An adaptive control strategy was developed for an 18-stage multistage flash (MSF) desalination plant presently operating in the Arabian Gulf region. The parameter-scheduling strategy maintains optimality of PID controllers over the operating region and is derived by simulation using a detailed phenomenological dynamic model. An optimal method of reducing the model into first-order dead-time form and a non-parametric model-based simulation facility are presented. Based on a relative gain array analysis, an appropriate control structure has been established. A number of integral performance criteria have been used, without resorting to the use of a reduced model, directly with the non-parametric simulation facility for optimal controller tuning. The controller parameters are given as a vector function of the top brine temperature (TBT) and the brine recycle flow rate, which are key variables for the TBT control.
An adaptive scheme with an optimally tuned PID controller for a large MSF desalination plant
Ein adaptives Regelungsschema mit einem optimal eingestellten PID-Regler für eine große Meerwasserentsalzungsanlage mit mehreren Verdampfereinheiten
Control Engineering Practice ; 4 , 5 ; 721-734
1996
14 Seiten, 14 Bilder, 3 Tabellen, 15 Quellen
Article (Journal)
English
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