TY - GEN
T1 - Impact of DFIG based wind turbine generators on transient and small signal stability of power systems
AU - Gautam, Durga
AU - Vittal, Vijay
PY - 2009
Y1 - 2009
N2 - The improved efficiency and controllability inherent with the doubly fed induction generators (DFIGs) is bringing this technology to the forefront of power industry. However, the dynamic behavior of these machines is different from those of synchronous machines. Apparently, the large penetration of these machines entails a change in dynamics and operational characteristics of the system as a whole. Given this assertion, the present paper develops an approach to analyze the impact of increased penetration of DFIG based wind turbine generators on transient and small signal stability of a large power system. The primary basis of the method is to convert the DFIG machines into equivalent conventional round rotor synchronous machines and then evaluate the sensitivity of the eigenvalues with respect to inertia. In this regard, modes that are both detrimentally and beneficially affected by the change in inertia are identified. These modes are then excited by appropriate disturbances and the impact of reduced inertia on transient stability performance is also examined. The proposed technique is tested on a large test system representing the Midwestern portion of the U.S. interconnection. The results obtained indicate that the proposed method effectively identifies both detrimental and beneficial impacts of increased DFIG penetration both for transient stability and small signal stability related performance.
AB - The improved efficiency and controllability inherent with the doubly fed induction generators (DFIGs) is bringing this technology to the forefront of power industry. However, the dynamic behavior of these machines is different from those of synchronous machines. Apparently, the large penetration of these machines entails a change in dynamics and operational characteristics of the system as a whole. Given this assertion, the present paper develops an approach to analyze the impact of increased penetration of DFIG based wind turbine generators on transient and small signal stability of a large power system. The primary basis of the method is to convert the DFIG machines into equivalent conventional round rotor synchronous machines and then evaluate the sensitivity of the eigenvalues with respect to inertia. In this regard, modes that are both detrimentally and beneficially affected by the change in inertia are identified. These modes are then excited by appropriate disturbances and the impact of reduced inertia on transient stability performance is also examined. The proposed technique is tested on a large test system representing the Midwestern portion of the U.S. interconnection. The results obtained indicate that the proposed method effectively identifies both detrimental and beneficial impacts of increased DFIG penetration both for transient stability and small signal stability related performance.
KW - Doubly fed induction generator
KW - Inertia
KW - Sensitivity
KW - Small signal stability
KW - Transient stability
KW - Wind turbine generators
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U2 - 10.1109/PES.2009.5275847
DO - 10.1109/PES.2009.5275847
M3 - Conference contribution
AN - SCOPUS:77649313698
SN - 9781424442416
T3 - 2009 IEEE Power and Energy Society General Meeting, PES '09
BT - 2009 IEEE Power and Energy Society General Meeting, PES '09
T2 - 2009 IEEE Power and Energy Society General Meeting, PES '09
Y2 - 26 July 2009 through 30 July 2009
ER -