Short Term Optimal Scheduling Of Wind-solar-hydro Power Based On Multi-energy Complementary Characteristics

As the continuous promotion of energy transformation in human society,the level of development and utilization of clean energy has been rapidly improved.The research and practice of coordinated operation of multiple energy sources to improve the absorption level of new renewable energy sources such as wind power,photovoltaic power,etc.,ensure the safe and stable operation of power grid,and improve the utilization efficiency of clean energy have been widely explored.Based on the engineering background and power supply structure of Yunnan Province,this paper analyzes the complementarity of water and wind energy,further proposes the concept of equivalent power station,and studies the short-term optimal scheduling of water and wind energy complementarity based on the characteristics of multi energy complementarity.Finally,it constructs the classic scenario of wind power photovoltaic,and studies the coordination scheduling of water and wind energy complementarity based on the classic output scenario of wind power photovoltaic.Based on the engineering background of Yunnan Province and the characteristics of its power supply structure,this paper summarizes the research progress in the field of multi energy complementary research.Facing the problem of coordinated operation of water,wind,photovoltaic and hydropower,this paper analyzes the complementary characteristics of wind power,photovoltaic and hydropower in the province from multiple perspectives,and proposes the representation and evaluation index system of the complementary characteristics of water and wind based on previous studies.Secondly,based on the above analysis of the photovoltaic output characteristics of wind power,the cascade short-term peak regulation model is constructed,and the concept of equivalent power station model is proposed.The equivalent power station is constructed based on the network location of the power station and the complementarity of water and wind,and the cascade hydropower participates in the short-term peak regulation to take into account both peak regulation and wind absorption.Through the case analysis of Yunnan Province as the engineering background,the equivalent power station model is put forward Compared with the equivalent load model,the model is proved to be effective in peak load regulation and wind load reduction.Finally,based on many researches on the uncertainty of wind power output,this paper discusses the idea of generating wind power typical output scenarios based on wind power photovoltaic output.Based on the theory of scenario method,the improved k-means clustering algorithm combined with PFS effectiveness index is applied to extract wind power typical output scenarios,and the optimal clustering number of wind power classic output scenarios is obtained.When the wind power classic output scenarios are generated through scene fusion,the optimal clustering number of wind power classic output scenarios is obtained The sequence scene set,combined with the short-term optimal operation model of water wind complementary coordination,is used to analyze the peak shaving results under different wind power situations,which proves that the generation method of wind power classic scene is superior.