I. Introduction
With the concept of carbon neutrality taking root, various building areas are undergoing low-carbon transformation and upgrading of their energy systems. For example, Hangzhou Pan-Asian Games has undergone a low-carbon transformation at a mature level, with 23% energy efficiency improvement in the main venue, more than half of non-fossil energy generation, and 99% power supply reliability, actively promoting green and low-carbon sustainable development. Many high-rise buildings or public buildings are also experiencing smart energy transformation, but due to the late deployment of relevant sensor monitoring equipment, the energy system operation history data are limited, and the existing data are of large magnitude. Low-carbon transformation of these buildings is a very critical task.