摘要
分析了车载充电机接入小区低压配电网产生的谐波特征。基于Simulink平台建立了含车载充电机的住宅区传统三相配电网和新型单相配电网仿真模型,结合对配电变压器阻抗特性的研究,对比分析了2种配电模式下不同数量电动汽车接入充电产生谐波的变化规律。结果表明:随着车载充电机接入数量增多,2种配电模式下的谐波电流变化平缓,但电压畸变率均明显增大;在相同数量充电机接入情况下,配电容量越大,系统电压畸变越小;单相配电的电压谐波畸变较三相配电可增幅70%以上,对谐波耐受力较差。
The characteristics of harmonics caused by connecting EV（Electric Vehicle） on-board chargers to residential distribution network are analyzed. The models for simulating the connection of EV on-board chargers to traditional three-phase and new single-phase distribution networks are built based on Simulink platform and,combined with the analysis of distribution transformer impedance characteristics,the variation of generated harmonics along with the number of connected EV chargers is compared between two distribution models. Results show that,the harmonic current changes gently while the voltage distortion rate increases significantly along with the increase of charging EV number for both models;with the same number,the greater the distribution capacity is,the smaller the voltage distortion will be;the harmonic voltage distortion of single-phase distribution is greater than that of three-phase distribution,with growth of 70% above and showing lower tolerance to harmonics.
出处
《电力自动化设备》
EI
CSCD
北大核心
2014年第2期13-18,共6页
Electric Power Automation Equipment
基金
国家自然科学基金重点资助项目(61034007)
国家自然科学基金资助项目(61104034
61273097)
高等学校博士学科点专项科研基金资助项目(20120131130007)~~
关键词
电动汽车
车载充电机
充电
住宅区配电
谐波分析
变压器容量
electric vehicles
on-board charger
charging
residential distribution
harmonic analysis
transformer capacity
