考虑新能源配网三相不平衡治理的电动汽车充电策略  

Charging Strategy of Electric Vehicles Considering Three-phase Unbalance Mitigation of Distribution Network With New Energy

作　　者：黄晶 王秀丽[1] 邵成成[1] 唐伦[1,2] 王一飞[3] HUANG Jing;WANG Xiuli;SHAO Chengcheng;TANG Lun;WANG Yifei(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an 710049,Shaanxi Province,China;State Grid Sichuan Electric Power Company,Chengdu 610041,Sichuan Province,China;Northwest Branch of State Grid Corporation of China,Xi’an 710049,Shaanxi Province,China)

机构地区：[1]西安交通大学电气工程学院,陕西省西安市710049 [2]国网四川省电力公司,四川省成都市610041 [3]国家电网有限公司西北分部,陕西省西安市710049

出　　处：《电网技术》2024年第9期3663-3672,I0042,I0043,共12页Power System Technology

基　　金：国家电网有限公司总部科技项目(5400-202099508A-0-0-00)。

摘　　要：针对大规模电动汽车和新能源并网引发的三相不平衡问题,提出考虑中压配网三相不平衡治理的电动汽车充电策略。首先,分别建立了电动汽车聚合商模型和多相配网模型;其次,提出三相平衡激励机制,鼓励电动汽车自发地帮助改善三相电压不平衡;然后,以最大化电动汽车利益为目标,考虑电动汽车充电约束和配网安全约束,建立电动汽车充电确定性优化模型;并进一步基于鲁棒优化理论研究新能源出力不确定性,建立电动汽车充电鲁棒优化模型;最后,采用改编的IEEE 13节点配网进行仿真验证。结果表明,所提出的充电策略能够有效降低配网三相电压不平衡与电动汽车用户成本,并在新能源出力不确定时保证配网的安全运行。Aiming at the three-phase unbalance problem caused by the large-scale integration of electric vehicles and new energy into the grid,a charging strategy for electric vehicles considering the three-phase unbalance mitigation in the medium voltage distribution network is proposed.Firstly,the electric vehicle aggregator model and multiphase distribution network model are established respectively;Secondly,a three-phase balance incentive mechanism is proposed to encourage electric vehicles to spontaneously help improve three-phase voltage unbalance;Then,with the goal of maximizing the benefits of electric vehicles,considering the constraints of electric vehicle charging and distribution network safety,a deterministic optimization model for electric vehicle charging is established;Furthermore,the uncertainty of new energy output is studied based on robust optimization theory,and a robust optimization model for electric vehicle charging is established;Finally,simulation verification is conducted using the adapted IEEE 13-node distribution network.The results show that the proposed charging strategy can effectively reduce the three-phase voltage unbalance in the distribution network and the cost of electric vehicle users,and ensure the safe operation of the distribution network when the output of new energy is uncertain.

关 键 词：电动汽车 新能源 三相不平衡 有序充电 不确定性 鲁棒优化 

分 类 号：TM721[电气工程—电力系统及自动化]