Optimalisasi Setting Relai Line Current Differential (LCD) dalam Implementasi Program Zero Down Time di KIPP IKN

Nugraha, Rizky Prima (2026) Optimalisasi Setting Relai Line Current Differential (LCD) dalam Implementasi Program Zero Down Time di KIPP IKN. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Keandalan pasokan listrik di Ibu Kota Nusantara (IKN), khususnya pada Kawasan Inti Pusat Pemerintahan (KIPP), memerlukan sistem distribusi 20 kV yang mampu mengisolasi gangguan secara cepat tanpa mengganggu kontinuitas suplai pada bagian sistem yang tidak terdampak gangguan. Penelitian ini bertujuan menentukan setting relai Line Current Differential (LCD) yang selektif dan andal sebagai proteksi utama pada skema Zero Down Time (ZDT) subsistem close loop KIPP IKN. Parameter yang dianalisis meliputi arus charging, rasio Current Transformer (CT), arus pickup, arus diferensial, arus restraint, dan karakteristik slope relai. Penelitian ini menggunakan metode kuantitatif melalui pemodelan dan simulasi ETAP. Data yang digunakan mencakup topologi jaringan, parameter kabel SKTM, arus beban, data CT, karakteristik relai LCD P3L30, hasil load flow, arus hubung singkat, serta data historis SAIDI dan SAIFI. Simulasi dilakukan pada kondisi operasi normal, gangguan internal di dalam zona proteksi kabel, dan gangguan eksternal atau through-fault di luar zona proteksi. Kinerja relai dievaluasi berdasarkan posisi titik operasi terhadap kurva karakteristik differential-restraint. Hasil penelitian menunjukkan bahwa setting pickup relai dapat ditetapkan lebih besar dari arus beban maksimum dan arus charging, sehingga relai tidak bekerja pada kondisi normal. Pada gangguan internal, relai berada pada daerah operasi dan memberikan perintah trip kepada Circuit Breaker (CB) di kedua ujung kabel terganggu. Sebaliknya, pada gangguan eksternal, arus diferensial mendekati nol sehingga relai tetap berada pada daerah restraint dan tidak menyebabkan trip pada bagian sistem yang tidak terdampak gangguan. Dengan demikian, setting LCD yang selektif mampu mendukung skema ZDT melalui isolasi gangguan pada ruas terganggu dan mempertahankan suplai melalui jalur alternatif. Skema ini berpotensi menurunkan SAIDI sebesar 35% menjadi 56,62 menit/pelanggan dan SAIFI sebesar 2,45% menjadi 0,835 kali/pelanggan di KIPP IKN.
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The reliability of electricity supply in the Nusantara Capital City (IKN), particularly in the Core Government Area (KIPP), requires a 20 kV distribution system capable of isolating faults rapidly without disrupting supply continuity in the unaffected system sections. This study aims to determine a selective and reliable setting for the Line Current Differential (LCD) relay as the main protection scheme in the Zero Down Time (ZDT) close-loop subsystem of KIPP IKN. The analysed parameters include charging current, Current Transformer (CT) ratio, pickup current, differential current, restraint current, and relay slope characteristics. This research applies a quantitative method through ETAP-based modelling and simulation. The input data include network topology, medium-voltage underground cable parameters, load current, CT data, LCD P3L30 relay characteristics, load flow results, short-circuit currents, and historical SAIDI and SAIFI data. Simulations are conducted under normal operating conditions, internal faults within the protected cable zone, and external faults or through-faults outside the protection zone. Relay performance is evaluated based on the operating point position on the differential-restraint characteristic curve. The results show that the relay pickup setting can be set above the maximum load current and charging current, preventing relay operation under normal conditions. During internal faults, the relay operates in the operate region and issues a trip command to the Circuit Breakers (CB) at both ends of the faulted cable section. In contrast, during external faults, the differential current approaches zero, keeping the relay in the restraint region and preventing tripping in unaffected system sections. Therefore, the selective LCD setting supports the ZDT scheme by isolating only the faulted section while maintaining supply continuity through alternative paths. This scheme has the potential to reduce SAIDI by 35% to 56.62 minutes/customer and SAIFI by 2.45% to 0.835 interruptions/customer in KIPP IKN.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Relai Line Current Differential, Zero Down Time, Gangguan Internal, Gangguan Eksternal, SAIDI, SAIFI, KIPP IKN, Line Current Differential Relay, Internal Fault, External Fault
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:	Rizky Prima Nugraha
Date Deposited:	29 Jul 2026 07:31
Last Modified:	29 Jul 2026 07:31
URI:	http://repository.its.ac.id/id/eprint/140216

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