Abstract: In recent years, the amount of hydropower development is increasing day by day. In order to save investment, many small and medium-sized hydropower stations with long diversion channels choose to use pressure regulating valves instead of surge shafts to cope with the large fluctuation transition process. However, setting pressure regulating valves cannot reduce the inertia time constant of water flow of units, which will lead to poor dynamic characteristics in the small fluctuation transition process. In order to find a way to improve the dynamic characteristics of the turbine regulating system of the “valve instead of well” hydropower station in the small fluctuation transition process, the small fluctuation disturbance simulation of a conventional hydropower station with a long pressurized diversion channel is carried out, and the dynamic response of the regulating system in the small fluctuation transition process is analyzed. The dynamic response results of the regulation system show that the poor dynamic characteristics of the turbine regulation system in the conventional hydropower station with a long pressurized diversion channel are due to the excessive response speed and amplitude of the servomotor caused by the excessive speed of the governor. A new hydraulic turbine control strategy is put forward, which feeds back the displacement signal of the servomotor to the proportional and differential links of the governor. By restraining the speed and amplitude of the servomotor action, the dynamic performance of the “valve instead of well” hydropower station in the small fluctuation transition process can be improved. Through simulation comparison, this method can effectively improve the dynamic performance of the small fluctuation transient process of the turbine regulating system of “valve instead of well” hydropower station.