| 引用本文: | 朱学贵,覃 阳,苏向丰,郑 可,付志红.电动汽车充电机对电能计量的影响[J].电力自动化设备,2015,35(6): |
| ZHU Xuegui,QIN Yang,SU Xiangfeng,ZHENG Ke,FU Zhihong.Impact of electric vehicle charger on electric energy metering[J].Electric Power Automation Equipment,2015,35(6): |
|
| 摘要: |
| 建立考虑线路阻抗和配电变压器的电动汽车充电机模型，仿真分析了充电机直流大功率充电和脉冲充电对电能计量的影响。仿真分析结果表明：恒流充电时充电机向电网注入谐波功率，注入功率的大小随充电功率和线路阻抗的增大呈上升趋势，但总体上占基波功率比值很小，为0.012 %，对电能计量造成的影响有限；充电功率变化时谐波功率的特点与恒流充电时基本相同；脉冲充电方式下，谐波电流受脉冲充电频率影响较大，高频脉冲充电时含有大量偶次谐波与间谐波，采用积分算法原理进行电能计量的误差大于0.5%。 |
| 关键词: 电动汽车 充电机 充电 计量 谐波功率 谐波分析 非线性负荷 |
| DOI： |
| 分类号: |
| 基金项目:输配电装备及系统安全新技术国家重点实验室自主研究项（2007DA10512714103） |
|
| Impact of electric vehicle charger on electric energy metering |
|
ZHU Xuegui1, QIN Yang1, SU Xiangfeng1, ZHENG Ke2, FU Zhihong1
|
|
1.State Key Laboratory of Power Transmission Equipment & System Security and New Technology，Chongqing University，Chongqing 400044，China;2.Ｃhongqing Electric Power Research Institute，Chongqing 401123，China
|
| Abstract: |
| An EV（Electric Vehicle） charger model including line impedance and distribution transformer is built，and its impact on the electric energy metering is simulated and analyzed for both DC large-power charging and pulse charging modes. Results show that，during the constant-current charging，EV charger injects harmonic power into power grid，which increases along with the increase of charging power and line impedance，but causes limited impact on the electric energy metering because the ratio of harmonic power to fundamental power is only 0.012 %；during the varying-power charging，the injected harmonic power is similar to that during the constant-current charging；during the pulse charging，the injected harmonic power is strongly affected by the frequency，when the frequency is high，the injected harmonic power contains more even-order harmonics and inter-harmonics，which causes the error of electric energy measured by the integral algorithm is larger than 0.5 %. |
| Key words: electric vehicles charger charging metering harmonic power harmonic analysis nonlinear load |
