Abstract
This paper discusses a modified V-I relationship for the solar photovoltaic (PV) single diode based equivalent model. The model is derived from an equivalent circuit of the PV cell. A PV cell is used to convert the solar incident light to electrical energy. The PV module is derived from the group of series connected PV cells and PV array, or PV string is formed by connecting the group of series and parallel connected PV panels. The model proposed in this paper is applicable for both series and parallel connected PV string/array systems. Initially, the V-I characteristics are derived for a single PV cell, and finally, it is extended to the PV panel and, to string/array. The solar PV cell model is derived based on five parameters model which requires the data’s from the manufacturer’s data sheet. The derived PV model is precisely forecasting the P-V characteristics, V-I characteristics, open circuit voltage, short circuit current and maximum power point (MPP) for the various temperature and solar irradiation conditions. The model in this paper forecasts the required data for both polycrystalline silicon and monocrystalline silicon panels. This PV model is suitable for the PV system of any capacity. The proposed model is simulated using Matlab/Simulink for various PV array configurations, and finally, the derived model is examined in partial shading condition under the various environmental conditions to find the optimal configuration. The PV model proposed in this paper can achieve 99.5% accuracy in producing maximum output power as similar to manufacturers datasheet.©2020. CBIORE-IJRED. All rights reserved
Highlights
Due to the rapid growth in renewable energy sources, the PV power market is rapidly expanded, especially in distributed generation field
The PV cell equivalent circuit and I-V relations including the effects of connecting the panels in series and parallel for the PV array configurations are derived from the single diode and single solar PV cell
The developed PV model can be extended to the PV string, in which the number of cells is connected in series, and it can be extended for the PV array
Summary
Due to the rapid growth in renewable energy sources, the PV power market is rapidly expanded, especially in distributed generation field. To solve the problem of deriving the maximum power output from the PV cell, Zhou et al (2007) proposed the concept of fill factor The researchers such as Walker (2001); Premkumar et al (2019); Ahmadi et al (2018); Premkumar et al (2018a); Longatt (2005); and Nguyen & Nguyen (2015) have developed the PV model using Matlab software to find the output PV current from the voltage, cell temperature, and solar irradiation, and discussed the effect on the PV cell due to the change in operating conditions such as cell temperature, diode quality factor, series resistance, and the solar irradiation. (i) current source based PV model for simulation studies; (ii) development of V-I characteristics of the PV panel/array; (iii) enhancement of the PV model using the parameters from manufacturers datasheet; (iv) model demonstration and validation through simulation results.
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