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All Journal ELPOSYS: Jurnal Sistem Kelistrikan
Hermawan, Satria Luthfi
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Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

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Karakteristik Breakdown Voltage Pada Dielektrik Minyak Mineral dan Minyak Ester Natural Hanifiyah Darna Fidya Amaral; Sungkowo , Heri; Handani, Galuh Prawestri Citra; Hermawan, Ahmad; Hermawan, Satria Luthfi; Ramadhana , Herlambang Kresna Adi; Agustin, Nabilla Dinda Tri
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.6105

Abstract

The increasing demand for electrical energy, driven by population growth and industrial development, necessitates efficient and sustainable power distribution systems. Transformers, essential components of these systems, typically use mineral oil for insulation and cooling, despite its environmental drawbacks, such as high carbon emissions and non-biodegradability. In response, natural ester oils have emerged as eco-friendly alternatives. This study aimed to compare the dielectric breakdown voltage characteristics of mineral oil (Diala B) and natural ester oil (FR3) in transformer applications. The testing followed the IEC 60156 standard, focusing on transformers operating at 20 kV, with a minimum breakdown voltage threshold of 30 kV/2.5mm. Both treated and untreated samples were examined.The results indicated that FR3 ester oil exhibited superior dielectric properties, including higher breakdown voltage, flashpoint, and firepoint, as well as lower carbon emissions compared to mineral oil. These findings suggest that natural ester oil has significant potential as a sustainable replacement for mineral oil, particularly in applications where environmental and safety concerns are prioritized.The study recommends further long-term testing under operational conditions to confirm the performance and stability of ester oil in real-world transformer applications. These findings contribute to the growing body of research supporting the transition to more environmentally friendly transformer insulation materials, which could have broad implications for the power industry’s sustainability efforts
Sistem Pengisian Baterai VRLA 200Ah 24V Pada Pembangkit Listrik Tenaga Surya 6x100 Wp di PPYD Al-Ikhlas, Singosari, Kabupaten Malang Gumilang, Binar Surya Gumilang; Djulihenanto, Saddani; Hermawan, Satria Luthfi; Andinia, Karenina Ledy; Wardania, Yasinta Ika
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.6308

Abstract

The electricity tariff is considered quite high in Indonesia for certain circles. One of them is PPYD Al-Ikhlas, Singosari, Malang Regency who experienced this. To overcome this, an electricity plant originating from solar energy was built at PPYD Al-Ikhlas that has maximum power of 600wp. Solar power plant that generates 24 hours / 7 days a week need battery system for storage the directly unused energy. The battery used is a Solana brand VRLA battery with a capacity of 100Ah/12V in a number of 4 pieces arranged in series-parallel, bringing the total capacity to 200 Ah/24V. Based on this thought, design and build a battery charging system with the aim of determining the components to be used and knowing the performance of the battery charging system. For charging the battery itself, it has become one with inverter hybrid with a capacity of 2400 Watts. From the testing after the installation of the components that have been carried out, the results show that this battery charging system uses a four-stage charging system method. From the data obtained, it can be seen average efficiency is 80,88%. So the efficiency of charging the battery in PLTS is considered good based on the data.
Implementasi Sistem Proteksi Arus dan Tegangan Lebih pada PLTS 10x100 Wp Djulihenanto , Saddani; Saputra, Masramdhani; Hermawan, Satria Luthfi; Akbar, Divac Nabiel; Gumilang, Binar Surya; Putri, Amala Wicaksana
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6849

Abstract

The increasing adoption of solar power systems has highlighted the need for effective overcurrent and overvoltage protection to ensure operational reliability and safety. This study aimed to implement and evaluate a protection system for a 10 × 100 Wp solar power plant at PPYD Al-Ikhlas, Singosari, Indonesia. The research employed an experimental approach, including testing Miniature Circuit Breakers (MCBs), Surge Protection Devices (SPDs), and grounding systems. MCBs were evaluated using an injection current tester to assess their tripping characteristics, while SPDs were tested for continuity using a multimeter. The grounding system was examined with an earth tester to measure its resistance before and after implementing a parallel electrode configuration. The results indicated that the installed protection system significantly enhanced safety, with MCBs effectively disconnecting excessive currents as per IEC 60898-1 standards. The SPD successfully mitigated transient voltage surges, and the grounding system reduced resistance below 5 Ω, complying with PUIL 2020 standards. These findings support previous studies on electrical protection and grounding efficiency, emphasizing the need for tailored solutions in small-scale solar systems. Future research should explore real-time monitoring with IoT-based systems and optimize grounding configurations for high-resistivity soils. The proposed protection approach contributes to enhancing the resilience of distributed solar power installations.
Implementasi Relai Low Impedance Pada Gardu Induk 150 kV Lengkong Lama Hermawan, Ahmad; Harijanto, Priya Surya; Wiguno, Fadhil; Hermawan, Satria Luthfi
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 2 (2025): ELPOSYS vol. 12 no. 2 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i2.7234

Abstract

The substation played a vital role in the distribution of electrical power from the generator to end users, requiring a reliable protection system to ensure continuity and safety. At the 150 kV Lengkong Substation, the existing busbar protection system used an electromechanical high impedance relai, which lacked the sensitivity, selectivity, and reliability demanded by current operational standards. This research aimed to improve the reliability of the substation’s protection system by replacing the high impedance relai with a digital low impedance numerical relai (GE P746). The method involved direct field observation, data collection, and system testing, including individual relai tests, functional evaluations, and differential current calculations. Tap settings and wiring integration were adjusted to accommodate the new relai's configuration and performance standards issued by PT PLN (Persero) UIT JBB. The findings showed that the new relai functioned well in normal operation, block trip, and block all modes. The differential current (Idiff) calculations at Busbar 1 and Busbar 2 yielded 9.32 A and 28.25 A respectively—both well below the 80 A protection threshold, indicating system stability and correct operation. These results confirmed that the upgraded relai system operated within the safe zone and did not trigger false trips. This study highlighted the necessity of modernizing protection systems across substations and recommended further integration with digital communication protocols such as IEC 61850 to enhance future grid reliability and responsiveness.
Co-Authors Agustin, Nabilla Dinda Tri Akbar, Divac Nabiel Amaral, Hanifiyah Darna Fidya Andinia, Karenina Ledy Djulihenanto , Saddani Djulihenanto, Saddani Gumilang, Binar Surya Gumilang, Binar Surya Gumilang Handani, Galuh Prawestri Citra Harijanto, Priya Surya Hermawan, Ahmad Putri, Amala Wicaksana Ramadhana , Herlambang Kresna Adi Saputra, Masramdhani Sungkowo , Heri Wardania, Yasinta Ika Wiguno, Fadhil