摘要
为解决配电网的建设速度与EV的普及速度失配问题,进行了配电网充电负荷接纳能力评估方法与优化策略研究。首先,以充电桩接纳能力来衡量配电网的充电负荷接纳能力,从配电网侧、充电桩侧和用户侧分析了配电网充电桩接纳能力影响因素。其次,建立基于充电桩数量的充电负荷评估模型,基于充电桩数和车桩比计算充电负荷,进而利用充电负荷和配电网耦合关系分析配电网运行风险。再次,综合考虑电压和电流越限风险以及配变过载风险建立配电网综合运行风险,以作为充电桩接纳能力的量化指标。然后,从电网侧提出网络重构、配电网扩容和双馈线共同供电等措施来改善配电网的充电桩接纳能力。最后,通过仿真分析验证了所提出充电桩接纳能力评估模型和优化措施的有效性。
To solve the problem of mismatch between the construction of a grid and the popularity of electric vehicles(EVs),this paper conducts research on the assessment method and optimization strategies of charging load acceptance capacity of a distribution network.First,the charging load acceptance capacity of the distribution network is measured by the charging pile acceptance capacity,and the factors influencing that capacity of the distribution network are analyzed from the distribution network,charging pile and user sides.Secondly,a charging load assessment model based on the number of charging piles is established.The charging load is calculated based on the number of charging piles and vehicle-to-pile ratio,and then the coupling relationship between charging load and distribution network is used to analyze the operational risk of the distribution network.Furthermore,a comprehensive operational risk of the distribution network is established by taking into account the voltage and current crossing risk and the distribution transformer overload risk as a quantitative indicator of the charging pile acceptance capacity.This is proposed as a quantitative indicator of charging pile acceptance capacity.Then,from the grid side,strategies such as network reconstruction,distribution network expansion,and two feeders jointly supplying power are proposed to improve the charging pile acceptance capacity.Finally,through simulation analysis,the effectiveness of the charging pile acceptance capacity evaluation model and optimization strategy is verified.
作者
曲大鹏
范晋衡
刘琦颖
刘轩
邓文扬
QU Dapeng;FAN Jinheng;LIU Qiying;LIU Xuan;DENG Wenyang(Guangzhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Guangzhou 510620,China;Guangzhou Power Electrical Engineering Technology Co.,Ltd.,Guangzhou 510670,China)
出处
《电力系统保护与控制》
CSCD
北大核心
2022年第3期131-139,共9页
Power System Protection and Control
基金
国家自然科学基金项目资助(51777077)
广东电网有限责任公司广州供电局科技项目资助(GZHKJXM20180072)。
关键词
充电桩
电动汽车
接纳能力
风险
配电网
charging pile
electric vehicle
acceptance capacity
risk
distribution network
