电工技术学报  2018, Vol. 33 Issue (12): 2758-2766    DOI: 10.19595/j.cnki.1000-6753.tces.160517
电力电子 |
一种抑制PWM整流器起动冲击电流的缓给定方法
刘博, 贲洪奇, 白银龙
哈尔滨工业大学电气工程及自动化学院 哈尔滨 150001
A Slow Given Method to Suppress the Start-Up Inrush Current of PWM Rectifier
Liu Bo, Ben Hongqi, Bai Yinlong
College of Electrical Engineering and Automation Harbin Institute of Technology Harbin 150001 China
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摘要 传统的三相电压型PWM整流器常采用带有前馈解耦的电压电流双闭环PI控制方式,在该方式下数字控制相对简单且易于调节。但是在整流器起动过程中,由不控整流向PWM整流转换时,直流母线电压给定量是一个阶跃信号,导致母线电压迅速增加,产生冲击电流,使开关器件承受很大的电流应力,影响系统的安全与可靠性。为解决这一问题,在建立PWM整流系统数学模型基础上分析冲击电流的产生机理,提出从根本上抑制冲击电流的缓给定方法,仿真和实验结果验证了所提方法合理性和有效性。
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刘博
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关键词 PWM整流器前馈解耦起动冲击电流    
Abstract:The double closed loop proportional-integral (PI) control with feedforward decoupling is usually used in traditional three-phase voltage-source pulse width modulation (PWM) rectifier. Its digital control is relatively simple and easy to regulate. However, the given value of direct current (DC) bus voltage is a step-function signal during the start-up process from uncontrolled rectifying to PWM rectifying, causing rapidly increase of bus voltage and generating inrush current. As a result, the switching devices withstand large current stress, which affects the security and reliability of system. Therefore, this paper first analyzes the generation mechanism of inrush current based on the mathematical model of PWM rectifier system. A slow given method that can fundamentally suppress the inrush current is then proposed. Finally, the simulation and experimental results verify the proposed method.
Key wordsPWM rectifier    feedforward decoupling    start-up    inrush current   
收稿日期: 2016-04-18      出版日期: 2018-06-22
PACS: TM461  
作者简介: 刘 博 男,1992年生,博士研究生,研究方向为三相PWM整流器稳定性及其控制技术。E-mail: hiteelb@hotmail.com(通信作者);贲洪奇 男,1965年生,教授,博士生导师,研究方向为高频功率变换技术及有源功率因数校正技术。E-mail: benhq@hit.edu.cn
引用本文:   
刘博, 贲洪奇, 白银龙. 一种抑制PWM整流器起动冲击电流的缓给定方法[J]. 电工技术学报, 2018, 33(12): 2758-2766. Liu Bo, Ben Hongqi, Bai Yinlong. A Slow Given Method to Suppress the Start-Up Inrush Current of PWM Rectifier. Transactions of China Electrotechnical Society, 2018, 33(12): 2758-2766.
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