Analysis of a 66kV Transformer Insulation Breakdown Accident

Abstract:

The total reflection of the wave will occur twice and the lightning over-voltage will be increased by 2 times when the lightning wave along the line reached in the disconnect switch are derived through the analysis of the accident 66kV transformer insulation breakdown. This will lead to the switch breakdown and discharge to be grounded. In this case the breaker is between the arrester and the transformer and the transformer will withstand 2 times arrester residual voltage result in the transformer breakdown. Finally, effective preventive measures combined with the practical experience are proposed.

• Periodical: Applied Mechanics and Materials (Volume 310)
• Pages: 391-394
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.310.391
• Online since: February 2013
• Authors: Hua Zhang, Qing Hao Wang, Ping Li, Zhi Xuan Li, Ning Zhang, Chuan Bo Liu, Xiao Yu Cui
• Keywords: Line Arrester, Standby Switch, Station Transformer, Wave Reflection

References

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