The Theoretical Calculation of Main Steam Pressure for the Sliding Pressure Steam Turbine

Based on variable condition of the governing stage,the theoretical calculation method of main steam pressure for the sliding pressure operation is set forth by means of combining the working feature of governing stage for the nozzle-controlled turbine.Meanwhile,the variation tendency of main steam pressure line is fully analyzed against the influence of temperature fluctuation as well as degree of overlapping of governing stage under sliding pressure operation.So,There is the role of a certain draw to improve the calculation precision of governing stage parameters.