Abstract
In this paper a simplified mathematical model of a
single machine brushless double fed induction generator
(SM-BDFIG) connected to a variable speed wind turbine is
presented. The SM-BDFIG consists of a slip ring induction
machine, which is the main generator, a converter, and a
battery pack mounted on the same shaft. In the supersynchronous
speed range of operation, which is investigated
in this research paper, the rotor voltage is rectified and used
to charge the batteries. The steady state performance of the
proposed generator is studied at different values of battery
open circuit voltage, different values of the battery internal
resistance, and different ratios of rotor leakage reactance to
rotor resistance. Results revealed that the parameter that had
a significant effect on the machine performance is the ratio
of rotor leakage reactance to rotor resistance.
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