This paper presents a numerical analysis and calculation procedures of the primary parameters of steam turbine unit under operation
such as initial steam temperature
condenser vacuum
feed water temperature
terminal temperature difference of heaters
etc.A domestic 300 MW turbine unit manufactured with foreign licence was analyzed and calculated.The results are found to be very helpful to power plant operators for their economic operation.They also provide an important basis for energy sonsumption analysis and an assistant tool for analyzing equipment failure in the power plant.