Analisis Remaining Life Generator Transformer Unit 5 PLTU Suralaya Berbasis Health Index Menggunakan Multi Parameter
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Deny Priya Adityawan
*
Institut Teknologi PLN, DKI Jakarta,
Indonesia
- I Made Indradjaja M. Brunner Institut Teknologi PLN, DKI Jakarta, Indonesia (*) Corresponding Author
Abstract
Generator Transformer (GT) merupakan komponen kritis pembangkit listrik tenaga uap (PLTU) yang kegagalannya menyebabkan force outage, namun kerangka health index (HI) konvensional yang bertumpu pada parameter minyak isolasi berpotensi melewatkan degradasi elektrik dan mekanik. Penelitian ini merancang kerangka HI multi parameter yang mengintegrasikan fault factor, paper quality factor, electrical integrity factor, dan acoustic integrity factor, dengan lokasi penelitian di PLTU Suralaya. Bobot faktor dan sub-parameternya ditentukan melalui Analytical Hierarchy Process (AHP) berdasarkan penilaian lima responden ahli, menghasilkan bobot fault factor 29,79%, paper quality factor 49,13%, electrical integrity factor 13,94%, dan acoustic integrity factor 7,15%, kemudian diintegrasikan dengan weighted score sum pada data pengujian generator transformer unit 5, 6, dan 7 periode 2020–2025. Hasil perhitungan menempatkan unit 5 pada 87,67% dan unit 7 pada 96,43% berkategori very good, sedangkan unit 6 pada 82,45% berkategori good. Uraian per faktor mengungkap sensitivitas kategori HI terhadap ambang nilai: kategori very good unit 5 dan unit 7 menyamarkan faktor elektrik dan akustik yang kritis, sedangkan kategori good unit 6 semata disebabkan penuaan wajar tanpa faktor kritis. Validasi terhadap riwayat operasi membuktikan penurunan skor elektrik unit 5 terekam kurang dari satu tahun sebelum kegagalan bushing pada 2024. Kebaruan penelitian terletak pada integrasi dimensi elektrik dan akustik ke dalam HI generator transformer 685 MVA, pembobotan berbasis AHP, serta usulan aturan faktor kritis yang memicu investigasi wajib pada skor ≤ 2.
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