Optimasi Koordinasi Proteksi Voltage Restrained Overcurrent Relay Menggunakan Metode Modified Firefly Algorithm Pada Microgrid: Studi Kasus Pulau Semau

Iskandar, Abdulloh (2025) Optimasi Koordinasi Proteksi Voltage Restrained Overcurrent Relay Menggunakan Metode Modified Firefly Algorithm Pada Microgrid: Studi Kasus Pulau Semau. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penggunaan sumber energi terbarukan pada jaringan mikro telah meningkat pesat dalam beberapa tahun terakhir; beberapa jaringan mikro beroperasi secara hibrida, pasokan penuh dari PV pada siang hari dan menggunakan diesel pada malam hari. Peningkatan sumber energi terbarukan berbasis inverter berdampak pada karakter jaringan saat terjadi gangguan hubung singkat. Pada pembangkit listrik berbasis generator sinkron, kontribusi arus hubung singkat yang dihasilkan sangat besar. Sementara itu, pada pembangkit listrik berbasis inverter, arus hubung singkat yang dihasilkan tidak jauh berbeda dengan arus nominal. Pada kondisi tersebut, relai proteksi arus lebih konvensional sudah tidak efektif lagi dalam melindungi jaringan, sehingga diperlukan pengembangan agar jaringan tetap aman dan gangguan dapat diisolasi dengan baik dan cepat. Relai yang diusulkan adalah voltage restrained overcurrent relay. Relay ini diharapkan dapat mendeteksi gangguan dan mengisolasinya dengan cepat baik pada sumber berbasis generator sinkron maupun berbasis inverter. Simulasi pengaturan yang dihasilkan dilakukan dengan menggunakan perangkat lunak ETAP. Hasil penelitian ini menunjukkan bahwa saat pembangkitan hanya dari PV, relai arus lebih tidak beroperasi saat terjadi gangguan hubung singkat. Setelah VR-OCR diaktifkan, semua relay yang dilalui arus hubung singkat dapat beroperasi dengan relay terakhir beroperasi pada 1723 ms. Hasil dari perhitungan manual kemudian dioptimasi menggunakan Modified Firefly Algorithm dan membuat optimasi total time dial dari 3.76 menjadi 3.68.
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The adoption of renewable energy sources in microgrids has increased rapidly in recent years; some microgrids operate in a hybrid operation, fully supplied by photovoltaic during the day and using diesel at night. The increase in inverter-based renewable energy sources has an impact on the character of the grid when a short circuit fault occurs. In synchronous generator-based power plants, the contribution of the short circuit current generated is very large. Meanwhile, in inverter-based power plants, the short circuit current generated is not much different from the nominal current. In these conditions, conventional overcurrent protection relays are no longer effective in protecting the grid, so development is needed so that the grid remains safe and the fault can be isolated properly and quickly. The proposed relay is a voltage restrained overcurrent relay. This relay is expected to be able to detect faults and isolate them quickly both in synchronous generator-based and inverter-based sources. Simulation of the resulting settings was carried out using ETAP software. The results of this study indicate that when generating only from PV, the overcurrent relay does not operate when a short circuit fault occurs. After VR-OCR is activated, all relays through which the short circuit current passes can operate with the last relay operating at 1723 ms. The results of the manual calculations were then optimized using the Modified Firefly Algorithm and made the total time dial optimization from 3.76 to 3.68.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	hubung singkat, microgrid, proteksi, voltage restrained overcurrent
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK2861 Electric relays. Protective relays--Security measures.
Divisions:	Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20101-(S2) Master Thesis
Depositing User:	Abdulloh Iskandar
Date Deposited:	24 Jul 2025 03:39
Last Modified:	24 Jul 2025 03:39
URI:	http://repository.its.ac.id/id/eprint/120947

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