Study on the Influence of Main Steam Pressure on the Dynamic Response of Steam Turbine

The traditional steam turbine model used in stable power system calculations considers the boiler as an infinitely large heat storage element, assuming the main steam pressure to be a constant value. However, during actual unit disturbance processes, fluctuations in the main steam pressure occur due to changes in the boiler’s heat storage state and turbine valve openings, rather than remaining constant. Therefore, neglecting the influence of main steam pressure leads to a significant decrease in simulation accuracy. This paper, based on the traditional steam turbine model, establishes a more detailed turbine model through mechanistic analysis and investigates the impact of main steam pressure on the dynamic response of the steam turbine through simulation studies.