Perryville, Alaska village micro-grid cuts diesel use

Ten wind turbines offset use of costly imported diesel and provide redundant power source to a remote village.

All-in-all the turbines have been great for us. They were a good investment.
-Gerald Kosbruk, president, Perryville tribal government

Customer

Perryville, Alaska is a remote village of 250 residents that can only be reached by aircraft or boat. Prior to the installation of a 10-turbine micro-grid in 2007, the village ran on one diesel generator.

Objectives

  • Reduce dependence on imported fuel
  • Provide redundant power supply

Project Requirements

  • Generate electricity from locally available resources
  • Operate reliability and with few maintenance requirements
  • Tie to village’s micro-grid

Site Details

  • Average annual wind speed: 4.6 m/s (10.3 mph)1
  • Average solar insolation: 3.3 kWh/m2/day2
  • Location: 55.914389,-159.144917
  • Install date: November 2008

Solution

  • 10 Skystream 3.7 turbines, 21 m (70 ft) guyed towers
  • Turbines provide clean, ready-to-use AC power (no external inverter or controller required)
  • “Ahead of the meter” connection directly powers village micro-grid and offsets diesel use
  • Project cost: $150,000

Benefits

  • Annual energy produced in 2011: 34,816 kWh
  • Average energy produced in three years (2009, 2010, 2011): 29,311 kWh
  • Annual diesel offset: 19,200 liters (5,060 gallons)
  • Project payback: 4-5 years with fluctuating diesel prices
  • Permits village to run a smaller diesel generator
  • Reduces need for costly winter fuel import by air

Partners

  • Susitna Energy Systems
  • Village of Perryville electric utility

1. Perryville Wind Resource Report, V3 Energy LLC
2. U.S. Dept. of Energy’s National Renewable Energy Laboratory