Modeling of Evaluation Index System for Coordinated Operation of Wind-solar-hydro Multi energy Complementary Systems at Multiple Time Scales

The coordinated operation of multiple energy complementary power generation is gradually becoming the development direction of future power systems, and accurate analysis of their complementary characteristics is also particularly important. Although the current research on the characteristics of multi energy complementary power generation systems mainly focuses on calculating simple single evaluation indicators and has achieved fruitful results, there are problems such as a single evaluation scale and chaotic indicator classification. In response to this issue, this article constructs an indicator framework that comprehensively reflects the complementary characteristics of wind-solar-hydro. The entropy weight theory is used to scientifically assign and recombine different evaluation indicators to reveal the operational characteristics of wind-solar-hydro multi energy complementary power generation systems at different time scales. Based on this indicator system modeling, taking a hydroelectric power plant, photovoltaic power plant, and wind farm in a certain area in southwestern China as an example, the multi time scale characteristics of wind-solar-hydro multi energy complementary power generation were analyzed. The results indicate that the power output of the wind-solar-hydro complementary power generation system can exhibit different load tracking performance in different time scale scenarios. Increasing the time scale will cause a decrease in load tracking. Understanding this law can provide reference for the formulation of power system scheduling plans.