随着配电网中电动汽车规模化接入,其无序充电行为引发的充电负荷增长趋势日益显著,导致配电变压器过载、配电台区网损增大以及负载不均衡等诸多问题.文章围绕配电网台区电动汽车接纳能力提升问题开展研究,针对电动汽车的无序充电行为导致配电网运行经济性差、安全运行风险高等问题,提出了基于柔性互联的多配电台区电动汽车充电设施协同优化运行方法,考虑用户参与意愿、充电费用、用户满意度、配电网安全性等,结合智能软开关(soft open point,SOP)功率互送的能力,实现了台区间的互联互供.算例分析证明,文章的方法可降低变压器过载风险,大幅增加台区运行的经济性,通过台区间的柔性互联设备实现充电负荷转移与灵活资源共享,从而大幅提升配电台区对电动汽车的接纳能力.
Flexible Co-operation Method for Electric Vehicle Charging Facilities in Multiple Transformer Areas
With the large-scale access of electric vehicles in the distribution network,the trend of charging load growth caused by their disorderly charging behavior is becoming more and more significant,which leads to many problems such as overloading of distribution transformers,increasing network loss of distribution transformer areas,and load imbalance.In this paper,we focus on the improvement of EV acceptance capacity in distribution transformer areas,and propose a cooperative optimization method for EV charging facilities in multi-distribution transformer areas based on flexible interconnection,taking into account the willingness of users to participate,the charging cost,user satisfaction,and the security of the distribution network,combining with the power of SOP and the ability of mutual transmission,and realizing the optimization of EV charging facilities in multiple distribution transformer areas,taking into account the willingness of users to participate,the charging cost,user satisfaction,and the security of the distribution network.The interconnection and mutual supply between areas is realized by considering the willingness of users to participate in charging,user satisfaction,security of distribution network,etc.,and combining with the power of SOP.Example analysis proves that this paper's method can reduce the risk of transformer overload,greatly increase the economics of area operation,and achieve charging load transferring and flexible resource sharing through flexible interconnection equipment between areas,thus greatly improving the acceptance capacity of EVs in distribution transformer areas.
distribution networkelectric vehiclelow voltage transformer areaflexible interconnectionoptimization of operation
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维普
