Assessment of lightning backflash outage rate of quadruple-circuit transmission lines due to subsequent strokes

Author

Bo Huang ; Zhengcai Fu ; Anfeng Jiang ; Guoli Wang ; Ruihai Li

Author_Institution

Key Lab. of Control of Power Transm. & Conversion, Shanghai Jiao Tong Univ., Shanghai, China

fYear

2014

fDate

11-18 Oct. 2014

Firstpage

917

Lastpage

921

Abstract

The backflash outage rate (BFOR) of typical 220/110 kV quadruple-circuit transmission lines due to direct negative lightning strokes in Guangdong power grid and the effects of common lightning protection measures are analyzed based on ATP-EMTP and the method recommended by IEEE and Chinese Standards. The results show the current front time and peak current distribution of the first and subsequent stroke have great influence on the BFOR. The tower height is more sensitive to the BFOR due to subsequent stroke. The single and double circuit BFOR significantly reduced with the reduction of tower foot resistance, and the reduction of tower foot resistance has a saturation effect for BFOR due to subsequent stroke when the resistance is below 10 Ω. The protection measures of unbalanced insulation and increased insulation are effective for BFOR due to first and subsequent stroke.

Keywords

lightning protection; power grids; power transmission lines; power transmission protection; ATP-EMTP; BFOR; Chinese Standards; Guangdong power grid; IEEE; current distribution; direct negative lightning strokes; increased insulation; lightning backflash outage rate assessment; lightning protection; quadruple-circuit transmission lines; tower foot resistance reduction; unbalanced insulation; Indexes; Lightning; Poles and towers; Resistance; backflash outage rate; lightning protection measures; negative first and subsequent stroke; quadruple-circuit transmission lines;

fLanguage

English

Publisher

ieee

Conference_Titel

Lightning Protection (ICLP), 2014 International Conference o

Conference_Location

Shanghai

Type

conf

DOI

10.1109/ICLP.2014.6973254

Filename

6973254