Generation, Transmission and Distribution, IEE
Modeling of a transmission tower for lightning surge analysis
作者:
Hara，T.，Yamamoto
关键词:
electric impedance；lightning；poles and towers；power overhead lines；power system transients；surges；500 kV；equivalent distributed constant line model；lightning-surge analysis；overhead power transmission lines
摘要:
Modelling of transmission towers is an essential part of the travelling-wave analysis of lightning surges in overhead power transmission lines. In this paper, an equivalent distributed constant line model of a transmission tower is developed. The model consists of three parts: main legs; bracings; and crossarms. The surge impedance of each part is expressed by the functions of their dimensions and geometry. This tower model is applied to a 500 kV transmission tower whose surge performance characteristics are measured. It is found that the tower voltage wave shapes, calculated from this model, closely agree with the measured ones. This proves that the authors' proposed tower model simulates well the surge performances of actual transmission towers
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