Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic Ester
The article concerns a method of drying cellulose insulation of distribution transformers with the use of synthetic ester. This method uses the high solubility of water in the ester compared to other dielectric liquids. The method is based on the striving of the oil-paper insulation system for a sta...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/9605584/ |
| _version_ | 1818742126930821120 |
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| author | Piotr Przybylek Krzysztof Walczak Wojciech Sikorski Hanna Moscicka-Grzesiak Hubert Moranda Mateusz Cybulski |
| author_facet | Piotr Przybylek Krzysztof Walczak Wojciech Sikorski Hanna Moscicka-Grzesiak Hubert Moranda Mateusz Cybulski |
| author_sort | Piotr Przybylek |
| collection | DOAJ |
| description | The article concerns a method of drying cellulose insulation of distribution transformers with the use of synthetic ester. This method uses the high solubility of water in the ester compared to other dielectric liquids. The method is based on the striving of the oil-paper insulation system for a state of moisture equilibrium. Water migrates from the cellulose insulation of the high moisture content to the synthetic ester which is subjected to continuous drying. The research was carried out on a complex laboratory model reflecting the transformer insulation system. In this model, the drying of the ester was carried out using a molecular sieve with an appropriately selected adsorber weight. To check the drying efficiency of the cellulose insulation, the water content in the pressboard strips taken from the model, both before and after the drying process, was determined. The water content was measured using the Karl Fischer titration method. The research showed the high efficiency of the proposed method of drying. With the ester moisture in the range of 110-130 ppm and the insulation system temperature of about 70 °C, the loss of water in the samples dried for 7 days was over one percentage point. The obtained test results constitute the basis for the validation of the method on distribution transformers. |
| first_indexed | 2024-12-18T02:07:34Z |
| format | Article |
| id | doaj.art-fb779f5d8b834bc2a3ed7e3061943a71 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-18T02:07:34Z |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-fb779f5d8b834bc2a3ed7e3061943a712022-12-21T21:24:34ZengIEEEIEEE Access2169-35362021-01-01915032215032910.1109/ACCESS.2021.31258409605584Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic EsterPiotr Przybylek0https://orcid.org/0000-0002-5258-5894Krzysztof Walczak1https://orcid.org/0000-0002-0722-9495Wojciech Sikorski2https://orcid.org/0000-0002-8067-3808Hanna Moscicka-Grzesiak3Hubert Moranda4https://orcid.org/0000-0001-7961-5814Mateusz Cybulski5Institute of Electric Power Engineering, Poznań University of Technology, Poznań, PolandInstitute of Electric Power Engineering, Poznań University of Technology, Poznań, PolandInstitute of Electric Power Engineering, Poznań University of Technology, Poznań, PolandInstitute of Electric Power Engineering, Poznań University of Technology, Poznań, PolandInstitute of Electric Power Engineering, Poznań University of Technology, Poznań, PolandInstitute of Electric Power Engineering, Poznań University of Technology, Poznań, PolandThe article concerns a method of drying cellulose insulation of distribution transformers with the use of synthetic ester. This method uses the high solubility of water in the ester compared to other dielectric liquids. The method is based on the striving of the oil-paper insulation system for a state of moisture equilibrium. Water migrates from the cellulose insulation of the high moisture content to the synthetic ester which is subjected to continuous drying. The research was carried out on a complex laboratory model reflecting the transformer insulation system. In this model, the drying of the ester was carried out using a molecular sieve with an appropriately selected adsorber weight. To check the drying efficiency of the cellulose insulation, the water content in the pressboard strips taken from the model, both before and after the drying process, was determined. The water content was measured using the Karl Fischer titration method. The research showed the high efficiency of the proposed method of drying. With the ester moisture in the range of 110-130 ppm and the insulation system temperature of about 70 °C, the loss of water in the samples dried for 7 days was over one percentage point. The obtained test results constitute the basis for the validation of the method on distribution transformers.https://ieeexplore.ieee.org/document/9605584/Power transformersinsulationmoisturedielectric liquids |
| spellingShingle | Piotr Przybylek Krzysztof Walczak Wojciech Sikorski Hanna Moscicka-Grzesiak Hubert Moranda Mateusz Cybulski Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic Ester IEEE Access Power transformers insulation moisture dielectric liquids |
| title | Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic Ester |
| title_full | Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic Ester |
| title_fullStr | Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic Ester |
| title_full_unstemmed | Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic Ester |
| title_short | Experimental Validation of a Method of Drying Cellulose Insulation in Distribution Transformers Using Circulating Synthetic Ester |
| title_sort | experimental validation of a method of drying cellulose insulation in distribution transformers using circulating synthetic ester |
| topic | Power transformers insulation moisture dielectric liquids |
| url | https://ieeexplore.ieee.org/document/9605584/ |
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