Aiming at the typical problems of low voltage distribution network, such as low status perception level and insufficient data sharing and mining, the project construction content of energy Internet demonstration platform area is combined, and technological breakthroughs are maked through applications in two aspects of“information support”and“value creation”with the construction concept of energy Internet. Firstly, the complete topological information of transformer, line, household, phase, electrical impedance of the station area is constructed based on the longitudinal and transverse conduction characteristics of user load characteristics and fault characteristics in the low-voltage power network, which greatly simplifies the acquisition framework and completes the full state accurate perception of the low -voltage area, so as to realize the efficient utilization of the information perception by high-speed power line carrier. At the same time, the framework of digital business support capability is proposed to explore the typical business scenarios of the energy Internet demonstration area in three aspects of power grid digital management, user digital service and government digital governance driven by data. Through the demonstration application of11 communities in Nanjing, the accuracy of topology identification can reach 100%, and the accuracy of impedance calculation is greater than 90%. At the same time, 603 households in the pilot have completed data mining and sharing.