Studi Kasus Penyetelan Differential Relay Pada Transformator 2 di Gardu Induk Buduran. (Case Study of Differential Relay Adjustment in Transformer 2 at Buduran Substation).

Pratama, Manan (2023) Studi Kasus Penyetelan Differential Relay Pada Transformator 2 di Gardu Induk Buduran. (Case Study of Differential Relay Adjustment in Transformer 2 at Buduran Substation). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.

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Abstract

Komponen dalam proses penyaluran tenaga listrik di gardu induk adalah peralatan yang memiliki peranan penting dan sangat vital, salah satu komponen tersebut di antaranya adalah transformator. Transformator tenaga termasuk bagian yang sangat sensitif dalam sistem tenaga listrik dan rentan terhadap gangguan. Gangguan pada transformator tenaga dapat terjadi baik di dalam maupun di luar transformator tersebut. Untuk itu, diperlukan sistem proteksi yang handal dan dapat bekerja secara koordinatif agar sistem proteksi trafo di Gardu Induk 150KV Buduran, Sidoarjo dapat berfungsi dengan baik dan mencegah terjadinya arus gangguan yang dapat merusak peralatan serta mempertahankan kontinuitas penyaluran tenaga listrik yang baik, differential relay adalah salah satu komponen penting dalam sistem proteksi listrik yang digunakan untuk mendeteksi dan mengisolasi gangguan arus hubung singkat maka perlu dilakukan pensettingan yang tepat pada differential relay. Metode penelitian ini menggunakan data yang didapatkan dari GI Buduran, Sidoarjo yang kemudian dilakukan perhitungan untuk menentukan error mismatch, arus differential, arus restrain, arus slope, pengaturan arus untuk differential relay dan parameter-parameter pada differential relay saat kondisi normal, serta menghitung parameter-parameter differential relay pada saat kondisi gangguan. Dari hasil perhitungan teori didapatkan setting differential relay sebesar 0,2884 pU pada sisi primer dan 0,5768 pU pada sisi sekunder. Untuk slope1 40% untuk slope2 80%. Selanjutnya, dilakukan percobaan simulasi gangguan menggunakan software etap 12.6.0 guna mengetahui prinsip kinerja dari differential relay dalam menangani gangguan. Hasil dari perhitungan yang dilakukan ini berhasil dalam menghasilkan setting relay yang sesuai dengan kebutuhan sistem proteksi. Setting differential relay yang dihasilkan mampu mendeteksi dan mengisolasi gangguan arus lebih dengan waktu respon yang cepat dan akurasi yang tinggi.

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