Resumen

DE AVILA DILLI, Murilo; MANDUCA ARAUJO DO NASCIMENTO, Helder  y  CAPARROS DA SILVA, Jadiel. Detección de rotura del conductor en el sistema de distribución mediante tensión de secuencia negative. EAC [online]. 2021, vol.42, n.3, pp. 31-44.  Epub 10-Dic-2021. ISSN 1815-5928.

This paper analyzes the efficiency of Negative Sequence Voltage (NSV) applied to the detection and distinction of the Conductor Break, compared to other voltage disturbances and switching that commonly occur in the Distribution System (DS). The methodology applied is simple and practical to be implemented in DSs. The distribution system used to extract characteristics of the voltage signals was the IEEE 34 nodes test feeder, which was modeled using the ATPTM software. Using Octave software, a white Gaussian noise was added to the three-phase signals and the method is considered immune to noise. Then, the signal was filtered through a second order Butterworth filter with cut-off frequency of 180 Hz. Posteriorly, the filtered three-phase voltages V A , V B and V C were windowed at each cycle (γ), with a sample rate of 128 samples per cycle. Then, the phasors were calculated using the Fast Fourier Transform. Finally, in order to achieve the lowest number of measuring devices implementation and thus reduce system operating costs, the distribution system was implemented in the GAMS software which, through an iterative process, provides that all system buses are observable using the minimum number of voltage meters. Analysis of the results indicates that the detection and distinction of the conductor break through the NSV occurred efficiently, distinguishing it from other system events using only two meters in the test system used in this paper, therefore, showing an efficient, robust and reliable methodology to aid in the correction of disturbances in the electrical system, providing greater reliability and quality in DS.

Palabras clave : conductor break; detection; distribution system; negative sequence voltage; event distinction.

        · resumen en Español     · texto en Español     · Español ( pdf )