A Novel Equivalent Capacitance Model of DFIG to Study its Reactive Power Control Capabilities and its ability to Stabilize SEIG

kalyan raj kaiganti, Rayapudi Srinivasa Rao


The penetration of wind generation in modern day energy system is increasing day by day. Wind is a variable parameter in nature which has a significant effect on the generator behavior. Since most of the existing installed generators are self-excited induction generators (SEIG), they have a negative effect on the system during varying wind speeds and varying load. The primary parameter found responsible is reactive power requirement for self-excitation. So, instead of replacing these generator sets, an alternative reactive power source connected in coordination to machine can well handle these situations. In this context a new promising method of stabilizing SEIG with doubly fed generator (DFIG) is developed in this paper. A new technique of representing DFIG in terms of its equivalent capacitance is developed, to study reactive its power handling capabilities. The potential of the developed model in stabilizing the SEIG during varying wind speeds and varying load conditions is simulated and analyzed. The developed model is independent of complex d-q axis model and simple to understand the behavior of machine. The result shows that this method of supplying reactive power requirement of SEIG is satisfactory in maintaining voltage build up of SEIG. The results obtained are well validated by power balance.

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Self excited induction generator, Doubly-fed induction generator, Capacitance, Stabilization, Reactive power requirement, Wind turbine generating units (WTGU), Varying wind speed, Varying load.

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R. C. Bansal, “Three Phase Induction generators: An Overview,” IEEE Trans. Energy Convers., vol. 20, no. 2, pp. 292-299, June 2005.

N. H. Malik and S. E. Hague, “Steady state analysis and Performance of an isolated Self-Excited Induction Generator,” IEEE Trans. on energy conversion, vol.1, no.3, pp. 134-137, Sep. 1986.

Mustafa A. Al-Saffar, Eui-Cheol Nho, Thomas A. Lipo, “Controlled shunt capacitor self-excited induction generator,” IEEE Conference on Industrial App., vol. 2, pp.1486-1490, October 1998.

Mohd. Hasan Ali, and Bin Wu, “Comparison of Stabilization Methods for Fixed-Speed Wind Generator Systems,” IEEE Trans. on Power Delivery, vol. 25, no. 1, January 2010.

Pena, J. C. Clare, G. M. Asher, “Doubly fed induction generator using back-to-back PWM converters and its application to variable-speed wind-energy generation,” IEE Proc. Electr. Power Appl., vol. 143, no. 3, pp. 231-241, May 1996.

L. M. Fernandez, C. A Garcia, and F. Jurado, “Comparative study on the performance of control systems for doubly fed induction generator (DFIG) wind turbines operating with power regulation,” Energy Journal, vol. 33, pp. 1438-1452, 2008.

L. Meeghapola, B. Fox, T Littler, and D. Flynn, “Multi objective reactive power flow from wind farms for network performance enhancement,” Int. Trans. Electr. Energ. Syst. on Energy Conversion., Vol. 23, pp. 135-150, 2013

Kayikci .M, Milanovic J.V, “Reactive power control strategies for DFIG based plants,” IEEE Trans. Energy Convers., vol. 22, no. 2, pp. 389–396,2007.

J. B. Ekanayake, L. Holdsworth, Xue Guang Wu, N. Jenkins, “Dynamic modeling of doubly fed induction generator wind turbines,” IEEE Trans.Power Syst, vol.18, no.2, pp. 803–809,2003.

R. Takahashi, J. Tamura, M. Futami, M. Kimura and K. lde, “A New Control Method for Wind Energy Conversion System Using Double Fed Synchronous Generator,” IEEJ Power and Energy, vol. 126, no. 2, pp. 225-235, 2006.

Tapia, “Modeling and control of a wind turbine driven doubly fed induction generator," IEEE Transactions on Energy Conversion, vol. 18, pp. 194-204, 2003.

S. M. Muyeen, M. Hasan Ali, R. Takahashi, T. Murata, J. Tamura, Y. Tomaki, A. Sakahara, and E. Sasano, “Comparative study on transient stability analysis of wind turbine generator system using different drive train models,” IET Renew. Power Gener., vol. 1, no. 2, pp. 131–141, Jun. 2007.

A. Kheldoun, L. Refoufi, D. Eddine, “Analysis of the self-excited induction generator steady state performance using a new efficient algorithm,” Journal of Electr. Power Syst., vol. 86, pp. 61–67, May 2012.

K. C. Divya, P. S. N. Rao, ”Models for wind turbine generating systems and their application in load flow studies,” Electric Power Syst. Research, vol. 76, pp. 844–856, 2006.

Feijóo and J. Cidrás, “Calculating Steady-State Operating Conditions for Doubly-Fed Induction Generator Wind Turbines,” IEEE Trans. Power Syst., vol. 25, no. 2, pp. 922–928, Feb.2010.

J. F. M. Padron, A. E. F. Lorenzo, “calculating the steady-state operating conditions for Doubly-fed induction generator wind turbines”, IEEE Trans. on Power Systems ,Vol. 25, pp. 922-928,2010.

A. Dadhani, B. Venkatesh, A. B. Nassif and V. K. Sood, “Modelling of Doubly fed Induction Generators for Distribution system Power flow analysis”,Electric Power and Energy Systems, Vol. 53, pp. 576-583,2013.

Simoes, M. Godoy, Farret, Felix A., “Alternative Energy Systems: Design and Analysis with Induction Generators,” Second Edition, CRC Press, Boca Raton, 2007, Chapter 5, pp.93-99.


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