Analisis Kestabilan Tegangan Pada Sistem Interkoneksi Kelistrikan Sulawesi Bagian Selatan Dengan Mempertimbangkan Risiko Voltage Collapse Dalam Skenario Kontingensi N-1 Berdasarkan Novel Collapse Prediction Index (NCPI)

Puteri, Isnuansa Maharani (2025) Analisis Kestabilan Tegangan Pada Sistem Interkoneksi Kelistrikan Sulawesi Bagian Selatan Dengan Mempertimbangkan Risiko Voltage Collapse Dalam Skenario Kontingensi N-1 Berdasarkan Novel Collapse Prediction Index (NCPI). Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan kebutuhan energi listrik di Sulawesi Bagian Selatan, didorong oleh proyeksi pertumbuhan beban dan pembangunan sejumlah pembangkit baru pada tahun 2026, menuntut penguatan sistem tenaga listrik melalui pengembangan infrastruktur dan integrasi kapasitas pembangkit, termasuk PLTA Poko (3×41,5 MW) dan PLTA Watunohu (22 MW) sesuai RUPTL 2021–2030. Namun, integrasi pembangkit baru dan pertumbuhan beban memperbesar tantangan pengelolaan stabilitas tegangan, terutama dalam menghadapi gangguan sistem. Penelitian ini bertujuan untuk menganalisis dan mengevaluasi stabilitas tegangan pada sistem Sulawesi Bagian Selatan tahun 2026 dengan menggunakan Novel Collapse Prediction Index (NCPI) berbasis saluran. Kajian dilakukan dengan memodelkan sistem sesuai konfigurasi dan proyeksi tahun 2026, kemudian dilakukan simulasi berbasis DIgSILENT PowerFactory 2021 untuk mengevaluasi kinerja sistem pada kondisi operasi normal, skenario kontingensi saluran tunggal N-1, serta pada kombinasi kontingensi dengan penambahan beban yang signifikan. Kemudian, dilakukan pemasangan capacitor bank dievaluasi sebagai strategi mitigasi risiko voltage collapse. Hasil simulasi menunjukkan bahwa pada kondisi operasi normal, rata-rata NCPI sebesar 0.009 dengan tegangan minimum 0.975 p.u. yang menandakan sistem masih stabil. Pada skenario kontingensi saluran tunggal (N-1), rata-rata NCPI meningkat menjadi 0.0388 dengan tegangan minimum 0.944 p.u. Sedangkan pada kombinasi kontingensi dengan penambahan beban hingga 35%, rata-rata NCPI melonjak menjadi 0.116 dan tegangan minimum turun signifikan menjadi 0.755 p.u., mengindikasikan sistem mendekati voltage collapse. Implementasi capacitor bank mampu menurunkan rata-rata NCPI menjadi 0.072 dan meningkatkan tegangan minimum hingga 0.955 p.u., sehingga sistem kembali berada pada batas aman. Hasil disini menegaskan efektivitas metode NCPI dalam mengidentifikasi saluran kritis dan memetakan prioritas mitigasi, serta menunjukkan bahwa pemasangan capacitor bank efektif dalam memperbaiki profil tegangan dan menurunkan risiko voltage collapse pada sistem tenaga listrik tahun 2026.
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The increasing demand for electricity in South Sulawesi, driven by the projected load growth and the development of several new power plants in 2026, necessitates the strengthening of the power system through infrastructure development and the integration of generation capacity, including the Poko Hydroelectric Power Plant (3×41.5 MW) and Watunohu Hydroelectric Power Plant (22 MW) in accordance with the 2021–2030 RUPTL. However, the integration of new power plants and load growth significantly increases the challenge of managing voltage stability, especially when facing system disturbances. This study aims to analyze and evaluate the voltage stability of the South Sulawesi power system in 2026 using the Novel Collapse Prediction Index (NCPI) based on transmission lines. The study was conducted by modeling the system according to the 2026 configuration and projections, followed by simulations using DIgSILENT PowerFactory 2021 to evaluate the system’s performance under normal operating conditions, single-line N-1 contingency scenarios, and the combination of contingency with significant load increases. Furthermore, the installation of capacitor banks was evaluated as a strategy for mitigating voltage collapse risks. The simulation results show that under normal operating conditions, the average NCPI is 0.009 with a minimum voltage of 0.975 p.u., indicating that the system remains stable. In the contingency scenario, the average NCPI increased to 0.039 with a minimum voltage of 0.944 p.u. Meanwhile, in the combination of contingency with a 35% load increase, the average NCPI spiked to 0.116 and the minimum voltage dropped significantly to 0.755 p.u., indicating that the system is approaching voltage collapse. The implementation of capacitor banks reduced the average NCPI to 0.072 and increased the minimum voltage to 0.955 p.u., bringing the system back within safe limits.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kestabilan Tegangan; Novel Collapse Prediction Index (NCPI); Kontingensi N-1 Saluran; Voltage Collapse; Capacitor bank; Voltage Stability, Novel Collapse Prediction Index (NCPI), N-1 Contingency, Voltage Collapse, Capacitor bank
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK201 Electric Power Transmission 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:	Isnuansa Maharani Puteri
Date Deposited:	25 Jul 2025 06:37
Last Modified:	25 Jul 2025 06:37
URI:	http://repository.its.ac.id/id/eprint/121382

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