定分析，提出了超级电容器的可调节虚拟惯性控制方法，提取了动态惯性响应的储存能量。所提出的控制方案的目的是解决独立互连光伏微电网簇的低惯性和弱阻尼。所提出的控制方案的有效性由Matlab / Simulink平台验证。

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