A method for checking and repairing the lower 500kvgil tubular busbar under the condition of not accompanying the shutdown

Abstract

The invention relates to a method for overhauling a lower 500kV GIL tubular bus under a non-accompanying stop working condition. The method comprises the steps of GIL equipment gas management, high-quality, safe and efficient overhauling of a 500kV lower GIL tubular bus under a non-accompanying stop working condition, and recovery of GIL equipment gas chamber management. Only the to-be-overhauledlower GIL equipment needs to be powered off, the power failure range does not need to be expanded, and the power supply reliability of the system is improved. The output load is increased. Potential safety hazards are small, and safety risks are few and controllable. Working face intersection is little, and the safe and civilized construction appearance is guaranteed. The continuous working time is short, and the working efficiency is high. The limitation of insufficient safety distance is small.

Description

technical field [0001] The invention relates to a method for overhauling a tubular busbar, in particular to a method for overhauling a lower layer 500kVGIL tubular busbar under the condition of not accompanying a stoppage, and belongs to the field of electric power overhaul. Background technique [0002] The 500kV GIL tubular busbar is an important device for the connection between the 500kV GIS and the 500kV outgoing high-voltage bushing. The combination of GIS and GIL tubular busbar greatly saves the floor area, maintenance (installation time), equipment maintenance investment, etc., due to its obvious advantages Outstanding, widely used in substations and converter stations with voltage levels of 500kV and above. Considering the convenience of maintenance and expansion, the three phases A, B, and C of the 500kV GIL tubular busbar are mostly arranged horizontally on the upper and lower layers. The standard section length is 12 meters, the outer diameter is 0.6 meters, and ...

AI Technical Summary

Problems solved by technology

During the same shutdown period, the upper layer of the GIL tubular busbar is removed first, and then the lower layer is removed. However, when restoring, the lower layer must be restored first and then the upper layer, so there must be a period of time that will be consumed while waiting

Adopting the method of simultaneous stop, multiple points, wide fronts, long working face and narrow working face will bring many problems: 1. The scope of power outage is expanded, and the reliability of the system is reduced.

2. The output load drops

3. There are many intersections in the working face, which leads to great potential safety hazards, and the appearance of safe and civilized construction is poor.

4. Unnecessarily consuming more time and lower work efficiency

5. Restricted by insufficient safety distance, work efficiency is not high

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