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The Detection of Winding Short Circuits in Single-Phase Double-Winding Transformers

Bohdan Dmytryk1 dmytryk.bohdan [at] gmail.com
Oleksandr Ravlyk2 Ravlyk.OM [at] gmail.com
  1. Energetics and Control Systems Department, Lviv Polytechnic National University, Ukraine, Lviv, S. Bandery street 12.
  2. Energetics and Control Systems Department, Lviv Polytechnic National University, Ukraine, Lviv, S. Bandery street 12.
Abstract 

The object of this research is to offer a new method of identification of winding short circuits in power transformers of all classes. This method presents fast acting and absolute selectivity during different emergency modes. It’s based on the analysis of digital values of current and voltage in transformer’s windings with further calculations of active resistance.

Keywords 
winding short circuit
double-winding transformer
primary winding
secondary winding
simulation model
core
external short circuit
no-load mode
load
References 

[1]  O. M. Ravlyk, T. M. Gretchyn and V. Y. Ivanonkiv, “Tsyfrovyi kompleks dlia analizu roboty ta proektuvannia prystroiv releinoho zakhystu i avtomatyky” [“Digital software package for the analysis of processes and designing relay protection equipment and automation”], Visnyk Derzhavnoho universytetu “Lvivska politekhnika”: Elektroenerhetychni ta elektromekhanichni systemy – Bulletin of the Lviv Polytechnic State University: IEES, no.340, pp.96-101, 1997.