At present

in the construction of distribution automation system

because of the large scale of the distribution network models and frequent changes in operations

the cost of maintenance in contact-graph is too high

and the graphics update operation can not be proceeded timely. Based on the basic idea of automatic graphing

a study is made on the typical connection modes of distribution contact-graph

and a ring layout method is designed for proceeding from outside to inside in succession. A generation process is employed from distribution network models to graph automatically by model extraction

graphic modeling

layout and routing

and compression. The feasibility of the research is verified by specific project application.