Modeling Method of Non-linear High Order Different Capacity System

Taken the thermal power plant super-heater temperature as research background, to explore a modeling method of high order with different capacity part, which can describe a class of nonlinear system effectively, the dynamic characteristic of super-heater temperature with controlled object can be described by a unified mathematic model which is with the same capacity characteristic, and taking full account of different capacitive characteristic of controlled object, it is taken four-orders system as basement, the simulation tests have testified the validity of the modeling method, the system with different capacity characteristic can learn modeling method of same capacity system, when they with many transfer functions. It has expanded the research area of system with nonlinear characteristic. From the simulation test, it is obvious that the two models have some similar characteristics, which when load increase or decrease from the same load rate with the same trend.