Wijoyo, Gunadi (2019) Justifikasi Overhaul Simple Inspection (SI)/ Minor Untuk Meningkatkan Equivalen Availability Factor (EAF) Pt Pembangkit Listrik XYZ, Studi Kasus Pada Steam Turbine 1.0 (ST 1.0). Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
PT Pembangkit Listrik XYZ memiliki strategic goal yang tertuang dalam RJPP Tahun 2017-2021 untuk mencapai EAF korporat sesuai standar kelas dunia (top 10% NERC), yaitu sebesar 93.8 %. Pencapaian EAF korporat PT Pembangkit Listrik XYZ pada Tahun 2016 adalah 90.61%. PT Pembangkit Listrik XYZ bertekad mendukung tercapainya sasaran korporat sesuai standar kelas dunia, dengan mencari strategi untuk menaikkan EAF pembangkit.
Terdapat beberapa alternatif strategi yang bisa dipilih untuk menaikkan EAF, yaitu memperpanjang interval overhaul (OH), memperpendek durasi OH, dan mengeliminasi OH minor. Selama ini, PLTGU PT Pembangkit Listrik XYZ menggunakan siklus pemeliharaan berdasar manual book pabrikan adalah Simple Inspection (SI) – Medim Inspection (ME) – Simple Inspection (SI) – Serious Inspection (SE) dengan interval 8000 EOH. Sehingga apabila PLTGU tersebut mempertahankan siklus pemeliharaan tersebut, maka target EAF sesuai road map sulit tercapai.
Metode yang digunakan dalam penelitian ini adalah dengan melakukan analisis RAM (Reliability, Availability, Maintainability) dengan menggunakan software RBD, RGA, dan Weibull dengan inputan data downtime peralatan ST 1.0. Batas nilai reliability yang diijinkan untuk setiap peralatan yaitu diatas 0,6 dengan MTBF lebih dari 16000 jam. Dari running software menunjukkan hanya 12 peralatan yang memiliki nilai reliability dibawah 0,6 dan MTBF dibawah 16000 jam. Sehingga strategi yang ditentukan yaitu melakukan eliminasi overhaul minor untuk meningkatkan EAF pembangkit. Selanjutnya adalah melakukan mitigasi risiko terhadap dampak eliminasi overhaul minor (simple inspection) dengan menggunakan skala likelihood dan skala impact serta merangkai seluruh peralatan steam turbine kedalam konfigurasi seri atau parallel sesuai dengan kondisi dilapangan untuk mengetahui output EAF (equivalent availability factor) pembangkit. Hasilnya menunjukkan nilai risiko yang dihasilkan rendah artinya mitigasi eliminasi OH Minor dapat diterima. Kemudian, hasil running software untuk nilai EAF sistem pembangkit sebesar 91, 25% (dengan OH minor) dan 94, 47% (tanpa OH Minor), naik 3, 22%. Hal ini sejalan dengan RJPU perusahaan untuk meningkatkan nilai EAF pada tahun 2021 sebesar 93, 8%. ================================================================================================
PT XYZ Power Plant has a strategic goal set out in the RJPP for 2017-2021 to achieve corporate EAF according to world class standards (top 10% NERC), which is 93.8%. The achievement of corporate EAF of PT XYZ Power Plant in 2016 was 90.61%. PT XYZ Power Plant is determined to support the achievement of corporate targets according to world-class standards, by looking for strategies to increase generator EAF.
There are several alternative strategies that can be chosen to increase EAF, namely extending the interval of overhaul (OH), shortening the duration of OH, and eliminating OH minor. During this time, the PT XYZ Power Plant using a maintenance cycle based on the manufacturer's manual book is Simple Inspection (SI) - Medim Inspection (ME) - Simple Inspection (SI) - Serious Inspection (SE) at 8000 EOH intervals. So that if the PLTGU maintains the maintenance cycle, the EAF target according to the road map is difficult to achieve.
The method used in this study is by analyzing RAM (Reliability, Availability, Maintainability) by using RBD, RGA, and Weibull software with input equipment ST 1.0 data downtime. The limit of the allowable reliability value for each equipment is above 0.6 with MTBF of more than 16000 hours. From running software shows only 12 devices that have reliability values below 0.6 and MTBF below 16000 hours. So the determined strategy is to eliminate minor overhauls to increase generator EAF. Next is to mitigate the risk of the impact of the elimination of minor overhaul (simple inspection) using the likelihood scale and impact scale and assembling all steam turbine equipment into a series or parallel configuration in accordance with the conditions in the field to find out the equivalent availability factor generator. The results show a low risk value means that OH Minor elimination mitigation is acceptable. Then, the results of running software for the EAF generating system value were 91, 25% (with OH minor) and 94, 47% (without OH Minor), up 3, 22%. This is in line with the RJPU company to increase the EAF value in 2021 by 93.8%.
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTMT 620.004 4 Wij j-1 2019 |
| Uncontrolled Keywords: | PLTGU, Overhaul Minor, Condition Base Maintenance (CBM), Reliability, Availability, Maintainability (RAM) |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ217.6 Predictive Control T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1007 Electric power systems control |
| Divisions: | Faculty of Business and Management Technology > Management Technology > 61101-(S2) Master Thesis |
| Depositing User: | Gunadi Wijoyo |
| Date Deposited: | 28 Jul 2021 05:31 |
| Last Modified: | 23 Mar 2022 07:50 |
| URI: | http://repository.its.ac.id/id/eprint/61109 |
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