The Analysis of Power Transformer Population Working in Different Operating Conditions with the Use of Health Index

Patryk Bohatyrewicz and Andrzej Mrozik
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Patryk Bohatyrewicz: Department of High Voltage and Power Engineering, Faculty of Electrical Engineering, West Pomeranian University of Technology, 70-313 Szczecin, Poland
Andrzej Mrozik: Department of High Voltage and Power Engineering, Faculty of Electrical Engineering, West Pomeranian University of Technology, 70-313 Szczecin, Poland

Energies, 2021, vol. 14, issue 16, 1-14

Abstract: The management of the power transformer population is a complex process, as the grid companies operate thousands of devices. For this issue, the health index method can be applied to facilitate asset management. The algorithm can be used not only in the technical assessment of the individual units, but also to determine the relationships within the whole population. In this paper, the presented health index method consists of periodic oil diagnostics, including the physicochemical properties, dissolved gas analysis, and furfural content, and further assessment in terms of the criticality of the device to determine the technical condition. The algorithm was specifically designed to reflect even the smallest changes of the input parameters in the final score. The performance of the health index was tested on 620 oil analyses from 220 transformers divided into four subpopulations based on the service conditions. The results have proven to be largely dependent on the criticality level and the operating conditions of the device. The analysis of the study group has shown the influence of corrective maintenance on the mean value of the health index score.

Keywords: power transformer; health index; condition assessment; population management (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

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