计及设备特性的风氢系统混合储能容量优化

Wind-hydrogen system′s hybrid energy storage capacity optimization considering equipment characteristics

风电大规模并网使得电网的可靠性降低,导致电网消纳风电能力有限,风电与储能单元协调配合可提高风电消纳,文中提出了一种计及设备特性的风氢系统混合储能容量优化方法。首先分析电解槽效率特性,在电解槽最优工作区间,同时考虑超级电容动态响应快、循环寿命长的特性,制定了风氢系统混合储能能量管理策略;其次以系统总成本与系统可靠性指标作为目标函数,建立了风氢系统容量优化配置模型;最后利用混沌粒子群算法进行容量优化求解,得到兼具经济性与系统可靠性的风氢系统最佳储能容量组合。算例分析结果表明,文中提出的容量配置方法能充分利用设备特性,优化后的含风电电力系统能够经济可靠且高效运行。

Large-scale grid connection of wind power makes the reliability of the power grid reduced,which results in limited wind power consumption.As a matter of fact,the coordination of wind power and energy storage unit can improve wind power consumption,so a hybrid energy storage capacity optimization method for wind-hydrogen system considering equipment characteristics is presented.The efficiency characteristics of the electrolytic cell are analyzed.Considering the fast dynamic response of the supercapacitor and the long cycle life,a hybrid energy storage capacity management strategy for wind-hydrogen system is formulated in the optimal operating range of the electrolytic cell.A capacity optimization configuration model for wind-hydrogen system is established by taking the total cost of the system and its reliability index as the objective function.Finally,the optimal solution of the capacity is carried out with chaotic particle swarm algorithm to get the optimal combination of energy storage capacity of wind-hydrogen system with economy and system reliability.The results of example analysis show that the capacity allocation method proposed in this paper can make full use of the equipment characteristics,and the optimized wind power system can operate economically,reliably and efficiently.