The participation of wind power and energy storage in primary frequency regulation of power grid can make better use of the advantages of wind power and energy storage for frequency regulation,which has gradually become a new trend.However,there are some problems in the coordination of wind power system and energy storage,such as insufficient utilization of energy storage and mismatch of wind power and energy storage power.Aiming at the above problems,an improved wind-storage combined primary frequency control strategy was proposed.Through frequency separation,design of six operating conditions and the switching rules,optimization of wind power and energy storage adaptive droop coefficient,the charging and discharging function of energy storage battery was realized,the power mismatch problem in operating condition switching was improved,and the excessive compensation of power shortage caused by this was avoided.Finally,the wind energy utilization efficiency and frequency regulation effect of the proposed control strategy and the existing control strategy were compared through simulation and wind storage experimental platform,and the effectiveness and superiority of the proposed control strategy were verified.
关键词
风储联合/一次调频/功率匹配/自适应下垂系数
Key words
wind-storage combined system/primary frequency regulation/power matching/adaptive droop coefficient
维普
万方数据