Wind Turbine Simulation (Phase IV) SDMAY 12-24 Advisor: Dr. Venkataramana Ajjarapu SDMAY 12-24 Group Members Brian Alexander (Computer Engineering) Lon Bromolson (Electrical Engineering) Jarid Strike (Electrical Engineering) Chase Schaben (Electrical Engineering) SDMAY 12-24 Project Description Computer controlled motor is coupled with generator from wind turbine Turbine power is used to drive inverter w/ AC load Measurements are taken using DAQ USB-6008, and imported into LabVIEW SDMAY 12-24 Intended Use Laboratory Environment. Can be used for independent or for class purposes. Can be operated by anyone with basic knowledge of circuitry. SDMAY 12-24 Major Changes Last year’s system: Batteries are voltage source Wind turbine supplements power Weak motor New system: Wind turbine provides voltage source Batteries can be used as backup PC provides user-friendly interface SDMAY 12-24 Last Year’s System SDMAY 12-24 Functional Requirements The turbine circuitry will generate a 24V DC output for any simulated wind speed The turbine circuitry can supply 24V to any load variation up to 400 W System is easy to use for average undergraduate student Motor RPM can be set and maintained accurately SDMAY 12-24 Non-Functional Requirements The final project will include a user’s manual The project will be documented through technical manual and in-depth schematics Technology Requirements LabVIEW interface must accurately calculate variables and display them for the user to see All sensor and control equipment connected with LabVIEW SDMAY 12-24 Turbine Circuitry Internal circuitry needs 7 VDC to operate Battery must supply voltage to system By removing this circuitry and using the 3-phase generator directly, the turbine can provide voltage. SDMAY 12-24 New System Model SDMAY 12-24 SDMAY 12-24 Feedback Systems RPM Control RPM is monitored Slip is calculated Voltage is adjusted to maintain low slip (1%) Output Voltage Control Output voltage is monitored PWM duty cycle is adjusted to maintain output voltage (24V) SDMAY 12-24 SDMAY 12-24 Motor Issue Previous motor could not provide consistent highspeed output without overloading/overheating We replaced the 370W induction motor with an Ironhorse 1.5 HP induction motor This required a new bracket to mount the motor Figure from Wikipedia “File:VFD System.png” SDMAY 12-24 SDMAY 12-24 SDMAY 12-24 New System Model SDMAY 12-24 Rectifier and Buck-Boost Variable voltage/frequency 3-phase output from generator. Rectifier converts to 1-phase DC output. Buck-boost converter outputs compatible voltage levels to the inverter. SDMAY 12-24 MATLAB Model for Rectifier/Buck-Boost Circuit Schematics SDMAY 12-24 Pulse-Width Modulation Used to control switch in the buck-boost circuit. Circuitry controlled by LabVIEW via NI-DAQ. Varying switching frequency and duty cycle depending on the load. Feedback duty cycle control SDMAY 12-24 SDMAY 12-24 Organization – Plexiglas Boxes SDMAY 12-24 Testing Diode Rectifier Clean DC signal sent to Buck-boost. Buck-boost converter Signal outputs desired voltage level. PWM Able to control the width of modulation. Full System All circuits interact correctly. SDMAY 12-24 Testing Process SDMAY 12-24 Final System SDMAY 12-24 Total Cost and Time Spent $175 – 1.5 HP Motor $70 – Coupling/Mounting $50 – Hardware $55 – Circuitry $350 – Total $500 – Budget Research Design Implementation Testing Documentation SDMAY 12-24 Any Questions??