Model-Based Supervisory Control Structure for Plantwide Control of a Reactor–Separator–Recycle Plant

2014 ◽  
Vol 53 (52) ◽  
pp. 20177-20190 ◽  
Author(s):  
Hilda M. Moscoso-Vasquez ◽  
Gloria M. Monsalve-Bravo ◽  
Hernan Alvarez
Keyword(s):  
Supervisory Control ◽  
Control Structure ◽  
Model Based ◽  
Plantwide Control

scholarly journals Plantwide Control: A New Design Procedure and Its Application at Liquefied Petroleum Gas Facility (LPGF) Plant

2020 ◽  
Vol 190 ◽  
pp. 00039
Author(s):  
Toto Haksoro ◽  
Safira Firdaus Mujiyanti ◽  
Aulia Siti Aisjah ◽  
Totok Ruki Biyanto
Keyword(s):  
Supervisory Control ◽  
Energy Use ◽  
Control Method ◽  
Design Procedure ◽  
Regulatory Control ◽  
System Response ◽  
Control Procedure ◽  
Liquefied Petroleum Gas ◽  
Fractionation Process ◽  
Plantwide Control

Natural Gas is the cleanest source of fossil energy, resulting in lower carbon emissions from coal and oil. In gas processing, the process done to separate the product composition is the fractionation process. In the gas industry, facilities/parts that are specifically to perform the process are called liquefied petroleum gas Facility plant (LPGF). Process Control is the key to a safe and profitable process industry. The Plantwide control is a structural design and control strategy for the factory as a whole. The preferred control method on this final task is the PID for regulatory control as well as the decentralized supervisory control for supervisory control and the real time optimizer for its optimization. The new plantwide control procedure can increase the profit in the process liquefied petroleum gas facility plant up to USD 643 h–1 (3 %) and decreased energy use by USD 5 h–1 (5.16 %). The application of the Plantwide control on the liquefied petroleum gas facility is also able to produce a stable system response when the interruption of the feed flow rate changes. This is demonstrated by decreasing slurries time and maximum overshoot as well as eliminating steady-state errors.

scholarly journals A deterministic approach for design of supervisory control of LPV systems with delay

PLoS ONE ◽  
2021 ◽  
Vol 16 (8) ◽  
pp. e0256408
Author(s):  
Ch. Nauman Zahid ◽  
Mina Salim ◽  
Raja Ali Riaz ◽  
Jamshed Iqbal
Keyword(s):  
Time Delay ◽  
Supervisory Control ◽  
Closed Loop ◽  
Control Structure ◽  
Real Life ◽  
Pressure Control ◽  
Smith Predictor ◽  
Delay Compensation ◽  
Lpv Systems ◽  
Time Delay Compensation

Linear Parameter Varying (LPV) systems and their control have gained attraction recently as they approximate nonlinear systems with higher order than ordinary linear systems. On the other hand, time delay is an inherent part of various real-life applications. A supervisory control structure is proposed in this paper for LPV systems subject to time delays. In the proposed control structure, a supervisor selects the most suitable controller from a bank of controllers; which desires to enhance the performance of closed-loop system in contrast with using a single robust controller. The analysis is based on the celebrated Smith predictor for time delay compensation and we provide a sufficient condition to assure the stability of the closed-loop switched system in terms of dwell time. Simulations on blood pressure control of hypertension patients in postoperative scenario are used to exemplify the effectiveness of the utilized technique. The operating region of the system is partitioned into five smaller operating regions to construct corresponding robust controllers and perform hysteresis switching amongst them. Simulation results witnessed that the proposed control scheme demonstrated a pressure undershoot less than the desired value of 10 mmHg while the Mean Arterial Pressure (MAP) remains within ±5 mmHg of the desired value.

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