User-based DR flexibilityUnder the big data environment, processing the information in the smart grid has changed dramatically. From the users’ perspective, electric energy consumption has changed from the traditional passive acceptance to the current active participation. The DR flexibility analysis on the user side is of great significance based on the new information on energy consumption in the power grid. It can accurately judge the flexibility shown by the user side, thereby improving the information energy consumption, playing a vital role in optimizing and adjusting the entire power information system and the relevant resources and energy in the power system [19, 20]. While analyzing the DR flexibility, crucial factors include power consumption level, power consumption stability, power consumption tendency, and load changes. Functionally, some of the above factors can play a positive role in DR, while some cannot. In DCA, cluster centers characterize the stability of electricity load; for this feature, user entropy can be used for analysis, and the corresponding equation expression is: