Analisis Stabilitas Transien dan Mekanisme Load Shedding pada PT. Pupuk Sriwidjaja Akibat Penambahan Beban Pabrik P3B

Bariq, Edvandra Fairuz (2026) Analisis Stabilitas Transien dan Mekanisme Load Shedding pada PT. Pupuk Sriwidjaja Akibat Penambahan Beban Pabrik P3B. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

PT. Pupuk Sriwidjaja (PUSRI) merupakan salah satu industri nasional yang memproduksi pupuk di Indonesia, berencana untuk membangun pabrik baru bernama P3B. PUSRI merubah perencanaan pembangunan pabrik P3B dari yang awalnya 23 MW menjadi 14 MW, disertai dengan perubahan konfigurasi jaringan dan mekanisme pengoperasian. Oleh karena itu, diperlukan analisis terkait kestabilan transien agar sistem tersebut dapat mempertahankan kestabilan ketika menghadapi berbagai kemungkinan gangguan pada pengoperasian. Pada penelitian ini dilakukan simulasi dengan berbagai skenario gangguan, yaitu pelepasan satu atau dua unit generator, gangguan hubung singkat tiga fasa pada semua level tegangan, dan motor starting pada dua unit motor berkapasitas besar di pabrik P3B. Untuk mitigasi terkait gangguan tersebut, dilakukan mekanisme pelepasan beban berbasis frekuensi berdasarkan IEEE C37.106-1987 dengan enam step untuk menjaga kestabilan antara daya pembangkit dan beban. Hasil simulasi menunjukkan bahwa UFR enam step berdasarkan IEEE C37.106-1987 mampu mempertahankan kestabilan frekuensi, tegangan, dan sudut rotor pada semua skenario. Pada kasus hubung singkat dan motor starting, sistem dapat mempertahankan frekuensi, tegangan, dan sudut rotor. Namun diperlukan UFR tambahan akibat kondisi islanding pada gangguan hubung singkat di SG-3301 (33 kV). Dengan adanya penelitian ini diharapkan dapat menerapkan mekanisme pelepasan beban dan koordinasi sistem proteksi yang tepat untuk menjaga keandalan sistem kelistrikan pada PUSRI setelah penambahan beban P3B.
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PT Pupuk Sriwidjaja (PUSRI) is one of the national fertilizer-producing industries in Indonesia and plans to construct a new plant named P3B. PUSRI revised the P3B development plan from an initial demand of 23 MW to 14 MW, accompanied by changes in network configuration and operating mechanisms. Therefore, a transient stability analysis is required to ensure that the system can maintain its stability when facing various possible disturbances during operation. In this study, simulations were carried out under several disturbance scenarios, including the outage of one or two generating units, three-phase short-circuit faults at all voltage levels, and motor starting of two large-capacity motors in the P3B plant. To mitigate these disturbances, a frequency-based load shedding scheme based on IEEE C37.106-1987 with six steps was implemented to maintain the balance between generation and load. The simulation results show that the six-step UFR scheme based on IEEE C37.106-1987 is capable of maintaining frequency, voltage, and rotor angle stability in all scenarios. In the short circuit fault and motor starting scenarios, the system was able to maintain frequency, voltage, and rotor angle stability. However, additional UFR implementation is required due to the islanding condition caused by a short-circuit fault at SG-3301 (33 kV), and attention should be given to the voltage dip condition that has the potential to disturb operating motors and sensitive equipment. Through this study, it is expected that an appropriate load shedding scheme and proper protection system coordination can be implemented to maintain the reliability of the PUSRI electrical system after the addition of the P3B load.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kestabilan Sistem, Kestabilan Transient, Gangguan Transient, Pelepasan Beban, Power System Stability, Transient Stability, Transient Disturbance, Load shedding.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves).
Divisions:	Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Edvandra Fairuz Bariq
Date Deposited:	30 Jul 2026 00:46
Last Modified:	30 Jul 2026 00:46
URI:	http://repository.its.ac.id/id/eprint/135661

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