COMPEL - The international journal for computation and mathematics in electrical and electronic engineering: Volume 23 Issue 2

Improved EDMC for the processes with high variations and/or sign changes in steady‐state gain

Mohammad Haeri

EDMC represents extended dynamic matrix control, which can be applied to nonlinear process control. In this method, control inputs are determined based on a linear model that…

Analysis of non‐stationary signals in power systems

Zbigniew Leonowicz

Classical techniques to estimate the spectrum of the multi‐component signal are based on Fourier‐based transformations. The frequency estimates obtained from their spectral peaks…

Detecting transient voltage stability and voltage sag

Francisco Jurado, José Ramón Saenz

This paper presents method to discriminate between transient voltage stability and voltage sag. The discrete wavelet transform (WT) is a powerful tool in the analysis of the…

Charge transport in 1D silicon devices via Monte Carlo simulation and Boltzmann‐Poisson solver

A. Majorana, O. Muscato, C. Milazzo

Time‐depending solutions to the Boltzmann‐Poisson system in one spatial dimension and three‐dimensional velocity space are obtained by using a recent finite difference numerical…

HEMT noise neural model based on bias conditions

Vera Marković, Zlatica Marinković

Knowledge of the microwave transistor parameters at various bias conditions is often required in computer‐aided design of complex microwave low‐noise circuit. Since the…

The fuzzy decision tree application to a power system problem

K.L. Lo, Haji Izham Haji Zainal Abidin

This paper describes voltage collapse in power system networks and how it could lead to a collapse of the whole system. Discusses the effect of machine learning and artificial…

All‐pole equiripple approximations to arbitrary functions of frequency

L. Unsworth

The problem of determining a rational function whose magnitude characteristic approximates some arbitrary functions of frequency in an equiripple sense is discussed. A novel…

Risk analysis approach for generation adequacy assessment in a deregulated environment

K.L. Lo, A.H. Hashim

A system operator (SO) of a transmission network consistently aims to minimise operating costs whilst still maintaining a certain degree of system adequacy. One of the ways to…

Analytical modelling of an induction motor fed by a four‐switch PWM VSI

Jiri Klima

This paper presents analytical and experimental results that quantify the performance of an induction motor fed by a space‐vector pulse width modulated four‐switch (B4) voltage…

Utilizing design sensitivity analysis for 3D optimization of transformer tank shields considering eddy currents

Yingying Yao, Chang Seop Koh, Jae Seop Ryu, Dexin Xie, Tae Gun Um

A novel 3D shape optimization algorithm is presented for electromagnetic devices carrying eddy current. The algorithm integrates the 3D finite element performance analysis and the…

Magnetization identification problem: Illustration of an effective approach

Olivier Chadebec, Jean‐Louis Coulomb, Gilles Cauffet, Jean‐Paul Bongiraud, Sébastien Guérin

This paper deals with the problem of magnetization identification. We consider a ferromagnetic body placed in an inductor field. The goal of this work is, from static magnetic…

A survey of parallel solvers for the finite element method in computational electromagnetics

B. Butrylo, F. Musy, L. Nicolas, R. Perrussel, R. Scorretti, C. Vollaire

This paper presents new trends in parallel methods used to solve finite element matrix systems: standard iterative and direct solving methods first, and then domain decomposition…

Model reduction of nonlinear systems

Marissa Condon, Rossen Ivanov

This paper presents the application in circuit simulation of a method for model reduction of nonlinear systems that has recently been developed for chemical systems. The technique…

Electromagnetic model of turn‐to‐turn short circuits in transformers

Guzmán Díaz González, Javier Gómez‐Aleixandre Fernández, Pablo Arboleya Arboleya

In the past years, there has been an increasing concern about turn‐to‐turn faults in power transformers, due to the high costs that unexpected outages cause. It is not always…

Capacitances and singularities of the unit triangle, square, tetrahedron and cube

F.H. Read

The boundary element method has been used to obtain the electrical capacitances of the unit equilateral triangle, square, regular tetrahedron and cube. For each of these objects…

A hybrid method for determining the reluctivity tensor components of Goss textured ferromagnetic materials

Hans Vande Sande, François Henrotte, Kay Hameyer, Ludo Froyen

For anisotropic materials, the magnetic field vector H→ and the flux density vector B→ are parallel with each other only along a few distinct directions. When performing…