Small-signal multi-frequency model for grid-connected inverter system with PWM effect

Guocheng San; Wenlin Zhang; Ran Luo; Xiaoqiang Guo; Huanhai Xin; Elisabetta Tedeschi; Mariusz Malinowski

doi:10.17775/CSEEJPES.2019.03020

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Small-signal multi-frequency model for grid-connected inverter system with PWM effect

更新时间：2025-12-18

- Small-signal multi-frequency model for grid-connected inverter system with PWM effect
- CSEE Journal of Power and Energy Systems Vol. 6, Issue 2, Pages: 307-317(2020)
- 作者机构：
  
  1. Yanshan University,Qinhuangdao,China
  2. Zhejiang University,Hangzhou,China
  3. Department of Electric Power Engineering, Norwegian University of Science and Technology, Trondheim,Norway
  4. Institute of Control and Industrial Electronics, Warsaw University of Technology, Warsaw,Poland
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2019.03020
  CLC：
- Published：2020
- 稿件说明：
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Guocheng San, Wenlin Zhang, Ran Luo, et al. Small-signal multi-frequency model for grid-connected inverter system with PWM effect[J]. CSEE Journal of Power and Energy Systems, 2020, 6(2): 307-317.
DOI：

Guocheng San, Wenlin Zhang, Ran Luo, et al. Small-signal multi-frequency model for grid-connected inverter system with PWM effect[J]. CSEE Journal of Power and Energy Systems, 2020, 6(2): 307-317. DOI： 10.17775/CSEEJPES.2019.03020.

摘要

Abstract

It is a well known fact that pulse width modulation (PWM) produces sideband effects. Taking this point into account

the accuracy of the grid-connected inverter model can be improved. In this paper

considering the aliasing effect of the PWM sideband components on the closed-loop control

a complete representation for the transfer function of the PWM is obtained. Furthermore

a multi-frequency model of grid-connected inverter system is derived. It is convenient for obtaining a PWM gain for grid-connected inverter system

which is PWM-controlled. In order to have an easy physical expression of the effects caused by the sideband components

an approximation is applied to simplify the PWM gain. The stability analysis is used to prove that PWM gain considering PWM effect is more precise than the conventional one. Experimental results verify the effectiveness of our proposal.

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