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Author: search.filters.author.Boonsaner, NutthaphanSubject: search.filters.subject.polarization and depolarization current

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    Analysis of electrical insulation paper by Simulation for analyze Polarization and Depolarization current testing method
    (2023-01-01)
    Rakkaphan, Chananut
    ;
    Boonsaner, Nutthaphan
    ;
    Pattanadech, Norasage
    ;
    Chancharoensook, Phop
    This paper presents the quality analysis of insulation paper in distribution transformer oil in Thailand. The country locates in tropical zone and therefore experiences relatively high temperature. Analytical principles based on polarization and depolarization current method with various test conditions are used. Computer simulation can help to analyze the efficiency of insulation paper in transformer oil under different voltages and temperatures. The tested system consists of an electrode inside a high-Temperature and high-voltage control cabinet. It can be concluded that increasing temperature has a marginal effect on the electric field stress of the electrode. However, the rising temperature significantly affects the polarization current that flows through the insulators. The results can indicate the limitation of using oil insulation paper and how to improve the quality of it.
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    Test Chamber Designed with Temperature Control for Partial Discharge and Polarization and Depolarization Current Testing
    (2020-10-25)
    Boonsaner, Nutthaphan
    ;
    Panoon, Nitouch
    ;
    Chancharoensook, Phop
    ;
    Pattanadech, Norasage
    This paper presents the temperature-controlled test chamber for Partial Discharge and Polarization and Depolarization Current test of dielectric liquid including impregnated pressboards with the various conditions. Besides, the temperature of the test specimen is controlled between room temperature to 300°C. The temperature distribution in the test chamber was simulated. Besides, the electric field stress at the electrodes were simulated. Furthermore, different kinds of sensors such as a thermocouple, gas sensors, and so on were designed to be equipped within the test chamber. From the simulated result, both electric field stress and temperature distribution were in the given conditions.