Method for 10 kV main and auxiliary line ring grid layout in small-medium urban districts in plain area

Abstract

The invention provides a method for the 10 kV main and auxiliary line ring grid layout in small-medium urban districts in a plain area. A structure that main and auxiliary trunk lines and outdoor ring main units are combined is adopted, and main trunk lines erected by overhead insulated conductors are adopted for connection between an outgoing line of one transformer substation and an outgoing line of the other transformer substation; meanwhile the outdoor ring main units are arranged along a crossroad, lines enter from the main trunk lines, and four lines go out and are connected to branch lines in the four directions; longitudinal lines are erected in a main and auxiliary double-circuit same-pole mode, transverse lines are erected in an auxiliary trunk line one-circuit mode, and the transverse lines are connected with auxiliary lines of the other circuit through column switches; users and other equipment are connected with the auxiliary lines, and the main trunk lines are not connected with any user. By the adoption of the design method, the advantages of cable lines and a hand-in-hand ring network structure are integrated, new materials and new equipment such as the overhead insulated wires and the outdoor ring main units are fully utilized, the structure of a power distribution network is further optimized, and the power supply reliability of a small-medium urban network can be further improved.

Description

Technical field: [0001] The invention relates to the field of power systems, in particular to a method for grid layout of 10kV main and auxiliary line rings in urban areas of small and medium-sized cities in plain areas. Background technique: [0002] After the large-scale transformation of the urban distribution network, the structure has been greatly improved. The single-circuit radial structure in the past has been replaced by the backbone segmented hand-in-hand ring network structure. Many cities have also introduced power distribution automation systems, and the reliability of urban power supply has reached a higher standard. However, with the gradual increase of power customers' demand for power supply reliability, it is difficult to further improve power supply reliability in small and medium-sized cities due to restrictions on funds and construction standards. [0003] On the one hand, the user's power equipment has not been transformed accordingly with the transfor...

AI Technical Summary

Problems solved by technology

In order to further improve the power supply reliability of the distribution network, it is necessary to find a way to limit the power outage range caused by the user equipment to the branch line of the user; the current distribution network structure is impossible to meet this requirement

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