|Table of Contents|

 Impact of DFIG-based wind farms interconnected to power
grid on subsynchronous oscillation of turbogenerator
(PDF)

[ISSN:1007-449X/CN:23-1 408/TM]

Issue:
2015年06
Page:
47-54
Research Field:
Publishing date:

Info

Title:
 Impact of DFIG-based wind farms interconnected to power
grid on subsynchronous oscillation of turbogenerator
Author(s):
 LI HuilCHEN Yao-junLI YangLIU Sheng-quanYANG Dong
LIANG Yuan-vuan
LAN Yong-sen
 1. College of Electrical Engineering, Chongqing University, Chongqing 400044,China; 2. Chongqing KK-QIANWEIWind
Power Equipment Co.,Ltd, Chongqing 401121,China; 3. CSIC( Chongqing) Haizhuang Wind Power Equipment Co.,Ltd ,
Chongqing 401122,China; 4. Jinxing Power Supply Company of Zhejiang Power Grid Corporation, Jinxing 314000,China
Keywords:
 Keywords:doubly fed induction generator(DFIG)based wind farmsturbogenerator subsynchronous
oscillation mode
modal analysisdamping ratio sensitivity
PACS:
TM 614
DOI:
10. 15938/j. emc.2015.06.008
Abstract:
 Abstract:Considering the shaft torsional vibration risk of the turbogenerator caused by the integration of
large capacity wind farms in wind&thermal power transmission system,the impact of doubly fed induc-
tion generator(DFIG)-based wind farms interconnected to power grid on subsynchronous oscillation of
turbogenerator was investigated. Firstly,the detailed mathematical models for the small signal stability a-
nalysis with DFIG-based wind farms were established. By utilizing modal analysis method,the changes of
the system subsynchronous oscillation modes with and without DFIG-based wind farms were investigated,
respectively,and the presented models and modal analysis were demonstrated by comparison with the
time-domain simulation results. Then,based on the concept of parameter sensitivity,the analytical sensi-
tivity expression of subsynchronous oscillation damping ratio on wind farm parameters was deduced. Fi-
nally,Regarding for the different conditions of wind speed and reactive power of the wind farms,the vari-
anon of subsynchronous oscillation mode was discussed. The results show that the connected DFIG-based
wind farm could reduce the subsynchronous oscillation damping in keeping the external condition. Fur-
thermore,the parameters of active power and reactive power of the wind farms have an obvious effect on
the system subsynchronous oscillation damping.

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Last Update: 2015-07-24