Optimalisasi Performa Proportional-Integral (PI) Controller Berbasis Internal Model Control pada Pulverizer 8B Mill Outlet Temperature di PLTU Paiton Unit 8, PT POMI

Wulandari, Retnaning Dwi (2026) Optimalisasi Performa Proportional-Integral (PI) Controller Berbasis Internal Model Control pada Pulverizer 8B Mill Outlet Temperature di PLTU Paiton Unit 8, PT POMI. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5001221011-Undergaduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (4MB) | Request a copy

Abstract

PI controller pada sistem pulverizer 8B mill outlet temperature PLTU Paiton Unit 8, PT POMI, saat ini ditentukan secara manual melalui metode trial-and-error yang bergantung pada intuisi operator sehingga berpotensi menimbulkan osilasi temperatur, pergerakan aktuator yang agresif, dan risiko keausan mekanis pada damper. Tujuan dari penelitian ini adalah untuk memodelkan dinamika proses mill outlet temperature ke dalam bentuk fungsi transfer First-Order Plus Dead Time (FOPDT) sebagai landasan perancangan sistem kontrol, merancang dan mengimplementasikan tuning PI controller menggunakan metode Internal Model Control (IMC), serta membandingkan performa parameter PI aktual dengan parameter IMC-PI berdasarkan analisis respons transien dan respons dinamis aktuator. Metode yang dilakukan adalah dengan mengidentifikasi parameter FOPDT secara grey box dari data operasional pembangkit, kemudian mengevaluasi 20 variasi \tau_Cmenggunakan kriteria ITAE, dan mengimplementasikan parameter terpilih pada DCS aktual untuk diuji. Hasil identifikasi menunjukkan parameter FOPDT berupa K_{normalized}=0,5243\ °C/%, τ=95,4 detik, dan θ=4,5 detik, dengan RMSE validasi sebesar 0,1731 °C dan R^2=0,9701. Dari evaluasi ITAE, \tau_C=45 detik terpilih, menghasilkan K_p=7,35 dan T_i=95,4 detik. Hasil pengujian lapangan menunjukkan bahwa parameter IMC-PI berhasil mempertahankan mill outlet temperature pada 64,831°C tanpa overshoot dalam rentang operasional aman 59–66°C, dengan standar deviasi hot air damper IMC-PI sebesar 1,59% berbanding 1,885% pada parameter PI aktual, serta standar deviasi cold air damper IMC-PI sebesar 1,5195% berbanding 3,105% pada parameter PI aktual.
=======================================================================================================================================
PI controller of the mill outlet temperature system at pulverizer 8B, PLTU Paiton Unit 8, PT POMI, is currently determined manually through a trial-and-error method that relies on operator intuition, which risks temperature oscillation, aggressive actuator movement, and mechanical wear on the dampers. The objectives of this study are to model the mill outlet temperature process dynamics as a First-Order Plus Dead Time (FOPDT) transfer function as the basis for control system design, to design and implement PI controller tuning using the Internal Model Control (IMC) method, and to compare the performance of the existing PI parameters against the IMC-PI parameters based on transient response and actuator dynamic response analyses. The method involves identifying the FOPDT parameters through a grey box approach using actual plant operational data, evaluating 20 variations of \tau_Cusing the ITAE criterion, and implementing the selected parameters on the actual DCS for field testing. The identification results yield FOPDT parameters of K_{normalized}=0.5243\ °C/%, τ=95.4 s, and θ=4.5 s, with a validation RMSE of 0.1731 °C and R^2=0.9701. From the ITAE evaluation, \tau_C=45 s was selected, yielding K_p=7.35 and T_i=95.4 s. Field test results demonstrate that the IMC-PI parameters successfully maintained the mill outlet temperature at 64.831°C without overshoot within the safe operating range of 59–66°C, with a hot air damper opening standard deviation of 1.590% for IMC-PI compared to 1.885% for the existing PI parameters, and a cold air damper opening standard deviation of 1.519% for IMC-PI compared to 3.105% for the existing PI parameters.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	FOPDT, IMC, Mill Outlet Temperature, PI Controller, Pulverizer. FOPDT, IMC, Mill Outlet Temperature, PI Controller, Pulverizer
Subjects:	Q Science > QC Physics > QC151 Fluid dynamics Q Science > QC Physics > QC271 Temperature measurements Q Science > QC Physics > QC320 Heat transfer
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45201-(S1) Undergraduate Thesis
Depositing User:	Retnaning Dwi Wulandari
Date Deposited:	21 Jul 2026 03:27
Last Modified:	21 Jul 2026 03:27
URI:	http://repository.its.ac.id/id/eprint/135932

Actions (login required)

View Item