Analysis on Supporting Potential of Flexible Loads to Power Grid Operation from Perspective of Distribution Network Planning

With the large-scale access of flexible resources at the source and load side to the power grid, the problems of unbalanced supply and demand, larger peak-valley difference, and lower operating efficiency have become increasingly prominent, which brings new challenges to power grid planning. Therefore, it is urgent to analyze the supporting potential of flexible loads to power grid. This paper first introduces the power consumption characteristics of three common load types, namely commercial load, industrial load and residential load, and establishes response models according to their characteristics. Then, according to the demand response strategy of time-of-use electricity price, the user-side load interaction model is established with the goal of economic cost and peak-valley difference comprehensive optimization. And then the supporting potential of flexible loads is analyzed. Finally, an example is given to analyze the interaction effect of flexible loads under different adjustment proportions, and the effectiveness of the user-side load interaction model is verified.