摘要
针对大规模电动汽车接入电网时,无序的充电或放电会引发电网负荷波动加剧的问题,提出了一种以实时电价为背景的电动汽车参与电网负荷调节的分布式充放电策略。在该策略中电网信息中心收集电动汽车的信息并向其提供实时的电网负荷数据,首先电网信息中心根据电力需求价格弹性理论进行当日负荷估计,在此基础上电动汽车的三端控制器从电网信息中心获取当日负荷曲线,并结合未来行驶里程和当前车载电池组荷电状态(SOC)值,以电网的峰谷差最小为目标,用动态插值计算的方法计算得出三端控制器的充放电时刻,实时反馈电网信息中心。最后根据2009年美国家庭出行数据,通过蒙特卡洛模拟法获得大量用户的出行链进行模拟仿真,验证了该策略能有效控制车辆自身的充放电时刻达到调节电网负荷的目的,使电网负荷波动的标准差降低了19%。
Aiming at the problem that the disordered charging or discharging will induce increased fluctuation of the grid load when a large-scale electric vehicle is connected to the power grid,a distributed charging and discharging strategy for the electric vehicle to participate in the grid load regulation based on the real-time electricity price is proposed.In this strategy,the grid information center collects the information of the electric vehicle and provides it with the real-time grid load data.Firstly,the grid information center carries out the daily load estimation according to the elasticity theory of electricity demand price,based on which,the three-terminal controller of the electric vehicle obtains the current day load curve from the grid information center and combines the future driving mileage and the current vehicle battery pack SOC value to minimize the peak-to-valley difference of the power grid.Then the dynamic interpolation calculation method is used to calculate the charging and discharging timing of the three-terminal controller and the in time feedback information will be transferred to the grid information center.Finally,according to the 2009 American family travel data,the Monte Carlo simulation method is used to simulate the travel chain of a large number of users,which proves that the strategy can effectively control the vehicle’s own charging and discharging time to achieve the purpose of regulating the grid load,so that the standard deviation of grid load fluctuation is reduced by 19%.
作者
蒋新柱
翟涌
JIANG Xinzhu;ZHAI Yong(School of Mechanical Engineering,Beijing Institute of Technology,Beijing 100081,China)
出处
《中国科技论文》
CAS
北大核心
2018年第22期2527-2532,共6页
China Sciencepaper
关键词
车载三端控制器
充放电控制策略
电网负荷调节
实时电价
vehicle three-terminal controller
charge and discharge control strategy
grid load regulation
real-time electricity price
