Transient Voltage Stability Evaluation Method for Wind Power Grid-connected Systems Based on Improved Thevenin Equivalent

ZHAO Linsheng; YAO Jun; WANG Kai; JIN Rongyu; YANG Yuheng; WANG Zhihui; {{custom_author.name_en}}

doi:10.13334/j.0258-8013.pcsee.242710

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Transient Voltage Stability Evaluation Method for Wind Power Grid-connected Systems Based on Improved Thevenin Equivalent

更新时间：2026-10-19

- Transient Voltage Stability Evaluation Method for Wind Power Grid-connected Systems Based on Improved Thevenin Equivalent
- Vol. 46, Issue 7, Pages: 2809-2823(2026)
- 作者机构：
  
  输变电装备技术全国重点实验室(重庆大学)，重庆市沙坪坝区,400044
- 作者简介：
- 基金信息：
- DOI：10.13334/j.0258-8013.pcsee.242710
  CLC：
- Received：05 April 2026，
  
  Published：2026
- 稿件说明：
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ZHAO Linsheng, YAO Jun, WANG Kai, et al. Transient Voltage Stability Evaluation Method for Wind Power Grid-connected Systems Based on Improved Thevenin Equivalent[J]. 2026, 46(7): 2809-2823.
DOI：

ZHAO Linsheng, YAO Jun, WANG Kai, et al. Transient Voltage Stability Evaluation Method for Wind Power Grid-connected Systems Based on Improved Thevenin Equivalent[J]. 2026, 46(7): 2809-2823. DOI： 10.13334/j.0258-8013.pcsee.242710.

摘要

随着可再生能源的持续开发与利用，风力发电在电力系统中所占比例快速增长。由于风电机组的暂态电压响应特性与传统同步电源存在显著差异，电力系统的电压稳定机制发生了深刻变化，使得传统的分析方法难以准确快速评估系统暂态电压水平。以含大规模风电接入系统为研究对象，综合考虑多异构电源及负荷的暂态电压响应特性，研究电网短路故障下风电并网系统的电压稳定性评估方法。首先，从时域断面参数精确辨识的角度，提出适用于风电机组暂态电压稳定分析的改进戴维南等值方法；然后，分别考虑多异构电源及负荷的暂态电压响应特性，建立风电并网系统等值模型；在此基础上，结合系统的功率传输能力与功角稳定约束，提出系统稳定运行边界及电压稳定量化评估方法；最后，通过多工况仿真算例验证所提评估方法的正确性和鲁棒性。

Abstract

With the development and utilization of renewable energy

the proportion of wind power in power system is growing rapidly. Due to the significant difference of transient voltage characteristics between wind turbines and synchronous generators

the voltage stabilization mechanisms have undergone profound changes

making it difficult for traditional analysis methods to evaluate the transient voltage level of the system accurately and quickly. In this paper

considering the transient voltage response characteristics of multi-heterogeneous power sources and loads

the voltage stability evaluation method of grid-connected wind power system under grid short-circuit fault is studied. First

from the perspective of fine identification of time-domain cross-section parameters

this paper proposes an improved Thevenin equivalent method to analyze transient voltage stability of wind turbines. Then

considering the transient voltage response characteristics of diverse power sources and loads

the equivalent model is established. On this basis

combined with the constraints of power transfer capability and power angle stability of the system

a quantitative evaluation method of system stability operation boundary and voltage stability is proposed. Finally

the effectiveness and robustness of the proposed stability margin index are validated through multiple simulation cases.

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