In recent years

there has been a rapid development of demand-side flexibility resources

such as flexible loads

energy storage

electric vehicles

etc. These resources can flexibly regulate the consumption and storage of electricity without affecting the quality of electricity consumption and user experience

and can better maintain the stable operation of the power grid. However

given that most of the demand-side resources have small capacity

different characteristics and are scattered at the bottom layer

their integration into an aggregated model is usually considered in practical scheduling. For this

a feasible region approximation and efficient aggregation method for demandside resources based on improved zonotope is proposed. Firstly

the feasible region of individual demand-side resources is approximated by the zonotope based on the bottom-up idea

and the general construction form of the zonotope generator is proposed to further improve the approximation accuracy

and finally the aggregation model of demand-side resources is obtained based on the Minkowski sum and the validity of the model proposed in terms of computational accuracy and speed is verified through the analysis of the calculation examples.