电气工程学报 ›› 2021, Vol. 16 ›› Issue (4): 143-150.doi: 10.11985/2021.04.018

• 电力电子与电力传动 • 上一篇    下一篇

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三相Vienna整流器改进载波脉宽调制策略*

陈岚1,2(), 肖蕙蕙1,2(), 郭强1,2(), 向文凯1,2()   

  1. 1.重庆理工大学电气与电子工程学院 重庆 400054
    2.重庆市能源互联网工程技术研究中心 重庆 400054
  • 收稿日期:2021-09-08 修回日期:2021-11-12 出版日期:2021-12-25 发布日期:2022-02-10
  • 通讯作者: 郭强 E-mail:1335083504@qq.com;xhh@cqut.edu.cn;guoqiang@cqut.edu.cn;1334967843@qq.com
  • 作者简介:* 郭强,男,1984年生,博士,讲师。主要研究方向为大功率整流器、改进逆变器、汽车电子等。E-mail: guoqiang@cqut.edu.cn
    陈岚,女,1998年生,硕士研究生。主要研究方向为大功率整流器及控制技术等。E-mail: 1335083504@qq.com
    肖蕙蕙,女,1964年生,博士,教授。主要研究方向为电力电子传动、新能源发电与控制等。E-mail: xhh@cqut.edu.cn
    向文凯,男,1996年生,硕士研究生。主要研究方向为大功率整流器及控制技术等。E-mail: 1334967843@qq.com
  • 基金资助:
    * 重庆市教委科学技术研究(KJQN202001128);重庆理工大学研究生创新重点(clgycx20201004)

Modified Carrier-based Pulse Width Modulation Strategy for Three-phase Vienna Rectifier

CHEN Lan1,2(), XIAO Huihui1,2(), GUO Qiang1,2(), XIANG Wenkai1,2()   

  1. 1. School of Electrical and Electronic Engineering, Chongqing University of Technology, Chongqing 400054
    2. Chongqing Energy Internet Engineering Technology Research Center, Chongqing 400054
  • Received:2021-09-08 Revised:2021-11-12 Online:2021-12-25 Published:2022-02-10
  • Contact: GUO Qiang E-mail:1335083504@qq.com;xhh@cqut.edu.cn;guoqiang@cqut.edu.cn;1334967843@qq.com

摘要:

考虑到滤波电感、开关器件寄生参数和控制延迟等影响因素,整流器可能工作于非单位功率因数状态。此时,整流器若采用传统基于载波的脉宽调制(Carrier-based pulse width modulation, CB-PWM)策略,则会产生电压电流极性不一致的区域,进而导致开关管误动作、降低整流器性能。为此,基于传统CB-PWM策略提出一种改进载波脉宽调制策略(Modified carrier-based pulse width modulation, MCB-PWM)来改善整流器过零点畸变现象。首先,基于三相Vienna整流器工作原理,建立两相旋转(d-q)坐标系下的数学模型;其次,详细分析传统CB-PWM策略引起网侧电流过零点处波形畸变的原因,设计补偿措施,给出所提MCB-PWM策略的具体原理;此外,结合传统双闭环控制,形成系统整体控制框图;最后,利用Matlab/Simulink仿真,将传统CB-PWM策略与所提MCB-PWM策略进行对比,结果表明,所提MCB-PWM策略能显著改善输入电流过零点畸变现象,理论分析的正确性和有效性得到了验证。

关键词: Vienna整流器, 过零点畸变, CB-PWM, Simulink仿真

Abstract:

Considering the influence factors such as filter inductance, parasitic parameters of switching devices and control delay, so the rectifier may work in the state of non-unity power factor. At this time, if the rectifier adopts the traditional carrier-based pulse width modulation (CB-PWM) strategy, an area with inconsistent voltage and current polarity will be generated, which may cause the switching tubes to malfunction and the performance of the rectifier to decrease. For this reason, a modified carrier-based pulse width modulation strategy (MCB-PWM) is proposed based on the traditional CB-PWM strategy to improve the zero-crossing distortion of the rectifier. First, based on the working principle of the three-phase Vienna rectifier, a mathematical model is established in a two-phase rotating (d-q) coordinate system; secondly, the causes of waveform distortion at the grid-side current zero-crossing point caused by the traditional CB-PWM strategy is analyzed in detail, the compensation measure is designed, and the specific principle of the MCB-PWM strategy is given; in addition, the overall control block diagram of the system is formed by combining the traditional double closed-loop control; finally, the traditional CB-PWM strategy is compared with the MCB-PWM strategy by the simulation in Matlab/Simulink. The results show that the input current zero-crossing distortion phenomenon can be significantly improved by using the MCB-PWM strategy, and the correctness and effectiveness of the theoretical analysis are verified.

Key words: Vienna rectifier, zero-crossing distortion, CB-PWM, Simulink simulation

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