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To establish effective countermeasures on power facilities against lightning damage, it is necessary to clarify the lightning characteristics such as current parameters at the area of interest. In order to collect lightning current parameters effectively, the authors have observed electric and magnetic field waveforms simultaneously at south Kyushu, where the lightning flash density in summer is high...
To establish effective countermeasures on power facilities against lightning damage, it is necessary to clarify the lightning characteristics such as current parameters at the area of interest. In order to collect lightning current parameters effectively, the authors have observed electric and magnetic field waveforms simultaneously at southern Kyushu, where the lightning flash density in summer is...
For the effective insulation design of a power line, accurate evaluation of the return-stroke current parameters is indispensable. A charge transfer is one of the most important parameters when the damage to a power line due to the energy of the lightning is discussed. The charge transfer associated with a lightning flash or individual strokes can be estimated by using electric field change obtained...
For the effective insulation design of a medium-voltage line, it is important to estimate flashover rate accurately. In this paper, flashover rate due to direct strokes to the line is evaluated by using peak currents obtained in southern Kyushu by the JLDN. In the evaluation, the correlation between the front duration and the peak current is taken into account as well as the low-voltage line. As the...
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