Multi-objective optimal dispatching of Hydropower - Photovoltaic - Pumped storage multi-energy complementary system considering water ecological environment

The operation of the hybrid pumping and storage power station leads to the spatio-temporal changes of downstream water quantity and water quality, which have a certain negative impact on the river runoff regime and ecological integrity. In order to balance the goal of power generation and river ecological protection, a multi-energy complementary system is proposed in this study, which takes the discharge volume of the reservoir, the stability of pumping flow of the pumping and storage unit and the minimum change of runoff regime as the objective function. The multi-energy complementary ecological scheduling model is designed to reduce the impact of hydropower station scheduling on river ecology while ensuring the power generation efficiency of the system.