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Biodegradable esters : aspects of applicability criteria determination

MENTLÍK, V., TRNKA, P., SVOBODA, M., HORNAK, J., SOUČEK, J. Biodegradable esters : aspects of applicability criteria determination. In Proceedings of the 19th International Symposium on High Voltage Engineering (ISH 2015). Plzeň: Západočeská univerzita, 2015. s. 1-6. ISBN: 978-80-261-0476-6
Jazyk publikace: eng
Anglický název: Biodegradable esters : aspects of applicability criteria determination
Rok vydání: 2015
Místo konání: Plzeň
Název zdroje: Západočeská univerzita
Autoři: Prof. Ing. Václav Mentlík CSc. , Doc. Ing. Pavel Trnka Ph.D. , Ing. Michal Svoboda , Ing. Jaroslav Hornak , Ing. Jakub Souček ,
Abstrakt EN: Electrical insulating system of power transformers, which is not limiting for their performance in terms of power, is based on the combination of liquid and solid dielectrics. Solid part is kind of absorbing material usually cellulose based. Traditional systems commonly use as the liquid component mineral oil which has excellent electrical and physical properties. In the same time it has one significant disadvantage which is intolerance to the environment - eventual contamination. In keeping with the current trend of respecting the quality of the environment is therefore necessary to look for new electrical insulating liquids. It should be easy biodegradable and have excellent electrical and physical properties at least at the level of mineral oils. These new liquids have mostly ester character. Their properties are necessary to standardize, determine and set the mandatory levels of monitored parameters. Presented criteria are based on current standards and are verified by carried out experiments. Establishment of criteria is based on the grade of electrical insulating liquids according to relevant standards and regulations, taking into account the proper division of transformers by voltage and transmitted power. Electro insulating systems of these machines are by their nature and characteristics relevant to a given voltage levels and transmitted power. The determination of applicability requires identification of basic degradation mechanisms, especially the effect of temperature by setting criterion for temperature aging in relation to international standards. It is possible to study and compare standardized and newly evaluated parameters...
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