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Author: search.filters.author.Kingkham, SukanyaHas files: No

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    Item type:Publication,
    Development of a Health Index for Transformer Condition Assessment Using an Online Dashboard
    (2025-01-01)
    Sripatawasumadee, Kornchet
    ;
    Maneerat, Noppadol
    ;
    Dechothamsathit, Vorawut
    ;
    Kingkham, Sukanya
    ;
    Jeenmuang, Siwakorn
    Power transformers are critical components in electrical power systems in the transmission and distribution of electricity. Keeping them in good working condition is necessary to prevent power outages and ensure system stability. Traditional maintenance strategies, such as time-based maintenance, may not always be the best way to avoid problems or use resources efficiently. To improve this, the concept of a Health Index (HI) has been introduced as a systematic method for transformer condition assessment. By integrating various diagnostic data - such as load data, oil analysis, maintenance record, and on-load tap changer (OLTC) parts - into a unified HI score, asset managers can make informed decisions regarding maintenance prioritization and replacement planning. Furthermore, this paper proposes the development of an online dashboard system that facilitates the input, storage, and visualization of transformer health data. This user-friendly platform enables engineers to monitor condition trends in real time and supports strategic maintenance scheduling. The integration of Health Index evaluation with an accessible digital interface enhances the efficiency, transparency, and reliability of transformer asset management practices.
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    Partial Discharge Characteristics of MV Switchgear Using TEV and HFCT Sensors
    (2024-01-01)
    Kingkham, Sukanya
    ;
    Smerpitak, Krit
    ;
    Inwanna, Woranan
    ;
    Jeenmuang, Siwakorn
    ;
    Buranaaudsawakul, Techatat
    This paper presents partial discharge (PD) experiments for a medium voltage (MV) switchgear. Various types of defects were simulated i.e., corona discharge, surface discharge, and floating discharge inside the simulated MV switchgear. The transient earth voltage (TEV) was employed as a PD sensor to acquire the PD signals generated by the simulated PD defects. The TEV sensors were installed on the simulated metal enclosures MV switchgear to detect electromagnetic (EM) pulse radiated through such metal housing. Besides, high-frequency current transformer (HFCT) sensors were also used for a purpose similar to that of a TEV. Based on laboratory test results, it was found that when the external structural material and internal partition wall of the MV switchgear have greater insulation properties, some of the PD signals detected by the TEV sensor tend to exhibit a significant decrease in signal magnitude. The detected PD results of the simulating PD sources inside the MV switchgear will be presented in this paper. Moreover, the field test PD experiment for the MV switch gear is also reported.