The studies has proven that power system is a nonlinear system, also the speed control mechanism is nonlinear. Is it possible to address speed control issue in form of nonlinear system.
Thank you Sudha Balagopalan, I am actually talking about the output speed control of steam turbine system in relation with load/frequency control.
Strictly speaking all systems are nonlinear if we consider the entire range of operation. When we limit the range to linear operation then it becomes a linear system. If the linear model is giving satisfactory results then why to consider nonlinear model. Otherwise we have to go for nonlinear model obviously.
Controlling of steam in Steam Management System (SMS) is a periodic action of adjusting several valves to match a desired set point signal. This used nonlinear dynamic model as a basis. Only primary response of a speed droop characteristics is considered as linear compensation of power to regulate a system frequency. However, it still used dynamic model of valve and controller.