Ananda, Latif Tri (2025) Simulasi Metode Petri Net Untuk Sistem Pengaman Steam Turbine Generator 51G2 Dengan Redundansi Solenoid Valve Di PT Kilang Pertamina Internasional RU IV Cilacap. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sistem pengaman pada Steam Turbine Generator 51G2 di PT Kilang Pertamina Internasional RU IV Cilacap memiliki peran penting dalam keberlangsungan operasional kilang. Salah satu tantangan utama adalah menjaga agar sistem pengaman tetap dapat berfungsi meskipun terjadi kegagalan pada komponen vital seperti solenoid valve, yang berperan dalam memicu Emergency Shutdown Valve (ESV). Kegagalan solenoid valve dapat menyebabkan sistem pengaman tidak mampu memicu shutdown otomatis saat parameter abnormal, seperti overspeed yang berpotensi mengakibatkan kerusakan serius pada turbin. Penelitian ini bertujuan untuk mengevaluasi efektivitas Petri Net untuk mensimulasikan dan memodelkan sistem pengaman failsafe Steam Turbine Generator 51G2 sebelum dikonversi ke bahasa PLC. Kemudian merancang sistem pengaman Steam Turbine Generator 51G2 dengan redundansi solenoid valve dan menganalisis persamaan matematis keandalan sistem pengaman sebelum dan sesudah redundansi solenoid valve. Pemodelan dilakukan dengan metode Petri Net dan dilakukan simulasi untuk memvalidasi logika kontrol sistem pengaman dalam berbagai skenario. Hasil penelitian melalui simulasi Petri Net menunjukkan bahwa Petri Net dapat dengan baik memodelkan dan memvalidasi rancangan sistem pengaman failsafe sebelum dikonversi ke bahasa PLC yang lebih rumit, serta rancangan sistem pengaman dengan redundansi solenoid valve mampu menjaga fungsi failsafe meskipun salah satu solenoid valve mengalami kegagalan. Secara matematis, keandalan sistem meningkat signifikan dari R menjadi R(2-R). Asumsi jika keandalan sistem pengaman saat ini yaitu 0,999 maka keandalan sistem pengaman setelahnya menjadi 0,999999. Pendekatan Petri Net terbukti mampu mempermudah perancangan sistem pengaman Steam Turbine Generator 51G2 dengan redundansi solenoid valve yang bekerja dengan prinsip failsafe.
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The safeguard system of the Steam Turbine Generator 51G2 at PT Kilang Pertamina Internasional RU IV Cilacap plays a crucial role in ensuring the continuous operation of the refinery. One of the main challenges is to maintain the functionality of the safeguard system even in the event of failure in critical components such as the solenoid valve, which is responsible for triggering the Emergency Shutdown Valve (ESV). A solenoid valve failure may cause the safeguard system to fail in initiating an automatic shutdown during abnormal parameters, such as overspeed, which could potentially lead to serious damage to the turbine. This study aims to evaluate the effectiveness of Petri Net in simulating and modeling the failsafe safeguard system of the Steam Turbine Generator 51G2 before it is converted into PLC language. Furthermore, it designs a safeguard system with solenoid valve redundancy and analyzes the mathematical reliability equations of the system before and after the implementation of redundancy. The system modeling is carried out using the Petri Net method and simulations are conducted to validate the safeguard logic under various scenarios. The results show that Petri Net can effectively model and validate the design of the failsafe safeguard system prior to its conversion into the more complex PLC language. In addition, the design incorporating redundant solenoid valves is proven to maintain failsafe functionality even if one solenoid valve fails. Mathematically, system reliability increases significantly from R to R(2-R). Assuming the current system reliability is 0.999, the improved system achieves a reliability of 0.999999. The Petri Net approach has been proven to facilitate the design of the Steam Turbine Generator 51G2 safeguard system with solenoid valve redundancy operating under a failsafe principle.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Steam Turbine Generator, Solenoid Valve, Redundansi, Metode Petri Net, Sistem Pengaman, Failsafe, Steam Turbine Generator, Solenoid Valve, Redundancy, Petri Net Method, Safeguard System, Failsafe |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK3070 Automatic control |
| Divisions: | Faculty of Intelligent Electrical and Informatics Technology (ELECTICS) > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Latif Tri Ananda |
| Date Deposited: | 25 Jul 2025 02:34 |
| Last Modified: | 25 Jul 2025 02:34 |
| URI: | http://repository.its.ac.id/id/eprint/121050 |
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