Radial structure overhead line relocation method based on uninterrupted power supply requirements

Abstract

The embodiment of the invention provides a radial structure overhead line relocation method based on an uninterrupted power demand. The method comprises the following steps: carrying out live-line on-load strain opening operation on a determined tower in a live-line operation mode; conducting phase checking out on an overhead line and a lower pile head of a newly-installed section switch; using asingle-phase arc extinguishing switch or a bypass load switch for breaking a tension lead which is changed into any end of a tension rod in a live-line work mode, dismantling the tension lead which ischanged into the tension rod in a live-line work mode, unloading the overhead line part and dismantling hardware fittings; and returning to the tower with the broken strain lead, and unloading the overhead line part which needs to be connected with a cable, thereby finishing the line disassembling work of the overhead line and the operation of pulling out the pole. An overhead line is shunted byadopting a mode of connecting a newly-installed section switch and a newly-laid cable in advance, the overhead line needing to be connected with the cable is replaced, the overhead line part needing to be connected with the cable is dismantled by adopting a live-line work mode, power is supplied uninterruptedly in the whole process, and the household number loss during power failure is reduced.

Description

technical field [0001] The application belongs to the method field of distribution network maintenance, and in particular relates to a method for relocating overhead lines with a radial structure based on the requirement of non-stop power supply. Background technique [0002] With the continuous development of the national economy and the continuous advancement of urbanization and urbanization, the distribution network often needs to carry out line relocation work in order to meet the needs of municipal engineering construction. The whole section of overhead line needs to be changed to cable laying, so as to beautify the urban environment and improve the level of line operation and maintenance. Among them, users on overhead lines may be accompanied by power outages. For the ring network structure line with opposite side power supply, if figure 1 As shown, power can be supplied to users through the reverse transmission of the power supply on the opposite side, but for overh...

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Problems solved by technology

[0004] But for the radial structure line without opposite side power supply II, such as figure 2 As shown, when the area where the overhead line is changed to a cable occurs on the overhead line, since there is no load transfer scheme for the power supply on the opposite side, the implementation of the "up-down" project during a power outage will result in user 1, user 2, user 3, user 4, User 5 will accompany the shutdown, and the power transmission can not be resumed until the "upgrading and lowering" project is completed. Therefore, for overhead lines, there will be a large loss of households during power outages, which will seriously affect the reliability of power supply and the power business environment, as well as users Electricity Satisfaction

[0005] Although part of the work of changing overhead lines to cables is carried out in the above-mentioned radiating structure overhead lines, it is also possible to use temporary mobile power supply access in the unmaintained area at the rear of the overhead line to achieve continuous power supply to users, but due to temporary mobile power supply access It is often necessary to have the necessary work site on site to provide temporary mobile power generation vehicle parking and cable access. At the same time, the capacity of the mobile power generation vehicle itself may not be able to meet the load constraints of users on overhead lines, resulting in temporary mobile power supply access to users. The power supply scheme is subject to many restrictions and cannot be carried out

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