Analisis Pengaruh Bentuk Elektroda Terhadap Karakteristik Perkembangan Breakdown pada Lembar Isolator Polimer Menggunakan High-Speed Camera

Prayogi, Achmad Djohan (2023) Analisis Pengaruh Bentuk Elektroda Terhadap Karakteristik Perkembangan Breakdown pada Lembar Isolator Polimer Menggunakan High-Speed Camera. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Studi ini menganalisis pengaruh bentuk elektroda terhadap karakteristik perkembangan breakdown pada lembar isolator polimer menggunakan high-speed camera. Variasi bentuk elektroda yang dianalisis adalah bentuk elektroda tak seragam, elektroda seragam, dan elektroda bola-datar sesuai dengan standar IEC 600243. Pengujian flashover dan breakdown pada lembar isolator polimer dilakukan menggunakan tegangan tinggi AC yang disuplai dari transformator uji. Proses perkembangan breakdown pada lembar isolator polimer diamati secara visual menggunakan alat high-speed camera. Data karakteristik perkembangan breakdown diperoleh dengan pengolahan data gambar dalam skala mili-sekon. Kemudian, data juga dibandingkan dengan hasil simulasi distribusi medan listrik berbasis finite element method (FEM). Hasil pengujian menunjukkan bahwa bentuk elektroda mempengaruhi breakdown voltage dengan nilai terbesar pada bentuk elektroda bola-datar yaitu 47,67 kV, diikuti bentuk elektroda seragam yaitu 44,86 kV, dan nilai terkecil pada bentuk elektroda tak seragam yaitu 31,35 kV. Karakteristik perkembangan breakdown pada masing-masing bentuk elektroda menghasilkan fenomena surface discharge akibat adanya peningkatan medan listrik pada triple point (titik temu antara elektroda, lembar isolator poolimer, dan minyak mineral). Namun, pada bentuk elektroda tak seragam dan elektroda seragam, luas area surface discharge yang terlalu besar yaitu melebihi 200 mm2 dapat memicu munculnya flashover. Selain itu, analisis korelasi dengan koefisien sebesar -0,92 menunjukkan bahwa kuat medan listrik maksimal akibat pengaruh bentuk elektroda memiliki hubungan erat dengan breakdown voltage pada lembar isolator polimer.
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This study analyzes the effect of electrode shape on the characteristics of breakdown development on polymer insulator sheets using a high-speed camera. The variations of electrode shapes that will be analyzed are unequal diameter electrodes, equal diameter electrodes, and sphere-plate electrodes based on IEC 600243. Flashover and breakdown testing are performed on polymer insulator sheets using high-voltage AC that is supplied by a testing transformer. The development process of breakdown on the polymer insulator sheet is visually observed using a high-speed camera tool. Data on breakdown development characteristics are obtained by processing image data on a millisecond scale. Furthermore, the data was also compared with the results of finite element method (FEM)-based simulations of electric field distribution. The experiment results indicate that the electrode shape affects the breakdown voltage, with the highest value observed in the sphere-plate electrodes, which is 47.67 kV, followed by the equal diameter electrodes at 44.86 kV, and the smallest value in the unequal diameter electrodes at 31.35 kV. The breakdown development characteristics in each electrode shape result in the phenomenon of surface discharge due to electric field enhancement at triple point (point between electrode, polymeric insulator sheet, and mineral oil). However, in the unequal diameter electrodes and equal diameter electrodes, a surface discharge area exceeding 200 mm2 can trigger flashover. In addition, correlation analysis with a coefficient of -0.92 indicates that the maximum electric field strength, due to electrode shape, has a close relationship with the breakdown voltage of the polymer insulator sheet.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Bentuk Elektroda, Flashover, Isolator Polimer, Karakteristik Breakdown
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK201 Electric Power Transmission T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3401 Insulation and insulating materials
Divisions:	Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Achmad Djohan Prayogi
Date Deposited:	27 Jul 2023 03:03
Last Modified:	27 Jul 2023 03:03
URI:	http://repository.its.ac.id/id/eprint/99475

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