MATHEMATICAL MODEL OF NOZZLE-CONTROL GOVERNING OF STEAM TURBINE

The general mathematical model of nozzle-control governing has been presented. The presented model is the element of mathematical model of steam turbine for determining the turbine performance characteristics at changing operating conditions. Possibility of simplifications of presented model has been discussed. Effect of these simplifications on errors of computed power of governing stage and turbine has been calculated on the example of 13K215 turbine. On this basis a range of simplification and general model application has been estimated.