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Impedance protection for power transformers
2015 68th Annual Conference for Protective Relay Engineers, 2015The distance protection principle, when applied to over-head lines and cables, is well known, widely applied and well proven. Also on large generating blocks it is often applied as one of the back-up protection functions. When it comes to typical power transformers, the conventional distance protection however has some limitations which have limited ...
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Differential Protection Enhancement for Power Transformer
2021A power transformer is protected against internal faults using a differential protection which is sensitive and a fast. However, during transformer magnetization (inrush current or over-excitation), the differential relay may operate unnecessarily.
Hamid Bentarzi, Rachid Bouderballa
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Relay Protection of Power Transformers
Transactions of the American Institute of Electrical Engineers, 1947This report of the AIEE relay subcommittee presents the results of a 3-year investigation of present and preferred practices in the relay protection of power transformers. Consideration is given to the influence of advances in the protective art and progress in the design of and methods of operating power transformers. A survey covering experience with
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Intelligent protection scheme for power transformer
2017 North American Power Symposium (NAPS), 2017This paper presents the development of a small-scale model of a single-phase transformer differential protection scheme in a laboratory environment. The developed model is realistic in nature as it closely resembles various phenomena that occur in an actual transformer.
Yogesh M. Makwana +3 more
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A new scheme for power transformer protection
2003 IEEE PES Transmission and Distribution Conference and Exposition (IEEE Cat. No.03CH37495), 2004In this paper, a new transformer protection scheme is proposed which is based on the combination of virtual 3rd harmonic restrained and sampled value differential principles. The differential protection restrained by virtual 3rd harmonic can identify asymmetric and symmetric inrush currents with semi-cycle data window and accelerate the protection ...
J.C. Yang +4 more
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Integrated digital power transformer protection
IEE Proceedings - Generation, Transmission and Distribution, 1994In the paper the hardware and software prototype realisation of the integrated digital three-phase power transformer protection for selective operation with all kinds of short circuits, ground faults and turn-to-turn faults is presented. The proposed integrated protection concept was developed on the basis of a nonlinear mathematical transformer model ...
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Advancements in Digital Protection of Power Transformers
2006 IEEE International Power and Energy Conference, 2006This paper presents a brief introduction to the emergence of differential protection of power transformers. In this paper, the techniques used in implementing the 2nd harmonic restraint, the artificial neural network (ANN) and the latest wavelet packet transform-based disturbance detection and classification are reviewed.
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An Overview of the Protection of Power Transformers
2023Nilesh Chothani +2 more
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