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All Journal Jurnal Pengabdian Mandiri ELPOSYS: Jurnal Sistem Kelistrikan
Satria Luthfi Hermawan
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Humanities Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Social Sciences Other

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Evaluasi Ketidakseimbangan Beban Pada Penyulang Unicora Ahmad Hermawan; Ahmad Koimam; Rhezal Agung Ananto; Satria Luthfi Hermawan
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5191

Abstract

Load imbalance in electrical distribution transformers can lead to significant power losses and decreased efficiency in electrical distribution systems. This study focuses on the load imbalance problem at the Unicora feeder of PT PLN (Persero) ULP Singosari, which hinders optimal operational efficiency. The purpose of this research is to evaluate the extent of load imbalance, its impact on power losses, and the effectiveness of load balancing interventions in mitigating these losses. The methodology includes phase load measurements from February to September 2021, analysis of load imbalance, and power loss simulations using ETAP 12.6.0 software. The study's important findings indicate that the average load imbalance decreased from 34% to 21% after implementing load balancing interventions. Concurrently, power losses in the neutral conductor were reduced from 106.3 kW to 78.0 kW. ETAP simulations revealed a total power loss of 773.5 kW in the Unicora feeder, underscoring the significant impact of load imbalance on system efficiency. The implications of this research are crucial for operational practices at PT PLN (Persero) ULP Singosari. The findings demonstrate that effective load balancing can significantly enhance distribution efficiency, reduce operational costs, and improve the reliability of electricity provision. This study advocates for continuous monitoring and adaptive management of load distribution in electrical networks to maintain optimal performance and sustainability.
Evaluasi Kinerja Sistem Proteksi Penyulang Trawas PT. PLN (PERSERO) ULP Pandaan Satria Luthfi Hermawan; Hilman Rangga Nugraha Hermawan; Priya Surya Harijanto; Ahmad Hermawan
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5249

Abstract

The primary objective of this research was to minimize disruptions in the feeder at ULP Pandaan by analyzing the coordination between recloser outgoing and incoming feeders. This study addressed the frequent issue of recloser trips, which caused instability in power supply. The purpose of this research was to provide conclusions and solutions to mitigate these disruptions. The methodology involved a detailed analysis of OCR (Over Current Relay) settings for protective devices on Trawas feeder. This included measurements of primary current settings and TMS (Time Multiplier Setting) values using both standard inverse and normal inverse configurations. Specific settings, such as 25518 A for the Trawas Recloser primary current and a TMS of 0.07, were determined to yield optimal performance. Additional settings for the Outgoing CB (Circuit Breaker) (357061 A, TMS 0.04) and the Incoming CB (181865 A, TMS 1.0) were also established. The important findings revealed that these settings significantly enhanced the reliability of the protective devices, ensuring better coordination between the recloser and CB systems. The implications of this research were substantial, as the optimized settings were expected to reduce the frequency and impact of feeder disruptions. This improvement in system reliability directly benefited both the electricity provider, PT. PLN (Persert), and the consumers by providing a more stable and efficient power supply. In conclusion, this study offered a comprehensive analysis and practical solutions for enhancing the protection system's performance on the Trawas feeder, which could be applied to similar electrical distribution networks to achieve better stability and reliability.
Pengaruh Variasi Proses Annealling Pada Performa Core Losses Trafo 1 Fasa E-I Nurhadi, Slamet; Anang Dasa Nofvowan; Satria Luthfi Hermawan; Binar Surya Gumilang
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.v12i2.7291

Abstract

Transformers have key role in converting voltage level to suit several applications, ranging from industries to residential areas. As part of the local content product production initiated by the government, it is essential to identify the material quality to yield good performance. Therefore, developing a well-designed core material is substantial to prevent excessive transformers core losses during operation. The core losses performance due to the annealing process of the silicon steel core is presented in this research. The E-I core shape is chosen to imitate the existing distribution transformers. The design aims for the optimal core losses of the EI transformers. The design process involves the selection of the iron core and calculating the number of coil turns on the primary and secondary sides. Based on experimental results, under the same number of winding turns, no significant change in transformers impedance due to the annealing process duration. Testing with a nichrome wire load shows that Transformers 1, with a flux density of 1, achieves efficiency and voltage regulation close to 100%. The second test with the addition of a rectifier indicates a decrease in efficiency and regulation, with Transformers 3 and a flux density of 1,6 providing the best results. The research findings show that a smaller flux density in transformer results in better efficiency and regulation for AC output, while a larger flux density supports better efficiency and voltage regulation for DC output. These findings can serve as a guide in designing EI Transformers for optimal battery charging systems.
Kapasitor Shunt Sebagai Korektor Tegangan Bus di Gardu Induk Muhammad Fahmi Hakim; Slamet Nurhadi; Hanifiyah Darna Fidya Amaral; Diktiaz, Aggahra; Amimah, Anggi; Satria Luthfi Hermawan
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (732.277 KB) | DOI: 10.33795/elposys.v10i1.915

Abstract

Segoromadu Substation has two busbars, namely busbar A and busbar B. Busbar A which has nominal voltage of 150 kV has reached a voltage value of 129.38 kV or experienced voltage drop of 13.75%. The percentage of this voltage drop exceeds a predetermined standard. Therefore, it is necessary to design a shunt capacitor which is then modeled and simulated. Based on calculation and analysis result, capacity of shunt capacitor that should be installed on Bus A is 50 MVAR. After the shunt capacitor was installed, based on simulation, there was an increase of 4.87 kV so the voltage afterward became 139.67 kV or only experienced a voltage drop of 3.19%. So, by installing a shunt capacitor with capacity of 50 MVAR, it can increase busbar voltage of the substation. The shunt capacitor also increases the value of reactive power and current flowing to the busbar.
DESAIN PROTEKSI DAN GROUNDING HYBRID PV–HYDRO MENUJU PESANTREN MANDIRI ENERGI Priya Surya H; Bakti Indra Kurniawan; Satria Luthfi Hermawan; Imron Ridzki; Mohammad Noor Hidayat
JURNAL PENGABDIAN MANDIRI Vol. 4 No. 10 (2025): Oktober 2025
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jpm.v4i10.11515

Abstract

Program pengabdian ini berfokus pada isu kemandirian energi dan keselamatan kelistrikan di PPYD Al-Ikhlas, lembaga sosial-pendidikan yang melayani anak yatim dan dhuafa. Tujuannya adalah merancang dan mengimplementasikan sistem proteksi serta pentanahan yang andal pada pembangkit hybrid Photovoltaic (PV)–Hydro, guna meningkatkan keandalan sistem listrik dan mengurangi ketergantungan pada PLN. Pendekatan yang digunakan ialah partisipatif dan teknis-aplikatif, melibatkan komunitas dalam setiap tahap mulai dari analisis kebutuhan, desain sistem proteksi sesuai PUIL dan SNI, instalasi lapangan, hingga pelatihan perawatan sistem. Strategi riset dilakukan melalui pengukuran resistansi tanah, perancangan box proteksi, serta uji kinerja sistem menggunakan metode paralel empat batang elektroda. Hasil pengabdian menunjukkan penurunan resistansi tanah di bawah 5 Ohm, peningkatan keamanan dan efisiensi energi, serta terbentuknya kapasitas teknis komunitas menuju kemandirian energi berkelanjutan berbasis partisipasi sosial.
HYBRID CHARGING STATION UNTUK KEMANDIRIAN ENERGI PETERNAK SAPI PERAH Sigit Setya Wiwaha; Priya Surya Harijanto; Bakti Indra Kurniawan; Satria Luthfi Hermawan; Slamet Nurhadi; Ferdian Ronilaya
JURNAL PENGABDIAN MANDIRI Vol. 4 No. 10 (2025): Oktober 2025
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jpm.v4i10.11516

Abstract

Kegiatan pengabdian ini berfokus pada peningkatan produktivitas dan kemandirian energi peternak sapi perah skala kecil di Desa Kemantren, Kecamatan Jabung, Kabupaten Malang. Isu utama yang dihadapi mitra adalah ketergantungan pada listrik PLN dan penggunaan metode pemerahan manual yang menurunkan efisiensi dan kualitas susu. Tujuan kegiatan ini adalah menyediakan solusi teknologi berupa charging station hybrid berbasis energi PLN dan surya untuk mendukung operasional mesin pemerahan susu portable. Pendekatan yang digunakan melibatkan partisipasi aktif peternak melalui survei kebutuhan, diskusi kelompok terarah, serta pelatihan penggunaan dan perawatan alat. Hasil pengabdian menunjukkan peningkatan efisiensi waktu pemerahan hingga 50%, penurunan beban fisik peternak, dan peningkatan kualitas susu yang berdampak pada peningkatan pendapatan. Program ini berhasil menumbuhkan kemandirian energi dan menjadi model penerapan teknologi terbarukan bagi peternak pedesaan
Co-Authors Ahmad Hermawan Ahmad Koimam Amaral, Hanifiyah Darna Fidya Amimah, Anggi Anang Dasa Nofvowan Ananto, Rhezal Agung Bakti Indra Kurniawan Binar Surya Gumilang Diktiaz, Aggahra Hilman Rangga Nugraha Hermawan Imron Ridzki Mohammad Noor Hidayat Muhammad Fahmi Hakim Nurhadi, Slamet Priya Surya H Priya Surya Harijanto Ronilaya, Ferdian Sigit Setya Wiwaha Slamet Nurhadi