Analysis of the stage group efficiency of steam turbine based on the unified model for coal-fired power unit

During actual operation of the unit, the group efficiency inevitably deviates from the design value and influences the unit heat consumption rate. This paper conduct a series of turbine stage efficiency analysis of the influence of unit energy consumption based on the basic equations for economic analysis, combined with the variable condition of steam turbine model. 1000 MW unit produced by DFSTW as the research object, this paper calculates the load of several groups of different stage group efficiency, and the amount of change of the unit coal consumption. Summarizing, this paper analyses the stage group efficiency influence on the power supply coal consumption rate of the unit, and the variation of stage group efficiency influence on the unit energy consumption with the load change. The results can provide great reference for the operation optimization of thermal power unit. (paper)