Where, Ipv and I0 are the PV and saturation currents of module, Vt = NskT/q is the thermal voltage of the array with Ns cells connected in series, Rs = equivalent series resistance and Rp= equivalent parallel resistance of the array of Ns cells in series. The fluctuating behavior of PV output with environmental condition may degrade the power quality of inverter output which may cause to degrade the performance of utility and the consumer electrical appliances? So, to study the performance of PV grid connected system, 1kWp PV system is modeled using MATLAB/Simulink and detail study has been carried out in this work. Practical PV device is composed of several connected PV cells and the observation of the characteristics at the terminals of the PV array requires the inclusion of additional parameters to the basic equations given by Eq.1 1kWp grid connected PV system has been installed at CES/IOE to study the performance analysis of it and its effect on utility system. In Nepal, 680 kWp PV system delivering energy of 560kWh/day for water pumping and 1736kWh/day is injected to NEA grid is the first grid connection project in country. Out of 67GWp PV installed globally, 80% is of the grid connection type. Unlike off grid system, there is no need of batteries and charge controllers but the grid tied inverter should have special functioning capability such as anti-islanding, grid synchronization etc. INTRODUCTION In gird connected PV system, the output from the PV system is connected to utility grid by means of PV grid tied inverter. Index Terms- Standalone, off-grid, grid penetration, performance ratio, Maximum Power Point Tracking (MPPT), Total Harmonic Distortion (THD), power factor (Pf). Irradiance has direct relation while working temperature has inverse relation to the Ipv. The little impact has also been shown by the wind speed. The light generated current (Ipv.) is the function of solar irradiance and environmental temperature. The point at which the PV operates at highest efficiency is called the maximum power point (MPP). It’s V-I and V-P characteristic curves specify a unique operating point at which maximum possible power is delivered. The amount of power generated by a PV cell depends on the operating voltage of the PV cell array. The important result of these two effects is that the power of a PV cell decreases when light intensity decreases and/or temperature increases. Modeling of solar cell and module The short-circuit current (Isc) from a cell is nearly proportional to the illumination, while the open-circuit voltage (Voc) may drop only 10%with an 80% drop in illumination. In addition, the performance of the system is evaluated.1 Identified the possible operational problems that might arise in grid connected PV system and different strategies that can mitigate these problems are studied. To accomplish this, the mathematical modeling of 1kWp grid connected system is carried out and the power profile is estimated using historical environmental data collected over a number of years at Kathmandu. The objective of this work to study the performance analysis of grid connected solar PV system. But, the fluctuations in the PV output power with climatic conditions might lead to undesirable performance of the electric network in grid connected system. Therefore, in order to satisfy consumer load demand, grid connected PV energy systems that combine solar energy and other conventional conversion units are becoming more popular in recent years. A stand alone solar PV cannot provide a continuous supply of energy due to seasonal and periodic variations. Solar PV energy can be used mainly in standalone (off-grid) and grid connected system. However, the intermittent nature of the output power of PV systems reduces their reliability in providing continuous power to customers. Parallel to serial converter in matlab simulink free#Ltd., Kathmandu, Nepal 2 Institute of Engineering (IOE), Pulchowk Campus, NepalĪbstract- Solar PV energy is one of the most promising renewable resources that use the abundant and free energy from the sun having clean, inexhaustible and environmentfriendly cyclic operations. Performance Analysis of Grid Connected Solar PV System Using Matlab/Simulink 1ĭebendra Bahadur Raut*1 and Ajay Bhattrai2 Peaksun Engineering Solutions (PES) Pvt. Bhattrai: Performance Analysis of Grid Connected Solar PV System Using Matlab/Simulink
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