21-05-2012, 03:35 PM
Modeling of PV Array and Performance Enhancement by MPPT Algorithm
Modeling of PV Array and Performance.pdf (Size: 141.06 KB / Downloads: 52)
INTRODUCTION
Solar energy is one of the most important
renewable energy sources. Compared to
conventional non renewable resources such as
gasoline, coal, etc..., solar energy is clean,
inexhaustible and free.
In tropical countries like India, as well as other
places where solar energy is available in
abundance, photovoltaic (PV) has emerged as a
major candidate for meeting the energy demand. It
offers an option for clean (pollution free) energy
source, with almost no running and maintenance
cost.
In the recent past years, PV power generation
system has attracted more attention due to the
energy crisis and environment pollution.
Photovoltaic (PV) power generation systems can
mitigate effectively environmental issues such as
the green house effect and air pollution. PV power
generation systems have one big problem that the
amount of electric power generated by PV module
is always changing with weather conditions, i.e.,
irradiation. Therefore, a maximum power point
tracking (MPPT) control method to achieve
maximum power (MP) output at real time
becomes indispensable in PV generation systems.
SIMULATION MODEL OF PV CELL
The building block of PV array is the solar cell,
which is basically an p-n junction semiconductor
junction that directly converts light energy into
electricity. The physical structure and equivalent
circuit are shown below.
EXPERIMENTAL SETUPAND SIMULATION RESULTS
MATLAB MODEL OF THE PV MODULE
The model of the PV module was implemented
using a Matlab program. The model parameters
are evaluated during execution using the equations
listed above in this paper. The program calculates
the current I, using typical electrical parameter of
the module (Isc, Voc). The characteristics for pv
module is simulated using the matlab program.