Differential Protection of Power Transformer using Wavelet Transform
Mudita Banerjee1, Anita Khosla2
1Mudita Banerjee, Electrical and Electronics Department, Manav Rachna International Institute of Research and Studies, Faridabad, India.
2Dr. Anita Khosla, Electrical and Electronics Department, Manav Rachna International Institute of Research and Studies, Faridabad, India.
Manuscript received on 20 August 2019. | Revised Manuscript received on 25 August 2019. | Manuscript published on 30 September 2019. | PP: 7627-7630 | Volume-8 Issue-3 September 2019 | Retrieval Number: C6181098319/2019©BEIESP | DOI: 10.35940/ijrte.C6181.098319
Open Access | Ethics and Policies | Cite | Mendeley | Indexing and Abstracting
© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: 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.
Keywords: Differential Protection Scheme, Internal Fault Current, Magnetizing Inrush Current, Power Transformer, Wavelet Transform
Scope of the Article: Wireless Power Transmission