Karakteristik Dielektrik Nanofluid Ester Sintetis Dengan Kombinasi Nanopartikel Konduktif Dan Isolatif (Fe3O4–Al2O3) Pada Kondisi Terkontaminasi Selulosa

Muhammad Nabil, Alzuhdi (2026) Karakteristik Dielektrik Nanofluid Ester Sintetis Dengan Kombinasi Nanopartikel Konduktif Dan Isolatif (Fe3O4–Al2O3) Pada Kondisi Terkontaminasi Selulosa. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Transformator memerlukan media isolasi cair yang memiliki karakteristik dielektrik baik untuk menjaga keandalan operasi. Studi ini bertujuan menganalisis pengaruh kombinasi nanopartikel konduktif Fe3O4 dan isolatif Al2O3 terhadap karakteristik dielektrik minyak ester sintetis pada kondisi terkontaminasi selulosa. Nanofluid disiapkan dengan variasi konsentrasi Fe3O4–Al2O3 dan kontaminasi selulosa sebesar 0 g/L, 0,5 g/L, dan 1 g/L. Karakteristik dielektrik dievaluasi melalui pengujian tegangan tembus dan partial discharge, sedangkan pengujian sedimentasi dilakukan untuk mengamati kestabilan dispersi nanopartikel. Tegangan tembus diuji menggunakan konfigurasi elektroda sphere to sphere dan needle to plane, kemudian dianalisis menggunakan distribusi Weibull dan Welch’s t-test. Pengujian partial discharge dilakukan untuk memperoleh nilai Partial Discharge Inception Voltage (PDIV), Partial Discharge Extinction Voltage (PDEV), dan pola Phase Resolved Partial Discharge (PRPD). Hasil studi ini menunjukkan kombinasi nanopartikel Fe3O4– Al2O3 berpengaruh terhadap kestabilan nanofluid dan performa dielektrik minyak ester sintetis. Konsentrasi 85% Fe₃O₄ +15% Al2O3 menghasilkan performa optimal pada sebagian besar pengujian, sedangkan performa terendah diperoleh pada konsentrasi 70% Fe3O4+30% Al2O3 pada kondisi tanpa kontaminasi selulosa dan 50% Fe3O4+50% Al2O3 pada kondisi terkontaminasi selulosa. Selain itu, peningkatan kontaminasi selulosa menyebabkan penurunan nilai tegangan tembus dan memengaruhi aktivitas partial discharge.
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Transformers require liquid insulation media with adequate dielectric properties to ensure reliable operation. This study investigates the effect of combining conductive Fe3O4 nanoparticles and insulating Al2O3 nanoparticles on the dielectric characteristics of synthetic ester oil under cellulose-contaminated conditions. Nanofluids were prepared using various Fe3O4–Al2O3 concentration ratios and cellulose contamination levels of 0 g/L, 0.5 g/L, and 1 g/L. The dielectric performance of the nanofluids was evaluated through breakdown voltage and partial discharge tests, while sedimentation testing was conducted to assess nanoparticle dispersion stability. Breakdown voltage tests were performed using sphere to sphere and needle to plane electrode configurations, and the results were analyzed using Weibull distribution and Welch’s t-test. Partial discharge testing was conducted to obtain the Partial Discharge Inception Voltage (PDIV), Partial Discharge Extinction Voltage (PDEV), and Phase Resolved Partial Discharge (PRPD) patterns. The results demonstrate that the Fe3O4– Al2O3 nanoparticle combination significantly affects both nanofluid stability and the dielectric performance of synthetic ester oil. The 85% Fe3O4+ 15% Al2O3 concentration exhibited the best overall performance in most tests, whereas the lowest performance was observed at 70% Fe3O4+ 30% Al2O3 under uncontaminated conditions and 50% Fe3O4+ 50% Al2O3 under cellulosecontaminated conditions. Furthermore, increasing cellulose contamination reduced breakdown voltage and influenced partial discharge activity.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Minyak Ester Sintetis, Nanopartikel Fe₃O₄–Al₂O₃, Partial Discharge, Partikel Selulosa, Tegangan Tembus, Breakdown Voltage, Cellulose Particles, Fe₃O₄–Al₂O₃ Nanoparticles, Partial Discharge, Synthetic Ester Oil
Subjects:	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:	Muhammad Nabil Alzuhdi
Date Deposited:	22 Jul 2026 03:48
Last Modified:	22 Jul 2026 03:48
URI:	http://repository.its.ac.id/id/eprint/136215

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