The reduce effect of lightning on transmission line
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Date
2018-09-22Author
Rugthaicharoencheep, Nattachote
Chalangsut, Aroon
นัฐโชติ รักไทยเจริญชีพ
อรุณ ชลังสุทธิ์
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Most of Metropolitan Electricity Authority (MEA) electric power system is using
overhead line. It is 94% in the system including subtransmission, distribution and low voltage
system. All of them were installed on concrete pole. At present, many public facilities have
been built such as Sky-Train. It causes more constrains for construction with concrete pole
due to lack of right of way. MEA needs to using electrical monopole plays an important role.
It’s easier than concrete pole for construction and it requires less construction area than
concrete pole. This research evaluation of The Reduce Effect of Lightning on Transmission
Line. Case lightning strike on overhead ground wire (OHGW) at pole top of electrical
monopole with suspension insulator, Focusing on three factors is pole top voltage,
critical current and back flashover rate (BFOR). ATP-EMTP software is used for
simulation. The results show that BFOR is reduced by 79% on electrical monopole
structure with suspension insulator compared with existing concrete pole. BFOR is
also reduced by 33.17% on concrete pole with external ground wire. The results
could be served as a guideline in subtransmission line design and improvement in
MEA power system.
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- Research Report [286]