Tahani - Tavanir Company Tehran – Iran

There is an increasing demand for the integration of all control and 6 monitoring functions in modern power plants into one plant-wide system. It has the advantage of giving plant operators centraf control of pfant's operation and performance. And it has become feasibfe with the help of fuzzy controffers in distributed schemes. In this paper, new controfler designs based on the approximate reasoning for controlling the thermal power plants in the run back conditions has been devefoped.