A method for replacing overhead conductors in distribution network

Abstract

The invention relates to the field of methods for overhauling power distribution networks, in particular to a method for replacing overhead wires of a power distribution network, comprising: acquiring information on overhead wires of a power distribution network to be replaced; There are several sections to be replaced; when the overhead wires of the distribution network are replaced by sections, the section switches at the front and rear ends of the section to be replaced are in broken position, and the inner side of the section switches at the front and rear ends are powered off so that the overhead wires can be replaced. The outside of the sectional switch has power access conditions; when replacing the overhead wires of the distribution network by section, install the sectional switch on the penultimate second base tower before the rear end sectional switch in the direction of line replacement. The penultimate first base tower shall be opened and subjected to tension treatment in advance, the starting point and end point of the original overhead wire replacement shall be changed alternately, and the entire overhead wire shall be replaced in sequence. The present invention realizes all power outage operations in a section, does not affect the normal power consumption of users in other sections, and has controllable safety risks.

Description

technical field [0001] The invention relates to the field of distribution network maintenance methods, in particular to a method for replacing overhead conductors of a distribution network. Background technique [0002] With the continuous development of the national economy and the continuous advancement of urbanization and urbanization, more and more projects are replacing the original overhead bare wires of the distribution network with overhead insulated wires. On the one hand, the replacement of overhead insulated wires can reduce the operation failure of the distribution network Efficiency, improve the grid operation and maintenance level and power supply reliability, and at the same time, it can solve the contradiction between tree lines and beautify the urban landscape. [0003] Usually, in the above-mentioned replacement process of distribution network overhead conductors, considering the operators, equipment, safety risks, etc., it is necessary to control the workl...

AI Technical Summary

Problems solved by technology

[0004] For the replacement of overhead bare wires with overhead insulated wires in a section between two section switches 10 and 20, there are the following problems: When the power supply I internal outlet cable interval switch and the 10, 20 switches are pulled, the section The large side of the switch 20 is electrified due to the reversing of the power supply II, and the large side of the tower 200 is electrified, so maintenance personnel cannot board the tower 200 to disassemble and assemble the small side fittings in order to hang the newly replaced insulated wire fittings. , the replacement work of the overhead line between the two section switches 10 and 20 cannot be completed

However, when this kind of live work coordination is carried out, it is easily affected by terrain conditions and meteorological conditions, and there is a possibility that the operation cannot be carried out and cannot be carried out smoothly.

[0006] Another solution is: since the on-site environment usually cannot meet the parking requirements of live working vehicles, it is not possible to replace the fittings on the 200 small side of the pole tower (the 20 small side lead wire of the section switch) during live work so as to hang the overhead For insulated wires, the overhead wires are generally replaced by expanding the power outage range, that is, disconnecting the power supply I internal outlet cable interval switch and the 10, 20 and 30 segment switches, and replacing the A-section overhead wires, but doing so will bring Two disadvantages: 1. It expands the scope of power outages, causing users 3 and 4 on the B segment outside the operating range to accompany the power outage, which reduces the reliability of power supply, reduces the satisfaction of users with electricity, and affects the power business environment

2. When the line in section A is replaced with an insulated line, the users on the line in section B are caused to have a power outage. In the case that the work vehicle cannot be in place to cooperate with the disassembly and assembly of fittings, the scope of power failure can only be expanded, and the 10, 20, 30, and 40 segment switches are disconnected to replace the overhead wires of the B segment

At this time, when the overhead wire of section A has been replaced in the previous period, user 1 and user 2 are disabled. At this time, due to the replacement of the overhead wire of section B, it will again cause user 1, user 2 of section A and user 5 and user 6 of section C. Accompanied parking, the result is that in addition to the increase of accompanying parking users within the range of C, users within the range of A and B will have repeated and frequent power outages, which seriously affects user satisfaction with electricity use

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