Comparison of HYDRAN and laboratory DGA results for electric faults in ester transformer fluids

Jie Dai, Imadullah Khan, Z. D. Wang, I. Cotton

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Due to the properties of biodegradability and high fire temperature, ester fluids are becoming potential substitutes to mineral oil for power transformers. Laboratory based DGA (Dissolved Gas Analysis) techniques and the online DGA devices have been widely used on mineral oil filled transformers to diagnose faults. It is therefore of importance to understand how these techniques and devices perform with ester fluids. In the paper high and low energy discharges were generated in mineral oil and esters and the on-line readings from HYDRAN 201R were recorded with time and compared with the laboratory DGA results. It is concluded that DGA fingerprints for electrical faults in esters are similar to those in mineral oil. However, in the present experimental configuration, a slower response of HYDRAN reading was found for esters than mineral oil due to both the higher viscosities of esters and the limited oil circulation. ©2007 IEEE.
    Original languageEnglish
    Title of host publicationAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP|Annu. Rep. Conf. Electr. Insul. Dielectr. Phenom. CEIDP
    PublisherIEEE
    Pages731-734
    Number of pages3
    DOIs
    Publication statusPublished - 2007
    Event2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Vancouver, BC
    Duration: 1 Jul 2007 → …

    Conference

    Conference2007 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
    CityVancouver, BC
    Period1/07/07 → …

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