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All Journal Elektrika Borneo Buletin Poltanesa Eduvest - Journal of Universal Studies
Marwan Rosyadi
Institut Teknologi PLN
Aerospace Engineering Agriculture, Biological Sciences & Forestry Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Health Professions Industrial & Manufacturing Engineering Neuroscience Social Sciences

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Development of Off-Grid Solar Power Plant Model and Monitoring System for Renewable Energy Education Eliza; Marwan Rosyadi
Poltanesa Vol 26 No 2 (2025): December 2025
Publisher : P3KM Politeknik Pertanian Negeri Samarinda

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The increasing demand for energy has accelerated the need for sustainable and eco-friendly alternatives, including the adoption of off-grid Solar Power Systems (PLTS). This study aims to evaluate the performance of a 1.2 kWp off-grid photovoltaic solar power system and to develop an Internet of Things (IoT)–based monitoring system as an educational tool for renewable energy learning at SMKN 1 Majalaya. The system is constructed using six 200 Wp solar modules, a 12 V 100 Ah VRLA battery, a 1000 W inverter, and two types of solar charge controllers, namely PWM and MPPT. For monitoring purposes, an ESP32 microcontroller integrated with a PZEM-004T sensor is employed to measure voltage, current, power, and energy in real time through a web-based dashboard. The testing results indicate that daily energy production ranges from 4.84 to 5.08 kWh, with an overall system efficiency of approximately 84.5%. The IoT-based monitoring system demonstrates stable and accurate data acquisition, consistent with manual measurements and simulation results using Helioscope and GSA. The off-grid PLTS system effectively supplies power for light to medium electrical loads, making it suitable for practical applications in educational environments. Furthermore, the integration of IoT technology enhances students’ understanding of renewable energy systems, performance analysis, and digital monitoring techniques. Overall, this system not only serves as a functional alternative energy source but also provides a valuable and innovative learning resource for developing students’ competencies in future energy technologies.
Optimization Of Cogging Torque in 28-Pole 24-Slot Permanent Magnet Generator Zacky Irfan Al Farisie; Tajuddin Nur; Marwan Rosyadi; Syamsir Abduh
Eduvest - Journal of Universal Studies Vol. 6 No. 4 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i4.52888

Abstract

This study addresses the growing demand for efficient renewable energy conversion systems, particularly in low- to medium-wind-speed regions such as Indonesia, where wind resources typically range between 4–6 m/s. Permanent magnet generators (PMGs) are widely used in wind power plants due to their high efficiency and simple structure; however, their performance is often limited by cogging torque, which causes rotational resistance, vibration, and reduced energy conversion efficiency. This research aims to analyze and optimize the reduction of cogging torque in a 28-pole, 24-slot permanent magnet generator through geometric modification techniques. The study employs a quantitative simulation approach using FEMM 4.2 software and LUA 4.0 scripting to model magnetic flux distribution and torque characteristics. The optimization process includes variations in air gap widening, magnet edge shaping, slot opening adjustment, and the addition of dummy slots. The initial design produced a cogging torque of 0.00498 Nm. After the first optimization stage, the value decreased to 0.00028 Nm, while the second optimization achieved a significant reduction to 0.00005 Nm, corresponding to a 98.99% decrease. The results demonstrate that combining magnet edge shaping with dummy slots is highly effective in minimizing cogging torque and improving flux uniformity. In conclusion, the optimized design enhances generator performance, particularly in low-speed wind applications, making it a promising solution for sustainable energy development.
KAJIAN KELAYAKAN CONDITION BASE MAINTENANCE TERHADAP INTERVAL OVERHAUL TM2500 PT PLN BATAM Arif Budiman; Syamsir Abduh; Marwan Rosyadi
Elektrika Borneo Vol 12, No 1 (2026): Elektrika Borneo Edisi April
Publisher : Jurusan Teknik Elektro, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/eb.v12i1.7267

Abstract

Inefisiensi biaya operasional akibat ketidakselarasan strategi pemeliharaan dengan degradasi aktual aset menjadi tantangan kritikal pada turbin gas aero-derivatif di sistem isolated grid. Praktik konvensional Time-Based Maintenance (TBM) yang memberlakukan interval overhaul kaku setiap 12.500 jam sering kali memicu over-maintenance, karena mengabaikan variabilitas kondisi termodinamika dan integritas mekanikal mesin. Penelitian ini mengusulkan transisi strategis menuju Condition-Based Maintenance (CBM) melalui pengembangan "Algoritma Gatekeeper" yang mengintegrasikan parameter termodinamika kritis (T48, PS3) dengan validasi visual langsung melalui Borescope Inspection (BSI). Pendekatan ini menempatkan data visual sebagai penentu akhir dalam keputusan ekonomi, memastikan keamanan teknis sebelum eksploitasi nilai ekonomi aset dilakukan. Melalui analisis tekno-ekonomi (Cost-Benefit Analysis) pada armada 20 unit TM2500 di PT PLN Batam, strategi ini terbukti mampu menghasilkan efisiensi signifikan. Hasil simulasi menunjukkan potensi penghematan biaya langsung sebesar USD 5.614.431 per tahun dengan nilai Benefit-Cost Ratio (BCR) mencapai 2,36. Temuan ini mengimplikasikan bahwa integrasi BSI dalam kerangka CBM bukan hanya meningkatkan reliabilitas, tetapi juga menetapkan standar manajemen aset baru yang adaptif dan efisien secara finansial.
Co-Authors Arif Budiman Eliza Syamsir Abduh Tajuddin Nur Zacky Irfan Al Farisie