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Flexible Coordinated Optimal Operation Model of "source-grid-load-storage" in Smart Distribution Network

The smart distribution network featuring distributed generation (DG) and ubiquitous flexibility resources faces three challenges: low energy and resource utilization, difficult operation optimization, and lack of interaction with large power grids. Therefore, the comprehensive coordination and interaction mechanism of "source-grid-load-storage" is firstly elaborated. Secondly, a flexible coordinated optimal operation model of " source-grid-load-storage " in distribution network applied to coordinated optimal dispatch of transmission and distribution is established, in which the uncertainties of the wind power and photovoltaic is addressed by multi-scenario technique. Then the Big-M technique and second-order cone relaxation technique are adopted to the nonlinear processing of the proposed model, which is transformed into mixed integer second-order cone programming (MI SOCP) problem for solution. Finally, the effectiveness of the model is verified by improved IEEE 33-bus system.