Optimization Research on Nozzle Governing 600MW Steam Turbine Operation

An operation mode called hybrid sliding pressure operation mode, which considered the valve point and operation load together, was proposed in this paper based on the analysis and study of a large number of unit operation optimization methods. In addition, according to the steam-excited vibration occurred during the optimization process when the nozzle governing steam turbine switch single valve to multi-valve, the steam distribution optimization project was also proposed. This comprehensive operation project considering the steam-excited vibration problem was applied to a 600MW steam turbine unit, the optimal sliding pressure curve and the optimal operation mode were obtained, and the steam-excited vibration problem was solved successfully. Compared with the previous operation optimization mode, this mode is more accurate and safer for the actual operation.