Title :
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
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;
Conference_Titel :
Electromagnetic Field Problems and Applications (ICEF), 2012 Sixth International Conference on
Conference_Location :
Dalian, Liaoning
Print_ISBN :
978-1-4673-1333-9
DOI :
10.1109/ICEF.2012.6310377
