Design of Direct-Drive Wind Energy System

Jamal Hussain


The aim of this work is to discuss a novel configuration of a wind Turbine Generator System (WTGS)    equipped with a Variable Speed Generator.  Nowadays,  doubly- fed induction generators are  being  widely  used  on  WTGS, although synchronous generators  are  being  extensively  utilized  too. There are different types of synchronous generators, but the multi-pole Permanent Magnet Synchronous Generator (PMSG) is  selected for this prototype. It offers better performance due to higher efficiency and requires less maintenance since it does not have rotor current and can be used without a gearbox, which also implies a reduction of the weight of the nacelle and a reduction of costs. Paper discusses a new method for design of Small scale Wind Turbines. It uses Permanent Magnet Synchronous Generator (PMSG) in a direct-driven topology. PMSGs are preferable for Wind Energy Systems as per this research, where input power is always fluctuating like wind energy. A very unique configuration of Generator design has been chosen amongst various configurations. This configuration along with Vertical Axis and Direct Driven topology makes the project wind turbine very efficient. This simple prototype which costs less than 250 $ is capable of reaching 6.7% of Betz’s limit.

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