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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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Journal : INFOKUM

 1 
Analysis of Solar Power System Planning For Street Lighting SUPPLY at Campus I Universitas Pembangunan Panca Budi Medan Mhd Hasbi Ramadhan; Haris Gunawan; Dicky Lesmana
INFOKUM Vol. 13 No. 04 (2025): Infokum
Publisher : Sean Institute

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Abstract

Solar energy is a renewable energy source (EBT) that will not run out. One of the uses of solar energy is as a source of energy for solar-powered public street lighting (PJUTS). Public street lightingCampus Area of Panca Budi Development Universityaims to help improve road safety at night. In this study, planning will be carried out for solar-powered Public Street Lighting (PJUTS) located inCampus Area of Pancasila Development Universitywith a road width of 5 m and a road length of 320 m. Planning for solar-powered public street lighting (PJUTS) requires 14 lighting points with a load of 24 Watt LED lights. With a pole height of 7 m and a distance between poles of 25 m, the lighting intensity is 6.72 lux for manual calculations. Meanwhile, according to applicable standards, the lighting intensity value is 3-7 lux. The solar module used has a capacity of 75 Wp. PJUTS operates 12 hours a day and is able to continue operating for 3 days without a solar energy source. The total cost that must be incurred for this solar-powered public street lighting is IDR 1,224,500,000
Analysis of Coal Feeder Motor Performance Under the Influence of Frequency Fluctuations at PLTU Pangkalan Susu Hafist Aufar; Haris Gunawan; Siti Anisah
INFOKUM Vol. 13 No. 04 (2025): Infokum
Publisher : Sean Institute

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The coal feeder motor is a three-phase induction motor whose speed is regulated by the Variable Speed Drive (VSD). The coal feeder motor functions as a medium for distributing coal fuel to the combustion chamber in the boiler which aims for the combustion process in heating water on the pipe wall (wall tube) which will be used as steam to drive the turbine. Before supplying coal, first pay attention to the amount of coal entering the coal feeder, because it will affect the coal flow and motor performance. The more coal that enters the coal feeder, the greater the coal flow, just as the high speed of the motor will increase the flow of coal entering the furnace. From the research results, the calculation of the change in motor speed to the torque of the coal feeder motor at a speed of 115.2 rpm obtained a torque of 7.88 Nm, at a speed of 144 rpm obtained a torque of 6.68 Nm, at a speed of 230.4 rpm obtained a torque of 5.33 Nm and at a speed of 288 rpm obtained a torque of 4.48 Nm%. at a speed of 115.2 rpm an efficiency of 31.05% was obtained, at a speed of 144 rpm an efficiency of 29.55% was obtained.
Analysis Of Power Requirements and Solar Power Plant (PV System) Components For an Electric Vehicle Charging Station at Universitas Pembangunan Panca Budi Medan Hamdani Ahmad Rangkuti; Dicky Lesmana; Haris Gunawan
INFOKUM Vol. 13 No. 04 (2025): Infokum
Publisher : Sean Institute

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This study focuses on determining the capacity of the solar power plant (PLTS) components used as an energy source at a public electric vehicle charging station (SPKLU) to charge the batteries of electric cars at Universitas Pembangunan Panca Budi Medan. Calculations are carried out to obtain the area of the solar module, the power required, the number of solar panels, the SCC capacity, the backup battery, and the charging time of the electric vehicle. The research method used is a research method with an approach calculation by comparing several similar references related to planning in building a PLTS. The battery data collection method is carried out by observation, literature study and collection of weather condition data through the BMKG of Medan City. The results of the study show that with a solar intensity of Gav 4.42 kWh/m2/day, a module array area of 42,071 m2 is required. With a sunlight intensity of 1000 W/m2, the power generated by the area is 6,731 Wp. By using a 120 WP solar module, the number of panels used is 60 units consisting of 15 strings of 4 units in each string. The system can produce 8,333 Wp, 71 V 103 A of power. The SCC produces 128.73 A. The charging time required is 8.63 hours or 8 hours 37 minutes.
Current Analysis of Automatic Charger and Transformer During Emergency Household Battery Charging Edo Inaldi Damanik; Haris Gunawan; Siti Anisah
INFOKUM Vol. 13 No. 04 (2025): Infokum
Publisher : Sean Institute

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Abstract

Electricity is a very important need, especially in the field of information technology development, educational facilities and households. The application of alternative electrical energy sources as backup energy by utilizing DC (direct current) energy sources from batteries (accu) which are converted through circuit stages so that they can be used as AC (Alternating current) backup energy sources. PLN electricity used to charge the battery (charge) through a step down transformer to 24Vac then rectified through a rectifier circuit in the form of a bridge rectifier aims to rectify the AC voltage to a DC voltage of 24Vdc to charge the 24Vdc battery. This automatic charger test aims to obtain the performance of the circuit that will cut off the charging current at a voltage of 13.5V on a 12V battery with a capacity of 5AH automatically when the battery is fully charged. Where the battery input comes from the rectifier output of 13.5V and the battery output will be used as input from the inverter. Before the automatic Charger circuit is connected to the battery, the battery input voltage is set at 11.5Vdc. Charging the charger produces a voltage of 13.5 volts with a maximum charging current of 1.17Amperes with a charger time of 2.5 hours, the charging process from a voltage of 11.5 Volts increases to 13.5 Volts. The temperature of the battery when charging must also be monitored so that there is no excessive heat that can damage the battery cells which reduces the life of the battery.
The Effect of Coil Winding Replacement on the Performance of a 200 Kva Transformer (Case Study at PT. Razza Prima Trafo) Tengku Mughayat Syah Falah; Haris Gunawan; Parlin Siagian
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

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Abstract

The electric power system is a primary need, both for daily life and for industrial life. The provision of stable and continuous electric power is an absolute requirement that must be met in meeting the need for electric power. The distribution system is the distribution of electrical energy from the substation to consumers. There are 2 (two) distribution systems, namely primary distribution and secondary distribution. Primary distribution, the distribution starts from the substation (secondary side of the power transformer) to the distribution substation (primary side of the distribution transformer) or from the substation directly to the 20kV medium voltage consumer. Power transformers are equipped with a grounding transformer that functions to obtain a neutral point from the power transformer. Before replacing the coil winding, measurements were taken using a TTR transformer turn ratio test (megger) measuring instrument. It can be concluded that the location of the damage is in the coil winding section. The results of the voltage measurements on the Primary Winding between phases R-S = 410 V, ST phase = 407 V and TR phase = 375V. and the Secondary voltage between phase and Neutral is RN = 221V, SN = 237V and TN = 222V. and the current in the Secondary winding between phases is R = 7.64A, S phase = 7.64A and T phase = 8.08A.
Analysis of the Performance Evaluation Study of Generator Excitation Unit in Atik Bakery Factory Kholaful Ahmad Harahap; Parlin Siagian; Haris Gunawan
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

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Abstract

Atik Bakery uses a power generation system to meet its operational energy needs, one of which comes from a generator unit that plays an important role in maintaining a stable power supply. One of the key components in generator operation is the excitation system that functions to regulate the generator output voltage. This study aims to evaluate the performance of the generator unit excitation system at Atik Bakery, by analyzing efficiency, voltage stability, and response to changes in load. The methods used include measuring the generator output voltage at various load conditions, as well as monitoring the parameters of the excitation system using measuring devices and data analysis. The results of the study indicate that the generator unit excitation system can maintain a stable output voltage under normal load conditions, but there is a decrease in performance at higher loads, which can affect the quality of power supply to the factory. This evaluation provides a basis for efforts to improve and enhance the performance of the excitation system to improve operational efficiency and stability at Atik Bakery.
Improving 20 kVA Generator Power Performance by Rewinding the Stor Conductor Windings Rianto Wijaksana Silalahi; Parlin Siagian; Haris Gunawan
INFOKUM Vol. 13 No. 05 (2025): Infokum
Publisher : Sean Institute

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Abstract

The decline in power performance in generators can be caused by various factors, one of which is the degradation of the stator conductor windings due to age, excessive temperature, or unstable operational conditions. This study aims to analyze and improve the power performance of a 20 kVA generator through the rewinding process of the stator windings with new conductors that meet technical standards. In this study, the methods used include initial analysis of the condition of the old windings, planning the winding redesign, the rewinding process, and testing the results through measuring voltage, current, efficiency, and power factor. The test results show a significant improvement in generator performance parameters after the rewinding process. The output voltage becomes more stable, power losses decrease, and efficiency increases from 0% to 80%. In addition, the power factor has improved from 0 to 0.92. This improvement proves that the rewinding process with the right material and technical specifications can restore and even significantly improve generator performance. This study makes a real contribution to the maintenance and reconditioning of electrical equipment, especially in small-to-medium scale power generation systems.
Analysis of Solar Power Plant Planning for Lighting Dragon Fruit Orchards in Silimakuta Village, Pakpak Bharat Sinamo, Alfonsus; Muhammad Erpandi Dalimunthe; Haris Gunawan
INFOKUM Vol. 13 No. 06 (2025): Infokum
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/infokum.v13i06.2968

Abstract

The use of electrical energy as a lighting source in dragon fruit orchards in remote areas such as Silimakuta Village often faces challenges due to limited access to electricity from the state electricity company (PLN). Therefore, efficient and sustainable alternative energy sources are needed, one of which is through Solar Power Plants (PLTS). This study aims to calculate the power requirements and capacity of the PLTS system required to meet lighting needs in dragon fruit orchards. The research problem formulation includes how to calculate the power requirements of a PLTS system and the required power capacity. The problem definition focuses on calculating the power requirements of each component and the amount of power generated by the system to determine the number of solar modules. The research method used was to calculate the power consumption of lighting lamps, system efficiency, and the potential solar irradiation in the area. The results show that a PLTS system with a certain capacity can optimally meet nighttime lighting needs. This research provides benefits in the form of appropriate PLTS system planning, battery capacity calculations, and the utilization of renewable energy to support sustainable lighting systems in the agricultural sector.
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.
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