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All Journal Pendidikan Bahasa Inggris Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Riau Biologia Sistemasi: Jurnal Sistem Informasi INTECOMS: Journal of Information Technology and Computer Science Jurnal Qua Teknika Journal of Computer Science, Information Technology and Telecommunication Engineering (JCoSITTE) Jurnal Nasional Holistic Science Jurnal Media Computer Science GEMBIRA (Pengabdian Kepada Masyarakat)
Haris Gunawan
Pusat Teknologi Bahan Bakar Nuklir - BATAN
Religion Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Other

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Analysis of Power Transformer Oil Insulation Capability Against Breakdown Voltage Due to Temperature and Loading Gea, Daniman; Gunawan, Haris; Lesmana, Dicky
Journal of Computer Science, Information Technology and Telecommunication Engineering Vol 6, No 1 (2025)
Publisher : Universitas Muhammadiyah Sumatera Utara, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/jcositte.v6i1.23674

Abstract

The reliability of power transformers heavily depends on the performance of insulating oil, which serves as both an electrical insulation medium and a cooling agent. One of the key factors in maintaining the quality of insulating oil is its breakdown voltage, which determines the oil's ability to withstand electrical stress before insulation failure occurs. The rise in temperature during transformer operation can lead to a decrease in the oil's breakdown voltage, thus affecting the overall reliability of the transformer. This study aims to analyze the effect of temperature rise on the breakdown voltage of power transformer oil. Testing was conducted through simulations and laboratory measurements at various temperatures to identify the relationship between temperature and the oil's breakdown voltage. The results of the study indicate that an increase in temperature significantly reduces the breakdown voltage of insulating oil, thereby increasing the risk of insulation failure and reducing transformer reliability. The conclusions of this study provide essential recommendations for managing transformer operating temperatures to maintain optimal reliability and service life while avoiding potential failures caused by insulating oil degradation.
DESAIN DAN SIMULASI FILTER UNTUK MENURUNKAN HARMONISA PADA TRANSFORMATOR 3 FASA BERBASIS MATLAB Fahlevi, T. Shandy Putra; Siagian, Parlin; Rahmaniar, Rahmaniar; Gunawan, Haris
INTECOMS: Journal of Information Technology and Computer Science Vol. 8 No. 4 (2025): INTECOMS: Journal of Information Technology and Computer Science
Publisher : Institut Penelitian Matematika, Komputer, Keperawatan, Pendidikan dan Ekonomi (IPM2KPE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31539/cv1yv725

Abstract

Transformator tiga fasa merupakan komponen vital dalam sistem distribusi tenaga listrik, namun berpotensi menghasilkan dan menyebarkan harmonisa akibat beban non-linier. Harmonisa ini dapat menurunkan efisiensi, menyebabkan panas berlebih, dan gangguan pada peralatan lain. Penelitian ini bertujuan untuk merancang dan mensimulasikan filter untuk mitigasi harmonisa pada transformator tiga fasa menggunakan perangkat lunak MATLAB. Data bentuk gelombang arus dan tegangan dari ketiga fasa diperoleh melalui pengukuran lapangan. Simulasi dilakukan untuk membandingkan kondisi sistem sebelum dan sesudah pemasangan filter. Hasil menunjukkan bahwa penggunaan filter mampu menurunkan total harmonisa (THD) pada orde ketiga dari 13,17% menjadi 7,02%. Penelitian ini memberikan kontribusi pada upaya peningkatan kualitas daya dan keandalan sistem distribusi.
ANALISIS KINERJA MOTOR INDUKSI TIGA PHASE SEBAGAI PENDISTRIBUSIAN AIR PADA KAMPUS POLITEKNIK PENERBANGAN MEDAN Damanik, M. Satria Miranda; Dalimunthe, Muhammad Erpandi; Gunawan, Haris; Damanik, Risjunardi
Jurnal Qua Teknika Vol 15 No 02 (2025): September 2025
Publisher : Universitas Islam Balitar Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35457/quateknika.v15i02.4762

Abstract

Motor induksi tiga fasa adalah alat listrik yang mengubah energy listrik menjadi energi mekanik, dimana listrik yang diubah adalah listrik 3 fasa. Kampus Politeknik Penerbangan Medan (POLTEKBANG) yang memiliki beberapa gedung bertingka, untuk memenuhi kebutuhan air bersih di gedung bertingkat ini pihak dari Kampus Politeknik Penerbangan Medan (POLTEKBANG) memanfaatkan motor listrik untuk memenuhi ketersediaan air bersih yang memadai. tujuan dari penelitian ini adalah Untuk mengetahui nilai efesiensi kinerja Motor Induksi 3 Phase untuk distribusi air bersih di Kampus Politeknik Penerbangan Medan (POLTEKBANG).
Comparative Analysis Of The Efficiency Of Auxiliary Power Unit (APU) And Ground Support Equipment (GSE) On The Electrical System Of Airbus A320 Aircraft Ardiansyah, Luvan; Siagian, Parlin; Gunawan, Haris
Jurnal Media Computer Science Vol 5 No 1 (2026): Januari
Publisher : LPPJPHKI Universitas Dehasen Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37676/jmcs.v5i1.9195

Abstract

This research analyzes the efficiency comparison between the Auxiliary Power Unit (APU) and Ground Power Unit (GPU) on the Airbus A320 aircraft's electrical system during ground operations. Aircraft operations require a stable power supply, provided by either an internal APU or an external GPU. Although the APU offers flexibility, its high fuel consumption and significant environmental impact are considerable concerns. Conversely, the GPU is deemed more efficient and environmentally friendly. The study aims to calculate energy consumption, analyze efficiency, and recommend the most efficient and environmentally sound electrical power source. The method employed is a quasi-experimental field observation, involving direct data collection from a Houchin LTD model C690 GPU unit. Data collection was conducted over 7 days, from June 1 to June 7, 2025. Data analysis includes mathematical calculations for energy efficiency and operational economic analysis. Research findings indicate that the GPU significantly outperforms the APU. The diesel GPU exhibits an energy efficiency of approximately 31.30%, considerably higher than the APU's around 1.54% (based on 7 days of data). The GPU also presents superior electrical power quality, characterized by a higher Power Factor and lower Total Harmonic Distortion (THD). It is recommended that airlines prioritize GPU usage, and airport authorities expand Fixed Electrical Ground Power (FEGP) infrastructure to enhance energy efficiency and reduce operational costs.
Analysis and Simulation of Load Unbalance of Distribution Transformer Feeder Lk.10 in ULP Medan City Sam, Jihan Fadillah; Rahmaniar, Rahmaniar; Gunawan, Haris
Holistic Science Vol. 5 No. 2 (2025): Jurnal Nasional Holistic Sciences
Publisher : Lembaga Riset Mutiara Akbar NOMOR AHU-0003295.AH.01.07 TAHUN 2021

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56495/hs.v5i2.1239

Abstract

Load imbalance in three-phase distribution transformers leads to high neutral currents, increased power losses, and decreased system efficiency. This study aims to analyze and simulate load imbalances on distribution transformers located on Feeder LK.10 at PT PLN (Persero) ULP Medan Kota. Data collection was conducted through field measurements of voltage and current, followed by manual calculations and simulations using ETAP 19. The analysis focused on load imbalance percentage, transformer loading, neutral current, and power losses. Results indicate that several transformers exhibit critical imbalance conditions, with some exceeding 25% load imbalance and significant neutral current. The ETAP 19 simulation results show a high level of accuracy compared to actual field measurements, with an average error below 3%. This study confirms that accurate monitoring and proper load redistribution are essential to maintain distribution transformer performance. The findings are expected to support PLN in improving power quality and reliability in distribution systems.
Distribution Information System at Rani Motor Workshop with DRP Method to Improve Sparepart Delivery Timeliness Gunawan, Haris; Fakhriza, Muhammad
Sistemasi: Jurnal Sistem Informasi Vol 13, No 4 (2024): Sistemasi: Jurnal Sistem Informasi
Publisher : Program Studi Sistem Informasi Fakultas Teknik dan Ilmu Komputer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32520/stmsi.v13i4.4346

Abstract

Rani Motor Workshop in North Sumatra faces several problems in its operations, such as inefficient inventory management, late delivery of spare parts, and unstructured distribution planning. This research aims to overcome these problems by integrating the Distribution Requirement Planning (DRP) method in its distribution information system using a research and development (R&D) approach and a waterfall development model. By detailing the flow of data input, distribution planning, parts delivery, and distribution performance recording, this research proposes a framework that integrates the research & development method and the waterfall system development method. Through these steps, this research aims to improve the efficiency and timeliness of delivery. The results of this research are expected to make a positive contribution to the operations of Bengkel Rani Motor, by proving that the implementation of a distribution information system using the DRP method can optimize stock, reduce delays, and increase customer satisfaction.
Pengelolaan Lahan Gambut Tanpa Bakar: Upaya Alternatif Restorasi pada Lahan Gambut Basah Afriyanti, Dian; Humam, Ivan A; Nugraha, Fajar C; Wetadewi, Rahmawati I; Surayah, Lutfiah; Nugroho, Adi; Antonius, Sarjiya; Gunawan, Haris
Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Vol 10 No 4 (2020): Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (JPSL)
Publisher : Pusat Penelitian Lingkungan Hidup, IPB (PPLH-IPB) dan Program Studi Pengelolaan Sumberdaya Alam dan Lingkungan, IPB (PS. PSL, SPs. IPB)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jpsl.10.4.668-678

Abstract

Dua dekade terakhir, tata kelola gambut menyebabkan rentannya gambut terhadap kebakaran baik dari aspek degradasi lahan karena drainase, iklim maupun budaya bertani masyarakat. Rewetting adalah upaya mutlak dalam restorasi gambut. Tetapi kebutuhan produksi perlu upaya antara yang mengantarkan gambut terestorasi secara hidrologi, yang mana pengelolaan lahan tanpa bakar merupakan salah satunya. Pengelolaan lahan tanpa bakar di lahan gambut dengan teknologi penyediaan unsur hara secara organik memiliki persyaratan aplikasi ameliorant pada gambut yang basah. Sehingga diperoleh dampak penyediaan unsur hara dengan tidak mengaktifkan mikroogranisme aerob mendekomposisi bahan gambut. Sejalan dengan penataan hidrologi gambut, pertanian di lahan gambut fungsi budidaya perlu memperhitungkan zona air dari kesatuan hidrologi gambut yang luas
Co-Authors , MISNA Adi Nugroho Afriyanti, Dian Ahmad Dani Ardiansyah, Luvan Arif Maulana, Arif Dalimunthe, Muhammad Erpandi Damanik, M. Satria Miranda DAMANIK, RISJUNARDI DANIEL MUDIYARSO, DANIEL DAYANA, SABELLA Defri Yoza DESTI ZARLI MANDARI, DESTI ZARLI Dian Indriyani Dien Septiani Fahlevi, T. Shandy Putra Fitmawati Fitmawati Gea, Daniman Handry Perdana Putra Humam, Ivan A ISKA LESTARI, ISKA KHAIRIJON, KHAIRIJON KOSUKE MIZUNO, KOSUKE Lesmana, Dicky Mayta Novaliza Isda Muhammad Fakhriza, Muhammad Nery Sofiyanti Nugraha, Fajar C OSAMU KOZAN, OSAMU Parlin Siagian Rahmaniar Rahmaniar, Rahmaniar RONNY, ABDUL Sam, Jihan Fadillah Sari Umayah, Sari Sarjiya Antonius Surayah, Lutfiah SYAPUTRA, ARI Tiara Aninditha Wetadewi, Rahmawati I