摘要
电动汽车充电负荷和风电的随机性与时变性将对电力系统的运行状态产生重要影响。为此,分析了影响电动汽车充电负荷特性的主要因素,根据车辆调查数据对电动汽车用户行驶特性进行建模,基于变异系数建立了电动汽车充电负荷、风电出力和基础负荷的动态概率模型,采用半不变量法概率潮流研究了含电动汽车充电负荷和风电的电力系统动态概率特性,分析了5种不同情形下系统支路潮流和节点电压的运行状态。研究结果表明,采用动态概率模型能获得更全面的潮流分布情况,电动汽车充电负荷和风电出力对系统动态运行特性有重要影响,且不同的电动汽车充电控制策略对系统的影响也不同。
The randomness and time-variability of electric vehicle charging load（EVCL） and wind power will greatly influence the operating conditions of power grid connected with them.The main factors influencing the characteristic of EVCL are analyzed and according to the survey data of vehicles the modeling of EV drivers’ driving characteristic is modeled.Based on the coefficient of variation,a dynamic probabilistic models of EVCL,wind power output and power system basic load are built,and then based on probabilistic power flow the dynamic probabilistic characteristic of power grid connected with EVCL and wind power is researched by cumulant method and operating states of branch power flows and nodal voltages under five different conditions are analyzed.Research results show that using the proposed dynamic probabilistic model a more comprehensive power flow distribution can be obtained;there are notable influences of EVCL and wind power output on dynamic operation of power grid;influences of various control strategies for EVCL on power grid are different.
出处
《电网技术》
EI
CSCD
北大核心
2013年第3期590-596,共7页
Power System Technology
基金
国家重点基础研究发展计划项目(973计划)(2009CB219701)
国家863高技术基金项目(2011AA05A101
2011AA05A109)
国家自然科学基金项目(50937002)
中国博士后科学基金资助项目(20110491133)
Alstom公司项目(CTC-HUST-002)~~
关键词
电动汽车充电负荷
风电
动态概率特性
半不变量法
electric vehicle charging load（EVCL）
wind power
dynamic probabilistic characteristic
cumulant method
