M. Tartaglia - Academia.edu (original) (raw)

Papers by M. Tartaglia

IEEE Transactions on Magnetics, 1993

A procedure for the analysis of multiconductor busbar systems under steady-state AC conditions is... more A procedure for the analysis of multiconductor busbar systems under steady-state AC conditions is presented. The method is based on a lumped parameter approach under the hypothesis of magnetic linearity. The model involves a matrix of self and mutual impedances deduced from electromagnetic field solutions including eddy current effects. The matrix, inserted into circuit equations, leads to current sharing evaluation

IEEE Transactions on Magnetics, 1986

A CAD PROCEDURE OF A CYLINDRICAL-FACED ELECTROMAGNET FUR TYPEWRITER5 P. Belforte (l) , G. Bobho (... more A CAD PROCEDURE OF A CYLINDRICAL-FACED ELECTROMAGNET FUR TYPEWRITER5 P. Belforte (l) , G. Bobho (2) , M, Chlampl (3) , M. T a r t a g h a (4) (1) Centro Stud1 SUI Slstemx, T o n n o (Italy) (2) o h v e t t i , ~s v~s z s n e scrivere, Ivwea (r t a l y) (3) Istituto Elettratecnlco Nazzonale G a l r h o Ferrarls, T o n n o (Italy) (4) Politecnico d l Torino, Dlpartirnento d i Elettrotecnica, Torino (I t a l y

IEEE Transactions on Magnetics, 1981

Previously, a successive approximations procedure was developed to compute by means of the f f i ... more Previously, a successive approximations procedure was developed to compute by means of the f f i t e element method the magnetic field in nonhomogeneous nonlinear media. This method is now extended to multiply connected domains with boundary conditions well suited to the study of power transformer cores. Essential features of the present approach are a consistent use of integral constraints in the variational formulation of the problem and a full exploitation of the space and time symmetries involved. Some numerical results for twwiimensional problems are discussed in the last sections.

European Transactions on Electrical Power, 2007

This paper investigates rhe multiconductor busbar behaviour under A C conditions with the aim of ... more This paper investigates rhe multiconductor busbar behaviour under A C conditions with the aim of comparing the predictions of traditional circuit models with a more accurate analysis based on the electromagnetic field computation. This analysis employs a two-dimensional finite-element technique including eddy-current effects. In linear systems this approach leads to a circuit model described by an impedance matrix, while, in presence of saturable media, field and circuit equations are simultaneously solved by a voltage-driven field formulation. The paper analyses the behaviour of two different busbar systems when a short-circuit currentflows through them; the results obtained by the proposed approach are compared with those deduced according to the methods suggested by the IEC Standards and by the symmetrical components.

International Journal of Modelling and Simulation, 1990

In the present paper d.c. contactnrs without ~conomy apparatus re a ndlyzed. Suc h devices requir... more In the present paper d.c. contactnrs without ~conomy apparatus re a ndlyzed. Suc h devices require a careful des ign of pole s hap e and an accur<.tte prediction of the dynamical behaviour 111

WORKSHOP on “PROTECTION IN COMPLEX AND DISTRIBUTED SYSTEMS INCLUDING RAILWAYS”, June 3-5, 2002 Budapest, Hungary, 2002

The aim of this work is to give a contribution to the methods for reducing the magnetic field gen... more The aim of this work is to give a contribution to the methods for reducing the magnetic field generated by power lines by a suitable disposal of conductors and their metallic sheath. The particular cases of cables and gas insulated lines (GIL) are examined because they are considered an important tool to reduce electromagnetic pollution at extremely low frequencies in power applications. The presented results improve the ones proposed mainly in [2-6] and they are based on a simple computation of magnetic field in linear media including the effects of conductor disposition on the power line behavior. In particular the power line is modeled as in [6] by means of an impedance matrix whose coefficients are computed according to traditional well known reference books like [7]. The general results on conductor disposition for 3-phase lines are easily obtained and new interesting results are obtained when using an asymmetrical phase-split disposition useful when an half space must have lower field levels than the remaining one; a parametric analysis of lines having each conductor equipped with a sheath usually for mechanical protection or to get or radial electrical field or to contain gas. In the most complex cases the results predicted by the simplified analysis are satisfactorily confirmed by the ones obtained by means of the more accurate finite element analysis mainly because the main interest is devoted to the far from sources magnetic field

2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS), 2019

The resonant grounding is one of the possible methods of system neutral grounding for the medium-... more The resonant grounding is one of the possible methods of system neutral grounding for the medium-voltage distribution. IEEE standards do define this grounding configuration, but important advantages and drawbacks of the resonant grounding might not be fully known, due to its rather uncommon application in North America. On the other hand, resonant grounding in Europe is imposed by the increased requirements for power quality, especially for medium-voltage industrial users, and imposed to electric utilities by Regulatory Authorities, with the purpose to protect the interests of users and consumers. Level of the continuity of the service, magnitude and phase of ground-fault currents, magnitude of touch voltages, all depend on how the neutral is connected to ground. In this paper, the authors will discuss electrical safety features of the resonant ground, and analyze issues when a substation, originally operated with different methods of system neutral grounding, is reconfigured with a resonant ground.

IEEE Transactions on Power Delivery, 2009

18th International Conference and Exhibition on Electricity Distribution (CIRED 2005), 2005

IECON Proceedings (Industrial Electronics Conference), 2007

... electronic equipment to disturbances. Fabio Freschi, Michele Pastorelli and Michele Tartaglia... more ... electronic equipment to disturbances. Fabio Freschi, Michele Pastorelli and Michele Tartaglia Dipartimento Ingegneria Elettrica Politecnico di Torino corso Duca degli Abruzzi 24 10129 Torino (Italy) Fig. 1 - TN Island Grounding ...

2007 IEEE Industry Applications Annual Meeting, 2007

Quand le choix est douloureux : un modèle de coût d'opportunité psychologique Résumé Ce papier es... more Quand le choix est douloureux : un modèle de coût d'opportunité psychologique Résumé Ce papier est une contribution à la théorie du regret, que nous généralisons de deux façons. Etant donné que le sentiment de regret dépend de l'information que le décideur a sur le résultat des choix qu'il n'a pas adoptés, nous proposons un modèle qui englobe toutes les situations informationnelles. Nous montrons aussi que le point de référence dans la fonction d'utilité de Quiggin (1994) ne correspond pas toujours à un sentiment de regret mais à un concept plus large que nous appelons « coût d'opportunité psychologique » ; le regret n'étant qu'une des expressions de ce concept. Le modèle prédit des déviations de comportement par rapport au modèle classique de l'espérance d'utilité. Nous mettons en évidence un goût pour la corrélation positive, une plus grande réticence à prendre du risque, ainsi que des effets négatifs de l'information sur le bien-être du décideur. Notre modèle offre aussi un cadre théorique au phénomène d'inertie face à la décision (inaction inertia) mis en évidence dans les études empiriques.

$Research paper thumbnail of An Analytical Evaluation of the Prospective <formula formulatype="inline"><tex Notation="TeX">${\rm I}^{2}{\rm t}$</tex></formula> to Assess Short-Circuit Capabilities of Cables and Busways$

IEEE Transactions on Power Delivery, 2010

ABSTRACT At the occurrence of three-phase or single-phase faults, abnormal levels of thermal ener... more ABSTRACT At the occurrence of three-phase or single-phase faults, abnormal levels of thermal energy are developed during the time taken by protective devices to clear them. By conservatively assuming an adiabatic process, all of the thermal let-through energy I2t, also referred to as Joule Integral, is accumulated within the components involved in short circuits; therefore, the temperature of their conductive materials is elevated. The thermal energy is proportional to the square of the short-circuit current. Evaluating the prospective I2t is, therefore, crucial in order to assess the short-circuit capability of cables and busways to withstand the thermal stress without failing or triggering fires in neighboring materials. In this paper, in the general case of resistive-inductive circuits, methods to evaluate the Joule Integral and to perform the assessment will be provided. The differences for power frequencies of 50 and 60 Hz are also shown.

IEEE Transactions on Magnetics, 2007

We have applied a multiobjective combinatorial optimization (MOCO) based on a vector immune syste... more We have applied a multiobjective combinatorial optimization (MOCO) based on a vector immune system (VIS) algorithm to determine the optimal sequence of parallel cables in a multiconductor three-phase system. We build the objective function in a way that minimizes the magnetic stray field and the current unbalance of a bunch of rectilinear power cables. Our principal aim is to extend and verify the ability of the VIS algorithm to solve combinatorial problems represented by nonlinear objectives that are not usually solved in MOCO problems.

IEEE Transactions on Magnetics, 1989

The paper deals with the analysis of a permanent magnet dot matrix printer head. A modelling appr... more The paper deals with the analysis of a permanent magnet dot matrix printer head. A modelling approach combining the use of a reluctance network with the finite element method is proposed. This model allows to estimate the effects of the interaction among different windings (cross-talking) acting on different needles and to predict the operating performances. Some experimental results confirm the utility of the proposed approach.

IEEE Transactions on Magnetics, 1985

The design of shaded pole electromagnets is performed using a suitable finite element procedure w... more The design of shaded pole electromagnets is performed using a suitable finite element procedure which computes nonlinear magnetic fields from the knowl edge of the a.c. supply voltages. The proposed method gives the currents and the electromotive forces in the windings, the mechanical force on the movable core and the magnetic field distributions. The effects of the pole geometry and of the shading rings conductance are analyzed, in order to improve electromagnet performances. The experimental verifications validate the numerical results.