Abstract: Applying visual analysis technology to the power system can effectively solve the massive power data analysis and display problems caused by the development of the power system, thereby assisting the power sector in making decisions. Based on the city power data, a graph-based power data visual analysis method is proposed. Firstly, the urban power supply data is preprocessed, then the urban power supply network is modeled. Finally, according to the visualization principle, different visualization methods are designed for the visualization and analysis of multiple power data in the urban power supply network. Based on the case study of power data in a certain area of Hefei City, it is shown that this method can effectively reflect the operating status of power systems and the distribution of power customers in a certain area.

Key words: power data, visual analysis, graph, urban power supply network