Koordinasi Operasi Pembangkit Untuk Pengendalian Frekuensi Di Pertamina Patra Niaga RU Plaju Palembang

Paritrana, Ranadya Putra (2026) Koordinasi Operasi Pembangkit Untuk Pengendalian Frekuensi Di Pertamina Patra Niaga RU Plaju Palembang. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sistem tenaga listrik di Pertamina Patra Niaga RU Plaju Palembang beroperasi sebagai sistem terisolasi yang belum terhubung dengan jaringan PLN, sehingga kestabilan frekuensi sepenuhnya bergantung pada koordinasi antar unit pembangkit internal. Penelitian ini menganalisis koordinasi operasi pembangkit melalui pemodelan dan simulasi kestabilan transien menggunakan perangkat lunak ETAP 21. Sistem dimodelkan dengan tiga unit Gas Turbine Generator (GTG) masing-masing berkapasitas 31 MW pada tegangan 12 kV, dengan GTG UA dioperasikan sebagai generator dan GTG UB serta UC pada mode voltage control. Respons frekuensi dievaluasi terhadap skenario lepasnya (trip) GTG UC pada tiga tingkat pembebanan, yaitu 30%, 40%, dan 50%, serta terhadap pengaruh penyetelan droop governor. Hasil simulasi menunjukkan bahwa nilai droop bawaan sebesar 5 menyebabkan osilasi frekuensi yang berkepanjangan, sedangkan penyetelan droop pada nilai 8–9 mempercepat waktu pemulihan (settling time) menjadi kurang dari 10 detik. Pembebanan sebesar 30% menghasilkan respons terbaik dengan nadir frekuensi paling mendekati 50 Hz. Berdasarkan temuan tersebut, penelitian ini merekomendasikan pengoperasian pada tingkat pembebanan 30% disertai penyetelan droop governor yang tepat untuk menjaga kestabilan frekuensi sistem sebelum diintegrasikan dengan jaringan PLN.
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The power system at Pertamina Patra Niaga’s Plaju Power Plant in Palembang operates as an isolated system that is not yet connected to the PLN grid, so frequency stability depends entirely on coordination among the internal generating units. This study analyzes power plant operational coordination through transient stability modeling and simulation using ETAP 21 software. The system is modeled with three Gas Turbine Generator (GTG) units rated 31 MW each at 12 kV, with GTG UA operated as a swing generator and GTG UB and UC in voltage control mode. The frequency response was evaluated for a GTG UC trip scenario at three load levels 30%, 40%, and 50% as well as for the effect of droop governor tuning. Simulation results show that a default droop value of 5 causes prolonged frequency oscillations, whereas setting the droop to a value of 8–9 reduces the settling time to less than 10 seconds. A 30% load produced the best response with the lowest frequency closest to 50 Hz. Based on these findings, this study recommends operation at a 30% load level accompanied by appropriate droop governor settings to maintain system frequency stability before integration with the PLN grid.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	kestabilan frekuensi, koordinasi pembangkit, droop governor, sistem terisolasi, ETAP 21, frequency stability, generator coordination, isolated power system, ETAP 21
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1007 Electric power systems control T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1322.6 Electric power-plants
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Ranadya Putra Paritrana
Date Deposited:	24 Jul 2026 04:11
Last Modified:	24 Jul 2026 04:11
URI:	http://repository.its.ac.id/id/eprint/136817

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