Wind Turbine Energy Conversion System Design and Integration Advisor: Venkataramana Ajjarapu 2009 Project Team Elsammani Ahmed Hassan Burawi Brandon JanssenLuke Lehman Kenneth Thelen

Problem Statement This is a continuation project. The ongoing project involves the design of a wind turbine energy conversion system that can be integrated to electrical power grid in the Coover hall power lab. It also includes a display system to indicate the output power from the wind turbine. The generator is rated around 400W. The wind turbine will be installed on the roof of the Coover Hall. All the protection and control aspects of the conversion system become part of the design. The extension of the project includes the design requirements to supply stand alone load in conjunction with the grid supply. At low wind speeds the system is supplemented by the grid source.

Conceptual Sketch

Intended Users and Uses Users ISU students ISU faculty and staff Uses Supplement power to Coover Grid Power standalone load Provide an educational and demonstration component

Operating Environment Coover Hall Roof- Turbine (Permanent) Coover Hall Lab-Inverter and Controls (Permanent) Coover Hall Lab-Turbine System (Testing)

Requirements Integrate with current team Supply Power Grid Supply stand alone load Meet grid standards Budget Safety Accessibility

Requirement Changes Provide test-bed for additional sources Display power levels from grid/turbine

Constraints Meeting budget constraints of $ Meeting grid standards Meeting safety standards Accessibility: shall be able to use testing equipments to measure outputs of wind turbine Location of different system components

Standards IEEE 1547 Standard for Interconnecting Distributed Resources with Electric Power Systems NERC Docket PL Interconnection for Wind Energy and Other Technologies

Assumptions All goals of the group from last semester working on the project are accomplished Supply 200W load Grid frequency of 60 Hz Grid configuration is accessible to connect with load Turbine chosen to meet building codes, federal electrical regulations, fixed speed, etc.

Expected End Product and Deliverables Wind turbine power for standalone load Wind turbine power for grid operation Series of tests for Wind Turbine System Matlab simulation of wind turbine system (optional) User Interface for Display

Direction Changes Single phase vs. 3-phase Battery-less system Larger turbine External control for educational purposes Load control

Wind Turbine Southwest Windpower Air X 400 Rotor Diameter46 in. Weight13 lb Start-Up Wind Speed8 mph Voltage24 VDC Rated Power400 watts at 28 mph Turbine controllerMicro-processor based smart internal regulator BodyCast aluminum Blades3-Carbon fiber composite Overspeed ProtectionElectronic torque control Kilowatt Hours/Month38 kWh/mo at 12 mph Survival Wind Speed110 mph

Turbine Output

Non-ideal Features Battery Bank Requirement Regulation Mode Internal Controls Low Power Output

Alternative Turbines Southwest Windpower Whisper 200 Raum Energy Rated Power Output: 1 kW1.5 kW

Inverter Outback GTFX2524 Nominal DC Input24 VDC Continuous Power Rating2500 VA AC Voltage/Frequency120 VAC 60 Hz Continuous AC RMS Output20.8 Amps AC Idle Power6-20 Watts Typical Efficiency92% Total Harmonic Distortion2-5% Output Voltage Regulation± 2% Maximum Output Voltage50 amps AC RMS AC Overload CapabilitySurge 6000 VA 5 seconds4800 VA 30 minutes3200 VA AC Input Current Max60 amps AC AC Input Voltage/Frequency VAC Hz DC Input Range21-34 VDC Weight56 lbs

Interface Sketch

System Schematic

Testing Full range of turbine Inverter operation with load Fabricating test equipment Ensuring proper gauge wiring is used Safe connections and switching

Resource Costs ItemCost Air X 400 W Wind Turbine$750 Outback GTFX2524 Inverter$1800 Batteries$750 Microcontroller$25 Controller wiring and misc$20 Turbine Mounting Materials$250 Thick Gauge Wiring$175 Sensors$100 Insulated Ring Tung Terminations$10 Conduit$100 Labor632 Hours Estimated Total$3980

Projected Hourly Work Brandon Janssen Luke Lehman Kenny Thelen Hassan Burawi Elsammani Ahmed Project Reporting Problem Definition Project Design Research Standalone Testing Documentation Web Design Totals

Updated Schedule

Questions