Open AccessAnalysis of the mechanism of thermal collapse of MOA valve plates caused by multiple lightning strikes
Author(s) -
Jinming Yang,
Yi Ma,
Yutang Ma,
Hao Pan,
Hong Du
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2005/1/012152
Subject(s) - lightning strike , lightning (connector) , thermal , mechanism (biology) , lightning arrester , geology , materials science , power (physics) , structural engineering , electrical engineering , meteorology , engineering , physics , thermodynamics , quantum mechanics
Multiple lightning strikes are a common phenomenon in nature, and their impact on the power system cannot be ignored. MOA is an important device for lightning protection in power systems, but under certain conditions multiple lightning strikes can cause thermal collapse of MOA. In order to study the mechanism of the thermal collapse of MOA valve plates caused by multiple lightning strikes, a microscopic model of zinc oxide crystals was established, the heat transfer performance of zinc oxide crystals was simulated, and the temperature field when the size of zinc oxide crystals and the area of the grain boundary layer was different were compared. In this paper, the mechanism for the thermal collapse of the MOA valve due to thermal stress was analyzed, and the reason why multiple lightning strikes are more likely to cause MOA energy overload than a single lightning strike was explained. This research provides reference for the selection and maintenance of MOA.