Setting Differential Relay Transformer (87T) dengan Pertimbangan Vector Group pada PLTU Tenayan 2x110 MW
Submission Date: 2020-08-10 23:59:13
Accepted Date: 2021-01-25 18:25:03
Abstract
PT. Pembangkitan Jawa Bali (PJB) Unit Bisnis Jasa Operasi dan Pemeliharaan (UBJOM) PLTU Tenayan memiliki peralatan proteksi yang berfungsi sebagai penunjang kegiatan pembangkitan listrik. Salah satu proteksi utama yang digunakan pada PLTU Tenayan adalah differential relay transformer (87T). Differential relay ini berfungsi melindungi main transformator dari gangguan dan bekerja dengan cepat dan selektif dalam memutus gangguan. Pada sistem kelistrikan PLTU Tenayan, main transformator maupun transformator UAT memiliki konfigurasi vector group, sehingga menyebabkan arus yang mengalir pada kedua sisi transformator akan berbeda, dan arus yang dirasakan oleh CT pada kedua sisi transformator akan berbeda pula, sehingga relay beroperasi tanpa adanya gangguan. Pada tanggal 9 Desember 2018, terjadi trip pada generator unit 1 PLTU Tenayan, sehingga menyebabkan blackout. Kejadian ini diduga akibat sambaran petir di sisi transmisi 150 kV. Pada Tugas Akhir ini akan dilakukan analisis setting differential relay transformer (87T) dengan pertimbangan vector group pada PLTU Tenayan 2x110 MW. Metode penelitian pada Tugas Akhir ini menggunakan software ETAP 12.6.0. Hasil analisis dari simulasi tersebut akan digunakan sebagai referensi untuk menentukan setting differential relay transformer yang tepat, sehingga sistem proteksi differential relay (87T) dapat bekerja dengan cepat dan selektif dalam mengatasi gangguan.
Keywords
Differential Relay; Vector Group; Sistem Kelistrikan PLTU Tenayan
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