Sensitivity Assessment of Lightning-Induced Surges in Distribution Feeders Using ATP

Abstract

This paper presents a sensitivity assessment of a 23kV distribution feeder subject of indirect lightning. The study focuses in a comparative performance analysis of different configurations poles. Four distribution lines topologies performance are assessed. ATP program was used to simulate the electromagnetic phenomena and to evaluate the transients caused by induced lightning discharges.

Optimisation of the Distribution System Reliability with Shielding and Grounding Design Under Various Soil Resistivities

“…The number of customers for each line section is shown in Table 4, and the relevant system data can be found in a study by Bretas et al (2018). In this study, the permanent fault rate () is set at 0.2, with N g being 10 lightning flashes/100km/yr and Sf being 0, according to a study by Cabral et al (2014). The wood cross-arm (b) is 1.8 m for the overhead distribution feeder, and the pole height (h) is 9 m for the unshielded feeder and 10 m for the shielded feeder.…”

“…The ground resistances for each grounding topology under different soil resistivity are calculated and tabulated in Table 2. In the case of the feeder without shielding and an ungrounded system, the grounding resistance remained consistently at 1000 Ω, irrespective of the changes in soil resistivity, which ranged from 10 Ωm to 10 kΩm (Cabral et al, 2014).…”

Optimización de la confiabilidad en redes de distribución frente a las descargas atmosféricas - Un estudio de caso

“…Varios estudios han sido publicados sobre modelado de sistemas de potencia en análisis transitorios [2], [21]. En este trabajo, los modelos y parámetros del sistema se utilizan de acuerdo con [11]- [15]. Un cable de guarda aterrado colocado como blindaje encima de los conductores de fase de alimentadores de distribución aéreos permite: i) la reducción del número de impactos directos en los conductores de fase; ii) la reducción de las sobretensiones inducidas a partir de campos electromagnéticos generados externamente por las descargas próximas a la línea; iii) la disminución de la impedancia característica del cable de guarda y su conexión a tierra; y iv) el aumento de la impedancia mutua del cable de guarda y su conexión a tierra con los conductores de fase protegidos [2].…”

“…R. J.Cabral et al: Revista de Ciencia, Tecnología e Innovación , Vol.2 N° 1 (2020),[9][10][11][12][13][14][15][16][17][18][19][20][21][22] …”