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Plant-wide physical model-based control for a thermal power plant

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4 Author(s)
Prasad, G. ; Sch. of Electr. & Electron. Eng., Queen''s Univ., Belfast, UK ; Irwin, G.W. ; Swidenbank, E. ; Hogg, B.W.

This paper reports the development of a constrained, nonlinear physical model-based, predictive control strategy for improved plant-wide control of a thermal power plant. The proposed strategy makes use of successive linearisation and extended Kalman filtering to obtain a linear state-space model. The linear model and a quadratic programming routine are then used to design a constrained long-range predictive control routine. The proposed approach places major emphasis on better disturbance modeling based on a physical plant model. The paper discusses how this approach results into selection of a specific set of model parameters for online estimation to account for time-varying system characteristics resulting from major system disturbances and ageing. A plant model with 14 nonlinear ODEs, simulating the dominant characteristics of a 200 MW oil-fired power plant at Ballylumford, N. Ireland, has been used to test the control strategy

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Decision and Control, 1999. Proceedings of the 38th IEEE Conference on  (Volume:5 )

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