Predictive Power Control and Power Management for Islanded PV Microgrid with Battery-Supercapacitor Hybrid Energy Storage System

Soundous Remache, Seif El Islam Remache, K. Barra
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Abstract

Energy storage systems are needed in islanded photovoltaic microgrids to ensure the load requirements when there is insufficient solar irradiation. The low cost and the high energy density make the lead acid batteries ideal for many applications in microgrids, however the major issue is their poor service life. Battery-Supercapacitor hybrid energy storage system with an optimal energy flow management strategy are proposed in this paper. Due to their high power density, supercapacitors are used to respond to quick load fluctuations and reduce the stress on batteries. The photovoltaic generator, batteries and supercapacitors are connected to the DC bus through DC-DC converters controlled using the model predictive control. Depending on solar irradiation, batteries state of charge and supercapacitors state of charge, many operation modes are simulated and discussed showing the reliability of the proposed power management strategy.
电池-超级电容器混合储能系统孤岛光伏微电网预测功率控制与功率管理
孤岛型光伏微电网需要储能系统来保证太阳辐照不足时的负荷需求。低成本和高能量密度使铅酸电池成为微电网中许多应用的理想选择,但主要问题是其使用寿命较差。提出了一种具有最优能量流管理策略的电池-超级电容器混合储能系统。由于其高功率密度,超级电容器用于响应快速负载波动并减少对电池的压力。光伏发电机、电池和超级电容器通过模型预测控制控制的DC-DC转换器连接到直流母线上。根据太阳辐照、电池的充电状态和超级电容器的充电状态,模拟和讨论了多种工作模式,证明了所提出的电源管理策略的可靠性。
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