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Dive into the research topics where G. Adinolfi is active.

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Featured researches published by G. Adinolfi.


IEEE Transactions on Industrial Informatics | 2015

Multiobjective Optimal Design of Photovoltaic Synchronous Boost Converters Assessing Efficiency, Reliability, and Cost Savings

G. Adinolfi; Giorgio Graditi; Pierluigi Siano; Antonio Piccolo

Optimal design of switching converters for the integration and optimal exploitation of renewable energy sources (RES) represents a crucial issue often debated in the recent power electronics literature. The design problem required to carry out a multiobjective optimization characterized by simultaneous conflicting objectives, such as efficiency, reliability, and price, where the best compromise solution should be found by the decision maker among Pareto-optimal solutions. In this paper, a novel design method for distributed maximum power point tracking (DMPPT) synchronous boost converter is proposed. The method is based on nondominated sorting genetic algorithm with the aim to obtain the best synchronous rectification (SR) boost topology while considering different targets such as converter efficiency and reliability maximization, as well as converter price minimization. New weighted indices are also proposed for a more realistic characterization of the devices.


Journal of Solar Energy Engineering-transactions of The Asme | 2010

Design of dc/dc Converters for DMPPT PV Applications Based on the Concept of Energetic Efficiency

G. Adinolfi; Nicola Femia; Giovanni Petrone; Giovanni Spagnuolo; Massimo Vitelli

Distributed maximum power point tracking (DMPPT) is one of the most promising solutions to overcome the drawbacks associated with mismatching phenomena in photovoltaic (PV) applications. DMPPT is based on the adoption of a dc/dc converter dedicated to each PV module. The design of the power stage of such a converter is a challenging task because of the very high efficiency requirements and of the continuous changes of the operating point during the day, depending on the sun irradiation conditions. In this paper the guidelines for the design of dc-dc converters for DMPPT applications are presented and discussed.


international symposium on industrial electronics | 2011

Comparative analysis of Synchronous Rectification Boost and Diode Rectification Boost converter for DMPPT applications

Giorgio Graditi; G. Adinolfi; Nicola Femia; Massimo Vitelli

Photovoltaic systems performances are strongly influenced by mismatching phenomena. Such a drawback can be overcome by means of Distributed Maximum Power Point Tracking (DMPPT) which is based on the adoption of a DC-DC converter dedicated to the MPPT of each PV module. A DMPPT converter has to fulfil requirements of low complexity, high efficiency and high reliability. Many DC-DC converter topologies are available for DMPPT applications. The most widely used one is the boost converter. In this paper a comparative analysis between DMPPT Synchronous Rectification boost converter and Diode Rectification boost converter is carried out. Efficiency performance, thermal behaviour and reliability evaluation of the two converters power stages are compared by numerical and experimental data. The analysis demonstrates that the Synchronous Rectification boost converter is better for the PV system efficiency improvement and thermal requirements. The Diode Rectification boost instead is more reliable. A strategy to improve the Synchronous Rectification boost converter reliability is presented.


international conference on clean electrical power | 2011

Energy performances and reliability evaluation of an optimized DMPPT boost converter

Giorgio Graditi; G. Adinolfi

Photovoltaic systems performances are strongly influenced by many phenomena as installation site irradiance and temperature distributions, mismatches, shadows, etc. Mismatches and shadows drawbacks can be overcome by means of Distributed Maximum Power Point Tracking (DMPPT) which is based on the adoption of a DC-DC converter dedicated to the MPPT of each PV module. The identification of design criteria for the optimization of the power stage of a DMPPT converter is a challenging task because the expected goal is to figure out a DC-DC converter able to achieve a trade-off between technical and economic aspects. In this paper the guidelines for a high efficiency and reliable DMPPT boost converter design are presented also considering energetic and thermal aspects. European efficiency and Californian Energy Commission weighted efficiency are calculated. Finally an “optimum” solution reliability performances are evaluated.


conference of the industrial electronics society | 2009

Energy efficiency effective design of DC/DC converters for DMPPT PV applications

G. Adinolfi; Nicola Femia; Giovanni Petrone; Giovanni Spagnuolo; Massimo Vitelli

Distributed Maximum Power Point Tracking (DMPPT) is one of the most promising solutions to overcome the drawbacks associated to mismatching phenomena in photovoltaic applications. DMPPT is based on the adoption of a dc/dc converter dedicated to each PV module. The design of the power stage of such a converter is a challenging task because of the very high efficiency requirements and of the continuous changes of the operating point during the day. In this paper the guidelines for the design of dc-dc converters for DMPPT applications are presented and discussed.


international symposium on power electronics, electrical drives, automation and motion | 2012

Temperature influence on photovoltaic power optimizer components reliability

Giorgio Graditi; G. Adinolfi

Electronic components performances are influenced by many factors such as working conditions, load requirements, devices technologies, package types, ambient temperature, etc. In this paper a study of the temperature influence on components parameters in Distributed Maximum Power Point Tracking (DMPPT) converters is made. In photovoltaic systems a crucial task is represented by converters energetic efficiency and reliability. To this aim an important design step consists in the identification of electronic devices able to assure feasibility to the specific application in terms of voltage and current rates, thermal behaviour and ability to work without failure under stated conditions for a long period of time. An electro-thermal design method for photovoltaic power optimizer converters is presented. In addition, the reliability performances of a DMPPT Diode Rectification boost are evaluated for a temperature distribution graph typical of an installation site in the South Italy.


international renewable energy congress | 2014

Performance estimation of a thin-film photovoltaic plant based on an Artificial Neural Network model

Giorgio Graditi; Sergio Ferlito; G. Adinolfi; Giuseppe Marco Tina; Cristina Ventura

An Artificial Neural Network (ANN) approach is used to estimate power production yield by a 1 kWp experimental micro-morph silicon modules plant located at ENEA Portici Research Centre, in Italy South region. A large dataset consisting of data, measured every five minutes and acquired from 2006 to 2012, is used for the training/test of the ANN. First, AC power production evaluation is obtained from single-hidden layer Multi-Layer Perceptron (MPL) Neural Network with two inputs consisting in ambient temperature and solar global radiation. In order to improve the approximation of the AC power, the clear sky solar radiation is then added as input of the ANN. Experimental data are reported to demonstrate the feasibility and the potentiality of the adopted solutions.


international conference on clean electrical power | 2013

Grid integration of distributed energy resources: Technologies, potentials contributions and future prospects

G. Adinolfi; V. Cigolotti; Giorgio Graditi; G. Ferruzzi

In the last years, technological innovations and changing economic and regulatory environments have resulted in a great interest for Distributed Generation (DG). DG concept covers local power generation at distribution level by using renewable or non-conventional generators. Distributed Energy Resources (DER) range from CHP (combined heat and power) systems based on Stirling engines, fuel cells and microturbines, to renewables like solar photovoltaic (PV) systems, wind energy conversion systems (WECS) and small scale hydroelectric generation. The use of biofuels and application of various storage technologies are also considered part of DG. In this paper, the state of the art of DG technologies and strategies - focusing on solar PV, wind and fuel cells - are analysed, benefits and drawbacks are discussed, future R&D prospects are presented.


conference on ph.d. research in microelectronics and electronics | 2017

Design and numerical characterization of a low voltage power MOSFET in 4H-SiC for photovoltaic applications

G. De Martino; Fortunato Pezzimenti; F.G. Della Corte; G. Adinolfi; Giorgio Graditi

Higher efficiency in photovoltaic (PV) conversion calls for the use of small Maximum Power Point Trackers (MPPT) to be placed on board the PV modules. Such circuits require in turn power transistors with low energy losses, high switching speed and blocking voltages lower than 150 V. Thus, starting from a conventional 4H-SiC power MOSFET, a novel device for photovoltaic applications has been designed and numerically simulated in order to determine its on-state resistance (RON) for different device structures and bias voltages. The resulting value of RON is compared to that of a commercial Si-based MOSFET performing the same breakdown voltage.


Archive | 2016

AC Power Short-term Forecasting of a Thin-film Photovoltaic Plant Based on Artificial Neural Network Models

Giuseppe Marco Tina; Cristina Ventura; G. Adinolfi; Sergio Ferlito; Giorgio Graditi

Solar and PV forecasts for time horizons ranging from a few minutes ahead to several days ahead are generally significant for planning the operations of power plants which convert renewable energies into electricity. With the increasing penetration of photovoltaic (PV) power systems into the grid, the problems caused by the fluctuation and intermittence of PV power output are gaining interest. The power output fluctuations impact the power system’s stability. For this reason, an accurate forecast of PV production is necessary to consider PVs a reliable energy source.

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Massimo Vitelli

Seconda Università degli Studi di Napoli

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Fortunato Pezzimenti

Mediterranea University of Reggio Calabria

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