This presentation discusses a wind farm project using 660V 50Hz doubly fed induction generator (DFIG) technology. It introduces wind turbines and wind farms, explaining how they convert kinetic wind energy to electrical energy. Horizonal axis wind turbines (HAWT) are discussed. The presentation covers the main components of a HAWT including the rotor blades, main gearbox, generator, and other systems. It then explains how DFIGs work, their advantages over other generator types particularly for grid integration, and their suitability for use in wind turbines.

1. Nordex Wind Farm
Presentation on 660V
50Hz Doubly Fed Induction
Generator

2. Msindisi Mtengwane
211273201
Practise 2 Report

3.  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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 Converts Kinetic Energy
 from wind to mechanical energy
 Electrical Energy

5.  Vertical Axis Wind Turbines (VAWT)
 Horizontal Axis Wind Turbines (HAWT)
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Pitch
Drives
Rotor Blade
Lubrication
System
Main
Gearbox
Yaw Motor
Hub
AC
generator
Hydraulic
System
Yaw Break
System
High Speed
Shaft

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9.  Produce 2.5MW
 Power in wind is calculated as follows:
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11.  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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12.  An area of land with a group of energy-
producing windmills or wind turbines
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17.  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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18.  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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20.  Relationship between frequency and generator
speed in SFIGs can be expressed as follows:
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21.  The DFIG functions in a similar but different
way.
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22.  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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 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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27. 1. http://en.wikipedia.org/wiki/Wind_turbine#mediaviewer/File:HAWT_and_VAWTs_in_ope
ration_medium.gif
2. 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=25DuPhQe
LokOOM%3A%3BUyM-
GoIFv39RQM%3B25DuPhQeLokOOM%3A&imgrc=25DuPhQeLokOOM%253A%3B7hBNECy
A54lpCM%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/DFIGinWindTurbi
ne.pdf
4. https://www.labvolt.com/downloads/86376_F0.pdf
5. http://proofthatblog.com/category/question-marks/
6. http://www.nordex-online.com/en/products-services/wind-turbines.html
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