With the development of multi-region interconnected power system,the wind power,photovoltaic(PV)and other new energy power generation are connected to the grid on a large scale,and it is an inevitable trend and urgent need to perform the joint prediction and coordinated scheduling of wind power-photovoltaic power.Starting from the analysis of the spatio-temporal correlation of wind power-photovoltaic(PV)power generation,this paper analyzes and discusses the spatio-temporal coupling of wind power-PV power,modelling of wind power-PV joint forecast,optimization of the parameters of wind power-PV joint forecast model,and pre-dispatch of the power system considering the wind-PV joint forecast.Firstly,the mechanism of wind-PV power interaction in time-space is revealed,a multi-time scale wind-PV power time complementarity analysis method is proposed,a quantitative model for the spatial correlation of wind-PV power generation is established,and a spatial and temporal coupling model for wind-PV power generation is constructed based on a multistage graph convolutional neural network.Based on the results above,a joint prediction method of wind-PV power by integrating heterogeneous graph neural networks is proposed,a joint forecasting model for wind-PV power optimization model of the parameters of the joint prediction model is constructed,and a new energy active power prediction error vector evaluation system is constructed,which provide decision-making supports for the coordinated scheduling and control of the wind-optical joint power generation system.On the basis of wind-optical joint power gener-ation prediction,the wind power and photovoltaic power generation time complementary and spatial mutual aid ideas are used to explore the wind-optical joint power system pre-scheduling strategies and methods,and the wind-optical coordi-nated scheduling strategies at different time scales are dissected and analyzed,and a hierarchical scheduling framework for the combined wind-photovoltaic power generation system with spatial progression of power grid-region-cluster-field station is established.Finally,the prospects in future researches on wind-PV joint prediction and pre-dispatch are put for-ward.
维普
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