摘要
针对电动汽车充电负荷的随机性和可再生能源出力的波动性问题,文章将电动汽车与可再生能源发电纳入微电网内,通过发挥电动汽车的馈能特性来平滑可再生能源出力波动。考虑应用比较广泛的光伏发电,利用电动汽车的移动负载和馈能特性来平滑光伏出力波动;同时针对电动汽车充放电过程中的充放电状态频繁切换现象提出一种调度模型,通过在目标函数中添加惩罚项来延长单次充电或者放电的持续时间以达到降低充放电状态的切换频率的目的,从而实现在平滑光伏出力的同时减少充放电状态的切换次数。最后,通过将仿真算例结果和传统方法对比,验证了所提调度模型的有效性。
In view of the randomness of electric vehicle charging loads and the fluctuation of renewable energy outputs,this paper involves electric vehicles and renewable energy generation into the microgrids,and smooths the fluctuation of renewable energy outputs by taking advantage of the electric vehicle’s energy supply characteristics.This paper considers the application of a wide range of photovoltaic power generation,uses the mobile loads and feeding characteristics of electric vehicles to smooth the fluctuation of photovoltaic outputs,and proposes a scheduling model for the frequent switches of charging and discharging states during charging and discharging of the electric vehicles.A penalty factor is added to the function to achieve the purpose of reducing the switching frequency of the charging and discharging states,thereby achieving a reduction in the times of switches of the charging and discharging states while smoothing the photovoltaic outputs.Finally,by comparing the simulation results with those of the traditional methods,the effectiveness of the proposed control strategy is verified,that is,the times of switches of charging and discharging states is reduced under the condition of reducing the fluctuation of photovoltaic outputs.
作者
吕广强
魏鑫杰
郭震
Lü Guangqiang;WEI Xinjie;GUO Zhen(School of Automation,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu Province,China)
出处
《电网技术》
EI
CSCD
北大核心
2021年第5期1894-1901,共8页
Power System Technology
基金
“江苏风力发电工程技术中心开放基金(ZK18-03-03)”项目的资助。
关键词
自适应
电动汽车
优化调度
光伏出力波动
充放电状态切换
self-adaption
electric vehicle
optimized dispatch
photovoltaic output fluctuation
charging and discharging state switches
