Specialization project

PowerPoint-presentasjon

Specialization projectProject title Practical modeling and PI-control of level processes

Student Ingrid Didriksen

Supervisor Krister Forsman ObjectiveLevel controllers in a chemical plant

Obtain process models by use of historical data

Obtain better tuning for the PI-controllers

Apply theory in practice

The ProblemPoor tuning in level controllers

Kc and I for all the level controllersWhy?Problem with poor tuningOscillations

Process output and set pointDesiredSmooth controlBuffer tanksHow?

Process modelHow?Arrest time Disturbance in inflow Deviation in process output

TuningLevel controllerKc0I0KcI

fmodelfSkogestad13.383.91.484032.152.1223.0829.11.495338.868.72Simulation

No time delayProcess output and set pointProcess input

With time delayProcess output and set pointProcess inputRetuning

Process output and set pointProcess inputFurture workConcider dynamics of the level controllers

Thank you for your attention!