工程科学学报，第38卷，第2期：283-290,2016年2月 Chinese Journal of Engineering,Vol.38,No.2:283-290,February 2016 DOI:10.13374/j.issn2095-9389.2016.02.019:http://journals.ustb.edu.cn 一种PWM整流器虚拟磁链矢量重构方法 陈铁柱”，张勇军)四，肖雄”，罗凌波》 1)北京科技大学治金工程研究院，北京1000832)中车株洲电力机车研究所有限公司，株洲412001 ☒通信作者，E-mail:zhangyi(@usth.edu.cn 摘要电压型脉宽调制(pulse width modulation,PWM)整流器的虚拟磁链矢量可以由电网电压矢量进行积分得到，实际中 常用一阶低通滤波器代替纯积分环节来消除直流偏置误差和抑制高频次谐波干扰，但一阶低通滤波器的引入也会带来电网 电压幅值衰减和相移，从而导致虚拟磁链观测不准确.为消除一阶低通滤波器对虚拟磁链观测的影响，本文提出一种基于矢 量重构技术的观测方法，通过分析一阶低通滤波器的幅频特性和相频特性，分别对滤波后的电压矢量幅值和相位进行重构， 可实现虚拟磁链幅值和相位的精确估算.该方法应用于虚拟磁链定向的电压型脉宽调制整流器直接功率控制系统.仿真和 实验结果表明，与传统的一阶低通滤波器策略相比，该方法提高了虚拟磁链的估计精度，有效抑制了直流母线电压动态响应 波动，更有利于滤除网侧电流谐波 关键词电压型脉宽调制：整流器：矢量重构：功率控制 分类号TM461 Virtual flux vector reconstruction of a PWM rectifier CHEN Tie-zhu,ZHANG Yongjun,XIAO Xiong,LUO Ling-bo? 1)Engineering Research Institute,University of Science and Technology Beijing,Beijing 100083,China 2)CRRC Zhuzhou Institute Co.,Ltd.,Zhuzhou 412001,China Corresponding author,E-mail:zhangyj@ustb.edu.cn ABSTRACT The virtual flux space vector of a pulse width modulation (PWM)rectifier usually can be calculated by integrating the grid voltage vector.In practice,the pure integral part is replaced with a first-order low-pass filter (FOLP)to counteract the DC offset error and high frequency harmonic interference.However,the FOLP will result in the amplitude variation and phase shift of the grid voltage vector,which can lead to inaccurate observations of the virtual flux.In order to eliminate the effect of the FOLP on the grid voltage,this paper proposes an improved virtual flux orientation strategy based on the vector reconstruction principle.According to the amplitude-frequency characteristics and phase-frequency characteristics of the FLOP,the amplitude and phase of the voltage vector were separately reconstructed to improve the accuracy of the amplitude and phase values in virtual flux estimation.Furthermore,the proposed method was applied to a virtual flux oriented PWM rectifier direct power control system.Simulations and experimental results show that,compared with the traditional first-order low-pass filter,this method improves the accuracy of virtual flux estimation,effec- tively reduces the DC bus voltage fluctuation in dynamic response,and is more conducive to filter out grid current harmonics control. KEY WORDS pulse width modulation:rectifiers:vector reconstruction:power control 电压型脉宽调制(pulse width modulation,PWM)整源滤波-及无功补偿、高性能交流传动B-等领域得 流器与相控整流器相比，具有能抑制谐波污染，可单位 到越来越广泛的应用.基于直接功率原理，现有的电 功率因数状态运行，能量双向流动等优点，在整流、有 压型脉宽调制整流器控制方法可以归纳为两类：电压 收稿日期：2014-12-02 基金项目：“十二五”国家科技支撑计划项目资助项目(2012BAF09B02)工程科学学报，第 38 卷，第 2 期: 283--290，2016 年 2 月 Chinese Journal of Engineering，Vol． 38，No． 2: 283--290，February 2016 DOI: 10． 13374 /j． issn2095--9389． 2016． 02． 019; http: / /journals． ustb． edu． cn 一种 PWM 整流器虚拟磁链矢量重构方法 陈铁柱1) ，张勇军1) ，肖 雄1) ，罗凌波2) 1) 北京科技大学冶金工程研究院，北京 100083 2) 中车株洲电力机车研究所有限公司，株洲 412001  通信作者，E-mail: zhangyj@ ustb． edu． cn 摘 要 电压型脉宽调制( pulse width modulation，PWM) 整流器的虚拟磁链矢量可以由电网电压矢量进行积分得到，实际中 常用一阶低通滤波器代替纯积分环节来消除直流偏置误差和抑制高频次谐波干扰，但一阶低通滤波器的引入也会带来电网 电压幅值衰减和相移，从而导致虚拟磁链观测不准确． 为消除一阶低通滤波器对虚拟磁链观测的影响，本文提出一种基于矢 量重构技术的观测方法，通过分析一阶低通滤波器的幅频特性和相频特性，分别对滤波后的电压矢量幅值和相位进行重构， 可实现虚拟磁链幅值和相位的精确估算． 该方法应用于虚拟磁链定向的电压型脉宽调制整流器直接功率控制系统． 仿真和 实验结果表明，与传统的一阶低通滤波器策略相比，该方法提高了虚拟磁链的估计精度，有效抑制了直流母线电压动态响应 波动，更有利于滤除网侧电流谐波． 关键词 电压型脉宽调制; 整流器; 矢量重构; 功率控制 分类号 TM461 Virtual flux vector reconstruction of a PWM rectifier CHEN Tie-zhu1) ，ZHANG Yong-jun1)  ，XIAO Xiong1) ，LUO Ling-bo2) 1) Engineering Ｒesearch Institute，University of Science and Technology Beijing，Beijing 100083，China 2) CＲＲC Zhuzhou Institute Co． ，Ltd． ，Zhuzhou 412001，China  Corresponding author，E-mail: zhangyj@ ustb． edu． cn ABSTＲACT The virtual flux space vector of a pulse width modulation ( PWM) rectifier usually can be calculated by integrating the grid voltage vector． In practice，the pure integral part is replaced with a first-order low-pass filter ( FOLP) to counteract the DC offset error and high frequency harmonic interference． However，the FOLP will result in the amplitude variation and phase shift of the grid voltage vector，which can lead to inaccurate observations of the virtual flux． In order to eliminate the effect of the FOLP on the grid voltage，this paper proposes an improved virtual flux orientation strategy based on the vector reconstruction principle． According to the amplitude--frequency characteristics and phase--frequency characteristics of the FLOP，the amplitude and phase of the voltage vector were separately reconstructed to improve the accuracy of the amplitude and phase values in virtual flux estimation． Furthermore，the proposed method was applied to a virtual flux oriented PWM rectifier direct power control system． Simulations and experimental results show that，compared with the traditional first-order low-pass filter，this method improves the accuracy of virtual flux estimation，effec￾tively reduces the DC bus voltage fluctuation in dynamic response，and is more conducive to filter out grid current harmonics control． KEY WOＲDS pulse width modulation; rectifiers; vector reconstruction; power control 收稿日期: 2014--12--02 基金项目: “十二五”国家科技支撑计划项目资助项目( 2012BAF 09B02) 电压型脉宽调制( pulse width modulation，PWM) 整 流器与相控整流器相比，具有能抑制谐波污染，可单位 功率因数状态运行，能量双向流动等优点，在整流、有 源滤波［1--2］及无功补偿、高性能交流传动［3--4］等领域得 到越来越广泛的应用． 基于直接功率原理，现有的电 压型脉宽调制整流器控制方法可以归纳为两类: 电压