Large-Signal Stability Analysis of a Modular Multilevel Converter Based on Mixed Potential Theory

Hanhang Yin; Qianming Xu; Xiaoping Zhou; Xucheng Huang; Lei Wang; Zhikang Shuai; Josep M. Guerrero

doi:10.17775/CSEEJPES.2021.01150

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Large-Signal Stability Analysis of a Modular Multilevel Converter Based on Mixed Potential Theory

Regular Papers | 更新时间：2026-10-15

- Large-Signal Stability Analysis of a Modular Multilevel Converter Based on Mixed Potential Theory
- CSEE Journal of Power and Energy Systems Vol. 11, Issue 3, Pages: 1211-1225(2025)
- 作者机构：
  
  1. College of Electrical and Information Engineering, Hunan University,Changsha,China
  2. College of System Engineering, National University of Defense Technology,Changsha,China
  3. Department of Energy Technology, Aalborg University, Aalborg,Denmark
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2021.01150
  CLC：
- Published：01 May 2025
- 稿件说明：
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Hanhang Yin, Qianming Xu, Xiaoping Zhou, et al. Large-Signal Stability Analysis of a Modular Multilevel Converter Based on Mixed Potential Theory[J]. CSEE Journal of Power and Energy Systems, 2025, 11(3): 1211-1225.
DOI：

Hanhang Yin, Qianming Xu, Xiaoping Zhou, et al. Large-Signal Stability Analysis of a Modular Multilevel Converter Based on Mixed Potential Theory[J]. CSEE Journal of Power and Energy Systems, 2025, 11(3): 1211-1225. DOI： 10.17775/CSEEJPES.2021.01150.

摘要

Abstract

Modular multilevel converters (MMC) have been widely applied in high voltage direct current (HVDC) transmission systems

while complex dynamic characteristics pose challenges for stable operation under large-signal disturbance. In this paper

large-signal stability of MMC is investigated under grid voltage and power disturbances based on mixed potential function (MPF). First

an MMC simplified model based on average value model (AVM) is introduced. Then

the physical mechanism of large-signal instability phenomenon is revealed for MMC. Based on the simplified model

large-signal stability of MMC is analyzed by applying MPF. Furthermore

to diminish the conservatism of MPF

a large-signal stability criterion is defined by introducing a conservative correction factor. The influences of system parameters on large-signal stability of MMC are presented by the region of asymptotic stability (RAS). Finally

PLECS simulation case studies are carried out to verify the proposed stability criterion under grid voltage and power disturbances.

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