Seminar power point presentation

1. School of Electrical Engineering and Computing
Department of Electrical Power and Control Engineering
Power stream.
Scientific research methods(EPCE 7101)
Adama-II Wind Farm
Name id no.
Alemach kahsay………………………pgr/24707/14
Feb,2023
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2. Outlines
Introduction to Adama-II wind farm
Types of Wind farm
Components of Adama-II wind farm
Sample Components of Adama II Wind Farm
Controlling room (Scada System )
Parameters of the wind turbine at Adama-II wind farm
Conclusion
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3. Introduction to Adama-II wind farm
 Adama-II Wind Farm is located in the southeastern part of the country, 95 km
from Addis Ababa and 7 km from Adama town.
In this wind farm there are 102 turbines and the rated capacity of each turbine, 1.5
MW.
The installed power capacity of the farm is 153 MW with two transformers each
with rated capacity of 90 MVA .
Each turbine generates 690V and this voltage level is stepped up in to 33kV using
step up transformer.
Also the 33kV is stepped up to 230kV and the outgoing line is connected to the
Koka switch yard (Substation) through a single circuit overhead line.
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4. Types of Wind generator
Type 1: Fixed Speed (Induction
Generator) Wind Turbine
Generator operates at fixed speed due to
its direct grid connection.
 No reactive power control capability,
Additional devices required.
Advantages: Cheap price, simple
design and robustnes.
Disadvantages: controllability
relatively poor (P and Q)
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fig.1. Type 1 wind generator

5. Type 2: Variable Speed Wind Turbine (Induction
Generator) with Variable Rotor Resistance
Turbine setup is same as for Type 1
but,Wound rotor induction generator
(WRIG) with external rotor resistance
for variable speed.
 Higher slip by external rotor
resistance, variable speed operation
but increasing losses
Pitch control is used for limitation of
aerodynamic power above rated wind
speed.
Advantages: Simple concept for
variable speed operation.
Disadvantages: Reactive power
compensation requirements. 5
fig.2. Type 2 wind generator

6. Type 3 : Doubly-fed induction generator wind turbine
Pitch-controlled aerodynamic rotor is
coupled via gearbox to the generator.
Doubly-fed induction generator
(DFIG) provides variable speed
operation by partial-scale frequency
converter in the rotor.
Advantages: No reactive power
compensation required, Full control of
active and reactive power.
Disadvantages: Crow bar may be
needed for severe faults →no reactive
power control during connected crow
bar.
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fig.3.Type 3 wind generator

7. Type 4: Variable speed wind turbine with full-scale converter
Generator connected to a full-scale
frequency converter.
Guarantee of reactive power
compensation and smooth grid
connection by the converter.
Advantages: No reactive power
compensation required, Full control of
active and reactive power.
Disadvantages: Frequency converter
rating 100% of rated power (more
expensive, more losses.
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fig.4. Type 4 wind generator

8. Components of Adama-II wind farm
Rotor
• The rotor is the rotating part of a turbine.
It consists of three blades and the central part that the blades are
attached to the hub.
• Hub
• Is used to hold the blades and make it possible for them to rotate with
respect to the rest of the turbine body.
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9. Cont...
• Nacelle
• Nacelle is housing on top of the tower that accommodates all the
components that need to be on a turbine top.
• Generator
• Is the component that converts the mechanical energy of the rotor,
harnessed from wind to electrical energy.
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10. Sample Components of Adama II Wind
Farm
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fig.5.Adama II wind farm sample

11. Cont…
The wind blade rotates with 19rev/min due to this low speed,
Gear box is connected on the low speed shaft side to increase
the speed of the blade to 1800rev/min.
 Yaw system changes the turbine in to wind direction.
Also the farm uses manually and hydraulic breaking
mechanisms.
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12. Parameters of the wind turbine at Adama-II
wind farm
Parameters unit Quantity
Blade number 3
Length of each blade m 37
Number of turbines 102
Group of turbines 8
Rating capacity MW 153
Cut-in m/s 3.5
Rated wins speed m/s 12
Average wind speed m/s 9.55
Cut-out wind speed m/s 25
Tower height m 70
Low speed shaft rpm 19
High speed shaft rpm 1800
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Table 1 Parameters of the wind turbine at Adama-II wind farm

13. Controlling room
Scada System
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fig.6.Scada system

14. Cont…
In the SCADA system there are four indication colors. These
are,
Red color indicates fault,
 Yellow color indicates maintenance ,
 Green color indicates the turbine is functioning and
Silver color indicates the turbine did not get enough air.
Adama wind farm II uses Double Feed Induction Generators
(DFIG) because they can supply power both in stator and
rotor sides.
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15. Conclusion
The installed power capacity of the farm is 153 MW with two
transformers each with rated capacity of 90 MVA .
Type 4: Variable speed wind turbine with full-scale converter is more
accurate but,more expenssive type of wind generator and type 1 is cheap
and simple dessign.
Scada System is a computer program that is used to control the wind
turbines.
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16. I have finished my presentation
THANK YOU!!!
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