面向降损场景的移动储能与网络重构协同优化策略  

Collaborative Optimization Strategy of Mobile Energy Storage Devices and Distribution Network Reconfiguration for Power Loss Reduction Scenarios

作　　者：李政麒 蔡晔 唐夏菲 曹一家 周致富 周潭 LI Zhengqi;CAI Ye;TANG Xiafei;CAO Yijia;ZHOU Zhifu;ZHOU Tan(School of Electrical&Information Engineering,Changsha University of Science&Technology,Changsha 410114,China;Hubei Energy Group New Energy Development Co.,Ltd.,Wuhan 430062,China;Power China Hubei Electric Engineering Co.,Ltd.,Wuhan 430040,China)

机构地区：[1]长沙理工大学电气与信息工程学院,长沙市410114 [2]湖北能源集团新能源发展有限公司,武汉市430062 [3]湖北省电力勘测设计院有限公司,武汉市430040

出　　处：《电力建设》2023年第9期137-148,共12页Electric Power Construction

基　　金：国家自然科学基金项目(52277076);国家自然科学联合基金项目(U1966207);国网嘉兴公司新型配电系统降损及灵活调度潜力测算研究(SGZJJXI0FZJS2100977);湖南省教育厅科学研究项目(21A0181)。

摘　　要：近年来,电网的节能降损工作受到广泛关注。随着灵活调节资源大规模接入配电网,充分挖掘灵活调节资源的降损潜力显得至关重要。提出一种面向降损场景的移动储能与网络重构两阶段协同优化策略:第一阶段,采用场景分析法刻画源荷不确定性,以综合网损最小为目标建立网络重构模型,并求解最优重构方案。由于配电网节点较多,为缩小搜索范围提升求解效率,提出一种网损灵敏度分析方法,并结合重构方案为移动储能预先筛选充放电节点集合。在第二阶段,以配电网网损及移动储能通行成本最小为目标函数,综合考虑移动储能的连接/通行状态约束、充放电功率/容量约束和电力网的功率平衡、潮流安全约束,构建交通网-电力网融合的移动储能充放电调度模型,并调用CPLEX求解器求解移动储能的通行及充放电功率调度方案。最后结合IEEE 33节点配电系统进行仿真分析,仿真结果表明有功网损降低552.17 kWh,降损幅度达31.9%,验证了所提策略的有效性。In recent years,the energy savings and loss reduction of power grids have been widely studied.As flexible regulated resources gain large-scale access to distribution networks,exerting the loss reduction potential of flexibly regulated resources by proposing a mobile energy storage device(MESD) and a network reconfiguration collaborative optimization strategy for loss reduction scenarios becomes necessary.The collaborative optimization strategy is divided into two stages.In the first stage,the source-load uncertainty is characterized by the scenario analysis method,and the network reconfiguration model is established with the minimum network loss as the objective function to obtain the network reconfiguration scheme.Owing to the large number of distribution network nodes,a network loss sensitivity analysis method is proposed to narrow the search range in order to enhance the efficiency of the solution,and the above reconfiguration scheme is combined with it to pre-screen the charging/discharging node set for MESD.In the second stage,the objective is to minimize the network loss of the distribution network and the traffic cost of mobile energy storage by considering the connection/operation state constraint,charging/discharging power or capacity constraint of the MESD,and the power balance and power flow safety constraint of the power network.A charging/discharging dispatching model of traffic network-power network convergence applicable to the MESD is constructed,and the CPLEX solver is invoked to solve the traffic planning and charging/discharging power dispatching plan of the MESD.Finally,a simulation analysis is performed using the IEEE 33-bus distribution system.The simulation results reveal that the active network loss of the system is reduced by 552.17 kWh,and the loss reduction range is reduced by 31.9%,verifying the effectiveness of the proposed strategy.

关 键 词：降损 移动储能 网络重构 网损灵敏度 

分 类 号：TM732[电气工程—电力系统及自动化]