摘要
大量电动汽车接入配电网充电会对配电变压器的热点温度和使用寿命造成一定的影响,因此结合我国电动汽车发展规划,以中国华东某电动汽车试点城市为研究对象,研究了3种不同的电动汽车充电策略下大量电动汽车充电行为对配电变压器的影响。根据IEC标准,通过MATLAB建立了变压器热点-寿命损失评估模型。提出了基于粒子群算法的智能充电策略,在满足用户充电需求的前提下,使变压器的寿命损失最小。通过仿真试验分析了不同渗透率、环境温度和充电方式下电动汽车充电对配电电压器使用寿命的影响。通过仿真试验的数据结果可知,智能充电策略可以将电动汽车的寿命损失从1.31×103 min降低到1.83×102 min。与传统的电动汽车充电策略相比,所提出的智能充电策略可有效的减少配电变压器的寿命损失,验证了该基于粒子群的寿命损失优化智能充电策略的可行性。
A lot of electric vehicles which are plugged into the grid may significantly impair the hot-spot and the life of transformers. Therefore, taking a Chinese electric vehicle pilot city in East China as the research objects on the basis of China electric vehicles development project, we studied the influences on the operating life of the distribution transfor- mers with three different charging strategies. According to IEC standards, the transformer hot-spot and life evaluation model were established under MATLAB environment. Moreover, a smart charging strategy based on particle swarm optimization （PSO） was proposed in order to meet the demands of users for electric vehicle charging and to minimize the loss of life of the transformer. Then the results are analyzed under different market penetration, ambient temperatures and charging strategies of electric vehicles. It can be obtained that the smart strategy can decrease the loss life of the transfor- mer from 1.31×10^3 min to 1.83×10^2 min. The smart charging strategies can decrease the loss life of the transformer compared with the traditional charging strategies effectively. The results have also verified validity of the smart charging strategies.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2015年第11期3830-3835,共6页
High Voltage Engineering
关键词
电动汽车
配电变压器
热点
寿命损失
粒子群
智能充电
electric vehicles
distribution transformer
hotspot
loss of life
particle swarm optimization
smart charging
