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New Energy Award 1999
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Application Category
Hybrid Wind Power Generation System for Remote Islands
Winner
Okinawa Electric Power Co.
Okinawa New Energy Development Co., Ltd.
Hitachi Limited
Hitachi Engineering & Service Co., Ltd. |
Features of Equipment, Systems and Facilities
Electric power for remote islands has been supplied by using small-scale
diesel generators, in which power cost is relatively high.
The commended system is installed in a remote island in Okinawa. It is a hybrid system composed of a 280 kW wind power generator and 5 units of diesel generator.
Specifications
| Wind power output |
280 kW |
| Diesel output |
5 units, 750 kW in total
(Hateruma Island) |
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5 units, 1,050 kW in total
(Tarama Island) |
| AC-DC converter |
300 kW |
| Battery capacity |
400 kWh (Hateruma Island) |
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600 kWh (Tarama Island) |
| Control Functions |
Diesel generator is controlled to automatically turn on/off depending upon wind power output.
Storage battery for leveling wind power output, compensating power output in response to abrupt changes in wind power and discharge control for peak demands.
Frequency variation within ± 0.3 Hz, when operating the wind turbine.
Voltage control by AC/DC converter (power factor control) |
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Wind turbine (280 kW) |
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