Overvoltages caused by direct lightning strokes to a hybrid overhead line

被引：1

作者：

Moraes, Luana Batista ^{[1
]}

Piantini, Alexandre ^{[1
]}

Shigihara, Miltom ^{[1
]}

Borghetti, Alberto ^{[2
]}

Napolitano, Fabio ^{[2
]}

Nucci, Carlo Alberto ^{[2
]}

Tossani, Fabio ^{[2
]}

机构：

[1] Univ Sao Paulo, Inst Energy & Environm, Sao Paulo, Brazil

[2] Univ Bologna, Dept Elect Elect & Informat Engn, DEI, Bologna, Italy

来源：

ELECTRIC POWER SYSTEMS RESEARCH | 2024年 / 229卷

关键词：

Direct lightning strokes; Hybrid overhead lines; Lightning overvoltages; EMTP; TRANSIENTS;

D O I：

10.1016/j.epsr.2024.110152

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents an analysis of the overvoltages caused by direct lightning strokes to a hybrid overhead line with 138 kV, 13.8 kV, and 220 V circuits. The primary focus is on medium voltage line overvoltages and their dependence on key parameters, including ground impedance, soil resistivity, stroke current front time, conductor characteristics, lightning channel impedance, insulator capacitance, conductors' sags, and tower surge impedance. Using specific models for the transmission tower and high-voltage insulators, validated through laboratory tests and EMTP simulations, critical currents are determined for varying soil resistivity and impulse impedances. The analysis confirms the line robust performance against stroke-induced backflashovers.

引用

页数：10

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