Intraday Operation Optimization Strategy of Multi-Energy Power System Based on Characteristic Parameter Identification

Aiming at the problems of wind, solar and hydropower abandonment existing in the current multi-energy power system, this paper constructs a multi-energy power system with wind, solar, hydropower and thermal, and formulates the intraday operation optimization strategy of the system. On the premise of ensuring the minimum technical output of thermal power and the firm output of hydropower, the priority is wind, solar and runoff power generation, and the second priority is adjustable hydropower. If the load cannot be met, the thermal power units are selected for power generation. Based on the multi-energy power system, three parameters which are stability index, peak load regulation capacity ratio and intraday operation cost are proposed to identify the characteristics of the system. Finally, a case is given to show that the optimization strategy and parameters can improve the consumption of renewable energy and produce economic benefits, and the advantages of multi-energy power system in complementary generation are proved.