Lightning Protection Improvement and Economic Evaluation of Thailand’s 24 kV Distribution Line Based on Difference in Grounding Distance of Overhead Ground Wire

<div>CIGRE concave shape of lightning current waveform. If is lightning current crest. Sm is maximum rate of rise. tf is equivalent front duration. tn is time at 90% impulse amplitude or 0.9 If. tm = If/Sm, defined as the minimum equivalent front or time to crest.</div>

Mathematical Problems in Engineering

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Figure 2: Lightning Protection Improvement and Economic Evaluation of Thailand’s 24 kV Distribution Line Based on Difference in Grounding Distance of Overhead Ground Wire 

Figure 2 | Lightning Protection Improvement and Economic Evaluation of Thailand’s 24 kV Distribution Line Based on Difference in Grounding Distance of Overhead Ground Wire 