A Short-Term Scheduling-Control Synergic Model of Hydropower Units for Hydro-Wind-Solar Complementary Operation

As wind and solar energy are increasingly integrated into the power grid on a large scale, the uncertainty of renewable energy will impact the stable operation of hydropower units (HUs) in the hydro-wind-solar hybrid energy system. Previous researchers have explored the scheduling and control modeling of hybrid energy systems from two dimensions: scheduling at the 15-minute time scale and control at the 1-second time scale. However, this separated modeling method affects the accuracy of the simulation modeling and makes it difficult for managers to capture the multi-time scale response characteristics of HUs. Due to this, a method to combine the optimal scheduling model with the dynamic control simulation model is proposed in this work: the scheduling results at the 15-minute time scale are input into the dynamic control simulation model in power regulation mode, then the control model yields the dynamic response process of the HU at the 1-second time scale. The results can reflect the power response process of HUs on both 15-minute and 1-second time scales, and it can help operators clarify the dynamic response of HUs when regulating wind and photovoltaic power output in the hybrid energy system.