Harmonic distortion and harmonic resonance problems have been widely concerned and
reported in railway electrification systems (RESs) due to the harmonic injection from the …

This paper presents a qualitative overview of the main developments carried out by the
Brazilian Electrical Energy Research Center and the Brazilian Power System Operator to …

While much attention was given in the literature to improve the fault ride through (FRT)
capability of a doubly-fed induction generator (DFIG)-based wind energy conversion system …

The main goal of this paper is the determination of the effect of the metal oxide varistor
(MOV) on various ferroresonance modes including fundamental resonance, subharmonic …

This paper describes two network models which allow several harmonic and
electromagnetic transient analysis, being, therefore, more flexible than conventional ones. In …

Transformers are fundamental and widely used electric components in the industrial area
and the power system. Modeling of transformers is also an essential issue. To analyze the …

In this paper a three-phase autotransformer is represented by inductance matrix for short-
circuit studies. The inductance matrix consists of winding self-inductances and …

Dois tipos de modelagens propícias para a realização da análise modal de redes elétricas
são apresentados neste trabalho: sistemas descritores (SD) e matriz Y (s). Os modelos …

In this paper, control of chaos is done in presence of ferroresonant oscillations in a voltage
transformer with nonlinear model of core losses. In order to control the chaotic oscillations …

The use of equivalents which reproduce the electrical network's behavior over a wide
frequency range (Frequency Dependent Network Equivalent) is of fundamental importance …