Comparison of Different MPPT Algorithms with a Proposed One Using a Power Estimator for Grid Connected PV Systems

Manel Hlaili,Hfaiedh Mechergui

doi:10.1155/2016/1728398

Abstract

Photovoltaic (PV) energy is one of the most important energy sources since it is clean and inexhaustible. It is important to operate PV energy conversion systems in the maximum power point (MPP) to maximize the output energy of PV arrays. An MPPT control is necessary to extract maximum power from the PV arrays. In recent years, a large number of techniques have been proposed for tracking the maximum power point. This paper presents a comparison of different MPPT methods and proposes one which used a power estimator and also analyses their suitability for systems which experience a wide range of operating conditions. The classic analysed methods, the incremental conductance (IncCond), perturbation and observation (P&O), ripple correlation (RC) algorithms, are suitable and practical. Simulation results of a single phase NPC grid connected PV system operating with the aforementioned methods are presented to confirm effectiveness of the scheme and algorithms. Simulation results verify the correct operation of the different MPPT and the proposed algorithm.

Highlights

Renewable sources of energy are a hot topic acquiring a growing importance in the world due to its consumption and exhaustion of fossil fuel
This paper presents a comparison of Maximum Power Point Tracking (MPPT) methods with a proposed one which is the most effective on the basis of MPPT efficiency and considers their suitability for systems which experience a wide range of operating conditions
Different MPPT methods are compared based on simulations in the PSIM environment in terms of the dynamic response of the PV system and efficiency and implementation considerations

Summary

Introduction

Renewable sources of energy are a hot topic acquiring a growing importance in the world due to its consumption and exhaustion of fossil fuel. The photovoltaic (PV) power system is becoming increasingly important as the most available renewable source of energy since it is clean with little maintenance and without any noise. PV systems have problems, such as the conversion with low radiation (in general less than 17%), as well as the nonlinear characteristic that depends on irradiation and temperature in its operation which change the amount of electric power generated [1]. Since a PV array is an expensive system to build, it is necessary to exploit all of the available output power.

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