38 Mohammed Asim, M.A.Mallick, Ayaz Malik, Mohd Saaqib International Journal of Electronics, Electrical and Computational System IJEECS ISSN 2348-117X Volume 4, Special Issue February 2015 Modelling and Simulation of 5 Parameter Model of Solar Cell Mohammed Asim M.A.Mallick Ayaz Malik Mohd Saaqib Electrical dept., Integral University EEE dept., Integral University Electrical dept. Integral University M.Tech (Power System Lucknow,India Lucknow, India Lucknow, India UTU , Dehradun Abstract— This paper defines a 5-parameter based simulation model for a PV cell/array in order to allow estimate the characteristics of the cell with respect changes on environmental parameter of temperature and irradiance. Accurate PV module models are presented based on the Shockley diode equation. The general model was implemented on MATLAB and accepts irradiance and temperature as variable parameters and outputs the I-V characteristic and P-V characteristic as well. In many applications, such as solar power plants, building integrated photovoltaic or solar tents, the solar photovoltaic arrays might be illuminated non-uniformly. The cause of non- uniform illumination may be the shadow of clouds, the trees, booms, neighbour’s houses, or the shadow of one solar array on the other, etc. This further leads to nonlinearities in characteristics. The shadow of solar PV array can cause many undesired effects. So study regarding the issue becomes very important to find and suggest methods and steps to be taken to overcome this. Two solar PV modules of two cells are developed for evaluation and simulation under partial shading conditions and show excellent correspondence. Keywords—PV,5 parameter,insolation,temprature I. INTRODUCTION A solar panel cell basically is a p-n semiconductor junction. When exposed to the light, a DC current is generated. The smallest unit is a cell which when combined in a string i.e. either in series or parallel, form a module which, further, in a bigger number forms an array. The generated current varies linearly with the solar irradiance. The equivalent electrical circuit of an ideal solar cell can be treated as a current source parallel with a diode. The solar cells are connected in series and parallel to create a solar array. An estimation method used in [1] proposes that the power output of a PV system is proportional to the insolation levels measured for the surface of a solar cell at any angular position. Mathematical models [2], [3] have been used to accurately characterize the electrical solar PV arrays. II. 5 PARAMETER BASED MODEL OF A SOLAR PV CELL A solar cell model is represented by a constant current source and a diode as shown in Figure 1. The light generated current, I L , is the amount of current produced by the electron-hole pairs generated by the impinging sunlight. This phenomenon is called photovoltaic effect. IL depends on the intensity of the incident solar light [4], characteristics of the solar panel, and the ambient temperature. The most important electrical characteristics of a PV cell module/array are: Fi gure 1: Equivalent circuit representing the 5- Parameter model. (a) Short Circuit current (I SC ): Usually this is associated with the light generated current IL and is considered the same for normal levels of