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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Elkom: Jurnal Elektronika dan Komputer Jurnal Online Mahasiswa (JOM) Bidang Matematika dan Ilmu Pengetahuan Alam INFOKUM Jurnal Scientia Jurnal Info Sains : Informatika dan Sains Pengabdian Kampus: Jurnal Informasi Kegiatan Pengabdian Pada Masyarakat Jurnal Nasional Teknologi Komputer Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Jurnal Multidisiplin Sahombu Jurnal Ilmu Kehutanan International Journal of Economic, Technology and Social Sciences (Injects) PEDAMAS (Pengabdian Kepada Masyarakat) Journal Serambi Engineering (JSE) Jurnal Informatika Logika
Haris Gunawan
Universitas Riau, Pekan Baru
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Public Health Social Sciences

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Pengaruh Sistem Pencahayaan Berbasis Smart terhadap Penghematan Energi Nafizal Umri; Haris Gunawan; M Erpandi Dalimunthe
JURAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 1 (2026): April: Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i1.7400

Abstract

The increasing demand for electrical energy, particularly in offices and commercial buildings, has made energy efficiency a critical aspect of sustainable development. Among various building components, lighting systems are recognized as one of the major consumers of energy. This study investigates the potential for energy savings through the adoption of a smart lighting system incorporating IoT-based sensors, motion detectors, and dimming controls. Employing a quantitative descriptive approach, the research was conducted at the workspace of Indie Light, comparing energy consumption before and after the implementation of the system. Data were collected using direct observation, light and power meters, and real-time monitoring devices to ensure accurate measurement. The results demonstrate that smart lighting systems can substantially reduce energy use without compromising lighting quality or comfort. By integrating intelligent sensors and adaptive control algorithms, the system not only optimizes energy efficiency but also aligns with national policies on energy conservation, supporting broader environmental sustainability efforts. These findings suggest that smart lighting solutions can play a significant role in promoting energy-efficient practices in commercial spaces while contributing to sustainable development goals.
Algoritma Naive Bayes Untuk Penerimaan Siswa Baru Pada SMK Imelda Medan Haris Gunawan; Raudhah; Tomy Satria Alasi
Jurnal Informatika Logika Vol. 1 No. 2 (2024): Juli
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Methodist Binjai

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Abstract

Penerimaan siswa baru merupakan proses penyeleksian suatu hal yang harus diputuskan dengan cepat dan tepat. penerapan metode Naive Bayes dapat menjadi solusi dengan memprediksi nilai probabilitas. menggunakan nilai-nilai yang dimasukkan, berupa kriteria-kriteria yang dibutuhkan yaitu nilai hasil ujian nasional dan nilai tes dari beberapa bidang studi. Data yang dikumpulkan berupa data siswa baru yang mendaftar pada SMK Imelda Medan. Kriteria yang digunakan untuk penilaian berupa nilai ketrampilan, sertifikat, nilai pengetahuan, nilai ujian saringan masuk. Software yang digunakan menggunakan program Visual Studio 2012 dengan model pemrograman CLI (Command Line Interpreter) Menghasilkan suatu aplikasi klasifikasi data siswa baru pada SMK Imelda Medan menggunakan metode Naive Bayes.
Analisis Korosi pada Elektroda Discharge di Sistem Electrostatic Precipitator (ESP) Pada Boiler dan Pengaruhnya terhadap Kinerja Listrik Bayu Pradana; Siti Anisah; Haris Gunawan
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

The Electrostatic Precipitator (ESP) is a critical component for particulate emission control in industrial boiler systems. ESP performance is strongly influenced by the condition of discharge electrodes, which are responsible for generating corona discharge and gas ionization processes. During long-term operation, the electrodes are exposed to hot flue gas, moisture, and corrosive compounds from shell combustion, leading to corrosion and surface degradation that may reduce electrical performance. This study aims to analyze the corrosion condition of discharge electrodes in an ESP installed on a 24 ton/h palm-shell-fired boiler and its effect on electrical performance, particularly operating voltage and current. The research employed visual inspection of electrode surfaces, interviews with maintenance personnel, and monitoring of electrical parameters from the transformer–rectifier panel before and after mechanical cleaning and surface coating. A comparative analysis was conducted to evaluate performance changes resulting from electrode maintenance. The results indicate that corroded electrodes significantly decreased secondary current and operational stability of the ESP. After cleaning and coating, the secondary current increased by up to 254%, the conduction angle became more stable, and overall ESP performance improved substantially. These findings demonstrate that corrosion mitigation and periodic electrode maintenance are essential for maintaining ESP electrical reliability and effective particulate emission control in industrial boilers.
ANALISIS PORTABEL PLTS SEBAGAI SUMBER ENERGI LISTRIK ALTERNATIF DAN PENERANGAN PADA BUDIDAYA IKAN LELE (STUDI KASUS TERNAK KLAMBIR 5 ) Ricky Adesa Pratama; Haris Gunawan; Zuraidah Taro
Jurnal Nasional Teknologi Komputer Vol 6 No 2 (2026): April 2026
Publisher : CV. Hawari

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Abstract

Keterbatasan akses energi listrik pada sektor perikanan, khususnya budidaya ikan lele, masih menjadi permasalahan utama di beberapa wilayah. Kebutuhan energi listrik diperlukan untuk menunjang penerangan kolam pada malam hari serta pengoperasian sistem pendukung budidaya. Salah satu solusi yang dapat diterapkan adalah pemanfaatan Pembangkit Listrik Tenaga Surya (PLTS) portabel sebagai sumber energi listrik alternatif yang ramah lingkungan dan mandiri. Penelitian ini bertujuan untuk menganalisis kinerja sistem PLTS portabel dalam memenuhi kebutuhan energi listrik untuk penerangan pada budidaya ikan lele. Metode penelitian yang digunakan adalah deskriptif kuantitatif dengan pendekatan studi kasus pada satu lokasi kolam budidaya ikan lele. Sistem PLTS portabel yang dianalisis terdiri dari panel surya berkapasitas 50 Wp, baterai 12 V 5 Ah yang dirangkai menjadi 24 V 10 Ah, solar charge controller, inverter 1000 W, serta beban lampu LED. Parameter yang dianalisis meliputi tegangan, arus, daya keluaran, energi harian, dan kemampuan sistem dalam menyuplai beban penerangan. Pengambilan data dilakukan melalui pengukuran langsung pada rentang waktu pukul 11.00 hingga 16.00 WIB dengan kondisi cuaca cerah. Hasil pengujian menunjukkan bahwa tegangan panel surya berada pada rentang 15,4–20,7 Volt dengan arus maksimum sebesar 2,5 Ampere. Perhitungan daya total sistem menunjukkan nilai sekitar 262,10 Watt, dengan energi listrik harian yang dihasilkan berkisar antara 200–240 Wh. Energi tersebut mampu memenuhi kebutuhan penerangan kolam ikan lele menggunakan lampu LED berdaya total 30 Watt selama ±8 jam. Berdasarkan hasil penelitian, dapat disimpulkan bahwa PLTS portabel layak digunakan sebagai sumber energi listrik alternatif yang efisien, fleksibel, dan berkelanjutan untuk mendukung kegiatan budidaya ikan lele.
Repairing Electrical Power Imbalances on the MDP Panel for Operational Reliability at State Vocational School 1 Stabat Muhammad Ady Pratama; Haris Gunawan; Parlin Siagian
INFOKUM Vol. 14 No. 03 (2026): Infokum, May - June 2026
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v14i03.3093

Abstract

Power imbalance in a three-phase system is a critical issue that can disrupt the operational reliability of equipment, particularly in installations such as SMK Negeri 1 Stabat. This problem was identified in the Main Distribution Panel (MDP) which showed an imbalance in the load between phases (R, S, and T), which caused an increase in the current flowing in the neutral conductor. Current measurements conducted over five days showed a high percentage of imbalance, especially during the day (peak operating hours), with the highest value reaching 26.24% on Tuesday afternoon, far exceeding the ideal limit (generally <10%). The impact of this imbalance is power losses, increased temperatures in cables and transformers, and potential equipment damage. To overcome this problem and improve the reliability of the system, three main improvement solutions were implemented: (1) Replacing the input cable from MDP to several SDPs from 4x16mm² to 3x50mm² + N to adjust the load, (2) Repairing the cable lugs in the SDP panels that were corroded or loose to eliminate voltage losses, and (3) Increasing the school's electrical power from 53 Kva (MCCB 80A) to 66 Kva (MCCB 100A). The implementation of this solution succeeded in reducing the trip frequency on the main MCCB and increasing the operational reliability of the electrical system as a whole.
Analysis of Pick up and Slope Settings of Differential Relays on 60 MVA Power Transformers at Namorambe Substation Muhammad Aditya; Siti Anisah; Haris Gunawan
INFOKUM Vol. 14 No. 03 (2026): Infokum, May - June 2026
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v14i03.3097

Abstract

This study analyzes the pickup and slope settings of differential relays used for the protection of a 60 MVA power transformer at the Namorambe Substation. Differential relays play an important role in detecting internal faults in transformers by comparing the current entering and leaving the protected zone. Improper relay settings may lead to maloperation, reduced system reliability, or failure to isolate faults, which can disrupt power system stability. Therefore, accurate determination of pickup current and slope characteristics is essential to ensure reliable transformer protection performance. The research method used in this study is a quantitative analysis approach based on transformer operational data, current transformer (CT) ratios, nominal transformer capacity, and relay parameter calculations. The pickup setting was determined by calculating the minimum differential current required for relay operation, while the slope setting was analyzed to maintain relay stability during external faults and magnetizing inrush currents. Data analysis was carried out by comparing calculation results with standard relay protection principles and transformer operating conditions. The results show that the selected pickup and slope settings provide effective protection sensitivity while maintaining system stability under normal and fault conditions. The relay is capable of distinguishing internal faults from transient disturbances, thereby minimizing false trips and improving transformer operational reliability. The study concludes that proper differential relay coordination on the 60 MVA transformer at Namorambe Substation significantly enhances protection performance and contributes to the continuity and safety of electrical power distribution systems.
Transformer Life Prediction Analysis Based on Thermal Aging at PT Ultra Sumatera Dairy Farm Wageman A. Naiborhu; Haris Gunawan; Zuraidah Tharo
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

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Abstract

A transformer is a vital component in the electrical power distribution system that functions to transfer energy from medium voltage to low voltage. The reliability of a transformer is highly influenced by the thermal condition of its insulation, which determines its service life. This study aims to predict the effective lifespan of a 1250 kVA distribution transformer at PT. Ultra Sumatra Dairy Farm uses the thermal aging method based on the IEEE C57.91-2011 standard. The data used includes nameplate information, daily load profiles, and average ambient temperature. Based on the measurements, the transformer operates at an average load of 422.7 kVA (33.8% of its rated capacity) and an ambient temperature of 23°C. The calculated results show a hottest-spot temperature of 49.55°C with an aging acceleration factor (FAA) of 0.000649. The daily Loss of Life (LOL) value of 0.00000865% indicates that thermal aging occurs very slowly. Based on the Equivalent Aging Factor (FEQA), the theoretical effective lifespan of the transformer reaches approximately 31,660 years. However, in practice, the actual lifespan of the transformer is estimated to range between 25–35 years due to non-thermal factors such as moisture, oil oxidation, and load fluctuations. These results indicate that the thermal condition of the transformer remains very safe and efficient for long-term operation.
Analysis of the Relationship Between the Percentage of Load Imbalance and Power Losses in Distribution Transformers at PT. PLN (Persero) ULP Binjai Timur Alexius Victor Purba; Haris Gunawan; Dino Erivianto
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

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Abstract

Distribution transformer is one of the most important components in the electric power distribution system. Distribution transformers often experience load imbalance problems. One previous study showed that load imbalance can reach 25.6% which contributes to increased power losses. This study aims to analyze the relationship between the percentage of load imbalance and the power losses incurred at PT. PLN (Persero) ULP East Binjai. This study was conducted with a quantitative approach by calculating the percentage of load imbalance and the resulting power losses. Data were collected through direct observation, voltage and current measurements, then calculations and analysis were carried out. The results showed that a greater percentage of load imbalance occurred at night at 12.96% while during the day at 10.03%. And the resulting power losses occurred at night at 853.3 Watts while during the day at 4,386.3 Watts. Thus, it can be concluded that the greater the percentage of load imbalance, the greater the power losses incurred.
Power Supply System Reliability Analysis at the TVRI Transmitter Station Sibolangit Uses UPS 40 kVa and 250 Kva Mustofa Achyar; Haris Gunawan; Muhammad Erpandi Dalimunthe
Jurnal Info Sains : Informatika dan Sains Vol. 16 No. 02 (2026): Info sains, 2026
Publisher : SEAN Institute

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Abstract

This study aims to analyze the reliability of the power supply system at the Sibolangit TVRI Transmitter Station which uses Uninterruptible Power Supply (UPS) with a capacity of 40 kVA and 250 kVA as an important component in maintaining the operational continuity of the transmitter. A reliable power supply system is crucial to ensure broadcast quality and prevent service disruptions due to power supply failures. The methods used in this study include collecting UPS operation data through field monitoring, analyzing technical parameters such as Mean Time Between Failure (MTBF), Mean Time To Repair (MTTR), Availability, and comparing the performance of the two UPS units. Data were analyzed using statistical approaches and reliability engineering tools to evaluate the performance and failure patterns that occurred during the observation period. The results show that the 250 kVA UPS has a higher level of availability than the 40 kVA UPS, with an average MTBF value of XX hours and YY hours, respectively, and MTTR of AA hours and BB hours. The analysis also reveals the main factors that affect reliability, including the quality of the electricity supply from PLN, load conditions, and the implemented maintenance schedule. These findings provide technical recommendations regarding load management, improved preventive maintenance schedules, and risk mitigation strategies to improve power supply continuity, particularly for low-capacity UPS units. Thus, this study contributes to the understanding of power supply system reliability in broadcasting installations and provides a basis for planning for improving operational performance at the TVRI Sibolangit transmitter station.
Co-Authors Abdi Nazirwan Ahmad Dani Alasi, Tomy Satria Alexius Victor Purba Andi Krismanto M. David Panggabean Aos Yuli Firdaus Bayu Pradana Beno Fariza Syahri Cakra Birawa Dewi Victorya Nuralda Dian Afriyanti Dian Eka Indriani, Dian Eka Dicky Lesmana Dien Septiani Dwi Adhari Nugraha Edo Inaldi Damanik Emmy Uthanya Antang Ernawati Sinaga Erwanda Trio Bintan Sabri Fachruddin Mangunjaya, Fachruddin Faisal Arrasyid Pulungan Fauziah Ilmi Gugah Praharawati Hafist Aufar Hamdani Ahmad Rangkuti Hendra Maujana Saragih Herawati Sudoyo Jembar Khairijon &#039; Kholaful Ahmad Harahap Lilis Supriati M Erpandi Dalimunthe Mhd Hasbi Ramadhan Muhammad Aditya Muhammad Ady Pratama Muhammad Erpandi Dalimunthe Mustofa Achyar Nafizal Umri Nery Sofiyanti Nico Herlambang Parlin Siagian Rahmaniar Ranses Wahyudi Sijabat Raudhah Rianto Wijaksana Silalahi Ricky Adesa Pratama Salampak Dohong Sigit Pratama Sinamo, Alfonsus Siti Anisah Suwigya Utama Tanzil Al Malik Taufik Mei Mulyana Tengku Mughayat Syah Falah Wageman A. Naiborhu Yeprin Ari Pradana Yoel Wesly Dirney Lumbantoruan Yolanda Yussy Zulham, Muhammad Zuraidah Taro Zuraidah Tharo