Control strategy for hydro-electric units based on dynamic model of vibration zone in electric dispatch main station AGC

In view of the difficulty in satisfying the vibration zone striding demand because of the unclear vibration zone modeling method in the area power grid automatic generation control (AGC) software, a telemetering information-based dynamic vibration zone modeling method of unified control for the electric dispatch main station is proposed. Based on the dynamic model, the method for dodging or striding over the vibration zone of the hydroelectric units in the main station of the AGC system is further discussed. According to different base-point control modes, discussion is made on the control logic of pulling back the unit output power fluctuation from the vibration zone after getting into it and striding over it on its own. On the premise that the hydroelectric units´ security is ensured, the continuous regulation within the valid regulating area of the hydroelectric units can be realized by making full use of the regulating advantages of hydro-electric units. Test results from actual systems show that the method proposed can effectively improve the security of the AGC system of hydroelectric units and the area regulating effects.