Continuously switched linearized models of the nonlinear once-through boiler model

This paper deals with a substitution of the nonlinear once-through boiler model. The substitution is based on a set of the linearized models which are continuously switched according to the value of the boiler power level. The aim is to obtain a model which sufficiently accurately substitutes the original nonlinear model and whose simulation is faster for more flexible advanced control algorithm testing. In the paper two approaches of linearization are mentioned and compared.