Alternative Dielectric Fluids for Transformer Insulation System: Progress, Challenges, and Future Prospects

Ester-based dielectric fluids have gained widespread popularity for applications in high voltage apparatus. Synthetic and natural esters have been subjected to research for decades vis-à-vis mineral insulating oils around the world. Although many researchers favor the application of ester fluids, u...

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Bibliographic Details
Published in:IEEE access 2019, Vol.7, p.184552-184571
Main Authors: Mohan Rao, U., Fofana, Issouf, Jaya, T., Rodriguez-Celis, Esperanza Mariela, Jalbert, Jocelyn, Picher, Patrick
Format: Article
Language:English
Subjects:
Cold weather
dielectric fluids
Dielectrics
ester fluids
Esters
Fire resistance
insulating materials
Insulation
Mineral oils
Minerals
Miscibility
Oil insulation
Power transformer insulation
Prebreakdown
Tap changers
Transformer
Transformers
Utilities
Vegetable oils
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Summary:Ester-based dielectric fluids have gained widespread popularity for applications in high voltage apparatus. Synthetic and natural esters have been subjected to research for decades vis-à-vis mineral insulating oils around the world. Although many researchers favor the application of ester fluids, utilities are still uncertain and application of these alternatives remains a challenge. The intent of this survey is to present recent research progress and highlight the state of the art of key aspects that should be emphasized in future research. The contemporary research scenarios pertaining to the performance of ester fluids versus mineral oils, miscibility, and retrofilling of insulating fluids are discussed. In addition, pre-breakdown phenomena, usage of esters in on-load tap changers, environmental and fire resistance properties, and use of esters in cold climates are also discussed. Importantly, challenges and future aspects that should be investigated to improve the existing knowledge of ester dielectric fluids for applications in transformer technology are highlighted.
ISSN:2169-3536
2169-3536
DOI:10.1109/ACCESS.2019.2960020