Sager Island Wind Diesel Project
Comprises of: 10 x AEP 15/55 Windgenerators, WDICS Control System, 2 x 180 kVA Diesel Generator
AProject of: West Bengal Renewable
Energy Development Agency (WBREDA).
Funding: Ministry
of Non-Conventional Energy Sources,
Indian Canadian Environment Fund
WBREDA
Turn-key Contractor: Auroville Wind Systems/ Auroville Energy Products
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. With a wind power capacity of 500 kW and diesel generating
capacity of 280 kW this plant is supplying electricity to the surrounding Villages.
The novelty of this project is the use of standard asynchronous wind generators
with 100% penetration. 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 a specially developed controller simulates the grid with modified
Diesel Generators and a Frequency Control Load. Once the Wind generators are
operational, the Diesel Generators are shut off. 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. The excess electricity
generated at times of high wind velocity will be used to operate an ice plant,
which has been requested by the fisher community.
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 AEP 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 winch.
The first phase of the project consisting of 2 Wind-generators and the fully
integrated Wind-Diesel-Control System (WDICS) was completed in February 2002..
The Chief Minister of West Bengal inaugurated the project in March 2002. Performance
through the first 12 months has proved very successful.
Technical Layout:
10 Wind Generators, 2 x 180 kVA Diesel Generators, Control Load
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 tower.
Detail Hinged Tower-leg
Tilt-up procedure of fully assembled turbine.
Schematic Drawing of Diesel-Slip-clutch arrangement:
Diesel Genset with modified base-frame (slip clutch not yet installed).
Power Synchronization Unit
System Control and Monitoring, Main-frame computer: Shows real-time performance
of all system components. Wind-turbines, Diesel Generators, Slip-clutch status
and Load.
Computer Training at Site
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