在电网储能领域,获取储能系统负荷功率合理分配方案的关键是优化求解算法,若求解算法选择不合理或算法本身存在缺陷,求解过程会过于早熟,仅得到局部最优解而非全局最优解.为解决这一问题,提出一种微电网分布式储能系统负荷功率的动态分配方法.该方法先进行微电网分布式储能系统运行数据的采集;然后考虑负荷功率平均损耗率、荷电状态(state of charge,SOC)平衡系数,设置一个分布式储能系统多目标分配函数;最后在SOC、充放电量、充放电流这3个约束条件限制下,利用改进麻雀搜索算法求取多目标函数最优解,得出微电网分布式储能系统负荷功率的最优动态分配方案.结果表明:应用所提方法,负荷功率平均损耗相对更低,SOC平衡系数相对更高,多目标函数值相对更小.说明该分配方案更为科学、合理,更能保证储能系统的平稳运行,实现系统高质量供电.
Dynamic Load Power Allocation Method of Microgrid Distributed Energy Storage System
In the field of power grid energy storage,the key to obtain the rational load power distribution scheme of energy storage system is optimization algorithm.If the algorithm selection is not reasonable or the algorithm itself has defects,it will lead to premature solution process,and only the local optimal solution is obtained instead of the global optimal solution.To solve this problem,a dynamic load power distribution method of microgrid distributed energy storage system is proposed.The method firstly collects the operation data of microgrid distributed energy storage system.Then,considering the average load power loss rate and state of charge(SOC)balance coefficient,a multi-objective distribution function of distributed energy storage system is set up.Finally,under the three constraints of SOC,charging and discharging quantity,and charging and discharging current,the optimal solution of multiple objective functions is obtained by using the improved sparrow search algorithm,and the optimal dynamic load power distribution scheme of microgrid distributed energy storage system is obtained.The results show that with the proposed method,the average load power loss is relatively lower,SOC balance coefficient is relatively higher,and multi-objective function value is relatively smaller.It shows that the distribution scheme is more scientific and reasonable,and can ensure the stable operation of the energy storage system and realize the high quality power supply of the system.
microgriddistributed energy storage systemoperational data collectiondynamic distribution of load powerimproved sparrow search algorithm
万方数据
维普
