Evaluasi Performa Dielektrik Nanofluida Ester Sintetis Dengan Kombinasi Nanopartikel Semikonduktif–Isolatif (TiO₂-Al₂O₃) Pada Kondisi Terkontaminasi Selulosa

Maharani, Alya (2026) Evaluasi Performa Dielektrik Nanofluida Ester Sintetis Dengan Kombinasi Nanopartikel Semikonduktif–Isolatif (TiO₂-Al₂O₃) Pada Kondisi Terkontaminasi Selulosa. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan keandalan sistem isolasi transformator memerlukan pengembangan bahan isolasi cair yang memiliki performa dielektrik yang tinggi, terutama pada kondisi terkontaminasi partikel padat. Studi ini bertujuan untuk mengevaluasi performa dielektrik nanofluida ester sintetis dengan kombinasi nanopartikel semikonduktif–isolatif (TiO₂-Al₂O₃) pada kondisi terkontaminasi selulosa. Sampel dibuat dalam enam variasi konsentrasi Al₂O₃–TiO₂ dan tiga variasi kontaminan selulosa, yaitu 0 g/L, 0,5 g/L, dan 1 g/L. Pengujian meliputi sedimentasi, Breakdown Voltage (BDV), Partial Discharge Inception Voltage (PDIV), Partial Discharge Extinction Voltage (PDEV), Phase Resolved Partial Discharge (PRPD), serta pembentukan jembatan selulosa. Hasil studi menunjukkan bahwa AT2 dengan konsentrasi 85% Al₂O₃ dan 15% TiO₂ memiliki performa terbaik, dengan BDV Sphere to Sphere sebesar 78,20 kV tanpa selulosa, 22,29 kV pada 0,5 g/L, dan 19,81 kV pada 1 g/L. Penambahan selulosa dapat menurunkan performa dielektrik sampel. Hasil studi ini menunjukkan bahwa penentuan performa dielektrik sampel tidak cukup dilakukan melalui satu parameter atau satu jenis pengujian saja, tetapi perlu dianalisis dengan beberapa pengujian. Secara keseluruhan, konsentrasi Al₂O₃–TiO₂ yang tepat mampu memperlambat pergerakan elektron, menunda pembentukan streamer, dan meningkatkan performa nanofluida ester sintetis.
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Improving the reliability of transformer insulation systems requires the development of liquid insulating materials with high dielectric performance, particularly under conditions contaminated by solid particles. This study aims to evaluate the dielectric performance of synthetic ester-based nanofluids containing a combination of semiconductive–insulating nanoparticles (TiO₂–Al₂O₃) under cellulose contaminated conditions. The samples were prepared with six Al₂O₃–TiO₂ ratio variations and three cellulose contamination levels, 0 g/L, 0.5 g/L, and 1 g/L. The tests included sedimentation observation, Breakdown Voltage (BDV), Partial Discharge Inception Voltage (PDIV), Partial Discharge Extinction Voltage (PDEV), Phase Resolved Partial Discharge (PRPD), and cellulose bridge formation. The results show that AT2, with a composition of 85% Al₂O₃ and 15% TiO₂, exhibited the best performance, with Sphere to Sphere BDV values of 78.20 kV without cellulose, 22.29 kV at 0.5 g/L cellulose, and 19.81 kV at 1 g/L cellulose. The addition of cellulose was found to reduce the dielectric performance of the samples. The findings also indicate that determining the dielectric performance of a sample cannot rely on a single parameter or one type of test alone, but should be analyzed through multiple tests. Overall, the appropriate Al₂O₃–TiO₂ ratio can slow charge movement, delay streamer formation, and improve the performance of synthetic ester based nanofluids.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Nanopartikel; Nanofluida; Partikel Selulosa; Tegangan Tembus; Partial Discharge; Nanofluid; Cellulose Particles; Breakdown Voltage; Partial Discharge
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:	Alya Maharani
Date Deposited:	22 Jul 2026 02:23
Last Modified:	22 Jul 2026 02:23
URI:	http://repository.its.ac.id/id/eprint/136480

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