A Study of Lightning Phenomena on Distribution Lines Based on a Lightning-Surge Analysis Model for Direct Lightning Strokes

In order to rationalize (lie lightning protection design of distribution lines, lightning phenomena oil TEPCO's distribution lines were continuously observed. The observations were carried out with still cameras and lightning Surge monitoring sensors. The results elucidate the lightning performance of distribution lines. For example, direct lightning strokes are the major Cause of the present distribution line faults. This fact suggests that it is important to investigate observation data on direct lightning strokes. The observation data were analyzed by means of a direct lightning analysis model. The calculated waveforms were compared with the measured waveforms on distribution lilies. The probability distributions of the surge currents and voltages were calculated by the Monte Carlo method. These results provide new data oil lightning performance. (D 2009 Wiley Periodicals, Inc. Electron Comm Jpn, 91(10): 28-37, 2008, Published Online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/ecj.10164