Wijaya, Rizki Adi (2026) Analisis Pengaruh Superconducting Fault Current Limiter Untuk Meningkatkan Koordinasi Proteksi Directional Overcurrent Relay Pada Sistem Distribusi Nunukan. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Meningkatnya penetrasi distributed generation (DG) menimbulkan aliran arus dua arah dan peningkatan arus hubung singkat yang berpotensi memengaruhi koordinasi proteksi dari sisi pembangkit sampai dengan distribusi. Penelitian ini mengusulkan penerapan superconducting fault current limiter (SFCL) dan skema dual-setting directional overcurrent relay (DOCR) pada sistem distribusi Nunukan sebagai objek studi kasus. Grasshopper Optimization Algorithm (GOA) digunakan untuk menentukan nilai time dial setting (TDS) dengan memenuhi batas coordination time interval (CTI) minimum sebesar 0,2 detik pada tiga karakteristik inverse-time standar IEC, yaitu Normally Inverse (NI), Very Inverse (VI), dan Extremely Inverse (EI). Selanjutnya dilakukan perhitungan impedansi SFCL untuk membatasi arus hubung singkat, diikuti optimasi ulang koordinasi proteksi dan validasi hasil menggunakan kurva time-current characteristic (TCC) pada ETAP. Hasil penelitian menunjukkan bahwa GOA menghasilkan koordinasi dual-setting DOCR yang memenuhi standar CTI, dengan karakteristik IEC EI sebagai karakteristik yang memberikan koordinasi proteksi terbaik dengan total waktu operasi rele utama sebesar 2,8489 detik sebelum penerapan SFCL dan 3,2114 detik setelah penerapan SFCL. Perhitungan menghasilkan nilai impedansi SFCL sebesar 3,382 Ω yang mampu menurunkan arus hubung singkat maksimum pada bus Nunukan dari 3385 A menjadi 1700 A atau sebesar 49,78%. Validasi kurva TCC menunjukkan bahwa seluruh pasangan rele memenuhi batas CTI yang ditetapkan serta penerapan SFCL mampu memperbaiki koordinasi proteksi antara sistem distribusi dan pembangkit dengan mengurangi kontribusi arus gangguan dari sisi pembangkit. Dengan demikian, kombinasi dual-setting DOCR, GOA, dan SFCL terbukti efektif dalam meningkatkan koordinasi proteksi pada sistem distribusi Nunukan.
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The increasing penetration of distributed generation (DG) causes bidirectional current flow and an increase in short-circuit current levels, which have the potential to affect protection coordination from the generation side to the distribution system. This study proposes the implementation of a superconducting fault current limiter (SFCL) and a dual-setting directional overcurrent relay (DOCR) scheme in the Nunukan distribution system as the case study. The Grasshopper Optimization Algorithm (GOA) is used to determine the time dial setting (TDS) while satisfying the minimum coordination time interval (CTI) requirement of 0.2 seconds for three IEC standard inverse-time characteristics, namely Normally Inverse (NI), Very Inverse (VI), and Extremely Inverse (EI). Furthermore, the SFCL impedance is calculated to limit the short-circuit current, followed by the re-optimization of protection coordination and the validation of the results using time-current characteristic (TCC) curves in ETAP. The results show that GOA produces dual-setting DOCR coordination that satisfies the CTI requirement, with the IEC Extremely Inverse (EI) characteristic providing the best protection coordination with a total primary relay operating time of 2.8489 seconds before SFCL implementation and 3.2114 seconds after SFCL implementation. The calculation results in an SFCL impedance of 3.382 Ω, which is capable of reducing the maximum short-circuit current at the Nunukan Bus from 3385 A to 1700 A, or by 49.78%. The TCC validation shows that all relay pairs satisfy the specified CTI requirement, and the implementation of the SFCL is able to improve protection coordination between the distribution system and the generation system by reducing the fault current contribution from the generation side. Therefore, the combination of dual-setting DOCR, GOA, and SFCL is proven to be effective in improving protection coordination in the Nunukan distribution system.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | distributed generation (DG), directional overcurrent relay (DOCR), superconducting fault current limiter (SFCL), time dial setting (TDS), grasshopper optimization algorithm (GOA) |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1007 Electric power systems control 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: | Rizki Adi Wijaya |
| Date Deposited: | 30 Jul 2026 03:19 |
| Last Modified: | 30 Jul 2026 03:19 |
| URI: | http://repository.its.ac.id/id/eprint/139473 |
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