Evaluasi Rencana Penambahan Saluran Transmisi AC 150 kV antara Dua Segmen Pembangkit Mempertimbangkan Stabilitas Transien pada Plan Smelter Nikel di Sulawesi

Noranida, Risma Amelia (2024) Evaluasi Rencana Penambahan Saluran Transmisi AC 150 kV antara Dua Segmen Pembangkit Mempertimbangkan Stabilitas Transien pada Plan Smelter Nikel di Sulawesi. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Untuk menjaga keandalan operasional sistem industri dalam memastikan kontinuitas hasil produksinya, sistem tenaga listrik mengambil peranan yang sangat krusial. Ketersediaan daya listrik harus tetap terjaga agar proses produksi dapat terus berjalan. Meskipun demikian dalam penyaluran daya tersebut tidak menutup kemungkinan untuk terjadi suatu kegagalan pada sistem tenaga listriknya. Sistem kelistrikan pada plan smelter nikel ini terbagi menjadi dua segmen pembangkitan, yaitu untuk sub-sistem beban pemanas (furnace load) dan sub-sistem beban tambahan (auxiliary/utility load). Dalam pengoperasiannya furnace grid dan auxiliary grid bekerja secara terpisah dengan kedua grid saling terhubung oleh sistem DC link untuk membantu kekurangan daya ketika terjadi gangguan pada salah satu sisi sub-sistem dengan melakukan transfer daya dari furnace grid maupun auxiliary grid. Seluruh sistem dan proses pada sisi furnace dikendalikan sepenuhnya dari sisi auxiliary, sehingga baik sisi furnace maupun auxiliary harus tetap terjaga kestabilannya untuk menjaga operasional keseluruhan sistem berjalan dengan baik. Permasalahan yang saat ini dihadapi adalah ketika terjadi gangguan transien pada sistem selalu berakhir dengan pemadaman total (blackout). Sesuai dengan dugaan awal yang perkirakan, kegagalan sistem yang terjadi adalah akibat keberadaan DC link yang tidak bekerja secara efektif. Hal tersebut dikarenakan kekurangan daya reaktif pada sisi sub-sistem terganggu yang seharusnya mendapatkan suplai dari DC link. Oleh sebab itu, diperlukan tindakan rekonfigurasi jaringan untuk memperbaiki operasional sistem. Rekonfigurasi pertama yang dilakukan adalah dengan melepas penggunaan DC link sebagai alternatif pemulihan gangguan, kemudian dilanjutkan rekonfigurasi kedua dengan menambah saluran transmisi AC 150 kV di antara dua sub-sistem sebagai interkoneksi untuk semakin memperkokoh sistem. Pada tugas akhir ini, permasalahan yang dibahas terfokus pada analisis kestabilan transien disertai uji gangguan untuk masing masing kondisi yaitu eksisting, pelepasan DC link, dan penambahan saluran transmisi AC 150 kV.
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To maintain the operational reliability of the industrial system in ensuring the continuity of its production, the electric power system plays a very crucial role. The availability of electrical power must be maintained so that the production process can continue. However, the distribution of power does not rule out the possibility of a failure in the power system. The electrical system in this nickel smelter plan is divided into two generation segments, namely for the furnace load sub-system and auxiliary load sub-system. In operation, the furnace grid and auxiliary grid work separately with both grids connected to each other by a DC link system to help the power shortage when there is a disturbance on one side of the sub-system by transferring power from the furnace grid and auxiliary grid. All systems and processes on the furnace side are fully controlled from the auxiliary side, so both the furnace and auxiliary sides must be kept stable to keep the operation of the entire system running properly. The problem currently faced is that when a transient disturbance occurs in the system, it always ends in a blackout. In accordance with the initial assumption, the system failure that occurred was due to the existence of a DC link that did not work effectively. This is due to the lack of reactive power on the side of the disturbed sub-system that should get supply from the DC link. Therefore, network reconfiguration measures were required to improve system operation. The first reconfiguration carried out was to remove the use of the DC link as an alternative to fault recovery, then continued with the second reconfiguration by adding a 150 kV AC transmission line between the two sub-systems as an interconnection to further strengthen the system. In this final project, the problems discussed focus on transient stability analysis accompanied by disturbance tests for each condition, namely existing, DC link removal, and the addition of 150 kV AC transmission lines.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Kestabilan Transien, Sistem DC link, Saluran Transmisi AC 150 kV, Black Out, Rekonfigurasi Sistem, Transient Stability, DC link system, 150 kV AC Transmission Line, Black Out, System Reconfiguration.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK201 Electric Power Transmission T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1519.S68 Hydroelectric power plants T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3226 Transients (Electricity). Electric power systems. Harmonics (Electric waves).
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering
Depositing User:	Risma Amelia Noranida
Date Deposited:	30 Jul 2024 03:13
Last Modified:	30 Jul 2024 03:13
URI:	http://repository.its.ac.id/id/eprint/110228

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