Abstract Microgrids based on renewable energy require energy storage systems to mitigate the power imbalances that arise due to variable and intermittent nature of renewable sources. Battery energy storage system (BESS) has been widely used to provide the necessary support. However, higher cost and limited life depending on number of charging and discharging cycles, restricts its application. The calendar life of the BESS can be improved by optimizing the control operation of the battery. This paper presents a control strategy for distributed BESS in a centrally controlled microgrid to enhance the calendar life of BESS. The proposed strategy controls the charging and discharging of individual batteries based on state of charge (SOC), state of health (SOH) and maximum capacity. The controller selects the BESS with better health and higher capacity for operation on priority resulting in better calendar life of the energy storage system. The simulations results for the test system indicates an overall improvement in calendar life of BESS by 57%.

中文翻译：

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微电网分布式储能系统优化协调控制提高电池寿命

摘要 基于可再生能源的微电网需要储能系统来缓解由于可再生能源的可变性和间歇性而引起的功率不平衡。电池储能系统（BESS）已被广泛应用于提供必要的支持。然而，取决于充放电循环次数的较高成本和有限寿命限制了其应用。BESS 的日历寿命可以通过优化电池的控制操作来提高。本文提出了一种集中控制微电网中分布式 BESS 的控制策略，以提高 BESS 的日历寿命。所提出的策略基于荷电状态 (SOC)、健康状态 (SOH) 和最大容量来控制单个电池的充电和放电。控制器优先选择健康状况更好、容量更高的 BESS 进行操作，从而使储能系统具有更好的日历寿命。测试系统的模拟结果表明，BESS 的日历寿命总体提高了 57%。