Title :
Boiler drum-level control using QFT
Author :
Sunil, P.U. ; Barve, Jayesh J. ; Nataraj, P.S.V.
Author_Institution :
GE Power & Water, HTC, Hyderabad, India
Abstract :
In this work, SISO Quantitative Feedback Theory (QFT) technique is used to synthesize a regulatory feedback controller for a robust control of boiler drum-level considering boiler operation across multiple operating points. A simplified linear model is developed using a step test data generated from the boiler simulator based on the semi-distributed nonlinear model. Model parameter uncertainty is considered based on the model-parameter variations across linearized plant-set obtained across different operating point across transient operation. The feedback controller is designed to meet desired disturbance rejection specification. The design is verified through extensive simulations in time domains with several plants picked from the plant-set and simulation results are discussed. The performance of QFT controller is compared and found better against PI controller tuned for the same disturbance rejection specs.
Keywords :
boilers; distributed control; feedback; level control; linear systems; linearisation techniques; multivariable control systems; nonlinear control systems; robust control; time-domain synthesis; transient response; uncertain systems; PI controller comparison; QFT controller performance; SISO QFT technique; SISO quantitative feedback theory technique; boiler drum-level control; boiler operation; boiler simulator; design verification; disturbance rejection specification; feedback controller design; linearized plant-set; model parameter uncertainty; model-parameter variations; regulatory feedback controller synthesis; robust control; semidistributed nonlinear model; step test data; time domain simulations; transient operation; Boilers; Control design; Data models; Mathematical model; Robust control; Robustness; Solid modeling; Boiler Drum Control; Modeling; QFT; Robust Control;
Conference_Titel :
Engineering (NUiCONE), 2013 Nirma University International Conference on
Conference_Location :
Ahmedabad
Print_ISBN :
978-1-4799-0726-7
DOI :
10.1109/NUiCONE.2013.6780175
