Analisis Gangguan Tegangan Pada Sistem Distribusi di Unit Fertilizer PT. Agri Indomas (Wilmar group

HIDAYAT, REYNALDO RIZKY (2026) Analisis Gangguan Tegangan Pada Sistem Distribusi di Unit Fertilizer PT. Agri Indomas (Wilmar group. S-1 thesis, 021008 Universitas Tridinanti.

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Abstract

ABSTRAK Penelitian ini bertujuan untuk menganalisis karakteristik dan penyebab gangguan tegangan pada sistem distribusi listrik di Unit Fertilizer PT. Agri Indomas (Wilmar Group), khususnya dampak proses starting motor berdaya besar terhadap stabilitas tegangan sistem. Metode penelitian dilakukan melalui pengukuran langsung di lapangan untuk mengambil data parameter elektrik operasional motor (Drum Cooler, Dryer Drum, Granulator, dan Belt Conveyor), yang meliputi daya, faktor daya (cos φ), tegangan antar fasa, arus mula (inrush current), dan penurunan tegangan sesaat (voltage dip), kemudian membandingkannya dengan standar keandalan sistem tenaga listrik. Hasil pengujian menunjukkan bahwa proses starting motor induksi berdaya besar memicu lonjakan arus mula yang sangat tinggi, dengan arus tertinggi mencapai 1780 A pada Dryer Drum (dari arus nominal 295 A). Lonjakan arus ini menyebabkan terjadinya gangguan kedip tegangan (voltage dip), dengan nilai terbesar mencapai 7,5% pada Drum Cooler dan tegangan antar fasa terendah jatuh di angka 380 V (pada fasa V-T). Berdasarkan standar IEEE 1159 / IEEE 493 dan SPLN (Standar PLN), batasan voltage dip yang diizinkan untuk kategori sag ringan adalah maksimal 10%, sehingga jatuh tegangan sesaat sebesar 7,5% ini dinilai masih aman dan memenuhi standar persyaratan. Namun, nilai faktor daya (cos φ) operasional motor yang berada di rentang 0,82 – 0,86 menunjukkan perlunya optimasi capacitor bank agar tetap memenuhi regulasi PUIL 2020 dan ketentuan PLN (minimal 0,85) guna menghindari penalti daya reaktif. Kata Kunci: Voltage Dip, Inrush Current, Sistem Distribusi, IEEE 1159, PUIL 2020. ABSTRACT This study aims to analyze the characteristics and causes of voltage disturbances in the electricity distribution system at the Fertilizer Unit of PT. Agri Indomas (Wilmar Group), specifically the impact of starting high-power motors on system voltage stability. The research method used direct field measurements to collect data on the motors' operational electrical parameters (Drum Cooler, Dryer Drum, Granulator, and Belt Conveyor), including power, power factor (cos φ), phase-to-phase voltage, inrush current, and voltage dip. These data were then compared to power system reliability standards. Test results showed that starting high-power induction motors triggered very high initial current surges, with the highest current reaching 1780 A in the Dryer Drum (from a nominal current of 295 A). These current surges caused voltage dips, with the highest value reaching 7.5% in the Drum Cooler and the lowest phase-to-phase voltage dropping to 380 V (in the V-T phase). Based on the IEEE 1159/IEEE 493 and SPLN (State Electricity Company) standards, the permissible voltage dip limit for the light sag category is a maximum of 10%, so this momentary voltage drop of 7.5% is considered safe and meets the required standards. However, the motor's operational power factor (cos φ) value, which is in the range of 0.82–0.86, indicates the need for capacitor bank optimization to comply with PUIL 2020 regulations and PLN requirements (minimum 0.85) to avoid reactive power penalties. Keywords: Voltage Dip, Inrush Current, Distribution System, IEEE 1159, PUIL 2020

Item Type:	Thesis (S-1)
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering
Divisions:	Fakultas Teknik > S1 Teknik Elektro
Depositing User:	Tn REYNALDO RIZKY HIDAYAT
Date Deposited:	22 Oct 2026 05:55
Last Modified:	22 Oct 2026 05:55
URI:	http://repository.univ-tridinanti.ac.id/id/eprint/11631

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