Author : Rohit Kumar 1
Date of Publication :23rd March 2018
Abstract: A power transformer is considered as an influential part of any power system network. The lifespan and performance of transformer mainly depends upon its load parameters. All industries necessitate reduction in cost of operation and maintenance of its equipment. A lot of techniques have been studied and developed concerning incipient fault detection in oil immersed transformer and dry type transformer for accomplishing its cost effective goals. From the analysis, inter turn faults has resulted in 70-75% transformer failures. Therefore, it becomes crucial to exterminate this fault at an initial stage henceforth saving transformer from severe faults, reducing outage time and loss of capital. In this present work a physical model of 10 KVA, 6600/550 Volt transformer is simulated in a power system using MATLAB/SIMULINK software. The experiment is performed at different percentages of inter-turn fault that is 1%, 3%, 5% and 10% on the secondary side of the multi-winding transformer and the change in power factor and negative sequence component of current is tabulated for corresponding fault. The present work is found beneficial in incipient fault detection in underground mines where only air cooled or dry type transformer is present and Buchholz Relay is absent to sense any emerging fault in the transformer
Reference :
-
- Bajrachary, Koltunowicz, Meijer, Djairam, De Schutter & Smit (2009). Optimization of “Maintenance for Power System Equipment Using a Predictive Health Model”.
- Bartley P.E., William H (2003). “Analysis of Transformer Failures”. International Association of Engineering Insurers 36th Annual Conference – Stockholm
- Donals Chu,Andre Lux-“On-Line Monitoring of Power Transformers and Components:A Review of Key Parameters”.
- Mohamad Makky Member, IEEE, “Review of Transformer On-Line Condition Monitoring”.
- R. S. Bhide, M. S. S. Srinivas, A. Banerjee and R. Somakumar John- Analysis of Winding Inter-turn Fault in Transformer: A Review and Transformer Models in IEEE ICSET 2010 6-9 Dec 2010, Kandy, Sri Lanka.
- Farzad Zhalefar, M. Sanaye-Pasand Control and Intelligent Processing Center of Excellence, ECE School, University of Tehran, Iran.- “Studying effect of location and resistance of inter-turn faults on fault current in power transformers” in UPEC 2007 – 138.
- K. Ramesh and M.Sushama –“Inter-turn fault detection in power transformer” in International Conference on Science, Engineering and Management Research (ICSEMR 2014).
- Amit Kumar Mehta, R.N sharma and Sushil Chauhan-“Condition monitoring of insulation system in Power Transformer” in International journal of Computer and Electrical Engineering Vol.4 No. 2,April 2012.