针对光储联合发电系统中的混合储能，基于频率协调，给出了一种电池和超级电容的功率分配控制方法，记及储能的荷电状态(State of Charge, SOC)，提出了多储能单元的出力分摊方法。基于频率协调控制，利用电池和超级电容平抑光伏出力的中频和高频分量，控制光储联合系统输出功率的带宽，降低光伏对电网的冲击。基于SOC的功率协调控制，分配光储联合发电系统中多个储能单元，按照其可用容量合理分担出力。使光储联合发电系统工作于电网调度模式和光伏平抑模式，利用PSCAD/EMTDC验证了所提协调控制方法的有效性和可行性。
英文摘要:
Aiming to the coordinated control of hybrid energy storage systems (ESS) for photovoltaic (PV) applications, a frequency-based cooperative control is employed, and an adaptive power-sharing control including State of Charge (SOC) of ESS is proposed. Based on the frequency cooperative control, the middle- and high-frequency power of PV are shared by batteries and super-capacitors, respectively. The total output power of the PV-ESS system is smoothed. Due to the SOC-based power cooperative control, the desired power generation of hybrid ESS are assigned to batteries and super-capacitors according to their capacities. As a result, the PV-ES system can operate at utility-scheduling mode or PV power-smoothing mode. Simulated results by using PSCAD/EMTDC are presented to verify the effectiveness and the validity of the proposed controllers.