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All Journal JTEV (Jurnal Teknik Elektro dan Vokasional Journal of Development Research J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Jurnal Manajemen Informatika dan Sistem Informasi Jurnal Informatika dan Rekayasa Elektronik Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Journal of Applied Science, Engineering, Technology, and Education Jurnal Bali Membangun Bali Journal La Lifesci Jurnal Ilmiah Telsinas Elektro, Sipil dan Teknik Informasi Jurnal Pengabdian Masyarakat : Pemberdayaan, Inovasi dan Perubahan Open Science and Technology Indonesian Journal of Society Development (IJSD) JAMAS: Jurnal Abdi Masyarakat
Suriana, I Wayan
Universitas Pendidikan Nasional
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Journal : Journal of Development Research

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Prediction of Remaining Life of Transformer at PLTU Suralaya Unit 6 Using Tan Delta Method at 1 mHz and Degree of Polymerization Calculation Yusrizal, Amri; Abiyasa, Agus Putu; Suriana, I Wayan; Adrama, I Nyoman Gede
Journal of Development Research Vol. 9 No. 2 (2025): Volume 9, Number 2, November 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/jdr.v9i2.469

Abstract

Assessing the insulation condition of power transformers is crucial for maintaining the reliability of electrical power systems. This research aims to predict the remaining life of the transformer at PLTU Suralaya Unit 6 by integrating the measurement of the dissipation factor (tan δ) using Dielectric Frequency Response (DFR) testing at ultra-low frequency (1 mHz = 0.001 Hz) and estimating the Degree of Polymerization (DP) through empirical correlation. The DFR measurements were performed with the OMICRON DIRANA device (frequency range 0.1 mHz–1 kHz) and validated against tan δ measurements at 50 Hz using OMICRON CPTD equipment. The dissipation factor at 1 mHz was extracted and converted to an estimated DP value through a validated regression model. Results show a DP value of approximately 302, indicating advanced degradation of the cellulose insulation. This corresponds to an estimated remaining life percentage of 29.68%, equivalent to an operational lifespan of roughly 11.87 years before reaching the end-of-life threshold. The study confirms that ultra-low-frequency DFR testing combined with DP estimation provides a non-destructive and effective approach for transformer remaining life prediction. It is recommended to implement condition-based monitoring and supplement with oil chemical analysis (e.g., furan compounds) and other diagnostic methods to enhance prediction accuracy and support proactive asset management.
Co-Authors Adrama, I Nyoman Gede Adrama, Nyoman Gede Agus Putu Abiyasa Ahmad Feldiansah Antari, Ida Ayu Dwi Giri Ariastina , Wayan Gede Asna, I Made Benediktus Boranpil Juen Dimas Prayoga Elvis Kase Graha, I Made Satya I Gede Adi Setiawan I Made Asna I Made Sariana I Made Satya Graha I Made Suidarma I Nyoman Gede Adrama I Nyoman Oka Suryatmaja I Nyoman Setiawan I Nyoman Setiawan I Wayan Dikse Pancane I Wayan Sugara Yasa I Wayan Sugarayasa I Wayan Sukadana I Wayan Sukadana I Wayan Sutama Ida Ayu Dwi Giriantari Juen, Benediktus Boranpil Kadek Jodi Mustika Kase, Elvis Kevin dita wiratama Komang Hermawan Niken Dwi Wulandari Nuraga, Ketut Pancane, I Wayan Dikse Putri, Ni Luh Gek Idha Dyah Sariana, I Made Setiawan , I Gede Adi Sugara Yasa, I Wayan Sugarayasa, I Wayan Suryadinatha, AAN. Oka Suryatmaja, I Nyoman Oka Sutama, Wayan Wayan Gede Ariastina Yasa, I Wayan Sugara Yusrizal, Amri