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http://dx.doi.org/10.7471/ikeee.2012.16.1.001

Evaluation for Lifetime and Thermal Ratings for Aged Overhead Transmission Lines  

Kim, Sung-Duck (Department of Electrical, Electronic and Control Engineering, Hanbat National University)
Publication Information
Journal of IKEEE / v.16, no.1, 2012 , pp. 1-6 More about this Journal
Abstract
Thermal rating or lifetime evaluation for aged overhead transmission line becomes more important concerns with respect to keeping power delivery stable having proper capability. Both load rating and dip/clearance are essential factors to determine transmission capacity. In order to evaluate thermal rating and conductor lifetime for domestic transmission lines with double-circuit, the dip/ground clearance standards as well as the electrical equipment technical standard are examined. Conductor temperature and dip are calculated under the assumption of a contingency, and then, a method to up-rate load capacity is searched. As thermal rating and limit dip for aged conductor are properly evaluated, an improved strategy in order to guarantee the existing power system reliability is presented in this paper.
Keywords
ACSR conductor; dip and ground clearance; dynamic line rating; overhead transmission lines; thermal line rating;
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