Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/15993
Title: Lightning return stroke current from a new distributed circuit model and electromagnetic fields generated by tortuous lightning channels
Authors: CHIA KOK LIAN DARWIN @TJIA KOK LIAN
Keywords: Lightning, return stroke current, electromagnetic fields, lightning protection terminal, breakdown channel, corona sheath
Issue Date: 6-Jun-2008
Source: CHIA KOK LIAN DARWIN @TJIA KOK LIAN (2008-06-06). Lightning return stroke current from a new distributed circuit model and electromagnetic fields generated by tortuous lightning channels. ScholarBank@NUS Repository.
Abstract: In contribution to the field of lightning research, two lightning return stroke models are developed. The distributed circuit model is made up of resistive, capacitive and inductive elements which represent the lightning channel. While simulating the discharge mechanism, the lightning return stroke current at ground was produced to match recorded values, while keeping reference to the theoretical current waveshape. A study was conducted on the Semiconductor Lightning Extender, a resistive lightning protection terminal system. Results show that the peak of the return stroke current was significantly reduced, thus demonstrating efficacy of the resistive lightning protection terminal and the utility of the R-L-C circuit model in such studies. The improved formulation for the electromagnetic fields due to tortuous lightning channels allows for the determination of lightning radiated electromagnetic fields at any distance and height. The results exhibited key characteristics observed by Lin et al. from measured waveforms and the fine structure seen in actual measurements.
URI: http://scholarbank.nus.edu.sg/handle/10635/15993
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