Role of voltage zero-crossing in propagation of water trees

S. Mukai, H. Suzuki, Yoshimichi Ohki, Y. Nakamichi, K. Ajiki, Y. Li

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

    1 Citation (Scopus)

    Abstract

    Water tree characteristics have been investigated for low-density polyethylene by applying power-frequency ac voltages with high-frequency components, which are simulated output voltages of a pulse-width-modulation inverter. If we compare the water-tree length among single-frequency voltages, the water tree grows faster if the frequency is higher. However, if we superpose a power-frequency voltage onto the high-frequency voltage, the tree growth is suppressed. The tree length becomes shorter if the superposed power-frequency voltage is higher. This surprising result is explainable by considering that the zero-crossing of the applied voltage plays an important role for the tree propagation. In case that the high-frequency voltage is superposed onto a dc voltage, the dc voltage seems not to have any influence to the tree growth. This result can be also explained by considering the number of voltage reversals at the tree tip.

    Original languageEnglish
    Title of host publicationConference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report
    PublisherIEEE
    Pages300-303
    Number of pages4
    Volume1
    Publication statusPublished - 1997
    EventProceedings of the 1997 Annual Conference on Electrical Insulation and Dielectric Phenomena. Part 2 (of 2) - Minneapolis, MN, USA
    Duration: 1997 Oct 191997 Oct 22

    Other

    OtherProceedings of the 1997 Annual Conference on Electrical Insulation and Dielectric Phenomena. Part 2 (of 2)
    CityMinneapolis, MN, USA
    Period97/10/1997/10/22

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    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Industrial and Manufacturing Engineering
    • Building and Construction

    Cite this

    Mukai, S., Suzuki, H., Ohki, Y., Nakamichi, Y., Ajiki, K., & Li, Y. (1997). Role of voltage zero-crossing in propagation of water trees. In Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), Annual Report (Vol. 1, pp. 300-303). IEEE.