Claim Missing Document
Check
Articles

Analysis of Transformer Dielectric Quality at the Kisaran Main Substation of PT. PLN (Persero) ULTG Kisaran Rizinski Khaliksi; Parlin Siagian; Zuraidah Tharo
Jurnal Media Computer Science Vol 5 No 2 (2026): April
Publisher : LPPJPHKI Universitas Dehasen Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37676/jmcs.v5i2.10989

Abstract

This study presents a comprehensive analysis of the dielectric quality of a 60 MVA power transformer at the Kisaran 150kV Substation, North Sumatra, Indonesia. The transformer, manufactured by PAUWELS TRAFO and operated since 2011, operates at an average load of 33% with an ONAN/ONAF cooling system. Dielectric testing yielded a breakdown voltage of 80.2 kV, a moisture content of 17.62 mg/kg, an acid number of 0.108 mgKOH/g, and dissipation factors of 0.173% (primary), 0.190% (secondary), and 0.243% (tertiary). The bushing dissipation factor ranged from 0.247% to 0.271%. The interfacial tension measured 26.8 mN/m with a flash point at 148°C. Insulation resistance testing showed values of 4.9 GΩ (primary), 3.41 GΩ (secondary), and 3.40 GΩ (tertiary) with polarization indices of 3.06, 1.48, and 1.47, respectively. Operating temperatures remained within acceptable limits at 63°C (peak oil) and 62°C (winding). Analysis based on IEC 60422:2013 and PLN standards indicated that the transformer was in good operational condition with all parameters within acceptable ranges, although the interface voltage was close to the warning threshold. This study provides valuable baseline data for predictive maintenance strategies and demonstrates the importance of integrated dielectric testing for transformer health assessment.
Analysis of Ground Fault Relay Settings on 150 kV Short-Circuit Faults at the Paya Pasir Substation B. Siahaan, Alfi Santun; Dino Erivianto; Parlin Siagian
Bahasa Indonesia Vol 18 No 01 (2026): Instal : Jurnal Komputer
Publisher : Cattleya Darmaya Fortuna

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54209/jurnalinstall.v18i01.493

Abstract

Single line-to-ground faults are among the most frequently occurring disturbances in high-voltage transmission systems and are strongly influenced by the sensitivity settings of the Ground Fault Relay (GFR). This study aims to analyze the suitability of ground fault relay settings in response to short-circuit faults in the 150 kV transmission system at Paya Pasir Substation. The research method involves evaluating existing relay settings on feeder bays, bus couplers, and power transformers, then comparing them with calculation standards based on 7% of the smallest short-circuit capacity (CCC). To obtain optimal relay settings, power system simulations were conducted using ETAP version 19.0.1 by modeling the network in a single-line diagram and analyzing single line-to-ground faults. The results show that most existing GFR settings do not meet protection sensitivity standards, with 60% of feeder bay settings classified as unsuitable. After ETAP simulation and protection parameter adjustments, improved relay sensitivity and selectivity were achieved, ensuring proper protection coordination among feeders, busbars, and power transformers. Therefore, ETAP simulation is proven to be an effective tool for evaluating and optimizing ground fault relay settings in a 150 kV transmission system.
Analisis Performansi Kabel N2XY Terhadap Jatuh Tegangan Pada Sistem Tiga Fasa Menggunakan Etap dan Monitoring Real-time Berbasis IoT Pristisal Wibowo; Parlin Siagian; Abdul Razak
Jurnal Komputer Teknologi Informasi Sistem Komputer (JUKTISI) Vol. 4 No. 2 (2025): September 2025
Publisher : LKP KARYA PRIMA KURSUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62712/juktisi.v4i2.681

Abstract

Penelitian ini bertujuan untuk menganalisis performansi kabel N2XY pada sistem tiga fasa tegangan rendah dengan fokus utama pada pengaruh jatuh tegangan yang terjadi. Masalah jatuh tegangan dalam sistem distribusi listrik seringkali mengakibatkan turunnya kualitas pasokan daya, sehingga memerlukan analisis menyeluruh terhadap parameter sistem yang digunakan. Metode penelitian ini mencakup pengukuran langsung di lapangan, perhitungan manual menggunakan rumus dasar teknik listrik, serta simulasi dengan perangkat lunak ETAP 12.6.0 untuk memvalidasi hasil analisis. Hasil penelitian menunjukkan bahwa pada jarak 1,3 km dengan kabel N2XY berpenampang 4 x 70 mm² dan beban total sebesar 20,7 kW, diperoleh jatuh tegangan sebesar 33,3 V (8,31%) berdasarkan pengukuran, 33,89 V (8,47%) dari perhitungan, dan 25,8 V (6,5%) melalui simulasi ETAP. Disarankan untuk memperbesar penampang kabel guna meminimalisir jatuh tegangan dan menjaga kestabilan sistem distribusi daya listrik
Analisis Sistem Pembumian Tower Dengan Menggunakan Mesh Grid Grounding Pada T.213 SUTT 70 kV Pekalongan - Sukamerindu Erawati Purnama Panjaitan; Parlin Siagian; Siti Anisah
Jurnal Multidisiplin Dehasen (MUDE) Vol 5 No 3 (2026): Juli
Publisher : LPPJPHKI Universitas Dehasen Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37676/mude.v5i3.11281

Abstract

The grounding system is an important part of maintaining the safety and reliability of electrical power transmission systems, especially in high-voltage transmission towers. In transmission towers, the grounding system functions to safely conduct fault currents caused by lightning strikes or short circuits to the ground. This study aims to analyze the grounding system of a 70 kV transmission tower using the Mesh Grid Grounding System (MGGS) method on Tower T.213 of the Pekalongan - Sukamerindu line. The research method used is a quantitative method with a technical analysis approach, namely calculating the grounding resistance of the grid system, the ground rod system, and the total MGGS grounding resistance based on field data. The data used included soil resistivity of 48.7 Ωm, grid conductor length of 66 m, grid area of 36 m², conductor planting depth of 1 m, and the use of 20 ground rods with a length of 2 m. The calculation results were then compared with the field measurement results to determine the reliability level of the grounding system. The results of the study show that the initial grounding resistance value of 8.46 Ω can be reduced to 4.46 Ω after applying the MGGS method. The reduction in grounding resistance value reached 47.3%, indicating that the MGGS method is effective in improving the performance of the tower grounding system. Based on an evaluation of the IEEE Std 80 standard, the final grounding resistance value obtained was still below the recommended maximum limit, so the grounding system of Tower T.213 was declared safe and suitable for use. Thus, the application of the Mesh Grid Grounding System (MGGS) method has been proven to improve the reliability and safety of the grounding system on 70 kV transmission towers.