Pengaruh Kecepatan Aliran Minyak Mineral Bersirkulasi Dengan Kontaminan Serbuk Tembaga Terhadap Karakteristik Tegangan Tembus DC

Santoso, Akilla Farri (2024) Pengaruh Kecepatan Aliran Minyak Mineral Bersirkulasi Dengan Kontaminan Serbuk Tembaga Terhadap Karakteristik Tegangan Tembus DC. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Keberadaan partikel konduktif dalam minyak isolasi menurunkan kinerja trafo daya. Penelitian saat ini banyak berfokus pada minyak trafo dalam kondisi statis. Namun, pada kondisi aktual, minyak trafo yang bersirkulasi mempengaruhi pergerakan partikel konduktif sehingga karakteristik PD dan breakdown voltage berubah. Pada penelitian ini diukur parameter PD dan breakdown voltage pada minyak trafo yang bergerak dengan partikel konduktif. Penelitian ini bertujuan untuk menginvestigasi pengaruh kecepatan aliran minyak mineral dengan kontaminan serbuk tembaga terhadap karakteristik breakdown voltage dan partial discharge. Media uji dimodelkan sesuai kondisi trafo eksisting dengan sistem minyak isolasi bersirkulasi. Pengujian dilakukan terhadap variasi kecepatan aliran. Pengujian tegangan tembus dilakukan sebanyak 20 kali per-sampel dengan menaikkan tegangan hingga terjadi kegagalan. Pengujian partial discharges dilakukan menggunakan HFCT sebagai pendeteksi PD. Hasil penelitian menunjukkan bahwa dengan meningkatnya kecepatan aliran minyak, breakdown voltage dan PDIV menjadi lebih tinggi, sedangkan besar dan frekuensi pelepasan muatan berkurang. Penelitian ini juga melakukan analisis Pulse Sequence Analysis (PSA) untuk mengamati pola persebaran, discharge magnitude, dan durasi terjadinya PD. Pola PSA menunjukkan bahwa dengan meningkatnya kecepatan aliran sirkulasi minyak, besar arus PD dan frekuensi pelepasan muatan berkurang, sementara interval waktu antara pulsa PD semakin panjang. Penelitian dapat digunakan untuk menjadi acuan penelitian selanjutnya.
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The presence of conductive particles in insulating oil can lead to a decline in the performance of power transformers. Current research is primarily focused on transformer oil under controlled statistical conditions. However, in real-world scenarios, the movement of conductive particles in circulating transformer oil can impact the PD characteristics and breakdown voltage. This study involved measuring the PD parameters and breakdown voltage in an oil transformer containing conductive particles. The main objective was to explore how the flow velocity of mineral oil contaminated with copper powder affects the breakdown voltage and partial discharge characteristics. The test conditions were designed to mimic those of an actual transformer with a circulating oil isolation system. Various flow speeds were tested, with breakdown voltage testing involving increasing the voltage until failure occurred in 20 trials per sample. Partial discharge testing was conducted using HFCT as the PD detector. The findings revealed that as the oil flow velocity increased, both the breakdown voltage and PDIV also increased, while the discharge frequency was high and decreased. Additionally, Pulse Sequence Analysis (PSA) was carried out to examine the distribution patterns, discharge magnitude, and duration of PD. The PSA pattern indicated that as the oil circulation flow rate increased, the magnitude of the PD current and the frequency of discharges decreased, while the interval between the PD pulses became longer. This study can provide valuable insights for future research on breakdown voltage and PD characteristics in circulating mineral oil.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	breakdown voltage, copper particle contamination, dc voltage, moving mineral oil, partial discharges, kontaminasi partikel tembaga, minyak mineral bersirkulasi, partial discharges, tegangan dc, tegangan tembus.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3401 Insulation and insulating materials
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Akilla Farri Santoso
Date Deposited:	29 Jul 2024 04:22
Last Modified:	29 Jul 2024 04:22
URI:	http://repository.its.ac.id/id/eprint/109658

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