Deering Wind-Diesel Hybrid Feasibility Study Report Final Report August 26, 2011 Douglas Vaught, P.E. V3 Energy, LLC Eagle River, Alaska Deering Wind-Diesel Hybrid Feasibility Study Page | i This report was prepared under contract to WHPacific for a Northwest Arctic Borough project to assess the technical and economic feasibility of installing wind turbines in a wind-diesel hybrid power system design for the village of Deering, Alaska. Contents Executive Summary ....................................................................................................................................... 1 Introduction .................................................................................................................................................. 2 Village of Deering ...................................................................................................................................... 2 Potential Alternative Energy Resources.................................................................................................... 2 Public Participation ................................................................................................................................... 3 Deering’s Electric Power System ................................................................................................................... 4 Heat Demand ............................................................................................................................................ 4 Operational Issues .................................................................................................................................... 5 Wind Power System Configurations and Equipment .................................................................................... 5 Storage Options ........................................................................................................................................ 6 Wind-diesel Integration Controls .............................................................................................................. 7 Wind Project Site .......................................................................................................................................... 8 Wind Resource .......................................................................................................................................... 9 Development of the Met Tower Site ...................................................................................................... 10 Preliminary Geotechnical Review ........................................................................................................... 11 Development of the Alternate Wind Power Site .................................................................................... 11 Environmental Review ................................................................................................................................ 11 Alaska Pollution Discharge Elimination System ...................................................................................... 11 U.S. Fish and Wildlife Service .................................................................................................................. 12 Federal Aviation Administration ............................................................................................................. 12 Alaska Department of Natural Resources ............................................................................................... 12 US Army Corps of Engineers ................................................................................................................... 12 Proposed Conceptual Designs of Deering Wind-Diesel Systems ................................................................. 13 Low Wind Penetration, No Changes to Power Plant .............................................................................. 13 Configuration Options ......................................................................................................................... 13 Comparison Project ............................................................................................................................. 14 Deering Site for Low Penetration Wind .............................................................................................. 14 Deering Wind-Diesel Hybrid Feasibility Study Page | ii Low Wind Penetration, Diesel Powerplant Improvements .................................................................... 14 Medium Wind Penetration ..................................................................................................................... 14 Medium Penetration Comparison Projects ........................................................................................ 15 Deering Site for Medium Penetration Wind ....................................................................................... 15 High Wind Penetration ............................................................................................................................ 15 High Penetration Comparison Projects ............................................................................................... 16 Deering Site for High Penetration Wind ............................................................................................. 16 Wind Turbines ............................................................................................................................................. 16 2 to 9 kW Range Turbines ....................................................................................................................... 16 Eoltec Scirocco .................................................................................................................................... 17 MC Energy 17/5 .................................................................................................................................. 17 Proven 11 ............................................................................................................................................ 17 Skystream 3.7 ...................................................................................................................................... 17 10 to 49 kW Range Turbines ................................................................................................................... 17 Bergey Excel ........................................................................................................................................ 17 Gaia-Wind 133-11 kW ......................................................................................................................... 18 MC Energy 31/15 ................................................................................................................................ 18 Proven 35-2 ......................................................................................................................................... 18 Renewegy VP-20 ................................................................................................................................. 18 50 to 100 kW Range Turbines ................................................................................................................. 19 Northern Power Systems Northwind 100 ........................................................................................... 19 Vestas V15 and V17 ............................................................................................................................ 19 Wind Turbine Performance Comparison ................................................................................................ 20 HOMER Modeling........................................................................................................................................ 21 Electric Load ............................................................................................................................................ 21 Thermal Load .......................................................................................................................................... 22 Wind Resource ........................................................................................................................................ 23 Diesel Generators ................................................................................................................................... 23 Technical and Economic Analysis ................................................................................................................ 25 Scenario-specific Cost Assumptions........................................................................................................ 26 Scenario 1, Low Penetration Wind, No Powerplant Upgrade ................................................................ 28 Bergey Excel, 24 meter hub height ..................................................................................................... 28 Deering Wind-Diesel Hybrid Feasibility Study Page | iii Eoltec Scirocco, 18 meter hub height ................................................................................................. 28 MC Energy 17/5, 24 meter hub height ............................................................................................... 28 Skystream 3.7, 24 meter hub height ................................................................................................... 29 Scenario 2, Powerplant Improvements