Dynamic modelling of the steam power plants

The operation of steam power plants varies from steady state to dynamic state by means of several factors; one of the most important of these factors is load variation. The practices used to control load, cause changes in working fluid properties in the cycle. Some of these properties have significant effects on the efficiency and appropriate operation of the cycle components; therefore, it is necessary to keep their variations in a suitable range. The controllers are used to perform this task and guaranty the correct operation of the steam power plant. The study of the dynamic behavior of the steam power plant is necessary for the selection and regulation of controllers. In this paper, an object oriented and flexible simulator is presented which gives the ability to investigate the dynamic behavior of any steam power plant. The results of this simulator can be used to determine the type of controllers required in steam power plants and their regulating coefficients.