Frequency Coupling Oscillation Detection and Adaptive Mitigation for MMC-based Grid-connected System

Mingkun Gao; Hailiang Xu; Pingjuan Ge; Chunzhen Liu; Jiabing Hu

doi:10.17775/CSEEJPES.2023.01000

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Frequency Coupling Oscillation Detection and Adaptive Mitigation for MMC-based Grid-connected System

Regular Papers | 更新时间：2026-10-10

- Frequency Coupling Oscillation Detection and Adaptive Mitigation for MMC-based Grid-connected System
- CSEE Journal of Power and Energy Systems Vol. 12, Issue 5, Pages: 2453-2466(2026)
- 作者机构：
  
  1. College of New Energy, China University of Petroleum (East China),Qingdao,China
  2. School of Electrical and Electronic Engineering, Huazhong University of Science and Technology,Wuhan,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2023.01000
  CLC：
- Published：01 September 2026
- 稿件说明：
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Mingkun Gao, Hailiang Xu, Pingjuan Ge, et al. Frequency Coupling Oscillation Detection and Adaptive Mitigation for MMC-based Grid-connected System[J]. CSEE Journal of Power and Energy Systems, 2026, 12(5): 2453-2466.
DOI：

Mingkun Gao, Hailiang Xu, Pingjuan Ge, et al. Frequency Coupling Oscillation Detection and Adaptive Mitigation for MMC-based Grid-connected System[J]. CSEE Journal of Power and Energy Systems, 2026, 12(5): 2453-2466. DOI： 10.17775/CSEEJPES.2023.01000.

摘要

Abstract

The modular multilevel converter (MMC)-based high voltage direct current (HVDC) becomes a preferred solution for large-scale long-distance transmission of renewable energy. However

the interaction between the MMC and grid may induce frequency coupling oscillation

in which a pair of sub- and super-synchronous oscillation components will appear. Particularly

it is difficult to detect and mitigate the frequency coupling oscillation due to the strong coupling characteristics between the sub- and super-synchronous components. To deal with such an issue

this paper proposes a fast detection method for the frequency coupling oscillation

which can eliminate the influence of the DC component effectively. In addition

a parameter-tuning approach for the oscillation detection is provided to achieve a balance between the accuracy and dynamic performance. Thereupon

an adaptive frequency coupling oscillation mitigation strategy is proposed

which can improve the system damping characteristic and enhance the stability margin. Finally

time-domain simulations are performed to verify the effectiveness of the proposed method.

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