Research on Sub-synchronous Oscillation of DFIG-based Wind Farm Based on Impedance Analysis

LU Xiang; CHEN Liqun; LI Chengbo; LI Changwei; DUAN Ziyue; MENG Yongqing

doi:10.14044/j.1674-1757.pcrpc.2024.02.020

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Research on Sub-synchronous Oscillation of DFIG-based Wind Farm Based on Impedance Analysis

Application Technology in the Field of Clean Energy | 更新时间：2024-09-14

- Research on Sub-synchronous Oscillation of DFIG-based Wind Farm Based on Impedance Analysis
- Power Capacitor & Reactive Power Compensation Vol. 45, Issue 2, Pages: 141-150(2024)
- 作者机构：
  
  1.中国南方电网超高压输电公司，广州　 510663
  2.南京南瑞继保电气有限公司，南京　 210000
  3.西安交通大学电气工程学院，西安　 710049
- 作者简介：
- 基金信息：
- DOI：10.14044/j.1674-1757.pcrpc.2024.02.020
  CLC：
- Published：2024-04，
  
  Received：04 March 2023，
- 稿件说明：
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LU XIANG, CHEN LIQUN, LI CHENGBO, et al. Research on Sub-synchronous Oscillation of DFIG-based Wind Farm Based on Impedance Analysis. [J]. Power capacitor & reactive power compensation, 2024, 45(2): 141-150.
DOI：

LU XIANG, CHEN LIQUN, LI CHENGBO, et al. Research on Sub-synchronous Oscillation of DFIG-based Wind Farm Based on Impedance Analysis. [J]. Power capacitor & reactive power compensation, 2024, 45(2): 141-150. DOI： 10.14044/j.1674-1757.pcrpc.2024.02.020.

摘要

以新能源为主题的新型电力系统大力发展的背景下，风力发电得到了显著的发展。风力发电成为可再生能源的主要来源之一。串联补偿法将电容器组与输电线路串联，可以有效提高输电线路传输能力，是大型风力发电厂并网的优选途径。但是，串联补偿法的缺点是增加了系统次同步振荡的可能性。为了研究次同步振荡的抑制方法，本文基于阻抗分析，主要针对双馈风电场中由感应发电机效应引起的次同步振荡问题，采用基于阻抗分析的广义奈奎斯特分析法对风电场的次同步振荡现象进行推导分析，并提出一种在系统转子侧加入积分系数以增加系统阻尼的次同步振荡抑制策略。最终在Matlab/Simulink搭建风电场等值系统，通过仿真验证所建理论分析与抑制策略的准确性。

Abstract

Under the background of the vigorous development of the new power system with the theme of new energy

wind power has been significantly developed. Wind power has become one of the main sources of renewable energy. The series compensation method can effectively improve the transmission capacity of transmission lines by connecting capacitor bank with transmission lines

which is the preferred way for large wind power plants to connect to the grid. However

the disadvantage of the series compensation method is that it increases the possibility of sub synchronous oscillation of the system. For studying the suppression method of sub synchronous oscillation and as for the problem of sub synchronous oscillation caused by induction generator effect in doubly fed wind farm in this paper

the generalized Nyquist analysis method based on impedance analysis is used to deduce and analyze the sub-synchronous oscillation phenomenon of wind farm

and an integral coefficient is added to the rotor side of the system to increase the damping of the system. Finally

the wind farm equivalent system is set up in Matlab/Simulink

and the accuracy of the theoretical analysis and suppression strategy is verified by simulation.

关键词

双馈风机阻抗分析次同步振荡

Keywords

DFIGimpedance analysissub-synchronous oscillation

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