Evaluation and Performance of Different topologies of converters with Efficient MPPT in a Photovoltaic System

摘要

In this paper, we present a comparative study performance and analysis of different types of architecture and evaluating MPPT efficiency under shading effect in a photovoltaic system. In fact, we present a new alternative for improving both the performance of photovoltaic (PV) systems and the efficiency of the energy conversion by using different configuration of power converters. It provides different improvements on the electrical architecture and evaluation of shading effect . In fact, for this latter we use two configurations, the series and the parallel connection of a converter that involves a major power transfer capability. For this purpose, a comparative study between two configurations is carried out. These two topologies have some advantages. Each power converter can control the power conversion of each module individually, which results in increased overall energy conversion of the entire system. The MPPT control system in this case can react effectively to atmospheric variations and to study the effect of partial shading different values of solar radiation concerning performance of PV cells. Conventionally, MPPT controller and Boost converter are utilized for each solar panel or channel in this series and parallel architecture connection, Only one which allows the follow-up of the PV module maximum power point regardless of temperature irradiance , the connection of a boost DC-DC converter in a photovoltaic facility to the panel output could be a good practice to improve performance. This paper also demonstrates the suitability of this presented converter in photovoltaic applications. Simulated and experimental results of the proposed converter are also presented here in the different conversion configurations in order to find the best one in terms of efficiency and produced energy. The obtained results are very interesting and show the effectiveness of reconfiguration procedure for enhancing the test system performance. This paper is made for choice of the most suitable system topology for future PV system implementation for a given application.