Search results for "31"
showing 10 items of 4401 documents
Hybrid Solar-RF Energy Harvesting Mechanisms for Remote Sensing Devices
2022
Recently, sensor networks effectively provide many applications in different fields. The deployment of mobile sensors, unmanned aerial vehicles is to reduce the burden of energy consumption for sensor nodes. However, saving energy in such networks is still a critical issue. This paper investigates the performance of a hybrid RF-Solar harvesting circuit for remote sensing devices. The harvesting circuit can simultaneously harvest power from solar and radio frequency (RF) sources readily available in the surrounding environment. The proposed work builds RF and solar harvester circuits to create hybrid harvesting circuits for all elements in the combined sensing networks. The stand-alone RF ha…
COMPORTAMENTO IN TRANSITORIO DI IMPIANTI DI TERRA INTERCONNESSI SOGGETTI A FULMINAZIONE ATMOSFERICA
2017
L’attività di ricerca è orientata all’analisi del comportamento in transitorio, durante una eventuale condizione di fulminazione atmosferica diretta e/o indiretta, di impianti di terra interconnessi in sistemi elettrici in media tensione (MT). Usualmente l’interconnessione è realizzata attraverso la guaina metallica dei cavi in MT o mediante l’impiego di corde di rame nudo interrate parallelamente al percorso dei cavi stessi. Tale interconnessione, impiegata durante il normale servizio elettrico per limitare l’ampiezza dell’eventuale corrente di guasto a terra, contribuisce anche a modificare la distribuzione della corrente di fulmine in caso di fulminazione diretta o indiretta dell’impiant…
Investigation of PCB-based Inductive Sensors Orientation for Corona Partial Discharge Detection
2022
This paper presents an experimental investigation of two different printed circuit board (PCB) inductive sensors, with meander and non-spiral shapes, to assess their capabilities and best orientation for corona partial discharge (PD) detection. First, simulations with the Ansys HFSS software are performed in order to evaluate the equivalent electrical circuit of the two sensors and their 2d radiation patterns. The meander sensors presented a resonant frequency of 600 MHz, while it was around 1.1 GHz for the non-spiral. The 2d radiation pattern showed that better sensitivity is achieved when the inductive sensor is oriented 90 degrees with respect to the PD source. Experimental tests showed …
On the strategies for the diffusion of EVs: Comparison between Norway and Italy
2017
The aim of this work is to estimate e-mobility trends, which are crucial for understanding the market and the infrastructure expansion over the next years and debate which are the persuasive policies to improve the diffusion. At the present time between the numerous and diverse standards and rules there are two charging types for electric vehicles: high power DC and AC charging modes. It will be stimulating to understand which technology will overcome in the following few years and if the charging mode option on a given electric vehicle (EV) affects its sales results. This paper addresses the existing e-mobility scenario in Norway and Italy, in particular evaluating: EV technical and commer…
Studi numerici per la magnetoencefalografia
2012
Macromodellamento di convertitori elettronici per impiego in ambito automotive
2009
Modello per la simulazione di scariche parziali con approccio probabilistico
2011
Design and control of an innovative electronic load for the photovoltaic module characterization
2016
The paper proposes a new electronic load setup for a fast, low-cost and standard-compliant characterization of a photovoltaic module. The approach is based on the use of a DC-DC converter, exploiting its ability to emulate a resistor. In particular, a Buck-Boost converter topology is employed. The model is implemented in the Simulink/SimPower System environment. A commercial PV Conergy E215P photovoltaic module is used in order to evaluate the performances of the proposed electronic load and to validate the proposed approach.
Stability of Microgrids: An Application of Virtual Synchronous Generator
2022
The objective of this paper is to illustrate an alternative control algorithm for power converters which have the task of introducing the energy generated by systems based on the use of renewable sources such as, photovoltaic or wind power, in to small-sized networks, microgrids. Virtual Synchronous Generator can operate both in parallel to the main network as well as in isolated and autonomous conditions (islanding-mode). The contribute of this work is to drive a consolidate approach, made in time domain, in a more flexible and less time-consuming approach based on Park transformation.