With the further deepening of power market reform, flexible loads have become the focus of attention for power supply and demand. In the context of new power systems, it is necessary to consider the potential of flexible load dispatch on the side of the customer for power demand response research. Based on this, a typical flexible load is selected in the community, and an economic model with minimum cost is established as the objective function. This model is used to regulate the power load curve and achieve valley filling and peak shaving. Additionally, considering different weather conditions, the calculation example analyzes the effect of flexible load participation in regulation under various environments and combines the time-of-use tariff for dispatch. The results can flexibly and effectively guide users to participate in demand response, reduce economic input on the user side, and meet the higher requirements of flexible demand-side regulation resources to support the safe operation of the power system, which has certain application potential and economic value.