Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault

Botong Li; Dingchuan Zheng; Bin Li; Xinru Jiao; Qiteng Hong; Liang Ji

doi:10.1186/s41601-023-00310-0

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Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault

Original Research | 更新时间：2026-09-30

- Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault
- Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault
- 现代电力系统保护与控制（英文） 2023年8卷第2期页码：1-15
- 作者机构：
  
  1. Key Laboratory of Smart Grid of Ministry of Education, Tianjin University,Tianjin,China
  2. National Industry-Education Platform of Energy Storage, Tianjin University,Tianjin,China
  3. Department of Electronic and Electrical Engineering, University of Strathclyde, Glasaow,UK
  4. Department of Electrical Power Engineering, Shanghai University of Electric Power,Shanghai,China
- 作者简介：
- 基金信息：
- DOI：10.1186/s41601-023-00310-0
  中图分类号：
- 纸质出版：2023-04-01
- 稿件说明：
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Botong Li, Dingchuan Zheng, Bin Li, 等. Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault[J]. 现代电力系统保护与控制（英文）, 2023,8(2):1-15.

Botong Li, Dingchuan Zheng, Bin Li, et al. Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault[J]. Protection and Control of Modern Power Systems, 2023, 8(2): 1-15.
Botong Li, Dingchuan Zheng, Bin Li, 等. Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault[J]. 现代电力系统保护与控制（英文）, 2023,8(2):1-15. DOI： 10.1186/s41601-023-00310-0.

Botong Li, Dingchuan Zheng, Bin Li, et al. Analysis of low voltage ride-through capability and optimal control strategy of doubly-fed wind farms under symmetrical fault[J]. Protection and Control of Modern Power Systems, 2023, 8(2): 1-15. DOI： 10.1186/s41601-023-00310-0.

摘要

Given the “carbon neutralization and carbon peak” policy

enhancing the low voltage ride-through (LVRT) capability of wind farms has become a current demand to ensure the safe and stable operation of power systems in the context of a possible severe threat of large-scale disconnection caused by wind farms. Currently

research on the LVRT of wind farms mainly focuses on suppressing rotor current and providing reactive current support

while the impact of active current output on LVRT performance has not been thoroughly discussed. This paper studies and reveals the relationship between the limit of reactive current output and the depth of voltage drop during LVRT for doubly-fed induction generator (DFIG) based wind farms. Specifically

the reactive current output limit of the grid-side converter is independent of the depth of voltage drop

and its limit is the maximum current allowed by the converter

while the reactive current output limit of the DFIG stator is a linear function of the depth of voltage drop. An optimized scheme for allocating reactive current among the STATCOM

DFIG stator

and grid-side converter is proposed. The scheme maximizes the output of active current while satisfying the standard requirements for reactive current output. Compared to traditional schemes

the proposed LVRT optimization strategy can output more active power during the LVRT period

effectively suppressing the rate of rotor speed increase

and improving the LVRT performance and fault recovery capability of wind farms. Simulation results verify the effectiveness of the proposed scheme.

Abstract

Given the “carbon neutralization and carbon peak” policy

research on the LVRT of wind farms mainly focuses on suppressing rotor current and providing reactive current support

the reactive current output limit of the grid-side converter is independent of the depth of voltage drop

and its limit is the maximum current allowed by the converter

while the reactive current output limit of the DFIG stator is a linear function of the depth of voltage drop. An optimized scheme for allocating reactive current among the STATCOM

DFIG stator

and grid-side converter is proposed. The scheme maximizes the output of active current while satisfying the standard requirements for reactive current output. Compared to traditional schemes

the proposed LVRT optimization strategy can output more active power during the LVRT period

efectively suppressing the rate of rotor speed increase

and improving the LVRT performance and fault recovery capability of wind farms. Simulation results verify the efectiveness of the proposed scheme.

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