wil oral presentation

WIND TURBINE GENERATOR PROJECT

Nordex Wind Farm Presentation on 660V

50Hz Doubly Fed Induction Generator

Msindisi Mtengwane211273201

Practise 2 Report

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Introduction Welcome What is a wind turbine? What is a wind Farm? The different aspects of a wind Farm. Doubly Fed Induction Generators (DFIG) Advantages of using DFIGs Conclusion Questions

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What is a wind turbine? Converts Kinetic Energy from wind to mechanical energy Electrical Energy

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Different kinds of WTG Vertical Axis Wind Turbines (VAWT) Horizontal Axis Wind Turbines (HAWT)

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Horizontal Axis Wind Turbine

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Parts of The Turbine

Pitch Drives

Rotor Blade

Lubrication System

Main Gearbox

Yaw Motor

Hub AC generator

Hydraulic SystemYaw

Break System

High Speed Shaft

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Inside the N90/2500

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Produce 2.5MW Power in wind is calculated as follows:

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Sample Calculation

p = 0.95 r = 43m v = 12m/s µc = 0.59

P = [½(0.95)[∏x(43)²](12)³]x0.59=2.8MW

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What is a Wind Farm?

An area of land with a group of energy-producing windmills or wind turbines

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Wind Farm

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Wind Farm

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Doubly fed Induction Generator (DFIG)

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What is a DFIG? DFIGs are inductions machines that feed

AC currents out of both the stator and the rotor.

They are mostly 3 phase wound-rotor induction machines.

Singly Fed Induction Generators (SFIG) output AC currents on the stator windings

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Advantages of DFIGs over SFIDs Amplitude and frequency of output voltage can be kept

constant regardless of shaft speeds.

This makes DFIGs ideal for grid coupling as they can remain continuously in sync.

The sync speed of this synchronous generator can be varied

by simply altering the frequency of the AC current that is fed into the rotor windings.

Power factor can also be controlled in DFIG machines

DFIGs are ideal for use in Wind Turbines for the above reasons.

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Relationship between frequency and generator speed in SFIGs can be expressed as follows:

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The DFIG functions in a similar but different way.

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Unlike the magnetic field in the stator windings of SFIGs, DFIGs have a none static magnetic field created across the rotor.

This field also rotates at a speed proportional to the frequency of the current fed into the rotor windings .

This magnetic field rotation can either be clockwise or counter-clockwise depending on the rotation of the prime mover.

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Conclusion The technology for DFIGs had been

available for a long time.

The growth of the wind industry has provided a platform for greater heights to be reached.

Applications stretch from the old 1.5MW generator to the most recent multi-MW turbines in industry today

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References1. http://en.wikipedia.org/wiki/Wind_turbine#mediaviewer/File:HAWT_and_VAWTs_in_o

peration_medium.gif2. https://www.google.co.za/search?

q=nordex+nacelle&biw=1280&bih=671&source=lnms&tbm=isch&sa=X&ei=etJlVPunOcLxaJT3gbAH&ved=0CAYQ_AUoAQ#facrc=_&imgdii=25DuPhQeLokOOM%3A%3BUyM-GoIFv39RQM%3B25DuPhQeLokOOM%3A&imgrc=25DuPhQeLokOOM%253A%3B7hBNECyA54lpCM%3Bhttp%253A%252F%252Fwww.nordex-online.com%252Fmicrosites%252Fdelta%252Fcontent%252Fwpeg%252Ffeatures%252Fnordex_drive_train_concept.jpg%3Bhttp%253A%252F%252Fwww.nordex-online.com%252Fmicrosites%252Fdelta%252Fen%252F%3B510%3B350

3. http://web.mit.edu/kirtley/binlustuff/literature/wind%20turbine%20sys/DFIGinWindTurbine.pdf

4. https://www.labvolt.com/downloads/86376_F0.pdf5. http://proofthatblog.com/category/question-marks/6. http://www.nordex-online.com/en/products-services/wind-turbines.html