Experimental studies on power transformer model winding provided with MOVs
| Autor: | G.R. Gurumurthy, G.H. Kusumadevi |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
Engineering
Transferred surge 020209 energy Surge voltage 02 engineering and technology Distribution transformer law.invention law Fault diagnostics 0202 electrical engineering electronic engineering information engineering Autotransformer Energy efficient transformer Transformer Delta-wye transformer Power transformer model Leakage inductance lcsh:T58.5-58.64 business.industry lcsh:Information technology Electrical engineering Mechanics MOV Rise time lcsh:Electrical engineering. Electronics. Nuclear engineering business Rotary variable differential transformer lcsh:TK1-9971 |
| Zdroj: | Journal of Electrical Systems and Information Technology, Vol 4, Iss 1, Pp 279-288 (2017) |
| ISSN: | 2314-7172 |
| DOI: | 10.1016/j.jesit.2016.08.001 |
| Popis: | Surge voltage distribution across a HV transformer winding due to appearance of very fast rise time (rise time of order 1 μs) transient voltages is highly non-uniform along the length of the winding for initial time instant of occurrence of surge. In order to achieve nearly uniform initial time instant voltage distribution along the length of the HV winding, investigations have been carried out on transformer model winding. By connecting similar type of metal oxide varistors across sections of HV transformer model winding, it is possible to improve initial time instant surge voltage distribution across length of the HV transformer winding. Transformer windings with α values 5.3, 9.5 and 19 have been analyzed. The experimental studies have been carried out using high speed oscilloscope of good accuracy. The initial time instant voltage distribution across sections of winding with MOV remains nearly uniform along length of the winding. Also results of fault diagnostics carried out with and without connection of MOVs across sections of winding are reported. |
| Databáze: | OpenAIRE |
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