Evaluasi Proteksi Sistem Kelistrikan Pembangkit Jenis Gas Turbine Generator 3x18 MW Pada PT Pupuk Sriwidjaja Palembang (Pusri)
Submission Date: 2022-07-21 21:21:40
Accepted Date: 2022-09-12 08:46:55
Abstract
Indonesia yaitu PT. Pupuk Sriwidjaja Palembang mengalami permasalahan sistem kelistrikan pada salah satu pabriknya. Permasalahan tersebut disebabkan oleh adanya hubung singkat pada salah satu bus di pabrik Pusri 4 dan disinyalir adanya miskoordinasi antar rele pengaman. Miskoordinasi rele pengaman menyebabkan circuit breaker pada generator open karena adanya arus hubung singkat kiriman. Saat circuit breaker generator open, maka terjadi ayunan daya pada pembebanan. Disinyalir generator hanya diatur default dan tidak dipersiapkan untuk mengatasi gangguan tersebut. Dari permasalahan tersebut menyebabkan adanya gangguan secara kompleks hingga menyebabkan blackout pada pabrik lama Pusri. Karena generator hanya diatur default, maka ketika ada kasus blackout, generator akan off secara tiba-tiba. Generator yang sering off secara tiba-tiba karena adanya gangguan dapat menyebabkan berkurangnya kapabilitas generator dalam membangkitkan daya serta berdampak pada lifetime dari generator tersebut. Blackout ini menyebabkan kerugian yang sangat besar untuk PT. Pupuk Sriwidjaja Palembang, oleh karena itu perlu dilakukan evaluasi terhadap sistem proteksi internal generator. Tugas akhir ini berfokus pada beberapa rele internal generator sebagai sistem proteksinya. Rele tersebut antara lain adalah rele sinkronisasi, rele hilang eksitasi, rele arus lebih urutan negatif, rele arus lebih dengan kendali tegangan, rele frekuensi, dan rele diferensial. Studi evaluasi ini dilakukan dengan menggunakan software ETAP 12.6 agar mendapatkan hasil simulasi yang sesuai dengan kejadian di lapangan. Hasil dari Tugas Akhir ini dapat menjadi rekomendasi untuk PT. Pupuk Sriwidjaja Palembang serta berbagai instansi guna melindungi generator ketika terjadi gangguan serupa.
Keywords
Miskoordinasi; Blackout; Sistem Proteksi Internal Generator; ETAP 12.6
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