Series Connected Photovoltaic Cells—Modelling and Analysis

Abstract

As solar energy costs continue to drop, the number of large-scale deployment projects increases, and the need for different analysis models for photovoltaic (PV) modules in both academia and industry rises. This paper proposes a modified equivalent-circuit model for PV modules. A PV module comprises several series-connected PV cells, to generate more electrical power, where each PV cell has an internal shunt resistance. Our proposed model simplifies the standard one-diode equivalent-circuit (SEC) model by removing the shunt resistance and including its effect on the diode part of the circuit, while retaining the original model accuracy. Our proposed equivalent circuit, called here a modified SEC (MSEC), has less number of circuit elements. All of the PV cells are assumed operating under the same ambient conditions where they share the same electric voltage and current values. To ensure the simplification did not come at a reduction in the accuracy of the SEC model, we validate our MSEC model by simulating both under the same conditions, calculate, and compare their current/voltage (I/V) characteristics. Our results validate the accuracy of our model with the difference between the two models falling below 1%. Therefore, the proposed model can be adopted as an alternative representation of the equivalent circuit for PV cells and modules.

Development of a photovoltaic panel emulator and LabVIEW‐based application platform

“…The obtained I-V and P-V curves have been given in Figure 15. It can be seen from Figure 15 that the I-V and P-V characteristics obtained using series connected PVPEMs are similar to those obtained from other studies given in the literature [8,39]. The obtained basic parameters have been given in Table 3.…”

Design and Implementation of Modified INC, Conventional INC, and Fuzzy Logic Controllers Applied to a PV System under Variable Weather Conditions

“…A photovoltaic module generates the PV power on the principle of photovoltaic effect [14]; it consists of photovoltaic cells in series and/or in parallel in order to obtain the desired electrical characteristics such as: power, short circuit current, or open circuit voltage [14]. The PV modules are connected with a DC voltage controlled by MPPT in order to track stabilized higher power [14,15]. This static behavior can be described by the following mathematical Equation (1) obtained by applying Kirchoff's law on Figure 2:…”

Comparison of Performance between Bi-facial and Mono-facial 10kW Photovoltaic Power Systems

“…Page 2 DOI: 10.31695/IJASRE.2020.33799 [5] These mono-crystalline solar cells will be connecting in series to create a complete solar panel which will be using for solar power generation as shown in standard equivalent circuit of solar cell connection figure 2. [6] According to the equivalent circuit, the equation for single sell can be written as follows,…”