IRP Presentation - Iowa State University

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Advisor: Venkataramana Ajjarapu
May 10-17 Project Team
Elsammani Ahmed Hassan Burawi
Brandon Janssen
Kenneth Thelen
Functional Requirements
Supply stand-alone load
 Simulate wind
 Maximize turbine
power use

Display turbine and
battery power
 Measure turbine speed

Resource Requirements
Item
Cost
Coupling
$112
Current Transducer
$21
Stop Switch
$16
Display Materials
$15
Kikusui Power
Supply
3-phase AC Motor
$0
Total
$164
$0
Schedule
Wind Turbine/Inverter



Air X 400W
24VDC
Internal voltage
regulation/charge
control





Outback GTFX2524
24VDC
2500VA Operation
Grid-tie Inverter
Internal over current
and under voltage
protection
Three Operating Situations

Wind Power=Load
200W
100W

200W
100W
200W
Wind Power<Load
300W

0W
Wind Power>Load
100W
200W
Turbine Drive
• Turbine coupled with
3-phase induction
motor
• Motor controlled with
adjustable power
supply
• Kikusui PCR 6000W
• Power supply
controlled with
LabVIEW
DC Sensors



LEM LA 55-P
Current Transducer
Battery and Turbine
Current
Voltage Divider
RPM Sensor




Hardware Design
NI USB 6008 DAQ
LabVIEW
Universal Use
Receiver
Transmitte
r
LabVIEW Interface

Sensor Readings

Motor Control

Charge Control
Sensor Readings

Read values in from sensors

Used DAQ, NI USB-6008

Multiplied readings
 Voltage by 7.926
 Current by 10
Motor Control
Provided by Zhongjian Kang
 Used from library

 On/Off
 Voltage and Frequency control
Single input
 Ratio of 220 V / 50 Hz

Charge Control

Done using conditional
statements

Compared battery voltage

Compared battery current
Testing

Sensor Readings

 With power supplies
 Unable to use
 In system
 Needs values from
 Changed voltage
battery
 Manual operation
multiple

Charge Control
Motor Control

RPM Sensor
 With complete system
 Hardware
 Problems
 DAQ and Software
 Delayed Response
 Fluctuations
 In System
Testing(contd.)

DC Sensors
 Verified with analog
sensor readings

Motor Coupling
 Vibrations
 Proper Leveling
Power vs Speed
400
Power (Watts)
350
300
250
200
150
100
50
0
0
500
1000
Speed (RPM)
1500
2000
Conclusion
In the beginning of this project, we had very high hopes. There were a
lot of different aspects we hoped to expand upon from the previous
group, and a lot of interesting ideas we wanted to implement.
Unfortunately, due to the budget constraints halting the installation of
the turbine outside, and the loss of much of the previous teams work,
many of these ideas were not realized. However, we are happy that
we have provided a more professional and useable test-bed for the
turbine, as well as a RPM sensor that may be used for a plethora of
different projects in the future. Our only objective that we expected to
deliver upon and failed was the full utilization of available wind power.
Throughout this semester, many different solutions for this problem
were brought up, but each of them failed to accomplish what we
wanted. The final idea of simulating pitch control through the software
interface is one that we are confident will work, but bugs in the design
of the control as well as time constraints on designing and testing it
have made it impossible to complete. All of this being said, our group
wishes to thank Zhongjian Kang, Lee Harker, and Dr. Ajjarapu for all
their help and support throughout the project.
Questions?
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