Analisa Penggunaan Hybrid Superconducting Fault Current Limiter (SFCL) Pada Sistem Proteksi Tenaga Listrik Di Kawasan Tursina

Sa’adah, Mufidah (2016) Analisa Penggunaan Hybrid Superconducting Fault Current Limiter (SFCL) Pada Sistem Proteksi Tenaga Listrik Di Kawasan Tursina. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Sistem tenaga listrik yang baik adalah sistem yang dapat menjamin keandalan dan kesinambungan penyaluran. Kenaikan arus hubung singkat mengakibatkan koordinasi proteksi menjadi tidak tepat sehingga keandalan sistem menurun akibat pemutusan tidak berada tepat pada titik gangguan yang seharusnya. Pada saat dilakukan simulasi gangguan pada incoming feeder Tursina terjadi kesalahan koordinasi proteksi dengan terputusnya rele diluar kawasan Tursina karena setting lowset rele tersebut lebih rendah dari arus hubung singkat yang lewat. Untuk mengurangi arus hubung singkat yang mengalir pada feeder yang memiliki arus gangguan terbesar diperlukan impedansi tambahan salah satunya menggunakan Hybrid Superconducting Fault Current Limiter (SFCL) agar tidak perlu dilakukan resetting pada sistem utama ring PT. Pupuk Kaltim. Setelah dilakukan penempatan dan setting SFCL pada incoming feeder Tursina terjadi penurunan arus hubung singkat 3 fasa ½ cycle dari 16,1kA menjadi 3,44kA maka dilakukan koordinasi ulang rele arus lebih sehingga menghasilkan kerja rele yang sesuai pada titik gangguan dan meningkatkan keandalan sistem. Hasil koordinasi ditampilkan menggunakan kurva Time Current Curve (TCC). ========== A great power system is a system that can assure its reability and the continuity of distribution. The increasing of short circuit current makes protection-coordination become inaccurate, therefore it reduce system’s realibility due to inaccurate tripping of fault point. When simulating the fault at incoming feeder of Tursina, there was a mess protection-coordination, breaker on the outside of Tursina is open due to its low set lower than contribution current from Kanibungan to Tursina. To reduce short circuit current on the feeder which has the biggest short circuit current, an additional impedance is needed, one of this additional impedance is Hybrid Superconducting Fault Current Limiter (SFCL), so there is no need to do resetting at main system of PT. Pupuk Kaltim. After SFCL’s installation has done at the incoming feeder of Tursina, there was decreasment of 3 phase ½ cycle short circuit current from 16,1 kA to 3,44 kA so the resetting of overcurrent relay is needed, so the relays work based on the right sequence at the fault point and increase its realibility. Protection-coordination showed as Current Time Curve (TCC).

Item Type: Thesis (Undergraduate)
Additional Information: RSE 621.317 Sa`a a 3100016068136
Uncontrolled Keywords: 3-phase short-circuit currents, Overcurrent relay, Superconducting Fault Current Limiter
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7868.P6 Power supply
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK7872 Electric current converters, Electric inverters.
Divisions: Faculty of Industrial Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis
Depositing User: - Davi Wah
Date Deposited: 18 Oct 2019 07:18
Last Modified: 18 Oct 2019 07:18
URI: http://repository.its.ac.id/id/eprint/71225

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