考虑多类型储能协同的重要负荷恢复方法

Critical load restoration method considering coordination of multiple types of energy storage

针对含多类型储能配电网大停电后利用分布式储能和电源进行重要负荷恢复的问题,考虑能量型和功率型储能的运行和功能特点,提出两阶段协同恢复方法,实现多类型储能协同互补,达到更优的恢复效果。第一阶段建立考虑能量型储能运行特性的多时段恢复混合整数二阶锥规划模型,确定各时段负荷恢复集合和各源计划功率曲线,即确定能量在时间维度的优化配置方案;第二阶段在第一阶段给出的能量分配方案基础上,考虑功率型储能的快速功率支撑,确定负荷因恢复突增时段的各源功率曲线,即确定功率的精细化配置方案。采用改进的IEEE 33节点配电网进行验证,结果验证了所提两阶段协同恢复方法的有效性。

Aiming at the critical load restoration using distributed energy storages and generators in distribu⁃tion networks with multiple types of energy storage after blackouts,considering the operational and functional characteristics of energy type and power type energy storage,a two-stage coordinated restoration method is proposed to realize the coordination and complementary among multiple types of energy storage and achieve better restoration effect.In the first stage,a mixed-integer second-order cone programing for multi-period res⁃toration problems considering operation characteristic of energy type energy storage is built,which can decide load restoration sets in each period and planned power curves for sources,i.e.the optimal allocation scheme of energy in the time dimension is determined.In the second stage,based on the energy allocation scheme given in the first stage,considering fast power support of the power type energy storage,the actual power curves for all sources during the periods of load pick-up are determined,i.e.the refined allocation scheme of power is determined.A modified IEEE 33-bus distribution system is used to verify the effectiveness of the proposed two-stage coordinated restoration method.