Substation power grid comprehensive grounding lead-out wire construction method

Abstract

The invention discloses a substation power grid comprehensive grounding lead-out wire construction method. The method comprises the steps of firstly, manufacturing a sleeve and a water stop ring, welding the water stop ring to the outer ring of the sleeve, brushing two layers of zinc-rich paint at a weld joint, and brushing a layer of antirust paint; penetrating a grounding lead-out wire into thesleeve, arranging an insulating fixing ring between the grounding lead-out wire and the sleeve, respectively pouring epoxy resin fillers from two ends of the sleeve; after the epoxy resin fillers arecompletely solidified, arranging the bottom end of the sleeve on a civil engineering cushion layer; welding the grounding lead-out wire at the bottom end of the sleeve to a grounding grid; locating the water stop ring at the position of a civil engineering bottom plate; and enabling the top end of the sleeve extends out of a concrete backfill layer located above the civil engineering bottom plateto complete construction of the grounding lead-out wire. According to the method, the defects of traditional grounding lead-out wire construction are overcome; the construction period is effectively shortened; quality errors possibly occurring in construction operation are reduced; and the reliability of grounding lead-out wire arrangement and a traction substation grounding system is ensured.

Description

technical field [0001] The invention relates to the technical field of building electrical construction, in particular to a construction method for an integrated grounding lead wire of a substation power grid. Background technique [0002] With the development of urban construction, the rapid growth of high-speed railway and urban rail transit, the traction load of locomotives increases accordingly, and the return current of traction substation also increases. The grounding system of the traction substation faces two serious problems. One is that the backflow current causes the potential of the ground grid to be unequal. It will seriously affect the protection, measurement and signal systems, and may cause malfunction or refusal of the protection system. Secondly, when the locomotive is running, starting, braking and other operations cause the bus current fluctuation to increase, and the electromagnetic signal generated by the current fluctuation will interfere with the sig...

AI Technical Summary

Problems solved by technology

To sum up, in the comprehensive grounding construction, the overall span of the construction of the grounding lead-out line is relatively long (about 20-50 days)

At the same time, due to the operation of construction workers, etc., it is inevitable that there will be some quality errors

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