Mechanism Analysis of Additional Damping Control Strategies for the High-frequency Resonance of MMC Connected to AC Grid

Yanqi Hou; Chongru Liu; Yu Wang; Wei Kong

doi:10.17775/CSEEJPES.2020.06340

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Mechanism Analysis of Additional Damping Control Strategies for the High-frequency Resonance of MMC Connected to AC Grid

Regular Papers | 更新时间：2026-10-15

- Mechanism Analysis of Additional Damping Control Strategies for the High-frequency Resonance of MMC Connected to AC Grid
- CSEE Journal of Power and Energy Systems Vol. 9, Issue 3, Pages: 1173-1181(2023)
- 作者机构：
  
  1. State Key Laboratory for Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University,Beijing,China
  2. State Grid Economic and Technological Research Institute Co. Ltd.,Beijing,China
  3. State Grid Corporation of China,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2020.06340
  CLC：
- Published：01 May 2023
- 稿件说明：
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Yanqi Hou, Chongru Liu, Yu Wang, et al. Mechanism Analysis of Additional Damping Control Strategies for the High-frequency Resonance of MMC Connected to AC Grid[J]. CSEE Journal of Power and Energy Systems, 2023, 9(3): 1173-1181.
DOI：

Yanqi Hou, Chongru Liu, Yu Wang, et al. Mechanism Analysis of Additional Damping Control Strategies for the High-frequency Resonance of MMC Connected to AC Grid[J]. CSEE Journal of Power and Energy Systems, 2023, 9(3): 1173-1181. DOI： 10.17775/CSEEJPES.2020.06340.

摘要

Abstract

High-frequency resonance can occur when a modular multilevel converter (MMC) is inserted into an AC grid. Additional damping control is a relatively low-cost resonance suppression strategy compared to passive damping strategies. This paper analyzes the influences of a feed-forward voltage filter and feedback current filter for the inner controller for the high-frequency impedance characteristics of the MMC based on a model. Moreover

the mechanism

influencing factors

and limitations of the existing strategy including an additional low-pass filter in the voltage feed-forward stage are investigated. Secondly

a resonance suppression strategy for the inclusion of additional cascaded notch filters in the voltage feed-forward stage is proposed

and its parameter design method and applicable scenarios are analyzed. In addition

this paper analyzes the effects of the inclusion of an additional control in other stages for the inner controller of the MMC. Finally

the correctness of the theoretical analysis and the proposed strategy is verified based on the simulation of an actual project on PSCAD/EMTDC.

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