PHOTOVOLTAIC
Equivalent Electrical Circuit of PV Cell
Circuit of solar
cell consists of current source (Ish) in parallel with a diode. As
in practical conditions no solar cell is ideal, so a shunt resistance and a
series resistance is considered in the circuit as shown in figure. RS is
the series resistance and RSH is the parallel resistance and ID
is the diode current.When terminals are short circuited, the output
voltage becomes zero and the short circuit current (Isc) becomes
equal to current source (Iph). When we open circuit the terminals
output current becomes zero and source current (Iph) becomes equal
to diode current (Id).
cell consists of current source (Ish) in parallel with a diode. As
in practical conditions no solar cell is ideal, so a shunt resistance and a
series resistance is considered in the circuit as shown in figure. RS is
the series resistance and RSH is the parallel resistance and ID
is the diode current.When terminals are short circuited, the output
voltage becomes zero and the short circuit current (Isc) becomes
equal to current source (Iph). When we open circuit the terminals
output current becomes zero and source current (Iph) becomes equal
to diode current (Id).
I =
Iph – Io(
1) = Iph – Id
Iph – Io(
1) = Iph – Id
Iph = qA x efficiency x photon flux
Voc
=
(
1)
=
(
1)
T = operating
temperature (kelvin),
temperature (kelvin),
Io =
reverse saturation current of diode,
