Abstract:In the development process of the electricity market, the initial medium and long-term electricity trading and the final spot electricity trading are organically connected through medium and long-term phased trading. Establishing a time of use electricity pricing mechanism can guide users to agree on hourly electricity prices, shifting from the traditional monthly "fixed price" model to a monthly "24-hour electricity pricing" model. This article provides a specific implementation model for retail time of use user settlement in the spot market. Based on the monthly total electricity consumption, the first settlement electricity fee is calculated for users. After accurately calculating the electricity fee, the difference between the two settlement results is used to supplement the first settlement electricity fee. The application of this method not only ensures settlement efficiency but also further improves the accuracy of electricity fee settlement results. At the same time, an example of designing a digital system for calculating retail time of use user electricity bills is provided. The innovation of settlement models and the strong support for the implementation of time-sharing trading mechanisms further stimulate the flexible adjustment ability of the user side, providing exploration and practical cases for the construction of new power systems.