适应频率变化的双馈风电机组稳定分析改进模型

LI Hui

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适应频率变化的双馈风电机组稳定分析改进模型

更新时间：2025-08-13

- 适应频率变化的双馈风电机组稳定分析改进模型
- Automation of Electric Power Systems Vol. 38, Issue 21, Pages: 19-25(2014)
- 作者机构：
  
  输配电装备及系统安全与新技术国家重点实验室，重庆大学,重庆市,400044
- 作者简介：
- 基金信息：
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- Published：2014
- 稿件说明：
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LI Hui. [J]. Automation of electric power systems, 2014, 38(21): 19-25.
DOI：

LI Hui. [J]. Automation of electric power systems, 2014, 38(21): 19-25. DOI：

摘要

为分析变速恒频风电机组在不同电网频率下的稳定性，提出了考虑适应电网频率变化的双馈风电机组小干扰稳定性的电磁暂态模型。首先，分析了双馈感应发电机现有常规电磁暂态模型不含电网频率导数项，不能反映电网频率变化的问题，提出了双馈感应发电机改进转子暂态电动势的表达式，并建立了含变流器控制系统在内的双馈风电机组小信号改进模型。其次，采用特征值方法，对不同电网频率运行下采用改进及常规双馈感应发电机电磁暂态模型时的系统特征值进行计算与稳定性分析。最后，建立考虑电网频率变化的双馈风电系统时域仿真模型，分别对不同电网频率及不同负荷扰动下的风电机组有功功率和转速特性进行仿真。理论分析及仿真结果表明，相对常规电磁暂态模型，所提出的双馈风电机组改进模型对电网频率变化更为敏感，可适应频率变化的双馈风电机组小干扰稳定分析。

Abstract

In order to analyze the stability of variable speed wind turbine generator system under different grid frequencies，an electromagnetic transient model of small signal stability analysis for a doubly-fed wind turbine is proposed.The model considers the grid frequency variations.Firstly，literature review shows that the conventional electromagnetic transient model of doubly-fed induction generator（DFIG）cannot reflect grid frequency disturbances due to lack of grid frequency reciprocal items.As such，an improved expression of rotor transient electromotive force is proposed and the small signal improved model of DFIG with its converter control system is established considering the grid frequency disturbance impacts.Then，eigenvalues are calculated and compared by using the improved and traditional electromagnetic transient model under different grid frequencies.Finally，the time-domain simulation model considering grid frequency disturbances is established，and then the active power and the rotor speed performances are simulated under different grid frequencies and different load disturbances.Analytical and simulation results show that compared with the traditional DFIG electromagnetic transient model，the improved model is more sensitive to the grid frequency change，and can be adapted to analyze the stability of doubly-fed wind turbines considering the grid frequency variations.

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