Abstract: Considering the influence of the randomness of distributed renewable energy output on the implementation effect of the control strategy, the day-ahead scheduling technology based on voltage risk assessment and active reconstruction was studied. Based on the photovoltaic output prediction and load prediction, this paper takes the minimum probability risk of voltage safety as the goal, and the opening and closing contact switches as control variable. A second-order cone relaxations Distflow flow model was applied to solve and obtain the distribution network reconstruction plan with the minimum voltage safety probability risk. Through the analysis of the IEEE 33 node distribution network, the simulation results verify the feasibility of the proposed day-ahead loss reduction strategy based on voltage risk assessment and active reconstruction.

    Key words: day-ahead scheduling; second-order cone relaxations; Distflow flow model; distribution network reconstruction; loss reduction