1 Plantwide control Control structure design for complete chemical plants Sigurd Skogestad Department of Chemical Engineering Norwegian University of Science.

1

Plantwide control

Control structure design for complete chemical plants

Sigurd Skogestad

Department of Chemical EngineeringNorwegian University of Science and Tecnology (NTNU)Trondheim, Norway

ThailandAugust 2005

2

Trondheim, Norway

3

Trondheim

Oslo

UK

NORWAY

DENMARK

GERMANY

4

NTNU,TrondheimProcess Control professors:– Bjarne Foss– Morten Hovd – Jens Balchen – Heinz Preisig– Sigurd Skogestad

EE

ChE

5

Sigurd Skogestad

• Born in 1955• 1978: Siv.ing. Degree (MS) in Chemical Engineering from NTNU (NTH)• 1980-83: Process modeling group at the Norsk Hydro Research Center in

Porsgrunn• 1983-87: Ph.D. student in Chemical Engineering at Caltech, Pasadena, USA.

Thesis on “Robust distillation control”. Supervisor: Manfred Morari• 1987 - : Professor in Chemical Engineering at NTNU• Since 1994: Head of process systems engineering center in Trondheim

(PROST)• Since 1999: Head of Department of Chemical Engineering• 1996, 2005: Book “Multivariable feedback control” (Wiley)• 2000, 2003: Book “Prosessteknikk” (Tapir)• Group of about 10 Ph.D. students

in the process control area

6

Research: Develop simple yet rigorous methods to solve

problems of engineering significance.

• Use of feedback as a tool to

1. reduce uncertainty (including robust control),

2. change the system dynamics (including stabilization; anti-slug control),

3. generally make the system more well-behaved (including self-optimizing control).

• limitations on performance in linear systems (“controllability”),

• control structure design and plantwide control,

• interactions between process design and control,

• distillation column design, control and dynamics.

• Natural gas processes