考虑储能充放电均衡度的风储联合调频控制策略  

Wind Turbine Storage Joint Frequency Modulation Control Strategy Considering the Balance of Energy Storage Charge and Discharge

作　　者：张小莲[1] 覃世球 陈冲 张仰飞[1] 郝思鹏[1] 武启川 ZHANG Xiaolian;QIN Shiqiu;CHEN Chong;ZHANG Yangfei;HAO Sipeng;WU Qichuan(School of Electic Power Engineering,Nanjing Institute of Techmology,Nanjing 211167,Jiangsu Province,China)

机构地区：[1]南京工程学院电力工程学院,江苏省南京市211167

出　　处：《电网技术》2024年第5期1938-1946,I0034-I0037,共13页Power System Technology

基　　金：国家自然科学基金项目(52107098)

摘　　要：针对储能分组调频的充放电不均衡问题,提出一种考虑储能均衡度的风储联合一次调频控制策略。基于充放电任务分组执行的储能调频原理,建立了最佳放电深度下的储能分组调频充放电数学模型。为改善储能充放电不均衡问题,以储能均衡度构建2组储能的充放电综合下垂控制系数,并设计风储协同控制策略,在储能均衡度偏差较大时通过风机转子动能调频弥补储能功率不足,提升一次调频效果。最后以频率差偏移量及储能均衡度偏移量等作为评价指标进行仿真分析,结果表明所提风储联合调频控制策略有效改善了储能均衡度,降低了其对储能使用寿命的损害程度,同时提升了调频效果。This paper proposes a wind storage joint primary frequency modulation control strategy that considers the energy storage balance to address the issue of imbalanced charging and discharging in energy storage group frequency modulation.Based on the energy storage frequency modulation principle of grouping charge and discharge tasks,a mathematical model for energy storage grouping frequency modulation charge and discharge at the optimal discharge depth was established.To improve the imbalance of energy storage charging and discharging,a comprehensive droop control coefficient for two sets of energy storage is constructed based on the energy storage balance,and a wind storage collaborative control strategy is designed.When the deviation of energy storage balance is large,the wind turbine rotor kinetic energy frequency modulation compensates for the insufficient energy storage power to improve the primary frequency modulation effect.Finally,simulation analysis used frequency difference offset and energy storage balance offset as evaluation indicators.The results showed that the proposed wind storage combined frequency modulation control strategy effectively improved energy storage balance reduced its damage to energy storage service life,and improved the frequency modulation effect.

关 键 词：风储联合系统 储能分组调频 一次调频 均衡度 储能寿命 

分 类 号：TM721[电气工程—电力系统及自动化]