ABSTRACT:
There are many loads such as remote villages, islands,
etc. that are located far away from the main grid. These loads require
stand-alone generating system, which can provide constant voltage and frequency
for local electrification. Locally available wind power can be used in such
off-grid systems. As the wind speed is variable, an AC-DC-AC conversion system
is required to convert variable voltage and variable frequency power generation
to constant voltage and constant frequency source. Further, as the wind power
as well as load is variable there is a need of energy storage device that take
care of the load mismatch. In this paper, a standalone wind energy conversion system
(WECS) using a variable speed permanent magnet synchronous generator (PMSG) is
proposed with a battery energy storage system.
KEYWORDS:
1.
Wind energy
conversion system
2.
Isolated
system
3.
BESS
4.
Permanent
magnet synchronous generator
SOFTWARE: MATLAB/SIMULINK
Fig.1
PMSG with PWM rectifier with battery for storing the extra wind energy
EXPECTED SIMULATION RESULTS:
Fig.2.
Variation of wind speed, load voltages, load currents, generator power, battery
power, load power battery current and DC link voltage.
CONCLUSION:
The
isolated operation of wind energy conversion system requires AC-DC-AC interface
with the capability of converting variable voltage variable frequency to
constant voltage constant frequency source. In addition the power balancing has
to be done with some energy storage system, According to the proposed topology,
battery energy storage system provides power balance between the generated
power and the load. The power mismatch is absorbed by the BESS.
REFERENCES:
[1]
Bhim Singh and Gaurav Kumar Kasal, “Solid-State Voltage and Frequency
Controller for a stand alone wind power generating system,” IEEE Trans. Power
Electronics, vol. 23, no.3, pp.1170–1177, 2008.
[2]
Bhim Singh and Gaurav Kumar Kasal, “Voltage and Frequency Controller for a
3-Phase 4-Wire Autonomous Wind Energy Conversion System” accepted for
publication in IEEE Trans. on Energy Conversion.
[3]
Ghosh and G. Ledwich, Power Quality Enhancement Using Custom Power Devices.
Kulwer Academic, 2002.
[4]
Gipe, P. Wind power’, Chelsea Green Publishing Company, Post Mills, Vermount,
USA,1995.
[5]
Rai, G.D. (2000) ‘Non conventional energy sources’, Khanna Publishers, 4th
Edition, New Delhi (India)
