0000000000323686
AUTHOR
Domenico Musso
Urban food strategies and sustainable agri-food systems: Results of empirical analysis in Palermo
In developed economies, there is an increasing shift in food production from places of production to places of consumption. According to the economic logic of production costs, today many agri-food products are produced in one part of the continent and made available for consumption in other parts. This situation, although justified from an economic point of view, leads to the impoverishment of territories as many economic activities disappear from the production scenario. In this work, the agrifood policy of the city of Palermo is analyzed. In particular, we investigated the fruit and vegetable market in Palermo. The empirical verification shows that most of the fruit and vegetables availa…
Optimization of photovoltaic energy production through an efficient switching matrix
This work presents a preliminary study on the implementation of a new system for power output maximization of photovoltaic generators under non-homogeneous conditions. The study evaluates the performance of an efficient switching matrix and the relevant automatic reconfiguration control algorithms. The switching matrix is installed between the PV generator and the inverter, allowing a large number of possible module configurations. PV generator, switching matrix and the intelligent controller have been simulated in Simulink. The proposed reconfiguration system improved the energy extracted by the PV generator under non-uniform solar irradiation conditions. Short calculation times of the pro…
Dynamic programming and Munkres algorithm for optimal photovoltaic arrays reconfiguration
Abstract In this paper, an original formulation of the control problem for optimal PV array reconfiguration, following a Total Cross Tied layout, is proposed. The formulation follows the well-known subset sum problem, which is a special case of the knapsack problem. The reconfiguration is a measure devoted to mitigate the mismatch effect and maximize the output power of small photovoltaic plants under non-homogeneous working conditions. Therefore, reconfiguration means changing the connections of the solar panels adaptively by a dynamic switching matrix. The control system implements an easy dynamic programming algorithm to change the switches layout. The use of the Munkres assignment metho…
A Dynamic Electrical Scheme for the optimal reconfiguration of PV modules under non-homogeneous solar irradiation
This paper presents a strategy for the maximization of the output power of photovoltaic (PV) systems under non homogeneous solar irradiation by means of automatic reconfiguration of the PV arrays layout. The innovation of the proposed approach is the employment of a simple Dynamic Electrical Scheme (DES), allowing a large number of possible modules interconnection, to be installed between the PV generator and the inverter. The models of the PV generator and of the DES have been realized and simulated with Simulink (Dynamic System Simulation for MATLAB). The attained experimental results appear to be quite interesting in terms of the attainable benefit in power and thus energy terms. The lim…