Three-line two-section two-connection medium-voltage overhead main distribution network and its construction method

Abstract

The invention discloses a three-circuit, two-segment and two-tie medium-voltage overhead main power distribution network and a building method thereof. The power distribution network comprises a first primary power supply segment, a second primary power supply segment, a third primary power supply segment and a triangular power supply structure, wherein the first primary power supply segment is built by a first end power supply, the second primary power supply segment is built by a second end power supply, the third primary power supply segment is built by a third end power supply, the triangular power supply structure comprises a first secondary power supply segment, a second secondary power supply segment and a third secondary power supply segment which are connected in a head-to-tail way and are in a triangular shape, and a wiring structure is arranged on each of the first secondary power supply segment, the second secondary power supply segment and the third secondary power supply segment and comprises a segment switch in a normally closed state and a connection switch in a normally open state. The power distribution network adopts a two-circuit, two-segment and two-tie structure, the structure is relatively independent, is relatively high in load transfer capability, is simple and reasonable and is particularly applicable to rural areas and new city regions, and the actual requirements of transportation inspection, dispatching and marketing management are met.

Description

technical field [0001] The invention relates to a medium-voltage overhead main distribution network and a construction method thereof. Background technique [0002] According to "Technical Guidelines for Distribution Network Planning and Design" (Q / GDW 738-2012), "Code for Urban Distribution Network Planning and Design" (GB 50613-2010) and "Guidelines for Planning and Design of Rural Power Networks" (DL / T 5118) , The typical structure of the medium voltage overhead distribution network includes: single radiation connection, single connection connection and multi-section moderate connection connection. [0003] The above three standard wiring methods, in the construction of traditional medium-voltage distribution network, due to factors such as the geographical distribution of load points, road direction and growth characteristics, may easily cause deviations between the actual grid and the planned grid target. Although it has undergone rolling revisions and rectifications y...

AI Technical Summary

Problems solved by technology

[0005] Especially for some power supply users located in rural areas and new towns, due to constraints such as power substation layout, medium voltage line power supply radius, power supply capacity, and power supply quality, the economic level of operation of a large number of backbone distribution networks is not high

The coexistence of heavy load and light load, the occupation of substation interval resources and low line load level directly lead to low power supply level and power supply capacity for users, and it is difficult to guarantee the reliability of power supply for users

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