Metodología para la medición de parámetros de sobretensiones transitorias en redes de distribución de 11.4 kV

Abstract

Given that transient overvoltage is a phenomenon that affects power systems, different methodologies to characterize this phenomenon in a practical and non-invasive way using its main features (peak value, duration and frequency of oscillation) are required. Therefore, the authors of this paper proposed an investigation project: the development of a prototype for the registration of these parameters in 11,4 kV networks using a capacitive electric field sensor, the initial stage for the research carried out for the abovementioned project was the state of the art regarding surges in medium voltage networks; then, the most important parameters of the surge that wanted to be studied and recorded were established. Afterwards, different options for the design of the electric field sensor were analyzed and, then, the detailed design, construction and testing of the prototype was carried out. This paper aims to present the methodology for measuring voltages in distribution networks 11.4 kV developed as part of the investigation previously outlined. Hence, the most important concepts and effects of the phenomenon, the methodology developed and the key findings of the investigation are presented.