Matching a Wind T
Matching a Wind Turbine with a Self-Excited Induction Generator
Adel S. Nada and Saeed A. Al-Ghamdi
Electric Eng. Dept., Faculty of Engineering, Al-Baha University, Al-Baha, KSA
ABSTRACT: This paper investigates an analytical approach for matching the characteristics of a fixed pitch angle wind turbine with that of a self-excited induction generator (SEIG). The generator feeds its stator electrical output power into an infinite bus-bar via a static power conditioner. The power conditioner used here consists of a diode bridge rectifier and an inverter bridge thyristor tied together through a d.c. link reactor of high inductance in the stator circuit. The analysis is carried out by representing the steady state performance of the self-excited induction generator mathematical model. The wind turbine’s performance curve, power coefficient versus tip speed ratio, Cp(l), is represented by a polynomial function of both the generator speed and the wind speed. At any given generator speed the wind turbine output mechanical power is equated to the SEIG input mechanical power. From this mechanical power balance a non-linear equation for the wind speed is resulted. This equation is solved numerically using Newton-Raphson method. Knowing the wind speed the corresponding other performance characteristics can easily be obtained.
[Adel S. Nada and Saeed A. Al-Ghamdi. Matching a Wind Turbine with a Self-Excited Induction Generator. J Am Sci 2013;9(6):607-614]. (ISSN: 1545-1003). http://www.jofamericanscience.org. 77
Key Words: Wind turbine, Induction generator, Static power conditioner, Infinite bus-bar. Full Text 77