Studi Koordinasi Proteksi Arus Lebih Akibat Penambahan Beban LCO2 Dan Generator Turbin Gas 1 x 15 MW Pada PT Kaltim Parna Industri

Sutomo, Ahmad Raffi Romanov (2026) Studi Koordinasi Proteksi Arus Lebih Akibat Penambahan Beban LCO2 Dan Generator Turbin Gas 1 x 15 MW Pada PT Kaltim Parna Industri. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Keandalan sistem kelistrikan merupakan faktor krusial dalam menunjang kegiatan produksi di PT Kaltim Parna Industri (KPI). Adanya rencana penambahan beban LCO2 dan Gas Turbine Generator (GTG) 1 x 15 MW akan mengubah konfigurasi sistem kelistrikan, sehingga berpotensi menyebabkan masalah pada koordinasi sistem proteksi yang ada. Studi ini bertujuan untuk melakukan analisis perancangan sistem proteksi pabrik baru serta mengoptimalkan kembali koordinasi relai arus lebih (overcurrent relay dan ground fault relay) pada sistem kelistrikan PT KPI setelah adanya penambahan beban tersebut. Penelitian ini dilakukan dengan analisis sistem kelistrikan yang meliputi simulasi aliran daya dan arus hubung singkat menggunakan perangkat lunak simulasi sistem tenaga listrik. Hasil analisis dijadikan acuan dalam menentukan parameter setting relai dan koordinasi proteksi yang divisualisasikan dan dievaluasi melalui plot kurva Time Current Characteristic (TCC). Hasil evaluasi sistem eksisting menunjukkan adanya potensi sympathetic tripping dan false tripping akibat batas pickup yang kurang tepat dan margin Coordination Time Interval (CTI) yang tidak sesuai standar. Setelah dilakukan re-setting, urutan tripping time antar-relai berhasil dikoordinasikan secara optimal dengan capaian margin CTI sebesar 0,2 - 0,4 detik sesuai standar IEEE 242-2001. Selain pembaruan setting relai, studi ini juga merekomendasikan retrofit kapasitas Current Transformer (CT) dan Molded Case Circuit Breaker (MCCB) pada beberapa titik beban sesuai dengan standar IEEE 242-2001. Penyesuaian ini dipastikan mampu mengembalikan selektivitas dan keandalan sistem proteksi, sehingga kontinuitas operasional industri dapat berjalan aman dan efisien.
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The reliability of the electrical system is a crucial factor in supporting production activities at PT Kaltim Parna Industri (KPI). The planned addition of an LCO2 load and a 1 x 15 MW Gas Turbine Generator (GTG) will alter the electrical system configuration, potentially causing issues with the existing protection system coordination. This study aims to analyze the protection system design of the new plant and re-optimize the overcurrent protection coordination (overcurrent relay and ground fault relay) within the PT KPI electrical system following these additions. The research was conducted through comprehensive electrical system analysis, which included load flow and short circuit simulations using power system simulation software. The analysis results served as a reference for determining relay setting parameters and protection coordination, which were visualized and evaluated using Time-Current Characteristic (TCC) curve plots. The evaluation of the existing system revealed potential sympathetic tripping and false tripping due to inappropriate pickup limits and Coordination Time Interval (CTI) margins that did not comply with the standards. Following the re-setting process, the tripping time sequence between relays was optimally coordinated, achieving a CTI margin of 0.2 - 0.4 seconds in accordance with the IEEE 242-2001 standard. In addition to updating the relay settings, this study also recommends retrofitting the capacity of the Current Transformers (CT) and Molded Case Circuit Breakers (MCCB) at several load points in accordance with the IEEE 242-2001 standard. These adjustments ensure the restoration of the selectivity and reliability of the protection system, allowing industrial operational continuity to run safely and efficiently.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Koordinasi Proteksi, Relai Arus Lebih, Keandalan, Hubung Singkat.Protection Coordination, Overcurrent Relay, Reability, Short Circuit.
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:	Ahmad Raffi Romanov Sutomo
Date Deposited:	23 Jul 2026 06:04
Last Modified:	23 Jul 2026 06:04
URI:	http://repository.its.ac.id/id/eprint/136409

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