Search results for " sistemi"
showing 10 items of 1888 documents
A Cost-Effective Solution for Clearing High-Impedance Ground Faults in Overhead Low-Voltage Lines
2019
Downed distribution conductors in overhead distribution systems may not be a concern for equipment but greatly challenge the safety of persons, as well as the integrity of properties. Standard overcurrent protective devices may not be able to detect the magnitudes of currents resulting from high-impedance ground faults. Sophisticated relays able to detect high-impedance ground faults have been available to electric utilities. However, their implementation is rather uncommon, especially in developing countries, most likely due to their costs. In this paper, the authors formalize the problem, and propose a possible cost-effective solution for low-voltage overhead lines with neutral wire. This…
Dalle mafie tradizionali ai sistemi criminali. E’ tutta questione di metodo
2008
Assessment of the production costs curve in micro-grids: a comparative analysis
2012
In micro-grids, due to their small scale, there is commonly only one power supplier. A competitive wholesale market hardly exists so the question about how to consider market issues for small producers within micro-grids arises. On the other hand, the specific features of micro-grids where load and generated power hardly find a balance, require that customers take part to regulation issues, maybe using demand response programs. In this paper, price responsive policies and its programs are discussed to answer this question. A case study of a micro-grid with one microturbine and two photovoltaic generators in Italy is analyzed to assess the overall production cost in order to build a price re…
A Dynamic Electrical Scheme for the optimal reconfiguration of PV modules under non-homogeneous solar irradiation
2012
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…
Sistemi innovativi per la mobilità sostenibile in piccoli centri di valenza storico-culturale.
2009
Ruolo della morfologia nel processo epistemologico della città tra contesti, sistemi e iconologia
2021
Nel formulare un “punto di vista” sul tema centrale della morfologia “strutturale” dell’architettura e della città, proverò a sviluppare delle riflessioni di ordine epistemico comprese, talvolta, tra logiche analitiche semantiche e interpretazioni critico-relazionali1. Un iniziale approccio teorico costituto da quelle forme che Foucault (1969) avrebbe definito “dispositivi” e che svolgono il ruolo di operatori analitici e di principi progettuali. Attraverso tali ragionamenti cercherò di ricondurre la discussione verso l’indagine del rapporto tra logiche dell’analisi morfologica e fenomeno architettonico, tra tipologia e aspetti metodologici del progetto approdando a quelle forme di lettura …
A Multi-Objective Design Approach for the c Chart Considering Taguchi Loss Function
2014
The present paper proposes a multi-objective design approach for the c chart, considering in the optimization process of the chart parameters both the statistical and the economic objectives. In particular, the minimization of the hourly total quality related costs is the considered objective to carry out the economic goal, whereas the statistical objective is reached by the minimization the out-of-control average run length of the chart. A mixed integer non-linear constrained mathematical model is formulated to solve the treated multi-objective optimization problem, whereas the Pareto optimal frontier is described by the «-constraint method. In order to show the employment of the proposed …
Nei Luoghi del design. Azioni e interazioni
2008
Il testo raccoglie alcune riflessioni sulla definizione “Luogo” in relazione alla definizione di “Design” ambiguamente identificato con il termine “Industriale” quale connotazione imprescindibile della sua natura disciplinare. È nelle relazioni complesse tra i due termini: Luoghi e Design che si dispiegano i tre paragrafi del volume, veri filtri di lettura o “luoghi metaforici” per leggere la complessità in cui si trova ad operare oggi il design nel suo significato più ampio di progetto: Il primo filtro, che si avvale della coppia concettuale “astratto / concreto”, individua luoghi di relazioni tra strategie progettuali proprie della disciplina del design (sia legati ad artefatti comunicati…
Optimization of BESS Capacity Under a Peak Load Shaving Strategy
2018
Battery energy storage systems (BESSs) are becoming increasingly competitive in the global energy landscape, thanks to the strong cost reduction that has taken place in recent years and it is expected to continue in the next future. Among the many benefits BESSs can provide, time shifting can be exploited by electricity consumers to save on the electricity bill, charging the storage during the off-peak hours and discharging when the cost of electricity is high. This paper describes a simple procedure to optimize the BESS capacity under a peak load shaving strategy, in presence of a time-of-use (TOU) electricity rate, able to guarantee, at the same time, the flattest daily power diagram and …
DEMAND Project: A Peak Load Shaving Strategy for End-User Consumers
2018
Battery energy storage systems (BESS) are becoming increasingly widespread in modern power systems, thanks to the important benefits they can provide to the electricity grid. Indeed, BESS can be used in time shifting applications, storing energy during off-peak periods and discharging during peak times (when the cost of electricity is high). When BESS are used for peak shaving purposes, they also contribute to relieve peak demand charges, thus ensuring a saving for the consumers. This paper describes a peak load shaving strategy defined within the DEMAND project. The strategy is able to guarantee the flattest daily power diagram and the maximum benefit for the electricity consumers, reducin…