Ketidakseimbangan Beban Pada Gardu Distribusi PI0483 Penyulang Merapi di PLN ULP Indralaya
DOI:
https://doi.org/10.32502/jse.v11i1.2474Keywords:
Load Imbalance, Neutral Current, Distribution Transformer, Apparent Power, FeederAbstract
Load imbalance in a three-phase four-wire system can increase neutral current, conductor heating, and reduce utilization of distribution equipment. This study aims to: (1) determine the level of current imbalance and compare measured neutral current with the theoretical resultant; (2) calculate the apparent power associated with neutral current and its percentage relative to transformer capacity; and (3) determine load-balancing priorities based on electrical indicators. A quantitative descriptive case-study approach was applied using secondary data from the PI0483 Distribution Substation on the Merapi Feeder in Indralaya. The 100 kVA transformer supplies two circuits, with R-S-T phase currents of 26-15-16 A for Circuit I and 71-85-38 A for Circuit II. The results show imbalance levels of 24.56% and 27.49%, respectively. Measured neutral currents were 13 A and 47 A, while theoretical values were 10.54 A and 41.80 A. At an average phase-to-neutral voltage of 234 V, the apparent power associated with neutral current was 12.25 kVA based on calculated currents and 14.04 kVA based on measured currents, equivalent to 12.25%-14.04% of transformer capacity. Circuit II is prioritized for load balancing because of its higher imbalance, neutral current, phase-current range, and neutral-current apparent power. These findings highlight the importance of load redistribution and monitoring.
References
Aminullah, M. W., Putra, L., Gumilang, A. G., & Hurairah, M. (2026). Pengaruh Variasi Pembebanan Pada Kinerja Transformator 60 MVA di PT. PLN Gardu Induk Keramasan. Jurnal Surya Energy, 10(2), 92–98. https://doi.org/10.32502/jse.v10i2.1619
Badan Standardisasi Nasional (BSN). (2020). SNI 0225-2:2020 Persyaratan Umum Instalasi Listrik (PUIL) 2020 - Bagian 2: Desain instalasi listrik. Badan Standardisasi Nasional.
Chang, C.-K., Cheng, S.-T., & Boyanapalli, B.-K. (2022). Three-Phase Unbalance Improvement For Distribution Systems Based On The Particle Swarm Current Injection Algorithm. Energies, 15(9), 3460. https://doi.org/10.3390/en15093460
Guo, G., Zhan, X., Wang, J., Liu, Z., Feng, K., Peng, F., Gong, D., Tang, A., Xiang, C., & Wang, Z. (2024). Research On The Three-Phase Load Imbalance Control Of The Active Distribution Network Based On The Distributed Power Flow Controller. Frontiers in Energy Research, 12, 1414084. https://doi.org/10.3389/fenrg.2024.1414084
León-Martínez, V., Peñalvo-López, E., Montañana-Romeu, J., Andrada-Monrós, C., & Molina-Cañamero, L. (2023). Assessment Of Load Losses Caused By Harmonic Currents In Distribution Transformers Using The Transformer Loss Calculator Software. Environments, 10(10), 177. https://doi.org/10.3390/environments10100177
Nkinyam, C. M., Encho, L. T., & Mbaka, N. E. (2025). Design and Implementation of a 100 Kva Transformer Monitoring and Fault Detection System for Distribution Network. Journal of Electrical Systems and Information Technology. https://doi.org/10.1186/s43067-025-00213-0
Novfowan, A. D., Mieftah, M., & Kusuma, W. (2023). Alternatif Penanganan Losses Akibat Ketidakseimbangan Beban Pada Trafo Distribusi. ELPOSYS: Jurnal Sistem Kelistrikan, 10(1), 54–56. https://doi.org/10.33795/elposys.v10i1.716
Patilima, M. (2022). Pengaruh Ketidakseimbangan Beban Terhadap Losses Dan Pembebanan Transformator Distribusi. Jurnal Electrichsan, 11(1), 20–28. https://doi.org/10.37195/electrichsan.v11i01.85
Prayoga, A. B., & Suprianto, B. (2023). Analisis Pengaruh Ketidakseimbangan Beban Pada Transformator Distribusi Terhadap Rugi Daya (Losses) dengan DIgSILENT PowerFactory di PT PLN (Persero) ULP Ngunut. Jurnal Teknik Elektro, 12(2), 23–32. https://doi.org/10.26740/jte.v12n2.p23-32
Rizky, R. T. G., Zulfahri, Z., & Arlenny, A. (2022). Analisis Ketidakseimbangan Beban Jaringan Distribusi Tegangan Rendah Menggunakan ETAP. SainETIn, 6(2), 81–89. https://doi.org/10.31849/sainetin.v6i2.9648
Siregar, A. P., Tarigan, A. D., & Lubis, Z. (2024). Analisis Ketidakseimbangan Beban Akibat Penghantar Netral Jaringan Distribusi Sekunder. Power Elektronik: Jurnal Orang Elektro, 13(3), 298–301. https://doi.org/10.30591/polektro.v13i3.6967
Sutama, I. W., & Sari, I. A. L. N. (2023). Analisis Ketidakseimbangan Beban pada Gardu Distribusi KA 0251 Penyulang Gelogor Carik. Jurnal Ilmiah Telsinas, 6(2), 209–218. https://doi.org/10.38043/telsinas.v6i2.4893
Thango, B. A., & Bokoro, P. N. (2022). Stray Load Loss Valuation In Electrical Transformers: A review. Energies, 15(7), 2333. https://doi.org/10.3390/en15072333
Yasa, I. W. S., Wirajaya, A., & Adrama, I. N. (2024). Analisis Ketidakseimbangan Beban Pada Transformator Distribusi di PT PLN (Persero) ULP Bangli. Journal of Electrical and System Control Engineering, 8(1), 141–154. https://doi.org/10.31289/jesce.v8i1.11992
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2026 Daeny Septi Yansuri, Armin Sofijan, Subianto Subianto, Siti Sailah, Dwi Pratiwi, Anisah Harum Sari
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.
