Abstract:With the improvement and popularization of the primary frequency regulation function of the hydraulic turbine regulation system in recent years, the requirements of the primary frequency modulation function of the hydropower generating unit are also improved. To ensure the safety and stability of the power grid, all the indicators of the primary frequency modulation function should meet the relevant requirements. The factors affecting the primary frequency regulation function of the hydraulic turbine governing system are analyzed. The primary frequency regulation characteristics of the hydraulic turbine governing system in the opening mode and the power mode are analyzed and compared to find out their respective advantages and disadvantages, and corresponding optimization is carried out. By optimizing the primary frequency modulation characteristics in the power mode, the primary frequency modulation performance in the power mode is better than the opening mode, which is more conducive to the realization of the target value expected by the power grid. At the same time, the field test shows that although the primary frequency regulation characteristic in the power mode has great advantages, it can meet the grid requirements to the maximum extent, but there are also some inconveniences, that is, the active power fluctuation is large, and it needs to be in the future. Explore, optimize, and improve in work practice.