Analisis Stabilitas Tegangan Terhadap Potensi Voltage Collapse Sistem Kelistrikan Sulawesi Utara Pada Kondisi Kontingensi N-1

Izzati, Tanazzaha Nur (2025) Analisis Stabilitas Tegangan Terhadap Potensi Voltage Collapse Sistem Kelistrikan Sulawesi Utara Pada Kondisi Kontingensi N-1. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pertumbuhan penduduk dan kemajuan teknologi telah mendorong peningkatan signifikan kebutuhan energi listrik. Namun, hal ini tidak diimbangi dengan kapasitas pembangkitan yang memadai, sehingga pembangkit dan saluran transmisi beroperasi mendekati kapasitas maksimalnya. Kondisi ini menyebabkan sistem tenaga rentan terhadap gangguan, seperti yang terjadi di Sulawesi Utara Gorontalo pada tahun 2024 akibat pemutusan saluran transmisi 150 kV yang menyebabkan beberapa gardu induk padam. Oleh karena itu, dilakukan analisis kestabilan tegangan mempertimbangkan kondisi kontingensi berdasarkan Novel Collapse Prediction Index. Analisis dilakukan pada kondisi normal, kontingensi, dan penambahan beban. Hasil simulasi menunjukkan bahwa pemutusan saluran TJK–ISM memiliki dampak paling signifikan terhadap kestabilan tegangan ditunjukkan dengan nilai NCPI tertinggi sebesar 0.41 dan tegangan minimum sebesar 0.96 p.u. pada sistem. Sehingga dilakukan analisis lebih lanjut terhadap gangguan pemutusan saluran TJK - ISM dengan melakukan penambahan beban pada sistem. Dalam kondisi terburuk yaitu pemutusan saluran TJK - ISM disertai penambahan beban, sistem mengalami ketidakstabilan tegangan yang berpotensi menyebabkan voltage collapse dengan nilai NCPI mencapai 1.04 dan tegangan minimum sebesar 0.81 p.u. Sebagai mitigasi, dilakukan kompensasi daya reaktif menggunakan kapasitor bank di bus ISM sebesar 65 MVAr. Pemasangan kapasitor bank mampu meningkatkan tegangan minimum sebesar 19.58%, dari 0.81 p.u. menjadi 0.97 p.u., dengan rata-rata tegangan 1.00 p.u., serta menurunkan NCPI maksimum sebesar 41.38%, dari 1.04 menjadi 0.61, yang menunjukkan peningkatan margin stabilitas sistem secara signifikan.
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Population growth and technological advancements have significantly increased the demand for electrical energy. However, this rise in demand has not been matched by sufficient generation capacity, causing power plants and transmission lines to operate near their maximum limits. As a result, the power system becomes vulnerable to disturbances, as occurred in North Sulawesi and Gorontalo in 2024, where the disconnection of a 150 kV transmission line led to the outage of several substations. Therefore, a voltage stability analysis was conducted under contingency conditions using the Novel Collapse Prediction Index (NCPI). The analysis was carried out under normal conditions, contingency scenarios, and increased load conditions. Simulation results indicate that the disconnection of the TJK–ISM line had the most significant impact on voltage stability, shown by the highest NCPI value of 0.41 and a minimum voltage of 0.96 p.u. Further analysis was then conducted for the disconnection of the TJK–ISM line with additional load on the system. Under the worst-case condition—TJK–ISM line outage combined with load increase—the system experienced voltage collapse, with an NCPI value of 1.04 and a minimum voltage of 0.81 p.u. As a mitigation measure, reactive power compensation was implemented using a capacitor bank rated at 65 MVAr installed at ISM Bus. This capacitor bank installation successfully increased the minimum voltage by 19.58%, from 0.81 p.u. to 0.97 p.u., with an average voltage of 1.00 p.u., and reduced the maximum NCPI by 41.36%, from 1.04 to 0.61, indicating a significant improvement in the system’s voltage stability margin.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kapasitor Bank, Kontingensi, Novel Collapse Prediction Index, Stabilitas Tegangan.
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. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1322.6 Electric power-plants T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5105 Data Transmission Systems
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User:	Tanazzaha Nur Izzati
Date Deposited:	24 Jul 2025 03:59
Last Modified:	24 Jul 2025 03:59
URI:	http://repository.its.ac.id/id/eprint/120964

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