COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 13 Issue 3

ADAPTIVE DIGITAL RELAYING USING LEAST MEAN SQUARES ALGORITHMS

T.I. HAWEEL

Simple algoritims are developed to track the harmonic structure of the voltages or currents in a power system. The algorithms are based on fitting the measured signal adaptively…

OPTIMIZING THE ELECTRICAL ENERGY DISTRIBUTION SYSTEMS DESIGN BY MULTIOBJECTIVE MODELS

I.J. RAMIREZ‐ROSADO, C. ALVAREZ BEL

Classic models for distribution systems design have usually considered only basic aspects such as power capacity limits, power demand requirements and the minimization of a…

ANALYTICAL MODELLING OF EDDY CURRENTS INDUCED BY A TIME‐VARYING MAGNETIC FIELD IN A CONDUCTIVE PLATE

N.J. SIAKAVELLAS

A simple model is proposed for the analytical calculation of the eddy current induced by a time‐varying magnetic field in a conductive plate. It is assumed that the current is…

DIRECT DETERMINATION OF TWO‐PERIODIC SOLUTIONS FOR NONLINEAR DYNAMIC SYSTEMS

T. SOBCZYK

This paper presents a Newton‐Raphson algorithm for determining the Fourier spectrum of two‐periodic solutions for dynamic systems described by nonlinear ordinary differential…

A NEW FINITE‐ELEMENT DISCRETIZATION TECHNIQUE FOR THE HYDRODYNAMIC FORMULATION OF ENERGY BALANCE EQUATIONS

R. VANKEMMEL, W. SCHOENMAKER, K. DE MEYER

This paper presents a new discretization technique of the hydrodynamic energy balance model based on a finite‐element formulation. The concept of heat source lumping is…

THREE‐DIMENSIONAL GRADIENT RECOVERY BY LOCAL SMOOTHING OF FINITE‐ELEMENT SOLUTIONS

D. OMERAGIĆ, P.P. SILVESTER

The gradient recovery method proposed by Zhu and Zienkiewicz for one‐dimensional problems and extended to two dimensions by Silvester and Omeragi? is generalized to…