Analisis Penambahan Trafo Sisipan Untuk Mengurangi Beban Lebih Pada Trafo Distribusi

di PT. PLN (Persero) ULP Abepura Penyulang Koya Barat

Abstract

The increasing demand for electricity, especially in semi-urban areas, has posed significant challenges to the reliability of the electrical distribution system. One of the most significant impacts is the occurrence of overloads on distribution transformers, which can accelerate insulation degradation and reduce the operational lifespan of equipment. This study aims to evaluate the effectiveness of installing a booster transformer as a technical solution to reduce overloads on the medium voltage distribution network in the working area of PT PLN (Persero) ULP Abepura. The approach used is a case study based on field data, with direct measurements of the current and voltage profiles of the main transformer (ABE-262) before and after the installation of a 160 kVA booster transformer. The measurement results show a significant reduction in the load on the main transformer from 92.40% to 63.12% under peak load conditions (WBP). Meanwhile, the booster transformer only absorbs 13.32% of the total load, leaving capacity for future load growth. The analysis also shows an improvement in phase balance and a reduction in neutral current, which results in increased power distribution efficiency and reduced energy losses. This study confirms that the implementation of a booster transformer is an effective, economical, and realistic approach to improving the reliability of distribution systems in areas with limited infrastructure. In addition to improving system performance, this strategy also creates operational redundancy and backup capacity that supports long-term network resilience.