1,720,986 research outputs found
Analysis of upset and failures due to ESD by the FDTD-INBCs method
No full textIn this paper a finite-difference time domain (FDTD) model of an electrostatic discharge (ESD) event is developed. Analytical expressions for the field radiated during the ESD discharge phase have been determined to test the FDTD model of the strike arc. In order to take into account the electromagnetic field penetration through shielding structures, the conductive panels are efficiently modeled in the FDTD by the impedance network boundary conditions (INBCs). The FDTD-INBCs method permits avoidance of the huge amount of cells needed to model accurately the penetration in the traditional FDTD algorithm based on the utilization of the regular Yee grid. The method is applied to carry out the analysis of ESD events in some configuration
Impact of Nearby Lightnings on Wireless Power Transfer Ground Assembly
No full textDirect hits from Lighting Strikes (LS) are commonly recognized as dangerous events for open air installations, but also the much more frequent case of LS hitting nearby can cause overvoltage potentially damaging connected circuits, if not correctly protected. In this paper, adopting a hybrid formulation, we simulate the voltage induced at the terminals of a Wireless Power Transfer (WPT) ground coil by a LS hitting the ground nearby the system. The induced overvoltage has a non-negligible amplitude, depending on the distance of the hit, the tortuosity of the lighting channel, and the inclination of the coil with respect to the ground plane
Impact of Nearby Lightning Strikes on Wireless Power Transfer Ground Assembly
Full text linkDirect hits from Lightning Strikes (LS) are commonly recognized as dangerous events for open air installations, but also the much more frequent case of LS hitting nearby can cause overvoltage potentially damaging connected circuits, if not correctly protected. In this paper, adopting a hybrid formulation, we simulate the voltage induced at the terminals of a Wireless Power Transfer (WPT) ground coil by a LS hitting the ground nearby the system. The induced overvoltage has a non-negligible amplitude, depending on the distance of the hit, the tortuosity of the lightning channel, and the inclination of the coil with respect to the ground plane
Response bounds analysis for Transmission Lines characterized by uncertain parameters
No full textThis work is focused on the study of Multiconductor Transmission Lines (MTL) with uncertain parameters; i.e. the values of r, l, c and g can vary in an interval. The wavelet expansion in time domain is used in order to obtain an accurate and low cost representation of the line in terms of an algebraic system. The wavelet representation applied to the study of MTL with variation of the electrical parameters allow us to easily calculate a set of equivalent distributed generators, which represent the effects of the disturbance produced by the parameter variation. This analysis allows us to directly evaluate the response bounds related to the parameters uncertainties without performing repeated simulations (Montecarlo Method). © 2005 ACES
Optimizing Renewable Energy Community Management Through Multi-Objective Approaches
No full textMulti-objective optimization plays a significant role in optimizing the sizing and operation of Renewable Energy Communities (RECs), facilitating informed decision-making through precise Pareto curves. In this study, we extend a model to incorporate thermal loads and explore the effectiveness of the A-AUGMECON2 algorithm and the Non-Dominated Sorting Genetic Algorithm II (NSGA-II) for solving it. Through comparative analysis, we aim to assess the performance and robustness of different optimization approaches in enhancing the sustainability and efficiency of REC operation
On the Spiral Resonator Arrays Size Analysis for Misalignment Compensation in Wireless Power Transfer Systems
Full text linkIn this study the authors aim to use a metasurface as an additional component of a two-coil Wireless Power Transfer (WPT) system and to provide a robustness analysis to misalignment between the transmitter and the receiver coils. The analysis between metasurfaces of different size and their optimization performed to improve misalignment robustness is proved by numerical and easy circuital simulations with the aim of predicting the loads to be considered for the single unit-cell to properly control the WPT system and make it more tolerant to misalignment
Channel Characterization - Power Line Communications On-board Ships
No full textThis chapter provides an overview of the state of the art in channel characterization for power line communication (PLC). It sets the stage with an overview of basic power line topologies and characteristics of power line channels. The chapter discusses the channel models that fall into three main categories, namely deterministic, empirical and hybrid models, and the advantages and disadvantages of these approaches. It focuses on the low voltage (LV) PLC channel in both outdoor power distribution grids and in-home networks and dedicates to channel characterization of the medium voltage (MV) and the high voltage (HV) scenarios. The chapter discusses the characterization and modeling of multiple-input multiple-output (MIMO) PLC channels and presents the measurements and mathematical models for the noise experienced in PLC systems. It provides the main PLC channel characteristics in other scenarios, namely, the low voltage DC distribution grid scenario, the in-car scenario and the in-ship scenario
Double Slider-Modular Stator Linear Permanent Magnet Generator for Sea Wave Energy Harvesting: Experimental Validation
No full textAn important role in the energy transition is played by electrification which can can grant a cleaner and more sustainable energy transition when renewable energy sources are used. This paper proposes an innovative Linear Tubular Permanent Magnet Generator specifically designed to be used as a Wave Energy Converter. Among the various renewable sources, sea wave energy has a great potential to significantly contribute to the world's energy production, being concentrated, predictable, available, and, as for the onshore production plants, close to the users. Since wave motion is inherently oscillatory, the use of linear generators offers several advantages in terms of efficiency and reliability. The proposed linear generator is characterized by a modular stator and a double mover. The novel structure of the device grants various advantages not only during the operating time of the machine, but also during its manufacturing and maintenance. Moreover, its structure allows us to reach also some environmental benefits also during its decommissioning. A scaled prototype of the proposed device has been realized, and some preliminary experimental tests have been conducted
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