Generalized Energy Storage And Transmission Network Collaborative Planning Considering Wind Load Fluctuation Similarity

The access of large-scale new energy sources and the increasing mismatch between source and load will lead to blockage of transmission lines and increase the pressure of peak regulation of the power grid.The use of generalized energy storage resources composed of traditional energy storage and controllable loads can improve the power supply structure,optimize the regulation capability,and delay the expansion of the power grid.Based on the forecast of wind power and load,the coordinated planning of generalized energy storage and transmission grid is studied.The main work is as follows:1)The prediction accuracy of wind power is severely affected by the randomness and volatility of wind energy.The prediction accuracy can be improved by digging the high-order characteristics between the different fluctuation degree of wind speed and the predicted power.First,the swing window algorithm is used to identify the fluctuation process of wind speed,and the generalized priority search neighbor algorithm is used to cluster the degree of fluctuation.Secondly,in order to enable the error correction process to be carried out simultaneously between layers and within layers of the network model,a deep recursive belief network consisting of a forward generation network and two horizontal and vertical error feedback networks is constructed.Finally,the deep recursive belief network is trained according to different fluctuation processes and wind power prediction is performed.2)Under the condition of high wind power penetration,the net load peak-to-valley difference increases,causing short-term blockage of the transmission grid.These problems can be reduced by optimizing the operation of generalized energy storage resources.Firstly,the fluctuation curves of daily net load are aggregated.Then,considering the similarity constraint between the net load fluctuation and the generalized energy storage output,the coordinated planning model of the generalized energy storage and the transmission network is established with the investment cost optimization objective of the transmission network and the generalized energy storage.Finally,the largest daily net load curve is selected as the typical scenario in each aggregation result.By coordinating generalized energy storage resources and optimizing the net load fluctuation curve,a generalized energy storage and transmission grid planning scheme with both economy and equipment utilization is obtained.