30-06-2012, 12:48 PM
Optimium Planning of Hybrid Renewable Energy System Using HOMER
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ABSTRACT
A hybrid renewable energy system may be used to reduce dependency on
either conventional energy or renewable system. Optimization of hybrid
renewable energy systems looks into the process of selecting the best
components and its sizing with appropriate operation strategy to provide
cheap, efficient, reliable and cost effective alternative energy. In this paper a methodology has been develop for optimum planning of hybrid PV-Wind system with some battergy backup.
INTRODUCTION
The application of renewable energy system has become an important alternative as power provider
in rural electrification program [10]. When the conventional sources are depleted and the price of oil reaching
its highest level. Applications of renewable energy at this location are through solar radiation via
photovoltaic (PV) panels, wind turbines and battery. Initially, the system is a single source system. However
a single renewable energy usually tends to be oversized to accommodate load demand. A combination of one
or more sources of renewable enegy called hybrid will improve load factors and help on maintainence and
replacement costs as the renewable can complement each other [1]. However the evaluation of the correct
type of renewable energy system needs to be done so that the system can be optimized [10].
Solar PV Panels
As per the proposed work we are consider that there are ten PV panels with each has a capacity of
1Kw. The initial cost of the panels is $7000 and replacement cost for each panel is $7000. The lifetime of the
panels will consider to be 20 years. The monthly average daily solar radiation in Yavatmal is between 5.24
Kwh/m2/day with the monthly average daily sunshine duration ranging from six to eight hours as shown in
table 2. These values are important for sizing of solar energy system.
Wind Turbine
The wind turbine has a capacity of 1 Kw, its initial cost is $2100 and its replacement at $1800.
Annual operation and maintance cost is $50 per year. Its hub and anemometer is proposed to located at 25 m
height. Lifetime is assmed for 15 years. The average wind speed for this location shown in table 3.
CONCLUSION
The result from simulation of integrated renewable sytem in HOMER shows that solar PV generator
with battery and inverter is the most economical solution over PV- Wind with battery, to design integrated
system with minimum total net present cost and cost of electricity. Comparision of optimization results
of both the hybrid systems depicts that the first combination is economical. Though the different RESs are
technically suitable and available in market, but not necessarily be financially viable. Hybrid design should
be such that the component selection for electricity production must be economical. Economical viability
should be in top priority over the technical feasibility exclusively for rural electrification in rural part of
country like India as the end users have least pay capacity due to weaker economic status.