Page 117 - IJEEE-2022-Vol18-ISSUE-1
P. 117
Jasim & Jasim | 113
Fig. 1: The adopted electrical energy network
The proposed M-grid is made up of the following major The I-V behavior of the circuit model comprised of one
components: Distribution System, BESS, Solar PV and diode and two resistors is specified by the equation (1)[21].
600V Load.
?? = ?????? - ???? {exp (??+??????) - 1} - ??+?????? (1)
1) Distribution System ????h
A 120-kV grid equivalent, 25-kV feeders and ??????
transformers are used to represent the electrical grid. To link where ?????? is the photocurrent delivered by the constant
the microgrid to the distribution system, a three-phase
breaker and a 25-kV/600V transformer are needed. In the current source; ???? is the diode's reverse saturation current; ????
grid branch, a single-phase load can be activated to cause a
grid imbalance. is the series resistor that accounts for losses in cell solder
2) Solar Power Plant bonds, interconnection, junction box, and so on; ????h is the
Figure 2 depicts the equivalent circuit of a PV cell shunt resistor that accounts for current leakage through the
based on a single diode model, which can be represented as high conductivity shunts across the p-n junction; and ?? is the
a diode, current source, series resistance, and parallel
resistance. ideality factor that accounts for the diodes' deviation from
Fig. 2: Single diode based equivalent circuit of a PV cell Shockley diffusion theory. ???? is not an unknown parameter;
it is the diode's thermal voltage and is affected by the electron
charge, q, the Boltzmann constant, k, the number of cells in
series, n, and the temperature, T:
???? =n???? (2)
??
The equivalent circuit parameters must be changed to match
the behavior of the equivalent circuit of the solar cell/panel
testing findings. This adjustment can be made numerically
[22,23–28] or analytically [28–31]; based on empirically
recorded I-V curves or just on data from the manufacturers'
datasheets.
The solar plant comprises of a PV array capable of
producing 1 MW at 1000 W/m2 of solar irradiance and a cell
