Design an Automatic Switching of Lightning Arrester to Control Both Sides of Transformer
|International Journal of Electronics and Communication Engineering|
|© 2020 by SSRG - IJECE Journal|
|Volume 7 Issue 3|
|Year of Publication : 2020|
|Authors : Sospeter Gabriel, Exaud Saul Tweve|
How to Cite?
Sospeter Gabriel, Exaud Saul Tweve, "Design an Automatic Switching of Lightning Arrester to Control Both Sides of Transformer," SSRG International Journal of Electronics and Communication Engineering, vol. 7, no. 3, pp. 22-28, 2020. Crossref, https://doi.org/10.14445/23488549/IJECE-V7I3P104
This study focuses on protecting electrical distribution line equipment against lightning strikes in the Mbeya region. The distribution line equipment of the Mbeya region has been suffered from lightning strikes. This equipment includes distribution transformers, reactors, switchgear, and line insulators. The study aimed to review the existing lightning protection system in the Mbeya region and suggest possible ways of improving them. The study was conducted in five major areas of the Mbeya Region: Mbeya town, Iyunga, Igurusi, Songwe, and Chimala. Data were collected through site visitation as well as field measurements. It was revealed that in the Mbeya region, the percentage of the transformer without lightning arrestors ranges from 12.5% to 25%. About 66.7% of distribution lines of 33kV have got no overhead ground wire for protection against lightning. Not only that but also earthing resistance at distribution transformers was unfulfilling the standards for protection against lightning strikes. The study found that almost all distribution transformers in the Mbeya region are protected by surge arrestors on the primary side, leaving the secondary side unprotected. It is recommended that the transformer must be protected from lightning strikes and traveling waves by surge arrestors on both the primary and secondary sides. The primary distribution lines should be protected with overhead ground wire since they are most likely to be stroked by direct lightning strikes. The grounding system should be improved to meet the recommended standards for the protection of the substation.
Distribution transformer, surge arresters, and lightning strikes
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