Outgoing cable maintenance method based on temporary mobile power supply application

Abstract

The invention provides an outgoing cable maintenance method based on temporary mobile power supply application, and the method comprises the steps: selecting a tower for live-line on-load opening tension operation, and enabling a temporary mobile power supply primary grid-connected cable to be in live-line lap joint with a load side of a demarcation point switch; lapping a temporary mobile power supply primary grid-connected cable on the load side of the demarcation point switch in a hot-line work mode to start first grid connection, and lapping a temporary mobile power supply secondary grid-connected cable on the mains supply side of the demarcation point switch in a hot-line work mode to start second grid connection; and judging whether to perform automatic closing operation on a secondary grid-connected switch in a temporary mobile power supply based on a phase sequence checking result of the temporary mobile power supply and a system power supply. Through a primary grid connectionor secondary grid connection mode, the position of the cable on the pole is isolated by using a demarcation point switch, so that a user on an overhead line can still maintain normal power utilizationwhile the outgoing cable is replaced and reconnected in a power failure, and the household number loss caused by the replacement and reconnection of the outgoing cable in the power failure maintenance and displacement process is avoided or greatly reduced.

Description

technical field [0001] The invention relates to the method field of distribution network maintenance, in particular to an outgoing cable maintenance method based on a temporary mobile power supply application. Background technique [0002] In the process of urbanization and urbanization, due to the needs of municipal construction, some road sections where overhead line outgoing cables are laid or buried are often excavated and repaired. At this time, it is necessary to relocate and reroute the outgoing cables in the live running state. [0003] For the line of the ring network or the connection wiring, the outgoing cable can be powered by the opposite side power supply II through the power switch mode, so as to ensure that the power consumption of the users on the line is not affected, and the power failure, displacement, replacement and reconnection are carried out, such as figure 1 shown. [0004] When the excavation and repair area occurs in the buried section of the ou...

AI Technical Summary

Problems solved by technology

[0005] But for the radial structure line without opposite side power supply II, such as figure 2 As shown, when the buried section of the outgoing cable of the power supply is excavated and repaired due to the needs of municipal engineering construction, etc., because the excavation and repair occurs at the head of the power supply of the overhead line, the radial structure overhead line in the rear section will be completely blacked out. As a result, user 1, user 2, user 3, user 4, and user 5 are accompanied by shutdown, and the user 1, user 2, user 3, Power supply for user 4 and user 5

[0006] Usually, the excavation and repair work of such municipal engineering construction or the displacement, replacement, reconnection and reconnection of outgoing cables often last for several hours, so for power supply companies, there will be a large loss of households during power outages, which seriously affects the reliability of power supply for power supply companies Sex and power business environment, and customer satisfaction with electricity

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