Wind Turbine Design and ImplementationPhase II

IntroductionIn 2008 President Geoffrey introduced the Live Green Program which called for environmentally conscious living. In light of this initiative, it was decided to actively assemble a wind turbine that would supply power to Coover hall and reduce our carbon footprint. The previous group was able to purchase and design a working turbine system. Our goals where to add a user interface, sensors for voltages, currents, and RPM, and to supply a working demonstration. For the interface, we decided to use LabVIEW. This will display the currents, voltages, and powers for the entire system, as well as the RPM readings from the turbine. The voltage sensor is a simple voltage divider. For the current sensors, we used current transformers to lower the current to a lower level. The RPM sensor is a comparator circuit.. It uses infrared LEDs to for a transmitter and receiver. To supply a working demonstration, we obtained a motor and a coupling to turn the turbine. It was decided because of budget constraints not to place the turbine on the roof of Coover Hall. This decision meant we must properly simulate the wind driving the turbine and study the characteristics of it.

TestingIndividualSensorsUsed power supplies, and oscilloscopes to ensure that sensors are workingRPM SensorLabVIEW side tested with signal generatorHardware tested using LED at output, using reflective surface to ensure correct

operationAdjustable Supply/AC MotorPC and power supply were connected with GPIB-USB cablePower supply settings tested using LabVIEWMotor connected to supply, voltage and frequency set using PCInterfaceTo test the display, we simulated a load using a DC sourcePower output, voltage, and current levels were verified using the DC source

SubsystemsMotor/TurbineVerified coupling between turbine and motor are secureMeasured output of turbine as motor turned rotorAdjustable Supply/Turbine CharacteristicsStudied relation between 3-phase motor voltage/frequency and turbine outputDevelop relation that can be programmed through LabVIEWSensors & InterfaceUsing an multimeter and DC current sensors, verify that the interface is displaying the correct values

Entire SystemLarge Components/Control System/InterfaceAfter installation is complete, ensure the system is working properly , safely, and as expected

Team: May1017Website: http://seniord.ece.iastate.edu/may1017/E-mail: sd-may1017@iastate.edu

Advisor: Dr. Ajjarapu

Team Members:Elsammani Ahmed (EE)Hassan Burawi (EE)Brandon Janssen (EE)Kenneth Thelen (EE)

Design RequirementsFunctional RequirementTurbine will output a DC voltage of 24VDC Turbine’s output is 400WInverter supplies AC power to a loadSensors are connected to a data acquisition device (DAQ), and displayed on a LabVIEW interfaceWind power is simulated with a motor coupled with the turbineAn adjustable power supply is used to vary motor’s input to turbineNon-Functional RequirementsAll components comply with state and federal electrical regulations

SummaryWind energy is a crucial energy needed for the future. Wind is the cornerstone of renewable energy in this country. This project is our way of demonstrating how wind can be harnessed to produced clean energy along with a working interface to display properties of the system. With this project students will be able to see the output of this system on a minute to minute basis to perform experiments or to observe how great wind energy can be. It was also a study of how having certain control aspects of a turbine (mainly pitch control) can increase the Special thank you to our Zhongjian Kang, Lee Harker, Jason Boyde, and Dr. Ajjarapu for providing materials, advice, and help with our project.

InterfaceBuilt in NI LabVIEWDisplays DC currents, DC voltage, RPM of turbine, and

settings for adjustable power supplyConnects to NI 6008 DAQ and GPIB-USB cable for input and outputBuilt-in logic for controlling the charge of the battery bank

RPM SensorComparator designInfra red LEDs are used to create pulse read into NI 6008 DAQBuilt-in 32 bit counter of DAQ is usedComputation of RPM done in LabVIEWReads from the coupling between motor and turbine

Motor Drive/Adjustable SupplyKikusui PCR 6000W Adjustable Power Supply3-phase AC motorPower supply connected using GPIB-USB cableVoltage and frequency of supply are set using LabVIEW Interface

Project Hours and CostItem CostCoupling $112Current Transducer $21Stop Switch $16Display Materials $15Kikusui Power Supply $03-phase AC Motor $0Total $164

29%

27%22%

23%

Hours

BrandonKennyHassanElsammani