Optimal selection analysis method of MVDC distribution network planning considering urban scenario demand

In view of the problem that there is no quantitative analysis method for the construction priority of multiple MVDC(Medium-Voltage DC) distribution networks in the urban distribution network planning, an optimal selection analysis method for MVDC distribution network planning objects considering the urban scenario demand is proposed. A comprehensive index system of urban MVDC distribution network planning and optimal selection is established from three aspects of power supply quality improvement demand, urban scenario demand and distribution network economy. In terms of power supply quality improvement demand, the gap between the target levels is considered. In terms of urban scenario demand, the construction limitations of MVAC(Medium-Voltage AC) distribution network and the construction driving force of MVDC distribution network are considered. And in terms of economy, the severity of power loss cost is concerned. Then, the qualitative indexes are quantified by cloud model, the comprehensive evaluation values of each distribution network are calculated based on the hierarchical additive weighting of Delphi entropy weight method, and the distribution networks are sorted according to the values. Under the constraint of annual total investment, the optimization of planning objects is realized by taking the maximum comprehensive evaluation value of scheme as the objective function, so as to arrange the construction priorities of multiple MVDC distribution networks. The distribution network in a certain region is taken as an example to verify the practicability of proposed method. © 2021, Electric Power Automation Equipment Press. All right reserved.