Design of Boost Circuit for Wind Generator

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Author(s) 
N.Prasanna Raj, M.Mohanraj, Rani Thottungal 

KEYWORDS 
wind power generator, rectifierinverter circuit, pulse width modulation (PWM), interleaved boost converter, soft switching


ABSTRACT 
This paper presents the design and implementation of a power converter for an autonomous wind induction generator (IG) feeding an isolated load through the PWMbased novel softswitching interleaved boost converter. The output voltage and frequency of the wind IG is inherently variable due to random fluctuation of windspeed variation. The interleaved boost converter composed of two shunted elementary boost conversion units and an auxiliary inductor. This converter is able to turn on both the active power switches at zero voltage to reduce their switching losses and evidently raise the conversion efficiency. Since the two paralleloperated elementary boost units are identical, operation analysis and design for the converter module becomes quite simple. A threephase induction machine model and a threephase rectifierinverter model based on abc reference frame are used to simulate the performance of the generation system. It can be concluded from the simulated results that the designed power converters with adequate control scheme can effectively improve the performance of output voltage and frequency of the IG feeding an isolated load.


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