Impedance and Sub-synchronous Oscillation Characteristics of Doubly-fed Induction Generators with Control Strategy of Voltage Virtual Synchronous Generator

Lixia FAN; Ruiqiang CAI; Huanchang ZHANG; Yuan WEI; Tian TIAN; Bin HU

doi:10.12096/j.2096-4528.pgt.19055

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Impedance and Sub-synchronous Oscillation Characteristics of Doubly-fed Induction Generators with Control Strategy of Voltage Virtual Synchronous Generator

New and Renewable Energy | 更新时间：2025-06-06

- Impedance and Sub-synchronous Oscillation Characteristics of Doubly-fed Induction Generators with Control Strategy of Voltage Virtual Synchronous Generator
- Power Generation Technology Vol. 40, Issue 5, Pages: 434-439(2019)
- 作者机构：
  
  1.西北电力设计院有限公司, 陕西省西安市 710075
  2.华北电力大学电气与电子工程学院, 北京市昌平区 102206
- 作者简介：
- 基金信息：
  
  National Key Research and Development Program of China(2018YFB0904000)
- DOI：10.12096/j.2096-4528.pgt.19055
  CLC：
- Received：17 April 2019，
  
  Published：30 October 2019
- 稿件说明：
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Lixia FAN, Ruiqiang CAI, Huanchang ZHANG, et al. Impedance and Sub-synchronous Oscillation Characteristics of Doubly-fed Induction Generators with Control Strategy of Voltage Virtual Synchronous Generator[J]. Power Generation Technology, 2019, 40(5): 434-439.
DOI：

Lixia FAN, Ruiqiang CAI, Huanchang ZHANG, et al. Impedance and Sub-synchronous Oscillation Characteristics of Doubly-fed Induction Generators with Control Strategy of Voltage Virtual Synchronous Generator[J]. Power Generation Technology, 2019, 40(5): 434-439. DOI： 10.12096/j.2096-4528.pgt.19055.

摘要

针对双馈风电机组（doubly-fed induction generators，DFIG）经串补送出系统存在次同步振荡（sub-synchronous oscillation，SSO）的问题，以电压型虚拟同步发电机（virtual synchronous generator，VSG）控制策略下的DFIG为研究对象，首先基于三相静止坐标系建立了其阻抗模型，推导了机组正、负序阻抗解析式；其次搭建了PSCAD/EMTDC模型，对理论推导阻抗特性和频率扫描结果进行了对比验证；最后基于奈奎斯特稳定判据定量分析了VSG控制策略下的DFIG经串补送出系统SSO特性，通过仿真验证了所建立模型和稳定性分析结论的正确性。研究结果为SSO的抑制提供了参考。

Abstract

Aiming at the problem that sub-synchronous oscillation (SSO) is observed in doubly-fed induction generators (DFIG) connected to series-compensated transmission system

the DFIG with control strategy of voltage virtual synchronous generator (VSG) was taken as research object. Firstly

its impedance model based on three-phase stationary coordinate system was built

and the positive and negative sequence impedance analytical formulas of DFIG were deduced. Then

the impedance model of the DFIG was built on PSCAD/EMTDC platform

and the results of theoretical derivation and frequency scanning were verified by comparison. Finally

the SSO characteristics of DFIG connected to series-compensated transmission system with control strategy of VSG was analyzed quantitatively based on Nyquist stability criterion. The correctness of the established model and stability analysis conclusion was verified by simulation. The study results provide reference for suppression of SSO.

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