Amedeo Andreotti
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View article: Multi-Objective Optimization for Lightning Protection in Distribution Networks: A Novel Approach Based on Design of Experiments
Multi-Objective Optimization for Lightning Protection in Distribution Networks: A Novel Approach Based on Design of Experiments Open
This paper focuses on the identification of a proper protection strategy against lightning effects on overhead distribution lines. Particularly, a multi-objective optimisation problem is formulated to contemporaneously take into account th…
View article: Effects of macromodeling on the simulation of transient events caused by direct lightning to overhead power lines
Effects of macromodeling on the simulation of transient events caused by direct lightning to overhead power lines Open
This paper aims at assessing the relevance of the coupling effects among the main components of overhead power lines in their lightning response, namely, tower, grounding electrodes, and shield wire(s). Mutual coupling effects are investig…
View article: Surge arrester optimal placement in distribution networks: A decision theory-based approach
Surge arrester optimal placement in distribution networks: A decision theory-based approach Open
The study introduces a novel method for optimizing surge arrester placement in the distribution line to mitigate lightning-induced overvoltages, employing a single-objective optimization algorithm. The study assesses the effectiveness of t…
View article: Asymptotic voltage restoration in islanded microgrids via an adaptive asynchronous event-triggered finite-time fault-tolerant control
Asymptotic voltage restoration in islanded microgrids via an adaptive asynchronous event-triggered finite-time fault-tolerant control Open
As the actuators of distributed generators involved in Microgrids (MGs) may experience different faults, it is highly recommended to design an appropriate secondary Fault Tolerant (FT) controller to provide resilience and robustness with r…
View article: Distributed Dynamic Event-Triggered Control for Voltage Recovery in Islanded Microgrids by Using Artificial Delays
Distributed Dynamic Event-Triggered Control for Voltage Recovery in Islanded Microgrids by Using Artificial Delays Open
This article tackles secondary voltage recovery problem in islanded microgrids with the aim of reducing communication frequency among distributed generation (DG) units, while maintaining desired performance and saving communication network…
View article: Modeling of Conductors Catenary in Power Lines: Effects on the Surge Propagation Due to Direct and Indirect Lightning
Modeling of Conductors Catenary in Power Lines: Effects on the Surge Propagation Due to Direct and Indirect Lightning Open
In this article, the effects of the variable height in overhead power lines are investigated with reference to the surges produced by direct and indirect lightning events. Simulations are carried out both by an implicit finite-difference t…
View article: Computation of Electric and Magnetic Fields Generated by Cloud-to-Cloud Lightning Channels
Computation of Electric and Magnetic Fields Generated by Cloud-to-Cloud Lightning Channels Open
The paper presents analytical formulas for computation in the time domain of electromagnetic (EM) fields generated by tortuous cloud-to-cloud (CC) lightning channels over a perfectly conducting ground. For the first time, the study was not…
View article: On the Role of Shield Wires in Mitigating Lightning-Induced Overvoltages in Overhead Lines - Part I: A Critical Review and a New Analysis
On the Role of Shield Wires in Mitigating Lightning-Induced Overvoltages in Overhead Lines - Part I: A Critical Review and a New Analysis Open
The ability of shield wires installed in overhead lines to mitigate lightning-induced overvoltages has been extensively investigated. Unfortunately, these studies came to different results, sometimes contradicting each other: some authors …
View article: On the Role of Shield Wires in Mitigating Lightning-Induced Overvoltages in Overhead Lines - Part II: Simulation Results for Practical Configurations
On the Role of Shield Wires in Mitigating Lightning-Induced Overvoltages in Overhead Lines - Part II: Simulation Results for Practical Configurations Open
In the companion Part I, the theory relevant to the role of shield wires in mitigating lightning-induced overvoltages in overhead lines has been analyzed and clarified. A more consistent meaning has been assigned to the concept of Shieldin…
View article: The impact of different corona models on FD algorithms for the solution of multiconductor transmission lines equations
The impact of different corona models on FD algorithms for the solution of multiconductor transmission lines equations Open
In this study, the implementation of different corona discharge models in a transient program for overhead multiconductor lines based on the implicit Crank‐Nicolson Finite Difference Time Domain method is presented. Among different corona …
View article: 2-D Convolutional Deep Neural Network for the Multivariate Prediction of Photovoltaic Time Series
2-D Convolutional Deep Neural Network for the Multivariate Prediction of Photovoltaic Time Series Open
Here, we propose a new deep learning scheme to solve the energy time series prediction problem. The model implementation is based on the use of Long Short-Term Memory networks and Convolutional Neural Networks. These techniques are combine…
View article: Distributed Robust Finite-Time Secondary Control for Stand-Alone Microgrids With Time-Varying Communication Delays
Distributed Robust Finite-Time Secondary Control for Stand-Alone Microgrids With Time-Varying Communication Delays Open
In this paper we consider the problem of restoring the voltage for stand-alone inverter-based Microgrids despite the effects of the time-delays arising with the information exchange among the electrical busses. To guarantee that all Distri…
View article: A Review of the Enabling Methodologies for Knowledge Discovery from Smart Grids Data
A Review of the Enabling Methodologies for Knowledge Discovery from Smart Grids Data Open
The large-scale deployment of pervasive sensors and decentralized computing in modern smart grids is expected to exponentially increase the volume of data exchanged by power system applications. In this context, the research for scalable a…
View article: Hierarchical Two-Layer Distributed Control Architecture for Voltage Regulation in Multiple Microgrids in the Presence of Time-Varying Delays
Hierarchical Two-Layer Distributed Control Architecture for Voltage Regulation in Multiple Microgrids in the Presence of Time-Varying Delays Open
The Multiple Microgrids (MMGs) concept has been identified as a promising solution for the management of large-scale power grids in order to maximize the use of widespread renewable energies sources. However, its deployment in realistic op…
View article: Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD
Analysis of Metal Oxide Varistor Arresters for Protection of Multiconductor Transmission Lines Using Unconditionally-Stable Crank–Nicolson FDTD Open
Surge arresters may represent an efficient choice for limiting lightning surge effects, significantly reducing the outage rate of power lines. The present work firstly presents an efficient numerical approach suitable for insulation coordi…
View article: ANALYTICAL SOLUTION OF THE ZERO-THICKNESS PERFECTLY-CONDUCTING CIRCULAR DISK IN THE PRESENCE OF AN AXISYMMETRIC MAGNETIC DIPOLE: A SECOND-KIND FREDHOLM INTEGRAL-EQUATION APPROACH
ANALYTICAL SOLUTION OF THE ZERO-THICKNESS PERFECTLY-CONDUCTING CIRCULAR DISK IN THE PRESENCE OF AN AXISYMMETRIC MAGNETIC DIPOLE: A SECOND-KIND FREDHOLM INTEGRAL-EQUATION APPROACH Open
The problem of radiation of a magnetic dipole axially symmetric with an infinitesimally thin perfectly conducting circular disk is solved in an exact closed form. This is done by transforming the original dual integral equation system desc…
View article: SHIELDING OF AN IMPERFECT METALLIC THIN CIRCULAR DISK: EXACT AND LOW-FREQUENCY ANALYTICAL SOLUTION
SHIELDING OF AN IMPERFECT METALLIC THIN CIRCULAR DISK: EXACT AND LOW-FREQUENCY ANALYTICAL SOLUTION Open
The problem of evaluating the shielding effectiveness of a thin metallic circular disk with finite conductivity against an axially symmetric vertical magnetic dipole is addressed. First, the thin metallic disk is modeled through an appropr…
View article: Decentralized Smart Grid Voltage Control by Synchronization of Linear Multiagent Systems in the Presence of Time-Varying Latencies
Decentralized Smart Grid Voltage Control by Synchronization of Linear Multiagent Systems in the Presence of Time-Varying Latencies Open
Modern power distribution systems require reliable, self-organizing and highly scalable voltage control systems, which should be able to promptly compensate the voltage fluctuations induced by intermittent and non-programmable generators. …
View article: A Neural Network Based Prediction System of Distributed Generation for the Management of Microgrids
A Neural Network Based Prediction System of Distributed Generation for the Management of Microgrids Open
In the modern scenario of smart-grids, the concept of virtual power plant (VPP) is undoubtedly a cornerstone for the smooth integration of renewable energy sources into existing energy systems with a high penetration level. A VPP is the ag…
View article: A Decentralized Architecture Based on Cooperative Dynamic Agents for Online Voltage Regulation in Smart Grids
A Decentralized Architecture Based on Cooperative Dynamic Agents for Online Voltage Regulation in Smart Grids Open
The large-scale integration of renewable power generators in power grids may cause complex technical issues, which could hinder their hosting capacity. In this context, the mitigation of the grid voltage fluctuations represents one of the …
View article: SHIELDING OF A PERFECTLY CONDUCTING CIRCULAR DISK: EXACT AND STATIC ANALYTICAL SOLUTION
SHIELDING OF A PERFECTLY CONDUCTING CIRCULAR DISK: EXACT AND STATIC ANALYTICAL SOLUTION Open
The problem of the shielding evaluation of an infinitesimally thin perfectly conducting circular disk against a vertical magnetic dipole is here addressed. The problem is reduced to a set of dual integral equations and solved in an exact f…
View article: On the Statistical Characterization of Lightning-Induced Voltages
On the Statistical Characterization of Lightning-Induced Voltages Open
Protection against lightning-induced voltages is a particularly critical issue, especially for smart grids, due to the presence of electronic-based equipment, as well as control and monitoring devices. Analysis of the severity of the induc…
View article: Decision Theory Criteria for the Planning of Distributed Energy Storage Systems in the Presence of Uncertainties
Decision Theory Criteria for the Planning of Distributed Energy Storage Systems in the Presence of Uncertainties Open
This paper deals with the use of distributed energy storage systems in microgrids, and proposes a planning method which accounts for the uncertainties of load and distributed generation. Objectives of the planning method are the reduction …
View article: A New Solution for the Evaluation of the Horizontal Electric Fields From Lightning in Presence of a Finitely Conducting Ground
A New Solution for the Evaluation of the Horizontal Electric Fields From Lightning in Presence of a Finitely Conducting Ground Open
In this paper, we present a new solution for the evaluation of the horizontal electric field in the presence of finitely conducting ground in the time domain. The solution is general, numerically robust, and overcomes the problems related …
View article: On the Kernel of the Cooray–Rubinstein Formula in the Time Domain
On the Kernel of the Cooray–Rubinstein Formula in the Time Domain Open
The kernel of the Cooray-Rubinstein formula in the time domain involves a modified Bessel function of order zero. In this letter, approximations of the kernel are proposed, which do not use any special function, and, hence, are able to sim…