Scholarlink

Three-phase two-level voltage source PWM rectifiers are widely used in medium and high power applications. The traditional double closed loop PI control will generate a large inrush current when starting, and will show poor dynamic response characteristics when the load suddenly increases or unloads. In order to solve the above problems, this paper proposes an improved control strategy based on the mathematical model of the rectifier. This strategy is given by the DC reference voltage gentle curve and combined with the voltage outer loop design using the square of the voltage as the control quantity; in addition, a reactive current feedforward compensation mechanism based on the capacitor current is introduced during system startup. The improved strategy suppresses the integral saturation phenomenon of the PI controller, significantly reduces the start-up current impact, and improves the stability and operational reliability of the system. The simulation results verify the effectiveness and feasibility of the proposed method, and provide reliable technical support for the practical engineering application of PWM rectifiers.

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Start-Up Inrush Current Suppression and Dynamic Performance Improvement of Three-Phase PWM Rectifier

  • 会议论文

  • 发表日期：

    2026年

查看全文
  • Erke Luan,
  • Lijun Diao,
  • Qiya Wu,
  • Jia Zhang,
  • Benchao Zhu,
  • Mingchao Zhou,
  • Lei Wang

摘要

Three-phase two-level voltage source PWM rectifiers are widely used in medium and high power applications. The traditional double closed loop PI control will generate a large inrush current when starting, and will show poor dynamic response characteristics when the load suddenly increases or unloads. In order to solve the above problems, this paper proposes an improved control strategy based on the mathematical model of the rectifier. This strategy is given by the DC reference voltage gentle curve and combined with the voltage outer loop design using the square of the voltage as the control quantity; in addition, a reactive current feedforward compensation mechanism based on the capacitor current is introduced during system startup. The improved strategy suppresses the integral saturation phenomenon of the PI controller, significantly reduces the start-up current impact, and improves the stability and operational reliability of the system. The simulation results verify the effectiveness and feasibility of the proposed method, and provide reliable technical support for the practical engineering application of PWM rectifiers.