LAPSE:2023.6766
Published Article
LAPSE:2023.6766
Review on Gassing Tendency of Different Insulating Fluids towards Transformer Applications
February 24, 2023
This paper reports the critical reviews on the gassing tendency of different insulating fluids along with the precautionary measures to be considered during their fault diagnosis in transformer insulation. The experimental techniques and procedures for identifying the gassing due to electrical and thermal stress along with the stray gassing phenomenon has been elucidated. The different interpretation schemes used for determining the faults in transformers results in unexpected errors when the historical data relating to mineral oil is used for the other alternative fluids. Mineral oil and natural ester show a positive gassing tendency compared to synthetic ester which exhibit a negative gassing tendency. The stray gases are mostly due to breakage of C-C bonds under normal operating temperature of transformer. Among the different hydrocarbons, hydrogen and ethylene are more predominantly formed under lower temperatures. The silicone oil and ester fluids are more stable even under localised hot spots simulated observing a lesser gassing compared to the mineral oil. The impact of additives along with the oxygen and water content in the insulating fluids can lead to the stray gas’s causing confusion towards the identification of actual faults occurring in transformers. Furthermore, the regeneration of insulating fluids using different adsorbents reduces the gassing tendency depending on the number of cycles used for its reclamation.
Keywords
electrical stress, ester fluid, Ethylene, gassing, Hydrogen, mineral oil, regeneration, stray gassing, thermal stress
Suggested Citation
Amalanathan AJ, Sarathi R, Zdanowski M, Vinu R, Nadolny Z. Review on Gassing Tendency of Different Insulating Fluids towards Transformer Applications. (2023). LAPSE:2023.6766
Author Affiliations
Amalanathan AJ: Department of High Voltage Engineering, Faculty of Electrical Engineering and Informatics, University of Applied Sciences, 02763 Zittau, Germany [ORCID]
Sarathi R: Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai 600036, India [ORCID]
Zdanowski M: Department of Electric Power Engineering and Renewable Energy, Faculty of Electrical Engineering, Automatic Control and Computer Science, Opole University of Technology, Prószkowska 76, 45-758 Opole, Poland [ORCID]
Vinu R: Department of Chemical Engineering, Indian Institute of Technology Madras, Chennai 600036, India [ORCID]
Nadolny Z: Department of High Voltage and Electrotechnical Materials, Faculty of Environmental Engineering and Energy, Institute of Power Engineering, Poznan University of Technology, 60-965 Poznan, Poland [ORCID]
Journal Name
Energies
Volume
16
Issue
1
First Page
488
Year
2023
Publication Date
2023-01-02
Published Version
ISSN
1996-1073
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Original Submission
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PII: en16010488, Publication Type: Review
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LAPSE:2023.6766
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doi:10.3390/en16010488
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Feb 24, 2023
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