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Overhead distribution lines are usually subject to voltage transients during thunderstorms. Lightning flashes, whether direct or indirect, are one of the main causes of power quality disturbances on the electric grid. In this paper, a methodology to establish a correlation between the incidence point of a lightning flash, the stroke current amplitude and polarity and its effects on the electric distribution...
Overhead power distribution lines have significant power quality variations (voltage transients) during thunderstorms. Lightning strokes, whether direct or indirect, are among the main causes of such power quality disturbances. In order to assist the analysis of lightning effects on power quality indices, we present in this paper a monitoring network and an integrated database analysis, including...
This paper presents a method to model the saturation curve of power transformers and its impact to power system simulation studies. Thus, the article addresses the particularities of the proposed method (based on field measurements) compared to others found in the literature, especially the treatment of voltage signal and the residual flux. In addition, it shows a simulation study carried out in order...
This paper describes the development of a prototype of an enclosure for a fuse cutout, for distribution networks of class 15 kV and 36.2 kV. The purpose of the enclosure is to protect the fuse cutout against third party intervention and ensure that only linemen will be able to perform maneuvers and maintenance. Besides protecting the fuse cutout, the enclosure should allow the proper operation of...
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