Perancangan Active Fault Tolerant Control Akibat Kesalahan Sensor Pada Sistem Pengendalian Level Steam Drum Di PLTU Unit 3 dan 4 PT. PJB Unit Pembangkitan Gresik

Romdon, Mochammad Miftachur (2018) Perancangan Active Fault Tolerant Control Akibat Kesalahan Sensor Pada Sistem Pengendalian Level Steam Drum Di PLTU Unit 3 dan 4 PT. PJB Unit Pembangkitan Gresik. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Salah satu komponen penting pada PLTU adalah steam drum. Steam drum berfungsi sebagai tempat menampung air pada proses pembuatan uap. Pada steam drum diterapkan sistem pengendalian level untuk menjaga level air pada Normal Water Level (NWL). Apabila level air terlalu tinggi maka akan menyebabkan sudu-sudu turbin menjadi korosi, sedangkan apabila level air terlalu rendah maka steam drum akan overheated. Salah satu komponen yang sering mengalami pemasalahan adalah sensor karena letaknya yang bersentuhan langsung dengan variabel yang diukur. Kesalahan pada sensor akan menyebabkan kestabilan proses terganggu. Pada tugas akhir ini dilakukan perancangan active fault tolerant control(AFTC) yang dapat menjaga stabilitas sistem ketika terjadi kesalahan pada sensor. Ada 2 tahapan dalam merancang AFTC yaitu merancang observer dan rekonfigurasi kontrol. Hasil simulasi menunjukkan bahwa algoritma AFTC mampu menjaga stabilitas sistem ketika terjadi kesalahan pada sensor. Kesalahan yang diberikan adalah kesalahan bias dan sensitivitas. Pada uji sensitivitas 12% respon sistem AFTC mempunyai maximum overshoot, settling time dan error steady state berturut-turut sebesar 1.91 %, 35 detik dan 0.188%. Sedangkan sistem tanpa algoritma AFTC mempunyai maximum overshoot, settling time dan error steady state berturut-turut sebesar 14.15 %, 48 detik dan 13.65%. ========================================================= One important component of PLTU is steam drum. The function of Steam drum is to hold water in the process of making steam. In steam drum applied level control system to maintain water level at Normal Water Level (NWL). If the water level is too high it will cause the turbine blades to become corrosive, whereas if the water level is too low then the steam drum will be overheated. One of the components that often sustain problems is the sensor because the location in direct contact with the measured variable. Error at sensor will cause stability of process disturbed. In this final project is designed active fault tolerant control (AFTC) that can maintain the stability of the system when there is an error on the sensor. There are 2 stages in designing AFTC, that is designed observer and reconfiguration control. The simulation results show that the AFTC algorithm is able to maintain the stability of the system when an error occurs on the sensor. when the sensitivity test of 12% AFTC system response has maximum overshoot, settling time and steady state error are 1.91%, 35 seconds and 0.188%. While the system without AFTC algorithm has maximum overshoot, settling time and steady state error are 14.15%, 48 seconds and 13.65%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: steam drum, sensor fault, Active Fault Tolerant Control (AFTC)
Subjects: T Technology > T Technology (General) > T55 Industrial Safety
T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL521.3 Automatic Control
Divisions: Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: miftachur miftachur
Date Deposited: 28 Jun 2021 00:56
Last Modified: 28 Jun 2021 00:56
URI: https://repository.its.ac.id/id/eprint/56432

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