电动汽车接入方式对配电网静态电压稳定裕度的影响分析

摘要

电动汽车负荷具有随机性、间歇性和源荷两重性,当其大规模无序接入配电网时,对电网的安全稳定和经济运行将产生严重影响.本文分析了不同类型电动汽车用户的行为特性,建立了电动汽车功率需求模型,采用蒙特卡洛法预测了未来配电网中各类电动汽车负荷的时空分布规律,在此基础上提出了配电网对电动汽车适应能力的测评方法.以IEEE33节点配电网应用为例,分析了电动汽车充电负荷在不同接入方式下对电网静态电压稳定裕度的影响.%Electric vehicle,if accessed in the distribution network disorderly and extensively,will influence the safe,stable and economic operation of the network,due to the characteristics of its randomness,intermittency and duality with source and load.In this paper,the power demand models of different electric vehicles were established by analyzing the behavior of electric vehicle loads attributed to different users,and the spatial-temporal distribution pattern of various electric vehicle loads in the distribution network was predicted with the MonteCarlo method.Based on this regular pattern,an evaluation method for the adaptability of the distribution network to electric vehicles was proposed.Finally,the influence of electric vehicle loads under different access modes on the static voltage stability margin was tested with the IEEE33 node distribution network.