电工技术学报  2021, Vol. 36 Issue (zk2): 582-590    DOI: 10.19595/j.cnki.1000-6753.tces.L90150
电力系统与综合能源 |
电压不平衡条件下电动汽车充电机电流分析模型
王金浩1, 李胜文1, 常潇1, 杨超颖1, 徐少博2
1.国网山西省电力公司电力科学研究院 太原 030001;
2.新能源电力系统国家重点实验室(华北电力大学) 北京 102206
Electric Vehicle Charger Current Analysis Model under Unbalanced Voltage
Wang Jinhao1, Li Shengwen1, Chang Xiao1, Yang Chaoying1, Xu Shaobo2
1. State Grid Shanxi Electric Power Research Institute Taiyuan 030001 China;
2. State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China
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摘要 电网运行过程中,三相负载不平衡、线路参数不对称及不对称故障等因素均可能引起三相电压不平衡。不平衡电压作用下,电动汽车充电机输入电流将存在完全断续、完全连续及混合状态等不同续流状态。为精确且全面地描述电动汽车充电机在电压不平衡条件下的输入电流特性,以三相电流续流状态为依据,提出不平衡条件下涵盖全部运行范围的充电机运行状态划分方法;以此为基础,充分考虑网侧电压不平衡分量与谐波分量影响,建立包含无源功率因数校正环节、线路等效阻抗及交流侧滤波电感的充电机不同运行状态对应电流分析模型。理论计算与实验结果证明了所提模态划分方法的有效性和所提建模方法的精确性。
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王金浩
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常潇
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徐少博
关键词 电动汽车充电机电压不平衡运行状态划分方法电流分析模型    
Abstract:In the process of grid operation, unbalanced three-phase load, asymmetric line parameters and asymmetric fault may cause unbalanced three-phase voltage. With the influence of unbalanced voltage component, the input current of electric vehicle charger has different operation modes, including completely discontinuous state, completely continuous state and intermediate mixed state. In order to accurately and comprehensively describe the input current characteristics of the electric vehicle charger under the condition of voltage imbalance, according to the difference of three-phase current state, a method of operating state division covering all operating conditions of the charger is proposed. Considering the influence of unbalanced voltage component and harmonic component, the current analysis models of charger in different modes, including passive power factor correction section, line equivalent impedance and AC filter inductance, are established respectively. By comparing the theoretical calculation waveform of the proposed model with the measurement results of physical experiments, the validity of the proposed modal division method and the accuracy of the proposed model are verified.
Key wordsElectric vehicle charger    unbalanced voltage    division method of operation state    current analysis model   
收稿日期: 2020-06-30     
PACS: TM46  
基金资助:国网山西省电力公司科技资助项目(52053018000z)
通讯作者: 徐少博 男, 1994年生, 博士研究生, 研究方向为电能质量与电力电子变压器。E-mail:13021085107@163.com   
作者简介: 王金浩 男, 1975年生,硕士,教授级高工,研究方向为供电质量、新能源并网控制、微网控制、直流配电。E-mail:7wjh@163.com
引用本文:   
王金浩, 李胜文, 常潇, 杨超颖, 徐少博. 电压不平衡条件下电动汽车充电机电流分析模型[J]. 电工技术学报, 2021, 36(zk2): 582-590. Wang Jinhao, Li Shengwen, Chang Xiao, Yang Chaoying, Xu Shaobo. Electric Vehicle Charger Current Analysis Model under Unbalanced Voltage. Transactions of China Electrotechnical Society, 2021, 36(zk2): 582-590.
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