Control System Structure Design of a Gas Pre-Separation Unit

The paper focuses on simple procedure of computing the number of control degrees of freedom for designing the plantwide control system. In this study, we consider control system design of a pre-separation unit. Using the procedure we can compute the maximum and minimum number of the control degrees of freedom. This work proposes six plantwide control structures with a different number of degrees of freedom. The proposed control structures could be carried out using key performance indicators to determine which control structure best meets the strategic goals. For analysis of the proposed control structures is used the dynamic disturbance sensitivity with the simultaneous supply of several disturbing influences. In conclusion, we show the effectiveness of the proposed plantwide control structures. We demonstrate the feasibility of using the procedure to compute the number of control degrees of freedom for the design problems.