Monitoring Porcelain Insulator Condition Based on Leakage Current Characteristics

• Published in: Materials Vol. 15; no. 18; p. 6370
• Main Authors: Salem, Ali Ahmed, Lau, Kwan Yiew, Ishak, Mohd Taufiq, Abdul-Malek, Zulkurnain, Al-Gailani, Samir A., Al-Ameri, Salem Mgammal, Mohammed, Ammar, Alashbi, Abdulaziz Ali Saleh, Ghoneim, Sherif S. M.
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-09-2022; MDPI
• Subjects: Acoustics; classification; Condition monitoring; contamination; Efficiency; Electricity distribution; Evaluation; Fault diagnosis; Flashover; Fourier transforms; Harmonic distortion; Humidity; Inclinometers; Indicators; Laboratory tests; Leakage current; leakage current characteristics; Pollution; Porcelain; porcelain insulator; Wetting; Malaysia
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma15186370

Insulator monitoring using leakage current characteristics is essential for predicting an insulator’s health. To evaluate the risk of flashover on the porcelain insulator using leakage current, experimental investigation of leakage current indices was carried out. In the first stage of the experiment, the effect of contamination, insoluble deposit density, wetting rate, and uneven distribution pollution were determined on the porcelain insulator under test. Then, based on the laboratory test results, leakage current information in time and frequency characteristics was extracted and employed as assessment indicators for the insulator’s health. Six indicators, namely, peak current indicator, phase shift indicator, slope indicator, crest factor indicator, total harmonic distortion indicator, and odd harmonics indicator, are introduced in this work. The obtained results indicated that the proposed indicators had a significant role in evaluating the insulator’s health. To evaluate the insulator’s health levels based on the extracted indicator values, this work presents the naïve Bayes technique for the classification and prediction of the insulator’s health. Finally, the confusion matrix for the experimental and prediction results for each indicator was established to determine the appropriateness of each indicator in determining the insulator’s health status.