Medium voltage cable network networking method

Abstract

The invention provides a medium voltage cable network networking method. The method comprises the steps that 1, a 10KV bus of two substations or different 10KV buses of the same substation in the same power supply area are used as a power supply, wherein lines contact with each other to form a looped network and carry out open-loop operation; 2, a contact normally open point is arranged at each looped network point; and 3, two contact normally open points of each line are arranged in different ring main units, and a contact normally open point in the middle of the line is arranged at the halving point of a line load. When a cable network provided by the invention is in normal operation, each line load is connected with the accessed bus. When a fault occurs, the contact normally open points of the looped network points on both sides of the fault point carry out fault isolation. A load in front of the fault point is connected with an originally accessed bus. A load behind the fault point is connected with a bus which accesses a group line. In a high-reliability power supply area, if a medium voltage cable network networking method is unable to transit to a standard double looped network, the power supply reliability can be improved through the networking method provided by the invention.

Description

technical field [0001] The invention relates to the field of electric power, in particular to a networking method for a medium-voltage cable network with simple wiring, flexible operation and high power supply reliability. Background technique [0002] With the development of cities and the improvement of people's living standards, the demand for electric energy is increasing day by day. For this reason, my country's distribution network has undergone years of construction and transformation, but the foundation of the distribution network is still relatively weak. The network of the medium-voltage distribution network The lack of standardized management of the rack structure, the contradiction between the reliability of the power supply of the distribution network and the needs of users has become increasingly prominent, and the typical wiring modes of the medium-voltage cable network in the prior art include radial type and single (double) ring type. [0003] Among them, the...

AI Technical Summary

Problems solved by technology

[0005] In practical applications, in high-reliability power supply areas, affected by factors such as historical grids and external construction conditions, the networking mode of the medium-voltage cable network cannot transition to the standard double-ring network, and the power supply reliability of the distribution network is limited. serious problem

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