Abstract
This work analyzes the feasibility of applying feedback linearization technique to the nonlinear control of superheater steam pressure and power output of a boiler-turbine generating unit. A nonlinear coordinated controller has been designed and evaluated through computer simulation using a well-established and validated nonlinear boiler-turbine model. The simulation results are presented to illustrate the performance of a nonlinear coordinated control system and compare the proposed strategy with the conventional direct energy balance control strategy. The simulation results show that improvement can be achieved in control with a nonlinear control system. The real benefits obtained include improved dispatch rate, tighter regulation of steam pressure, and reduced maintenance over a wide range of operating conditions, and these improvements in control can be maintained for large changes in operating conditions.
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