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1.智能电网教育部重点实验室(天津大学),天津市 300072
2.新能源与储能运行控制国家重点实验室(中国电力科学研究院有限公司),北京市 100192
3.国网安徽省电力有限公司经济技术研究院,安徽省合肥市 230000
Received:10 December 2020,
Revised:2021-05-27,
Published Online:13 July 2021,
Published:25 September 2021
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张宇轩,郭力,刘一欣等.电动汽车充电负荷概率分布的数值建模方法[J].电力系统自动化,2021,45(18):61-70.
ZHANG Yuxuan,GUO Li,LIU Yixin,et al.Numerical Modeling Method for Probability Distribution of Electric Vehicle Charging Load[J].Automation of Electric Power Systems,2021,45(18):61-70.
张宇轩,郭力,刘一欣等.电动汽车充电负荷概率分布的数值建模方法[J].电力系统自动化,2021,45(18):61-70. DOI: 10.7500/AEPS20201210011.
ZHANG Yuxuan,GUO Li,LIU Yixin,et al.Numerical Modeling Method for Probability Distribution of Electric Vehicle Charging Load[J].Automation of Electric Power Systems,2021,45(18):61-70. DOI: 10.7500/AEPS20201210011.
传统电动汽车充电负荷概率建模通常采用蒙特卡洛模拟方法,存在耦合参数多和计算耗时大等问题。为此,提出一种基于车辆集合的整体荷电状态(CSOC)概率分布特性的电动汽车充电负荷概率分布数值计算方法。首先,将车辆的多次行程拆解为独立的单次行程进行起止点(OD)分析,消除多行程间建模中的变量耦合误差。其次,建立考虑车辆出行特性的CSOC动态概率模型,确定各行程的起始荷电状态概率密度函数;结合大数定律得到充电负荷时空概率分布函数。最后,以12节点路网案例计算充电负荷时空概率分布。结果表明,较传统蒙特卡洛模拟方法,所提方法消除了耦合误差问题,并在保证计算精度的前提下大幅提高了计算效率。
Traditional probability modeling of electric vehicle charging load is usually based on the Monte Carlo simulation method
which faces the problems such as a large number of coupling parameters and long time computing. To this end
this paper proposes a numerical calculation method for the probability distribution of electric vehicle charging load based on probability distribution characteristics of the combined state of charge (CSOC) for vehicle collection. Firstly
multiple trips of the same vehicle are disassembled into independent single trips
and origin destination (OD) analysis is carried out on single trips to reduce the parameter coupling error in the modeling of multiple trips. Secondly
the CSOC dynamic probability model considering the probability characteristics of travelling of vehicles is established to determine the probability density function of the initial state of charge (SOC) for single trips. Then
combining the law of large numbers
the spatial-temporal probability distribution function of electric vehicle charging load is established. Finally
a 12-bus road network case is used to calculate the spatial-temporal probability distribution of the charging load. The results show that compared with the traditional Monte Carlo simulation method
the proposed method does not have the problem of coupling error
and greatly improves the calculation efficiency on the premise of ensuring the calculation accuracy.
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