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Journal : Aviation Electronics, Information Technology, Telecommunications, Electricals, Controls (AVITEC)

Duval Triangle-Based Dissolved Gas Analysis using GNU Octave for Transformer Fault Detection Putri, Ervina Galuh Ika; Pravitasari, Deria; Yuliantari, Risky Via
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 7, No 3 (2025): November (Special Issue)
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v7i3.3156

Abstract

Transformers are vital components in electrical power systems. However, they are also susceptible to various types of failures, including thermal and electrical faults caused by the formation of electromotive force, which, if left unaddressed, may result in degradation of the oil insulation. One effective approach to mitigate such issues is to conduct feasibility testing and oil analysis, commonly known as Dissolved Gas Analysis (DGA), which examines the condition of the insulating fluid within the transformer. In this study, gas concentration levels were identified as follows: C₂H₄ = 9 ppm, CH₄ = 4 ppm, and C₂H₂ = 11 ppm. These values were visualized using the Duval Triangle Method, an established technique for analyzing gas content by measuring the concentration of three primary gases: Methane (CH₄), Ethylene (C₂H₄), and Acetylene (C₂H₂), all of which dissolve in the transformer oil. The advantage of this method lies in its ability to serve as an early fault detection tool for transformer oil. The analysis results indicated an electrical fault categorized as a High Energy Discharge in zone D2, identified by a single plotted point where the three gas lines intersect on the triangle diagram. This type of discharge is predominantly associated with Acetylene gas (C₂H₂) and is typically triggered by intense internal arcing within the transformer. The interpretation was further implemented using an automated data plotting system in GNU Octave, serving as a Transformer Fault Detection tool and computational software that utilizes the C++ programming language for data processing and visualization.
Perancangan Pembangkit Listrik Tenaga Surya (PLTS) Atap On-Grid 44 kWp untuk Melayani Beban Penerangan di Industri Wibowo, Kristianto Agung; Pravitasari, Deria; Kurniawan, Andriyatna Agung; Nawawi, Ibrahim
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 6, No 2 (2024): August
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v6i2.2194

Abstract

Saat ini pemerintah terus mendorong masyarakat untuk memanfaatkan EBT di Indonesia untuk mencapai target bauran sebanyak 23 % di tahun 2025. Pada penelitian ini dilakukan perancangan PLTS atap on-grid pada salah satu industri yang bergerak di bidang pengolahan bahan pangan hewani. PLTS digunakan untuk melayani beban penerangan dengan standar kelayakan mengikuti panduan EBTKE ESDM (SNI 8395:2017) dan sistem instalasi pemasangan berdasarkan PUIL 2011. Berdasarkan hasil perancangan digunakanlah modul surya jenis monocrystalline 410 Wp sebanyak 108 unit dan satu unit inverter 40 kW yang menghasilkan energi sebesar 63.032,58 kWh/tahun dan pengurangan emisi gas karbon dioksida (CO2) sebanyak 78.790,725 ton/tahun. Hasil kelayakan ekonomi dengan investasi awal Rp. 548.890.000, menghasilkan NPV Rp. 72.019.012, BCR 1,11, dan payback period pada tahun ke-18. Hasil tersebut menunjukkan bahwa PLTS dapat melayani beban penerangan dan melakukan penghematan energi listrik sebesar penggunaan beban penerangan harian di industri.
Perencanaan Fire Alarm dan Pemadam Kebakaran pada Gedung Dekanat 7 Lantai Universitas Tidar Mertoyudan Kurmia, Shely; Nisworo, Sapto; Pravitasari, Deria; Trihasto, Agung
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 6, No 2 (2024): August
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v6i2.2141

Abstract

Perencanaan fire alarm dan pemadam kebakaran pada Gedung Dekanat 7 lantai Universitas Tidar Mertoyudan dilakukan karena terdapat risiko kebakaran yang upaya penanggulangannya sulit dilakukan. Dalam menyelesaikan perencanaan ini memerlukan beberapa tahapan yang mencakup studi literatur, pengumpulan data dan pengolahan data. Berdasarkan hasil perhitungan yang telah dilakukan dapat disimpulkan bahwa sesuai SNI 03-3985-2000 membutuhkan detektor asap 82 unit, sesuai SNI 03-3989-2000 membutuhkan sprinkler 129 unit, volume air yang dibutuhkan 232 m3, Ground Water Tank (GWT) berkapasitas 300 m3, daya pompa yang dibutuhkan yaitu daya pompa elektrik 36 kW, pompa jockey 3,6 kW, dan pompa diesel 140 HP. Perhitungan perencanaan fire alarm dan pemadam kebakaran ini telah sesuai dengan peraturan dan standar diharapkan dapat meningkatkan keselamatan penghuni serta melindungi aset-aset berharga.
Performance Evaluation of Overcurrent Relay Coordination on 20-kV Busbar and Feeders Rizkianto, Ageng; Trihasto, Agung; Pravitasari, Deria; Setiawan, Hery Teguh
Aviation Electronics, Information Technology, Telecommunications, Electricals, and Controls (AVITEC) Vol 8, No 1 (2026): February
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/avitec.v8i1.3484

Abstract

The coordination of Overcurrent Relays (OCR) in power systems is crucial to ensure selectivity and reliability. Mis-coordination between OCRs on the 20-kV busbar and feeders can significantly reduce system performance, often due to improper determination of pick-up values and Time Multiplier Setting (TMS). Previous studies mostly focused on protection coordination for a single feeder and relied solely on simulation. This study evaluates OCR coordination on the 20-kV busbar and five feeders connected to the Unit I transformer at Secang Substation by combining manual analysis and Electrical Transient Analyzer Program (ETAP) simulations, validated against IEEE Std 242-2001. This integrated approach provides more reliable insights than earlier works limited to single-feeder coordination or software-only methods. Evaluation was conducted through short-circuit current analysis and Time Current Characteristic (TCC) curves, yielding pick-up and TMS values that produce Coordination Time Intervals (CTI) in compliance with IEEE Std 242-2001. Results indicate that the busbar OCR achieved a pick-up of 0.566 and a TMS of 0.236. For the feeders, SCG 10 achieved 0.27 and 0.173; SCG 03 yielded 0.5025 and 0.147; SCG 05 produced 0.441 and 0.153; SCG 07 yielded 0.35 and 0.165; and SCG 08 achieved 0.5535 and 0.137. Applying these settings produced CTI values exceeding the minimum requirement of 0.3 seconds. This evaluation demonstrates that coordinated OCR settings can improve reliability in 20-kV distribution systems and reduce the risk of widespread outages due to protection failures.