Life-extending control of fossil fuel power plants

P. Kallappa, Michael S. Holmes, Asok Ray

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The objective of life-extending control is to achieve a trade-off between structural durability and dynamic performance. This paper focuses on structural durability of the main steam header under load following to illustrate how the life-extending control of fossil fuel power plants can be achieved via feedforward/feedback. This concept is potentially applicable to both new and aging power plants under a variety of operational modes such as hot start-up, scheduled shutdown, and load following where the plant power is rapidly maneuvered to meet the varying load demand. The feedforward control policy is synthesized via nonlinear optimization of a multi-objective cost functional of dynamic performance and service life under the constraints of actuator saturation, operational limitations, and allowable structural damage, including thermomechanical fatigue and plastic deformation. A linear robust feedback control law that is superimposed on the feedforward sequence is synthesized based on induced L2-norm techniques. The results of simulation experiments are presented to demonstrate that the proposed feedforward/feedback control policy is potentially capable of ramping the plant power up at a rate of 10% of the full load per minute while maintaining the specified performance and satisfying the damage constraints.

Original languageEnglish (US)
Pages (from-to)1101-1118
Number of pages18
JournalAutomatica
Volume33
Issue number6
StatePublished - Jun 1997

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Fossil fuel power plants
Power plants
Feedforward control
Feedback control
Durability
Plant shutdowns
Robust control
Service life
Loads (forces)
Plastic deformation
Steam
Actuators
Aging of materials
Fatigue of materials
Feedback
Experiments

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • Electrical and Electronic Engineering

Cite this

Kallappa, P., Holmes, M. S., & Ray, A. (1997). Life-extending control of fossil fuel power plants. Automatica, 33(6), 1101-1118.
Kallappa, P. ; Holmes, Michael S. ; Ray, Asok. / Life-extending control of fossil fuel power plants. In: Automatica. 1997 ; Vol. 33, No. 6. pp. 1101-1118.
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Kallappa, P, Holmes, MS & Ray, A 1997, 'Life-extending control of fossil fuel power plants', Automatica, vol. 33, no. 6, pp. 1101-1118.

Life-extending control of fossil fuel power plants. / Kallappa, P.; Holmes, Michael S.; Ray, Asok.

In: Automatica, Vol. 33, No. 6, 06.1997, p. 1101-1118.

Research output: Contribution to journalArticle

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Kallappa P, Holmes MS, Ray A. Life-extending control of fossil fuel power plants. Automatica. 1997 Jun;33(6):1101-1118.