Methodology for Circuit Breaker Contact Diagnosis through Dynamic Resistance Measurements and Fuzzy-Logic-Based Analysis

Ronimack T. Souza (), George R. S. Lira, Edson G. Costa, Adriano C. Oliveira and Antonio F. Leite Neto
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Ronimack T. Souza: Department of Electrical Engineering, Federal University of Campina Grande, Aprigio Veloso St., 882, Campina Grande 58429-900, Brazil
George R. S. Lira: Department of Electrical Engineering, Federal University of Campina Grande, Aprigio Veloso St., 882, Campina Grande 58429-900, Brazil
Edson G. Costa: Department of Electrical Engineering, Federal University of Campina Grande, Aprigio Veloso St., 882, Campina Grande 58429-900, Brazil
Adriano C. Oliveira: Engineering Department, Federal Rural University of the Semi-Arid, Francisco Mota St., Caraúbas 59780-000, Brazil
Antonio F. Leite Neto: Postgraduate Program in Electrical Engineering, Federal University of Campina Grande, Campina Grande 58428-830, Brazil

Energies, 2024, vol. 17, issue 8, 1-15

Abstract: This paper presents a methodology capable of measuring, processing, and extracting contact resistance parameters that enable the identification of the contact degradation level inside arc extinction chambers in medium- and high-voltage circuit breakers (CB). To determine the contact degradation level, an algorithm was developed to extract the characteristic parameters from the results of dynamic resistance measurement (DRM). To analyze the dataset parameters, this work employs the combination of different statistical tools, such as boxplots and fuzzy logic, enabling the evaluation to be conducted without the subjectivity inherent in human decision. Therefore, a more objective and reliable diagnosis could be achieved. The DRM tests were performed on two types of minimum-oil CB (MOCB), 800 A/15 kV/12.5 kA (CB-A) and 2000 A/72.5 kV/31.5 kA (CB-B and CB-C). For CB-A and CB-B, three contacts were utilized for each CB, with significant contact degradation. For CB-C, a single contact was employed without significant degradation. The DRM curves of the CB-C contact were used as the reference for evaluation of the CB-B contacts. For this purpose, a new DRM system was developed. The proposed methodology can be defined as a complement for other diagnostic techniques, serving as a non-subjective asset management tool, supporting decisions regarding equipment interventions.

Keywords: monitoring; diagnostic; circuit breakers; fuzzy logic; statistical analysis; dynamic resistance (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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