Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control

Baoxian Li; Jinwei He

doi:10.17775/CSEEJPES.2022.03280

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Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control

Regular Papers | 更新时间：2026-06-12

- Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control
- Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control
- 中国电机工程学会电力与能源系统学报(英文) 2026年12卷第3期页码：1515-1524
- 作者机构：
  
  School of Electrical and Information Engineering, Tianjin University,Tianjin,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2022.03280
  中图分类号：
- 纸质出版：2026
- 稿件说明：
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Baoxian Li, Jinwei He. Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control[J]. 中国电机工程学会电力与能源系统学报(英文), 2026,12(3):1515-1524.

Baoxian Li, Jinwei He. Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control[J]. CSEE Journal of Power and Energy Systems, 2026, 12(3): 1515-1524.
Baoxian Li, Jinwei He. Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control[J]. 中国电机工程学会电力与能源系统学报(英文), 2026,12(3):1515-1524. DOI： 10.17775/CSEEJPES.2022.03280.

Baoxian Li, Jinwei He. Series-Connected Mixed-Switching-Frequency Power Cells Featuring an Islanded Microgrid with Enhanced Power Quality Control[J]. CSEE Journal of Power and Energy Systems, 2026, 12(3): 1515-1524. DOI： 10.17775/CSEEJPES.2022.03280.

摘要

Abstract

In this paper

an islanded microgrid is developed using series-connected mixed switching frequency power cells. The system consists of a few low switching frequency (LSF) power cells in a simple fixed modulation index operation manner to reduce the switching loss and the computational load of the control system. The reference voltages of LSF power cells are obtained from a frequency inverse power factor droop controller to get proper power sharing between power cells without any communications. Meanwhile

a high switching frequency (HSF) power cell with a floating DC bus can effectively absorb the harmonics from these LSF power cells. The HSF power cell also behaves as an inherent harmonic virtual impedance to mitigate the islanded microgrid's resonance and provide an accurate point of common coupling (PCC) voltage magnitude restoration. With the help of this HSF power cell

various types of power quality issues of the cascaded power cells based on the islanded microgrid can be solved without any interference with the power-sharing among LSF power cells.

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