Analisis Aliran Daya dan Load Shedding Sistem Kelistrikan Pertamina Patra Niaga RU III Akibat Integrasi Jaringan 150 kV PLN

Firza, Said (2026) Analisis Aliran Daya dan Load Shedding Sistem Kelistrikan Pertamina Patra Niaga RU III Akibat Integrasi Jaringan 150 kV PLN. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Integrasi sistem kelistrikan Pertamina Patra Niaga RU III dengan jaringan PLN 150 kV bertujuan untuk meningkatkan keandalan dan fleksibilitas operasi sistem tenaga listrik. Perubahan kondisi operasi akibat integrasi ini memerlukan evaluasi menyeluruh terhadap aliran daya serta kemampuan sistem dalam mempertahankan stabilitas saat terjadi gangguan, khususnya pada kondisi grid loss yang menyebabkan sistem beroperasi secara islanding. Penelitian ini bertujuan menganalisis profil aliran daya pascaintegrasi serta mengevaluasi skema Fast Load Shedding (FLS) yang diperlukan untuk menjaga kestabilan sistem saat kehilangan suplai dari jaringan PLN. Simulasi dilakukan menggunakan perangkat lunak ETAP melalui studi load flow dan transient stability. Parameter utama yang dianalisis adalah respons frekuensi sistem sebagai indikator keberhasilan FLS, sedangkan tegangan bus serta daya aktif dan reaktif generator digunakan sebagai parameter pendukung validasi. Studi transient dilakukan pada dua skenario gangguan, yaitu hubung singkat tiga fasa pada Bus 1A-A-1 (12 kV) saat sistem terhubung dengan PLN, dan kondisi grid loss yang menyebabkan sistem beroperasi secara islanding. Hasil studi load flow menunjukkan bahwa kondisi operasi normal pascaintegrasi masih berada dalam batas yang diizinkan, dengan profil tegangan sebesar 98,82% dari tegangan nominal. Pada skenario hubung singkat tiga fasa, frekuensi dan tegangan mengalami penurunan sesaat namun kembali stabil setelah gangguan dibersihkan. Pada kondisi grid loss tanpa load shedding, defisit daya aktif menyebabkan frekuensi dan tegangan terus menurun hingga terjadi collapse. Evaluasi terhadap skema FLS existing sebesar 5,3 MW menunjukkan bahwa kapasitas tersebut belum mampu mempertahankan kestabilan sistem. Berdasarkan hasil simulasi, kapasitas Fast Load Shedding sebesar 10,75 MW merupakan skenario optimal yang mampu mempertahankan stabilitas frekuensi dan tegangan sistem pasca grid loss.
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The integration of the Pertamina Patra Niaga RU III electrical system with the PLN 150 kV network aims to enhance the reliability and operational flexibility of the power system. This integration alters the system's operating conditions, necessitating a comprehensive evaluation of power flow and the system's capability to maintain stability under disturbances, particularly during grid loss events that cause the system to operate in islanding mode. This study aims to analyze the power flow profile following integration and to evaluate the Fast Load Shedding (FLS) scheme required to maintain system stability upon loss of supply from the PLN network. Simulations were conducted using ETAP software through load flow and transient stability studies. System frequency response was employed as the primary parameter to assess the effectiveness of the FLS scheme, while bus voltage profiles and generator active and reactive power outputs were used as supporting parameters for validation. Transient studies were performed under two disturbance scenarios: a three-phase short circuit fault at Bus 1A-A-1 (12 kV) while the system remained connected to PLN, and a grid loss condition that caused the system to transition into islanding operation. Load flow results indicate that post-integration operating conditions remain within permissible limits, with a voltage profile of 98.82% of the nominal voltage. Under the three-phase fault scenario, system frequency and voltage experienced a momentary drop but recovered to stable values following fault clearance. Under the grid loss condition without load shedding, active power deficit caused frequency and voltage to decline continuously until system collapse occurred. Evaluation of the existing FLS scheme at 5.3 MW revealed that this capacity was insufficient to sustain system stability. Based on simulation results, a Fast Load Shedding capacity of 10.75 MW represents the optimal scenario for maintaining frequency and voltage stability following grid loss.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Aliran Daya, Fast Load Shedding, Grid Loss, Integrasi PLN, Stabilitas Transien, Fast Load Shedding, Grid Loss, Load Flow, PLN integration, Transient Stability.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1010 Electric power system stability. Electric filters, Passive.
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Said Firza
Date Deposited:	22 Jul 2026 07:09
Last Modified:	22 Jul 2026 07:09
URI:	http://repository.its.ac.id/id/eprint/136250

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