NDLI: Lightning-Induced Overvoltages Transmitted Over Distribution Transformer With MV Spark-Gap Operation

Content Provider	IEEE Xplore Digital Library
Author	Sabiha, N.A. Lehtonen, M.
Copyright Year	1986
Abstract	In Finland, distribution transformers are frequently subjected to lightning strokes. Therefore, it is worthy to study the voltage transferred to the secondary terminal of the transformer due to lightning strokes hitting the primary terminals. In order to do conduct this study, the high-frequency model of the distribution transformer is to be investigated. In this paper, an accurate and simplified high-frequency model of the distribution transformer under lightning strokes is presented. The proposed model is introduced based on two-port network theory where its parameters are calculated at two resonance frequencies experimentally measured. The model is suitable for unloaded and loaded conditions and it is experimentally verified under different balanced loads considering two different practical distribution transformers. Then, the model verification is extended to study the impact of medium-voltage spark-gap operation on the transmitted voltage. The experimental results have validated the proposed transformer model.
Sponsorship	IEEE Power Engineering Society
Starting Page	2472
Ending Page	2480
Page Count	9
File Size	478944
File Format	PDF
ISSN	08858977
Volume Number	25
Issue Number	4
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Spark gaps Power transformers Lightning Power system modeling Resonance Resonant frequency Frequency measurement Medium voltage Surge protection Electromagnetic modeling medium-voltage (MV) spark gap High-frequency transformer model lightning-induced overvoltages
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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