基于混合储能的光伏微电网协调控制策略  

Coordinated Control Strategy of Photovoltaic Microgrid Based on Hybrid Energy Storage

作　　者：祝龙记[1] 郁子扬 ZHU Longji;YU Ziyang(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《电工技术》2022年第20期45-48,52,共5页Electric Engineering

摘　　要：为了解决光伏发电和负载的随机性、间接性造成的直流母线电压波动和系统稳定运行的问题,依据光储直流微电网系统内各变换器的控制策略将系统内运行分为六种工作模式使各变换器协调运行,通过直流母线电压值和储能模块的SOC(State of Charge)实现各变换器工作模式的平滑切换,保证系统的稳定运行;利用超级电容和蓄电池组成混合储能模块,用超级电容电流环补偿蓄电池电流环误差,提高系统的动态响应速度。仿真验证了该控制策略的有效性。The randomness and indirectness of photovoltaic power generation and load will cause DC bus voltage fluctuation and affect the stable operation of the system.To solve this problem,according to the control strategy of each converter in the photovoltaic-storage-DC microgrid system,the operation in the system is divided into six working modes,so that each converter can operate in coordination.Through the DC bus voltage value and the SOC(State of Charge)of the energy storage module,the smooth switching of the working modes of each converter is realized to ensure the stable operation of the system.The hybrid energy storage module is composed of supercapacitor and battery,and the supercapacitor current loop is used to compensate the battery current loop error to improve the dynamic response speed of the system.Simulations verify the effectiveness of the control strategy.

关 键 词：光伏微电网 混合储能 协调控制 参考电流优化 功率平衡 

分 类 号：TK01[动力工程及工程热物理]