Determination of Power Transformers Health Index Using Parameters Affecting the Transformer’s Life

Abstract

Power transformers are one of the most important parts of a power system, and they are crucial to the system's reliability and energy quality. The “health index” idea is used in this research to evaluate and classify transformers based on their conditions in order to optimize transformer upgrading and replacement decisions. And the transformer is inspected and maintained from various angles by collecting the transformer’s health factor and utilizing the number of this indicator to determine when and how often the transformer should be inspected and maintained. Finally, the health index described in this paper is utilized to review and regularly classify transformers based on their states and improve the renovation replacement method by applying the fuzzy logic method to research this coefficient precisely. The fuzzy health index used in this work has the advantage of being able to be trained using past transformer data. When the training is complete, it can be applied to other transformers, with the goal of achieving optimal functioning for transformers while considering cost and dependability. The specific results of the present article indicate that the health index criterion presented in this article has a high degree of certainty regarding the selection, arrangement, and timing of maintenance and service steps in the evaluated transformers. In addition, when comparing the proposed method to the conventional method for seven sample transformers, the system availability index of the proposed method improved by about 40%.It also had about 25% higher reliability than the conventional method for 7 sample transformers.

KEYWORDS:

• Health index (HI)
• Power transformer
• Fuzzy logic
• Traditional computing
• Reliability

DISCLOSURE STATEMENT

No potential conflict of interest was reported by the author(s).

Additional information

Notes on contributors

Sanjeevikumar Padmanaban

Sanjeevikumar Padmanaban (Member’12–Senior Member’15, IEEE) received PhD degree in electrical engineering from the University of Bologna, Bologna, Italy 2012. He was an associate professor at VIT University from 2012 to 2013. In 2013, he joined the National Institute of Technology, India, as a Faculty Member. In 2014, he was invited as a visiting researcher at the Department of Electrical Engineering, Qatar University, Doha, Qatar, funded by the Qatar National Research Foundation (Government of Qatar). He continued his research activities with the Dublin Institute of Technology, Dublin, Ireland, in 2014. Further, he served as an associate professor with the Department of Electrical and Electronics Engineering, University of Johannesburg, Johannesburg, South Africa, from 2016 to 2018. From March 2018 to February 2021, he has been a faculty member with the Department of Energy Technology, Aalborg University, Esbjerg, Denmark. Since March 2021, he has been with the CTIF Global Capsule (CGC) Laboratory, Department of Business Development and Technology, Aarhus University, Herning, Denmark. He has authored over 300 scientific papers and was the recipient of the Best Paper cum Most Excellence Research Paper Award from IET-SEISCON’13, IET-CEAT’16, IEEE-EECSI’19, IEEE-CENCON’19 and five best paper awards from ETAEERE’16 sponsored Lecture Notes in Electrical Engineering, Springer book. He is a Fellow of the Institution of Engineers, India, the Institution of Electronics and Telecommunication Engineers, India, and the Institution of Engineering and Technology, U K. He is an Editor/Associate Editor/Editorial Board for refereed journals, in particular the IEEE Systems JournaL, IEEE Transaction on Industry Applications, IEEE ACCESS, IET Power Electronics, IET Electronics Letters, and Wiley-International Transactions on Electrical Energy Systems, Subject Editorial Board Member—Energy Sources—Energies Journal, MDPI, and the Subject Editor for the IET Renewable Power Generation, IET Generation, Transmission and Distribution, and FACETS journal (Canada). Email: [email protected].

Mohsen Khalili

Mohsen Khalili received the BSc and MSc degrees in electrical power engineering from Islamic Azad University, Tehran Branch, Tehran, Iran, in 2013 and 2016, respectively. He has authored and co-authored more than 5 scientific papers in international journals and conferences. He has also published a book and co-authored two book chapters. His main research interests include: renewable energy technologies, partial shaded PV, MPPT algorithm, power quality, DVR, voltage disturbances, harmonic, power electronics and fault location. Since 06/2018, he has been serving as a reviewer for several high-quality journals. Email: [email protected]

Morteza Azimi Nasab

Morteza Azimi Nasab received his BSc and MSc degrees in electrical power engineering from Islamic Azad University, Tehran Branch, Tehran, Iran, in 2013 and 2016, respectively. He has authored and co-authored more than 25 scientific papers in international journals and conferences. He has also published a book and co-authored 10 book chapters. His main research interests include: renewable energy technologies, partial shaded PV, MPPT algorithm, power quality, DVR, voltage disturbances, harmonic, power electronics, fault location, Z-source inverter, and switching control strategy. Since 06/2018, he has been serving as a reviewer for several high-quality journals. Currently, he is a university lecturer at the University of Applied Sciences and Technology, Tehran, Iran, and working as an external researcher with the CTIF Global Capsule, Herning, Denmark.Email: [email protected].

Mohammad Zand

Mohammad Zand received the BSc and MSc and PhD degrees in electrical power engineering from Islamic Azad University, Tehran Branch, Tehran, Iran, in 2013 and 2016 and 2022, respectively. He has authored and co-authored more than 25 scientific papers in international journals and conferences. He has also published a book and co-authored 10 book chapters. His main research interests include: renewable energy technologies, partial shaded PV, MPPT algorithm, power quality, DVR, voltage disturbances, harmonic, power electronics, fault location, Z-source inverter, and switching control strategy. Since 06/2018, he has been serving as a reviewer for several high-quality journals. Currently, he is a university lecturer at the University of Applied Sciences and Technology, Tehran, Iran, and working as an external researcher with the CTIF Global Capsule, Department of Business Development and Technology, Herning 7400, Denmark. Email: [email protected].

Ahmad Ghaderi Shamim

Ahmad Ghaderi Shamim received BSc and MSc degrees in electrical power engineering from Islamic Azad University, Tehran Branch, Tehran, Iran, in 2013 and 2016, respectively. He is now pursuing PhD degree in power systems. He has authored and co-authored more than 15 scientific papers in international journals and conferences. He has also published a book and co-authored two book chapters. His main research interests include renewable energy technologies, partial shaded PV, MPPT algorithm, power quality, DVR, voltage disturbances, harmonic, power electronics, Z-source inverter, and switching control strategy. Since 06/2018, he has been serving as a reviewer for several high-quality journals. Currently, he is a university lecturer at the University of Applied Sciences and Technology, Tehran, Iran. Email: [email protected].

Baseem Khan

Baseem Khan (Member, IEEE) received BEng degree in electrical engineering from Rajiv Gandhi Technological University, Bhopal, India in 2008, and the MTech and DPhil degrees in electrical engineering from the Maulana Azad National Institute of Technology, Bhopal, India, in 2010 and 2014, respectively. He is currently working as a faculty member at Hawassa University, Ethiopia. His research interest includes power system restructuring, power system planning, smart grid technologies, meta-heuristic optimization techniques, reliability analysis of renewable energy systems, power quality analysis, and renewable energy integration.