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Rodrigo P. Medeiros
Centro Multidisciplinar de Caraúbas, Universidade Federal Rural do Semi-Árido, RN
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Lucas D. Simões
Programa de Pós-Graduação em Engenharia Elétrica e de Computação, Universidade Federal do Rio Grande do Norte, RN
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Flavio B. Costa
Electrical and Computer Engineering Department, Michigan Technological University, Michigan
Keywords:
Experimental test bench, transformer differential protection, turn-to-turn faults, turn-to-ground faults, external faults, transformer energizations
Abstract
This work presents an experimental test bench for generating representative distur- bances in a transformer. The experimental configuration uses a 1 kVA three-phase transformer with accessible taps in its windings to generate turn-to-turn and turn-to-ground faults. Further- more, external faults and transformer energizations in the presence and absence of permanent faults were also generated in this experiment. The records of the evaluated events are exported from the oscilloscopes to be evaluated in an offline way in a MATLAB® environment. The performance of the conventional differential protection unit (87T) is evaluated for these real cases. The consistent results highlight the feasibility of using the experimental setup as a valuable step for validating transformer differential protection schemes.
