Design and optimization of DFIGs with alternate voltage and speed ratings for wind applications

Author

Dehnavifard, H. ; Lilla, A.D. ; Khan, Muhammad Asad ; Barendse, Paul

Author_Institution

Dept. of Electr. Eng., Univ. of Cape Town, Cape Town, South Africa

fYear

2014

fDate

2-5 Sept. 2014

Firstpage

2008

Lastpage

2013

Abstract

Induction machines 100 kW to 7.5 MW are designed for Low Voltage (LV) 460 V, 690 V or Medium Voltages (MV) 2.4 kV to 4 kV and 12 kV in special cases. The objective of this paper is to compare doubly fed induction generators (DFIGs) with different voltage and speed ratings for wind energy systems. This paper investigates the effect of alternate number of poles and voltage ratings on the performance of a DFIG. The design of a DFIG has been optimized by means of an analytical model and a Genetic Algorithm (GA). Several optimized DFIG designs were generated in this manner, and then matched with a suitable single-stage gear box and a back-to-back converter connected to the rotor. This paper suggests an improved system by considering the quality of output power, voltage and number of poles.

Keywords

asynchronous generators; genetic algorithms; power convertors; wind power plants; DFIG design; DFIG optimization; alternate speed ratings; alternate voltage ratings; back-to-back converter; doubly fed induction generators; genetic algorithm; induction machines; power 100 kW to 7.5 MW; single-stage gear box; voltage 12 kV; voltage 2.4 kV to 4 kV; voltage 460 V; voltage 690 V; wind applications; wind energy systems; Gears; Generators; Optimization; Rotors; Stator windings; Torque; DFIG; Design; genetic algorithm; induction generator; optimization; single-stage gearbox; wound rotor;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines (ICEM), 2014 International Conference on

Conference_Location

Berlin

Type

conf

DOI

10.1109/ICELMACH.2014.6960460

Filename

6960460