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All Journal Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Golden Ratio of Social Science and Education
Dultudes Mangopo
Universitas Cenderawasih
Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Industrial & Manufacturing Engineering Social Sciences Other

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Analysis of Inserted Transformer Installation to Reduce Distribution Transformer Overload at PT PLN (Persero) ULP Abepura, Koya Barat Dultudes Mangopo; Ekawati Margaretha Ohee; Idham Khaliq
Golden Ratio of Social Science and Education Vol. 6 No. 2 (2026): June - November
Publisher : Manunggal Halim Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52970/grsse.v6i2.2263

Abstract

The continuous increase in electrical energy demand, particularly in semi-urban areas, has created significant challenges for the reliability and operational performance of power distribution systems. One critical problem is the occurrence of overload conditions on distribution transformers, which may accelerate insulation degradation, increase thermal stress, and reduce equipment lifespan. This study aims to evaluate the effectiveness of installing an inserted transformer as a technical solution to mitigate overload in the medium-voltage distribution network of PT PLN (Persero) ULP Abepura, Koya Barat. A descriptive quantitative case study approach was employed using field measurement data from the ABE-262 distribution transformer before and after the installation of a 160 kVA inserted transformer. The measured parameters included phase current, voltage profile, transformer loading percentage, phase imbalance, and neutral current during peak load time (WBP) and off-peak load time (LWBP). The results show that the loading of the main transformer decreased from 92.40% to 63.12% during WBP and from 78.94% to 26.56% during LWBP. Meanwhile, the inserted transformer absorbed only 13.32% of the total load during WBP and 9.47% during LWBP, indicating the availability of reserve capacity for future demand growth. The installation also improved phase balance, as shown by the reduction in phase imbalance from 12.4% to 5.6%, and reduced neutral current from 69.7 A to 49.3 A during LWBP. These findings confirm that the inserted transformer is an effective, economical, and practical solution for reducing transformer overload, improving load distribution, and enhancing distribution system reliability. In addition, this strategy provides operational redundancy and reserve capacity, thereby supporting the long-term resilience of distribution networks in areas with limited infrastructure.
Analysis of Voltage Drop and Power Loss Calculations inthe Edelweiss Feeder of PT PLN (Persero) Abepura Customer Service Unit Ekawati Margaretha Ohee; Dultudes Mangopo; Suparno; Oktavianus Kati; Rombe Allo; Semuel Boron Membala; Allo Sarira Pongsapan
Jurnal ASIIMETRIK Jurnal Ilmiah Rekayasa & Inovasi Volume 8 Number 2 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i2.9965

Abstract

This study evaluates the performance of the 20 kV Edelweiss feeder by analysing transformer loading, voltage drop, and technical power losses in a radial distribution network. The analysis is based on a bus-by-bus electrical model derived from feeder topology, conductor impedance, load current, power factor, and segment length data. Voltage profiles and technical losses are quantified using established three-phase power flow relationships based on Ohm’s law and Kirchhoff’s current law, enabling the assessment of cumulative voltage drop and loss propagation along the feeder. The results show that the feeder maintains a highly stable voltage profile, with a total voltage drop of 41.422 V, equivalent to approximately 0.207% of the nominal 20 kV voltage. Total active and reactive power losses are 7.3103 kW and 4.7821 kVAR, respectively, with more than 96% of these losses concentrated in Bus 2 and Bus 3. The findings demonstrate that technical losses are governed primarily by current accumulation, electrical distance, and topological position within the radial network rather than by conductor length alone. This study contributes a feeder-level understanding of how upstream current aggregation shapes voltage-drop and loss distribution, providing empirical evidence for identifying critical segments in medium-voltage radial distribution systems .
Co-Authors Allo Sarira Pongsapan Ekawati Margaretha Ohee Idham Khaliq Oktavianus Kati Rombe Allo Semuel Boron Membala Suparno