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March 2012 - Michigan Energy Forum - Carmen Bender
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March 2012 - Michigan Energy Forum - Carmen Bender

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Wind farms are growing in many parts of Michigan as the price to generate electricity by turbines drops. Once the decision is made to move forward with wind, what happens next? ...

Wind farms are growing in many parts of Michigan as the price to generate electricity by turbines drops. Once the decision is made to move forward with wind, what happens next?


Join us as we discuss answers to the questions below:


· What are the steps followed to site a wind farm?

· How are the locations determined?

· How are the turbines selected?

· Who does the construction?

· How is financing handled?

· What are the long term maintenance issues?


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March 2012 - Michigan Energy Forum - Carmen Bender March 2012 - Michigan Energy Forum - Carmen Bender Presentation Transcript

  • Michigan Energy ForumMarch 1, 2012Topic: How a Wind Farm Gets Built – Construction phase
  • Agenda• From Development to Selecting a Contractor• Design/Permitting/Contractor Coordination• Key construction aspects• Construction order and pictures 2
  • Typical Schedule Project Development Permitting Design Procurement ConstructionStart Year 1 Year 2 Year 3 3
  • Selecting a Contractor Request for Negotiations Proposal (Liquidated Execute (Experience, Price, Damages, Limits of the Liability, Insurance, Safety Record, Price, Force Contract Balance Sheet) Majeure) 4
  • Design and Work Plan Coordination 5
  • What Is A Wind Farm?• A wind farm is an energy project consisting of: – Wind Turbines – Foundations – Roads – Underground Electrical Collection System – Substation & Transmission – SCADA System – O&M Facility 6
  • Permitting: Most Common for Wind Projects• National – FAA Review – Endangered Species Act Review – Bald Eagle Protection Act – Migratory Bird Protection Treaty• State – Historical Preservation – Stormwater Discharge – Highway Occupancy – Michigan Tall Structures Act• Local – Conditional Use Permit – Building/Road/Construction permits• Most other permits avoided by careful siting 7
  • Procurement: Long-Lead Time ItemsWind Turbines: 6 - 9 months Cables: 0.5-1 Year, High Theft • Remaining Materials: Typically Within 20 Weeks, Significant Increases in Concrete, Steel and Copper Switchgear: 1 Year+ 8
  • Construction • Can Be Quickest Part of Project Development • About Half Involve Lower-Visibility Ground Work • Wind Turbine Erection Can Take Only A Few Days Per Turbine • Turbines Often Do Not Run for Weeks or Months After Erected While Balance of Plant Completed • Wind, Weather Can Slow Construction 9
  • Project Access Roads• Wind Turbine Access During Construction and Operation• Crane Access• Typically 40 ft Wide During Construction – Reduced to 16 - 20 ft Wide During for Operations• Final Width Graveled, Temporary Shoulders Just Compacted 10
  • Example Access Road 11
  • Wind Turbine Foundations Design Driven By - Wind Loading - Soil Conditions - Seismic Requirements Mat Foundation P+H Foundation 10 feet 30 feet 50 feet 12
  • Example Wind Turbine Foundations Mat Foundation P+H Foundation 13
  • Wind Turbines “by the numbers”• Blades (3) – Length per Blade: 138’                                                                                       – Weight per Blade: 13,700 lbs• Hub (Red) – Weight: 50,700 lbs• Nacelle – Length: 29’ – Width: 12’ – Height: 8’ high – Weight: 126,000 lbs• Tower Sections – Top, Mid(s) Base – Lengths very per Section from 50’‐70’ – Weight for Tower Assembled: 520,000 lbs• Foundation – Base and Pedestal:  384 yards of concrete (40 concrete Trucks) 1.4 million lbs of concrete – Weight of Reinforcing steel : 70,000 lbsTOTAL TOWER WEIGHT:     370 TONS 14
  • Wind Turbine Rotor Vestas V82GE 1.5MW sl 15
  • Wind Turbine Nacelle – Vestas V82 16
  • Wind Turbine Erection 17
  • Looking down from the top of a100 meter tower . . . 18
  • Electrical Collection System • Interconnect Each Wind Turbine to Substation • Collect Energy Generated 19
  • Project Substation and Transmission• Collects All Generation• Increases Power to Transmission Voltage• Sends Out on Grid – 40 kV (Thumb distribution) – 120 kV, 345 kV (Thumb transmission) 20
  • O&M/SCADA Center • Larger Projects Require On-Site Operations and Maintenance Facility • Can Be New Buildings or Existing Local Buildings 21
  • Q&A 22
  • Appendix 23
  • Wind Technology Blade Pitch System Gearbox & Generator • Adjusts angle of the blade for • 3 stage gears increase rpm of rotor shaft (~12rpm) braking & optimization to high rpm (~900rpm) of generator which converts • Electric motors or hydraulics mechanical energy into electrical energy NacelleRotor Blades• Made of glassfiber or carbon fiber• Up to 40 meters in length• LM Glassfibre or OEM Alstom Ecotecnia 100 shown in picture Tower Yaw Power Converter & Transformer • Between 40 to 100 m in height • Converts DC to AC for the grid • Manufactured in sections(rolled steel) • Step up turbine voltage 24
  • 330’ off the ground!Monroe Stakes 660’ Wind Turbine 330’ Transmission Tower 150’ 25
  • Typical 1.5MW Turbine 26
  • Developmental Factors – the siteFocus is different then other projectsWork Site-Typical work site size is 80+ square acresCollection Systems vs Field Tile-On average 2500 repairs/park.Documented with photos and GPSCrop Damage-Both during construction and the next planningseasonProperty Lines-100 years of assumed “property boundaries arediscovered.Actual property lines always a surprise to everyone. 27