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In view of the inaccuracy and completeness of the distribution network system diagram in the current power grid, the power network structure and the business characteristics of the power industry are investigated and analyzed. The relationship model between substations is analyzed, and the inheritance circuit layout design idea is applied to the distribution. In the grid system topology diagram. The paper proposes a method of dividing the power supply area according to the line contact relationship, and develops an equal density constrained space layout algorithm. Make full use of the distribution network geographic information (GIS) drawings, carry out the power grid topology and line information maintenance, so that the system diagram covers all electrical equipment on the GIS, and can carry out the original electrical topological relationship of the gemstones, and realize the absence of each subsystem. The seams provide image support for a variety of applications. The experimental results show that the proposed spatial topology algorithm is efficient and easy to implement.

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