Abstract: The importance of the application of the field bus control technology in the thermal power plant is expounded from the angles of the digitized power plant and the physical and functional distribution of the control system. The technical characteristics of the field bus control technology were analyzed. The successful experiences of the field bus technology application in abroad thermal power plant were discoursed. Based on the situation of the domestic intelligent field devices, the design philosophy and the application scope of the field bus control technology used in domestic thermal power plant were put forward.

Key words: field bus control technology, bus protocol, intelligent field device