Koordinasi Proteksi Arus Lebih Pada Pabrik 2 PT Pupuk Kalimantan Timur Akibat Gangguan Yang Menyebabkan Blackout

Prasetiya, Dermawan Eka (2025) Koordinasi Proteksi Arus Lebih Pada Pabrik 2 PT Pupuk Kalimantan Timur Akibat Gangguan Yang Menyebabkan Blackout. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT Pupuk Kalimantan Timur merupakan perusahaan petrokimia yang menyediakan pupuk dan bahan kimia untuk sektor pertanian. Berdasarkan kasus pada Pabrik 2 PT Pupuk Kalimantan Timur, terjadi gangguan hubung singkat pada Load Breaker Switch (LBS) transformator feeder 8 menyebabkan aliran arus gangguan dari generator dan jaringan integrasi menuju titik gangguan. Kenaikan arus tersebut mengakibatkan perangkat proteksi Is-Limiter yang menghubungkan Pabrik 2 dengan jaringan integrasi collapse karena waktu operasi yang lebih cepat dibandingkan rele. Rele proteksi arus lebih R BKR 8 dan R GTG P2 tidak bekerja sesuai standar waktu dan bekerja bersamaan karena rele cadangan 51V R GTG P2 trip akibat penurunan tegangan pada Switchgear 1, sehingga mengakibatkan blackout pada Pabrik 2 dan keseluruhan pabrik. Oleh karena itu, perlu dilakukan setting rele dan koordinasi proteksi pada sistem kelistrikan. Hal ini bertujuan untuk menghasilkan koordinasi proteksi yang dapat mengisolasi gangguan arus lebih. Pada tugas akhir ini, dilakukan analisis kerja sistem koordinasi proteksi Existing arus lebih gangguan fasa dan rele arus lebih gangguan tanah. Dari hasil analisis, Is-Limiter dan rele 51V R GTG P2 tidak perlu digunakan, serta didapatkan re-setting rele arus lebih yang memiliki selektivitas dan terkoordinasi sesuai dengan standar CTI yang dapat mengisolasi gangguan secepat mungkin untuk menjaga keandalan sistem kelistrikan Pabrik 2 PT Pupuk Kalimantan Timur.
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PT Pupuk Kalimantan Timur is a petrochemical company that supplies fertilizers and chemicals for the agricultural sector. Based on a case study at Plant 2 of PT Pupuk Kalimantan Timur, a short-circuit fault occurred on the Load Breaker Switch (LBS) of transformer feeder 8, causing fault current to flow from the generator and the integrated network to the fault point. The rise in current caused the protection device Is-Limiter, which connects Plant 2 to the integrated network, to collapse due to its faster operating time compared to the relay. The overcurrent protection relays R BKR 8 and R GTG P2 did not operate according to the standard time and tripped simultaneously, as the backup relay 51V R GTG P2 was triggered due to a voltage drop at Switchgear 1. This resulted in a blackout at Plant 2 and the entire facility. Therefore, relay setting and protection coordination need to be implemented in the electrical system. This aims to produce protection coordination capable of isolating overcurrent faults. This final project analyzes the performance of the Existing protection coordination system for phase and ground fault overcurrent relays. The analysis results indicate that the Is-Limiter and the 51V R GTG P2 relay are unnecessary, and new overcurrent relay settings with selectivity and coordination according to CTI standards are proposed to isolate faults quickly and maintain the reliability of the electrical system at Plant 2 of PT Pupuk Kalimantan Timur.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Is-Limiter, 51V, Blackout, Koordinasi Proteksi, Arus Lebih, Is-Limiter, 51V, Blackout, Protection Coordination, Overcurrent
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays. Protective relays--Security measures.
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Dermawan Eka Prasetiya
Date Deposited:	28 Jul 2025 01:14
Last Modified:	28 Jul 2025 01:14
URI:	http://repository.its.ac.id/id/eprint/121444

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