Open AccessDifferential Protection of Power Transformer using Wavelet Transform
Author(s) -
Mudita Banerjee*,
Anita Khosla
Publication year - 2019
Publication title -
international journal of recent technology and engineering
Language(s) - English
Resource type - Journals
ISSN - 2277-3878
DOI - 10.35940/ijrte.c6181.098319
Subject(s) - inrush current , wavelet transform , tripping , differential protection , circuit breaker , transformer , protective relay , current transformer , wavelet , relay , time domain , computer science , engineering , electronic engineering , control theory (sociology) , electrical engineering , voltage , power (physics) , artificial intelligence , physics , control (management) , quantum mechanics , computer vision
This paper presents wavelet transform method for the analysis of differential currents of power transformer which can act as an accurate classifier between magnetizing inrush current and internal faults to avoid the needless tripping of circuit breaker. The differential protection scheme occasionally mal – operate whenever magnetizing inrush occurs in power transformer. The aim is to reduce the rate and time duration of undesired outages of power transformer. This includes the necessities of reliability with zero mal – operation of differential relay. The result shows higher operating speed with less fault clearing time. Wavelet Transform is employed for the analysis of transient signals under various conditions, which extracts data from signals in time and frequency domain simultaneously. The simulation is done in MATLAB environment.