EMTPbased interconnection cable lightning overvoltage affecting factors analysis

Abstract

Abstract:

Based on electromagnetic transient program(EMTP) simulation model， lightning current waveform，cable alignment，cable length，impulse grounding resistance，and the relationship of cable end load and cable lightning overvoltage was studied. The result indicated that steeper the wave front is，greater the overvoltage is. The lightning overvoltage is relatively small if cable is horizontally aligned. Lightning overvoltage is maximum if the cable length is 3000m. Cable aligned in same length will reduce lightning overvoltage. Impulse grounding resistant and soil resistant can barely affect the lightning overvoltage. Bigger the load is，greater the cable lightning overvoltage is. The cable lightning overvoltage is greater if load is capacitive or inductive.

Key words:

">">interconnection cable；lightning overvoltage；EMTP；affecting factors； simulating model">

WANG Xuxu1，ZHENG Xianlong2，GUO Jing3.

EMTPbased interconnection cable lightning overvoltage affecting factors analysis

[J]. Huadian Technology, 2017, 39(7): 20-23.

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EMTPbased interconnection cable lightning overvoltage affecting factors analysis

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