Impedance characteristics of DFIGs considering the impacts of DFIG numbers and its application on SSR analysis

2017 2nd Asia Conference on Power and Electrical Engineering

能源学;电工学

You, J.J.^1 ; Ning, W.Y.^2 ; Jiang, H.^2 ; Dong, Y.X.^1 ; Liu, H.^2 ; Li, Y.^2

North China Electric Power University, Changping District, Beijing

102206, China^1

State Grid Jibei Electric Power Research Institute, Xicheng District, Beijing

100045, China^2

关键词: Doubly fed induction generators;    Impedance characteristics;    ITS applications;    Power System;    Series compensated lines;    Subsynchronous resonance;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/199/1/012029/pdf
DOI  :  10.1088/1757-899X/199/1/012029

来源: IOP

【 摘 要 】

Sub-synchronous resonance (SSR) occurred in the power system with both Doubly Fed Induction Generators (DFIGs) and series-compensated lines. There have been several papers focusing on the analysis of such SSR phenomenon. To the authors' knowledge, the impacts of DFIG numbers are seldom considered in existing papers. In this paper, the impedance characteristics of DFIGs under different numbers are analyzed. Then the relationship between DFIG numbers and SSR characteristics is discussed. The contributions to be included in the paper are as following: 1) the impedance of N DFIGs is roughly equal to 1/N of the impedance of one DFIG. 2) The SSR risk of system is related with both the numbers of DFIGs and the parameters of the series-compensated lines.