TY - JOUR
T1 - Control strategy to mitigate the impact of reduced inertia due to doubly fed induction generators on large power systems
AU - Gautam, Durga
AU - Goel, Lalit
AU - Ayyanar, Raja
AU - Vittal, Vijay
AU - Harbour, Terry
N1 - Funding Information:
Manuscript received February 03, 2010; revised April 29, 2010; accepted May 17, 2010. Date of publication July 12, 2010; date of current version January 21, 2011. This work was supported by the National Science Foundation under the Grants NSF ECCS-0652513 and EEC-9908690 at the Power System Engineering Research Center. Paper no. TPWRS-00083-2010. D. Gautam, R. Ayyanar, and V. Vittal are with the Department of Electrical Engineering, Arizona State University, Tempe, AZ 85287 USA (e-mail: durga. [email protected]; [email protected]; [email protected]). L. Goel is with ABB Inc., Raleigh, NC 27606 USA (e-mail: goel.lalit@gmail. com). T. Harbour is a Senior Utility Engineer employed in the utility industry. Digital Object Identifier 10.1109/TPWRS.2010.2051690
PY - 2011/2
Y1 - 2011/2
N2 - The present work is based on developing a control strategy to mitigate the impact of reduced inertia due to significant DFIG penetration in a large power system. The paper aims to design a supplementary control for the DFIG power converters such that the effective inertia contributed by these wind generators to the system is increased. The paper also proposes the idea of adjusting pitch compensation and maximum active power order to the converter in order to improve inertial response during the transient with response to drop in grid frequency. Results obtained on a large realistic power system indicate that the frequency nadir following a large power impact in the form of generators dropping out is effectively improved with the proposed control strategy. The proposed control is also validated against the sudden wind speed change in the form of wind gust downs and wind ramp downs occurring in conjunction with the generators dropping out. A beneficial impact in terms of damping power system oscillations is also observed, which is validated by eigenvalue analysis. The affected mode is then excited with a large disturbance in time domain. The damping improvement observed in time domain and subsequent Prony analysis support the result obtained from eigenvalue analysis.
AB - The present work is based on developing a control strategy to mitigate the impact of reduced inertia due to significant DFIG penetration in a large power system. The paper aims to design a supplementary control for the DFIG power converters such that the effective inertia contributed by these wind generators to the system is increased. The paper also proposes the idea of adjusting pitch compensation and maximum active power order to the converter in order to improve inertial response during the transient with response to drop in grid frequency. Results obtained on a large realistic power system indicate that the frequency nadir following a large power impact in the form of generators dropping out is effectively improved with the proposed control strategy. The proposed control is also validated against the sudden wind speed change in the form of wind gust downs and wind ramp downs occurring in conjunction with the generators dropping out. A beneficial impact in terms of damping power system oscillations is also observed, which is validated by eigenvalue analysis. The affected mode is then excited with a large disturbance in time domain. The damping improvement observed in time domain and subsequent Prony analysis support the result obtained from eigenvalue analysis.
KW - Doubly fed induction generator
KW - frequency response inertia
KW - transient stability
KW - wind turbine generators
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U2 - 10.1109/TPWRS.2010.2051690
DO - 10.1109/TPWRS.2010.2051690
M3 - Article
AN - SCOPUS:79151479221
SN - 0885-8950
VL - 26
SP - 214
EP - 224
JO - IEEE Transactions on Power Systems
JF - IEEE Transactions on Power Systems
IS - 1
M1 - 5508309
ER -