WIND TURBINE TECHNOLOGY WIND TURBINE TECHNOLOGY Electrical System Electrical System Gerhard J. Gerdes Contents Module 2.2 Contents Module 2.2

Module 2.22.2-2

WIND TURBINE TECHNOLOGY Electrical System Gerhard J. Gerdes

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Workshop on Renewable Energies November 14-25, 2005 Nadi, Republic of the Fiji Islands

Contents Module 2.2

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Types of generator systems Variable and fixed speed Inverter technologies

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Types of generator systems

Converter type

Application

induction (asynchronous) generator

applied in a large number of turbines (Danish type)

synchronous generator

only used for a small number of small wind turbines, mainly for stand alone systems

asynchronous or synchronous generator with electronic inverter system

a widely used concept for variable speed machines, increasing applications with growing size of wind turbines

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Generator concepts of today’ today’s commercially available turbines

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number of different types

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one speed two speed variable speed

12 10 8 6 4 2 0

30 kW -