Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy

Jing Ma; Ningsai Su; Yaqi Shen

doi:10.17775/CSEEJPES.2022.07150

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Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy

Regular Papers | 更新时间：2026-10-10

- Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy
- Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy
- 中国电机工程学会电力与能源系统学报(英文) 2026年12卷第5期页码：2352-2366
- 作者机构：
  
  State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University,Beijing,China
- 作者简介：
- 基金信息：
- DOI：10.17775/CSEEJPES.2022.07150
  中图分类号：
- 纸质出版：2026-09-01
- 稿件说明：
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Jing Ma, Ningsai Su, Yaqi Shen. Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy[J]. 中国电机工程学会电力与能源系统学报(英文), 2026,12(5):2352-2366.

Jing Ma, Ningsai Su, Yaqi Shen. Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy[J]. CSEE Journal of Power and Energy Systems, 2026, 12(5): 2352-2366.
Jing Ma, Ningsai Su, Yaqi Shen. Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy[J]. 中国电机工程学会电力与能源系统学报(英文), 2026,12(5):2352-2366. DOI： 10.17775/CSEEJPES.2022.07150.

Jing Ma, Ningsai Su, Yaqi Shen. Stability Analysis for Direct-drive Wind Farm Transmitted via Flexible DC System Based on Dynamic Energy[J]. CSEE Journal of Power and Energy Systems, 2026, 12(5): 2352-2366. DOI： 10.17775/CSEEJPES.2022.07150.

摘要

Abstract

When direct-drive wind farms are transmitted via flexible DC systems

the interaction between different wind farms

flexible DC converters and multiple equipment often results in sub-synchronous oscillations. Concerning this problem

this paper considers the interaction between the direct-drive wind farm and flexible DC converter station and builds the dynamic energy model of the interconnected system. According to the source of energy

the dynamic energy in the system is decomposed into four parts: the PMSG (permanent magnet synchronous generator) induction energy

the inter-generator interaction energy

the flexible DC induction energy and the generator-grid interaction energy. These four components characterize the respective contributions of the wind farm's inherent damping

the flexible DC system's inherent damping

inter-generator interaction

and generator-grid interaction to the system's overall stability. Then

based on the dynamic energy model of the system

the effects of PMSG integration distance

PMSG operation status

and flexible DC operation status on the stability level of the system are analyzed quantitatively. Finally

a model of a direct-drive wind farm transmitted via a flexible DC system is built in MATLAB/SIMULINK for simulation tests. The results verify that the interaction energy between the flexible DC converter station and PMSG and the interaction energy between the PMSGs with forced oscillation are the key factors that induce the oscillation.

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