Sager Island Wind Diesel Project
Desiged capacity: 10 x AWS 15/50 Windgenerators,
WDICS Control System, 2 x 180 kVA Diesel Generator
A Project of: West Bengal Renewable
Energy Development Agency (WBREDA).
Funding: Ministry of Non-Conventional Energy Sources,
Indian Canadian Environment Fund
Turn-key Contractor: Auroville Wind Systems
Sagar Island is a small Island in the Delta of the Ganges
River in the Bay of Bengal. The Southernmost point of the Island is the
Site for the Wind Diesel Power generation plant. Sagar Island is not electrified
via the main land. Currently a capacity of 200 kW wind power and diesel
generating capacity of 280 kW are installed. The plant is supplying electricity
to the surrounding Villages.
The novelty of this project is the use of standard asynchronous wind generators
with diesel generators. Under normal circumstances these generators require
a utility grid in order to operate and in this configuration the grid
will only allow a maximum of 20% - 30% wind power before becoming unstable.
In this project modified Diesel Generators achieve the frequency and load
controll. Once the Wind generators are operational, the Diesel Generators
are running at reduced load. This allows considerable fuel savings.
Primary use of the generated power is for lighting, domestic use, educational
centres and power supply to small industries. Thus the plant contributes
to improve the socio-economic conditions on the island.
All components of the plant were chosen for their size and light weight
as there is no heavy lifting equipment available on the Island and the
ferry servicing the Island has a limited carrying capacity. The Wind generators
are AWS 15/55 asynchronous machines with 15 meter blade diameter. On windy
days continuous power output of 62 kW was observed. Towers and wind generators
were transported in parts to site. The horizontally assembled wind turbines
and towers were tilted up over hinged tower legs with a manually operated
The first phase of the project with 2 Wind-generators was completed in
February 2002. The Chief Minister of West Bengal inaugurated the project
in March 2002. In 2004 2 more machines were installed and currently further
3 machines are being added.
Typical System-Load sharing monitored between 1800-0000
hours on June 9th 2002.
Wind-turbine 1 and 2 are being unloaded at Site.
Wind-turbine and blades are being assembled on the horizontal
Detail Hinged Tower-leg
Tilt-up procedure of fully assembled turbine.
Power Synchronization Unit
System Control and Monitoring, Main-frame computer: Shows real-time performance
of all system components. Wind-turbines, Diesel Generators, status and
Computer Training at Site