Tap-changer diagnostics: Present state and new developments

Autor:	Jos Wetzer
Jazyk:	angličtina
Rok vydání:	2019
Předmět:	diagnosis dynamic resistance measurement power transformer tap-changer
Zdroj:	Transformers Magazine Volume 6 Issue 1
ISSN:	1849-3319
Popis:	The primary function of power transformers is to transform voltage levels for transmission and distribution. Often, transformers are equipped with a device to adjust the voltage ratio by changing the turns ratio: the tap-changer. About 30% of all European substation transformer failures are attributed to tap-changer failure, as well as about 22% of the failures in which a fire or explosion has occurred. Although the contribution of tap-changer failures has decreased over the years, it justifies appropriate measures to timely identify tap-changer defects and mitigate failure risks. In this paper, we present an overview of tap-changer diagnostic options, and discuss recent developments, in particular concerning improved techniques for dynamic resistance measurement.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=od_______951::9a805d8d8a66b0d093402491171df32d https://hrcak.srce.hr/218736 Zobrazit plný text záznamu