Perancangan Active Fault Tolerant Control (AFTC) pada Sistem Pengendalian Temperatur Superheater PLTU PT PJB Gresik dengan Kesalahan Sensor

Karuniawan, Achmad Rizky (2018) Perancangan Active Fault Tolerant Control (AFTC) pada Sistem Pengendalian Temperatur Superheater PLTU PT PJB Gresik dengan Kesalahan Sensor. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Superheater berfungsi mengubah uap jenuh menjadi uap kering dengan proses pemanasan. Pada superheater terdapat suatu sistem pengendalian temperatur untuk menjaga temperatur output finally superheater agar sesuai dengan setpoint yaitu dengan cara memanipulasi variabel laju aliran water spray agar dapat menurunkan temperatur output finally superheater. Tak jarang pada sistem pengendalian temperatur terjadi kesalahan pada sensor sehingga kontroler akan mengirim sinyal yang salah kepada control valve. Pada Tugas Akhir ini dilakukan perancangan Active Fault Tolerant Control (AFTC) yang mampu bekerja ketika terdapat kesalahan pada sensor dan dapat mempertahankan performansi sistem. Langkah awal yang dilakukan adalah pemodelan dari proses yang terjadi pada finally superheater. Langkah kedua adalah merancang sistem kontrol PID. Langkah terakhir adalah merancang sistem AFTC dimana terdapat dua tahap yaitu perancangan observer dan rekonfigurasi kontrol. Uji performansi yang diberikan berupa kesalahan sensitivitas dan kesalahan bias. Pada sistem AFTC dengan kesalahan sensitivitas 8% didapatkan nilai maximum overshoot 4,0583%, settling time 75 detik dan error steady state 0,0019%. Sedangkan sistem tanpa AFTC didapatkan nilai maximum overshoot 9,5796%, settling time 13 detik dan error steady state 8,6944%. ========================================================== Superheater works to change saturated steam into superheated steam with heating process. In the superheater there is a temperature control system to keep the temperature of the finally superheater output stay at setpoint by manipulating variable water flow rate of the spray in order to decrease the temperature of the finally superheater output. Not infrequently the temperature control system occurs on the sensor error so that the controller will send the wrong signal to the control valve. In this Final Project is designed Active Fault Tolerant Control (AFTC) which is able to work when there is a mistake on the sensor and still can keep the system performance. The first step is the modeling of the processes in the finally superheater. The second step is to design a PID control system. The final step is to design an AFTC system where there are two stages of designing the observer and reconfiguration control. Performance tests are given in the form of error sensitivity and error of bias. AFTC system with 8% sensitivity error obtained maximum overshoot 4.0583%, settling time 75 seconds, and error steady state 0.0019%. While the system without AFTC obtained maximum overshoot 9.5796%, settling time 13 seconds, and error steady state 8.6944%.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: active fault tolerant control, finally superheater, kontrol PID, sensor
Subjects: T Technology > T Technology (General) > T55 Industrial Safety
T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK1001 Production of electric energy or power
T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL521.3 Automatic Control
Divisions: Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: Achmad Rizky Karuniawan
Date Deposited: 21 Jun 2021 11:00
Last Modified: 21 Jun 2021 11:00
URI: https://repository.its.ac.id/id/eprint/54496

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