Calculation of Shielding Failure Rates for Transmission Lines in Complex Mountainous Areas

Author

Li, Lin ; Wang, Ping ; Hao, Junqi

Author_Institution

State Key Lab. of Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China

fYear

2012

fDate

19-21 June 2012

Firstpage

1

Lastpage

4

Abstract

Due to the complex hypsography the lightning failure rates of transmission lines in mountainous areas are higher than those in plain areas, and the lightning performance evaluation of transmission lines in mountainous areas is also more complex. In this paper, based on the regular statistical method and the classical electric geometry model (EGM), an improved electric geometry model is proposed which includes the effects of the wind deflection, the ground obliquity and the mutual shielding between the phase wires in order to evaluate the lightning performance of transmission lines in entirety. Taking a 220kV transmission line as an example, the calculated results of lightning failure rates are compared with the operation data and the proposed calculation method is verified.

Keywords

lighting; power transmission lines; shielding; statistical analysis; complex mountainous areas; electric geometry model; ground obliquity; hypsography; lightning failure; mutual shielding; phase wires; shielding failure rates calculation; statistical method; transmission lines; voltage 220 kV; wind deflection; Insulators; Lightning; Poles and towers; Power transmission lines; Wind speed; Wires;

fLanguage

English

Publisher

ieee

Conference_Titel

Electromagnetic Field Problems and Applications (ICEF), 2012 Sixth International Conference on

Conference_Location

Dalian, Liaoning

Print_ISBN

978-1-4673-1333-9

Type

conf

DOI

10.1109/ICEF.2012.6310377

Filename

6310377