由于国内的储能技术起步较晚，分布式电源中应用单一储能介质很难满足系统运行要求。基于某公司的光伏储能并网系统示范项目，以具有快速响应特性的超级电容器和具有大容量储能特性的锂离子电池为混合储能系统，以储能控制器为控制核心统一协调控制，使电能以可控功率按需送入电网。该系统可有效提高储能系统的功率输出能力，优化储能系统的充放电过程，延长储能电池的使用寿命，具有良好的应用及推广价值。%In the field of energy storage technologies, foreign countries started early, more achievement and experience in engineering project. Domestic energy storage technologies started late. In the distributed generation, using only one type energy storage is difficult to give good power performance for PV system. Based on our company grid-connected PV system photovoltaic with Li-ion battery and ultra-capacitor as hybrid energy storage system, it combined with the energy storage type of fast response characteristic and large capacity storage characteristics. The storage system controller coordinated power control between the energy storages and other power equipment in the system, which made the grid-connected power on demand and under control. The system can effectively increase the power output ability of PV generation system, decrease the frequency of charging and discharging for energy storage system, greatly extend the battery cycle life, has good application and popularization value.
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