计及充电站无功补偿的配电网日前-实时协调优化模型  

Coordinated Day-ahead and Real-time Optimization Model for Distribution Network Considering Reactive Power Compensation of Charging Station

作　　者：王强钢[1] 田雨禾 王健[1] 胡方霞[2] 周念成[1] WANG Qianggang;TIAN Yuhe;WANG Jian;HU Fangxia;ZHOU Niancheng(State Key Laboratory of Power Transmission Equipment&System Security and New Technology(Chongqing University),Chongqing 400044,China;School of Electronic Information Engineering,Chongqing Technology&Business Institute,Chongqing 400052,China)

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市400044 [2]重庆工商职业学院电子信息工程学院,重庆市400052

出　　处：《电力系统自动化》2021年第17期27-34,共8页Automation of Electric Power Systems

基　　金：国家自然科学基金资助项目(52077017);重庆市教委科学技术研究项目(KJZD-K201804001)。

摘　　要：电动汽车通过充电桩的变流器接口接入配电网,变流器的无功功率调节能力有助于改善配电网电压分布和运行效率。文中提出一种计及充电站无功补偿的配电网日前-实时协调优化模型。首先,建立了以配电网运营成本最小为优化目标的日前优化模型,确定充电站日前有功功率、电容器组投切和有载调压挡位。再根据日前优化结果和电动汽车实时数据,建立配电网与充电站分层协调的电动汽车有功和无功功率实时优化模型,其中为确保每台电动汽车离开时能够达到目标荷电状态,考虑电动汽车前一时刻荷电状态的影响动态调整其当前荷电状态边界。最后,通过IEEE 33节点系统测试验证了所提模型的有效性。Electric vehicles are connected to distribution networks through converter interface of charging piles.The reactive power regulation capability of converters can improve the voltage profile and operation efficiency of the distribution network.This paper proposes a coordinated day-ahead and real-time optimization model for the distribution network considering the reactive power compensation of charging stations.Firstly,a day-ahead optimization model with the optimization objective of minimizing the operation cost of the distribution network is established.The day-ahead active power of the charging station,the switching of capacitor banks and on-load tap changer are determined.According to the results of day-ahead optimization and real-time parameters of electric vehicles,the real-time optimization model of active and reactive power of electric vehicles with the hierarchical coordination between the distribution network and the charging station is established.In order to ensure that each electric vehicle can reach the target state of charge when it leaves,the impact of the state of charge of the electric vehicle at the previous moment is considered to dynamically adjust the boundary of its current state of charge.Finally,the effectiveness of the proposed model is verified by the test in IEEE 33-bus system.

关 键 词：配电网 无功补偿 电动汽车 日前优化 实时优化 

分 类 号：TM73[电气工程—电力系统及自动化] U491.8[交通运输工程—交通运输规划与管理]