IRP Presentation - Iowa State University

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 PowerLoad

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?