Abstract
Single or double diode electrical modeling of SPV module gives valuable results which will help to identify the exact behavior of SPV module under the normal operating condition. Accurate modelling of SPV module will also help to calculate internal resistances (Rs, Rsh) and parasitic of the SPV module. The main contribution of this work is the stepwise simplification of the current equation of single and double diode electrical model of SPV module. Then the single diode model of SPV module having 36 SPV cells in series is simulated in LTspice simulator. Simulated results are compared with labelled electrical parameters which shows close proximity to the labelled parameter at particular values of series and shunt resistance. This paper also presents the effect of variation in series resistance (Rs) and shunt resistance (Rsh) on the performance of the SPV module under normal operating condition. The dependency of SPV electrical parameters (Imax, Vmax, Pmax, FF, η) with the variation of series resistance (Rs) and shunt resistance (Rsh) is simulated, and the effects are discussed in details.
Highlights
In order to validate single diode modeling and SPICE simulation for above Solar Photovoltaic (SPV) module, the specified values of the ASP-12-75Wp SPV module are compared with simulation results for different combination of Rs and Rsh
The series resistance Rs of single diode model was varied in multiple of 10 from 0.0001Ω to 1Ω with all other parameters kept constant (Rsh = 1KΩ)
The ideal value of series resistance(Rs) is 0, but finite value shows the change in the slope of a curve near Voc
Summary
This uncertain variation affects current, voltage and power output generated by the SPV module [10, 11]. Manufacturers provide labelled electrical parameters (specification given on backside of SPV panel) and performance characteristic curves of SPV module for optimized power generation. This parameters are captured indoor under Standard Test Condition (STC) where G = 1000 W/m2, Tm = 250C and AM (Air Mass) = 1.5 [12]. SPV cell is modeled using a single diode model circuit equivalence [13].
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