Method for restricting electric field intensity of soil around grounding body and separating soil discharge passage

Abstract

The invention provides a method for restricting the electric field intensity of soil around a grounding body and separating a soil discharge passage, and belongs to the technical field of high voltage. The method comprises the following steps: excavating a trench at a position, needing to be subjected to electric field intensity restriction, around a grounding grid, wherein the depth of the trench exceeds the burying depth of a protected object; building a support wall in a trench in which an insulation wall is buried; pasting adhesives on one side of the support wall close to the grounding body; backfilling fine earth in a gap between the insulation wall and soil and compacting after the adhesives are solidified and the insulation layer is firmly glued; and paving a gravel layer with the thickness of 20cm within 2m in the horizontal direction at the root of the front, rear, left and right ground surfaces of the insulation wall. By adopting the method for restricting the electric field intensity of soil around the grounding body and separating the soil discharge passage, the electric field intensity of soil in part areas around the grounding grid is effectively restricted, the discharge passage of lightning stroke in soil is separated, and pipelines, cables and underground oil tanks around the grounding grid of substations, microwave towers and buildings are protected.

Description

technical field [0001] The invention relates to the field of high-voltage technology, in particular to a method for limiting the electric field strength of soil around a grounding body and blocking discharge channels in the soil by using buried insulating walls. Background technique [0002] With the development of the economy, the demand for electricity in urban centers is increasing. More and more substations are built in the city center. At the same time, there are many pipelines for water supply and communication in the city center, and there are also many refueling and gas stations. Due to the shortage of land resources, there are often water supply and communication pipelines near the substation, and the substation is very close to the gas station, or even close together. In addition, many microwave towers, high-rise buildings, etc. are built next to gas stations. Substations, microwave towers, and high-rise buildings all have reliable grounding devices, which are u...

AI Technical Summary

Problems solved by technology

This method requires long metal wires to be laid. When the pipeline has been buried and the grounding grid is newly built, laying the metal wires is labor-intensive and time-consuming.

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