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Steady-state analysis of an isolated self-excited induction generator driven by regulated and unregulated turbine

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1 Author(s)
S. M. Alghuwainem ; Dept. of Electr. Eng., King Saud Univ., Riyadh, Saudi Arabia

This paper examines the steady-state analysis and performance of an isolated three-phase self-excited induction generator (SEIG) driven by regulated and unregulated turbines. For the case of a regulated turbine, the equivalent circuit is solved with speed as a constant parameter, while for the unregulated turbine, the speed is considered as a variable which depends on the shaft torque according to the turbine characteristics. The no-load speed is considered as a constant independent parameter, which depends on wind speed which is assumed constant in this analysis. The steady-state equivalent circuit is solved using the node-admittance method, and the shaft torque is expressed in terms of the rotor current. The Newton-Raphson method is used to solve the system nonlinear equations. For the present investigation, a linear speed-torque characteristic is considered, but the method of analysis applies equally well to nonlinear characteristics. Experimental investigations on a 1 kW three-phase induction generator driven by a separately excited DC shunt motor have confirmed the accuracy of the proposed method of analysis

Published in:

IEEE Transactions on Energy Conversion  (Volume:14 ,  Issue: 3 )