A drainage grounding method for suppressing ground potential rise

Abstract

The invention discloses a drainage grounding method for inhibiting ground potential rise, which comprises a grounding down lead and a grounding electrode, the grounding electrode is arranged in an original earth diversion area and is connected with the grounding down lead. Also included are a first grounding member and a second grounding member, both of which are disposed in the soil diversion region, and the resistivity of the first grounding member is smaller than the resistivity of the soil diversion region, and the resistivity of the second grounding member is smaller than the resistivityof the first grounding member; and the first grounding member is positioned outside the grounding electrode and in good contact with the grounding electrode, and the second grounding member is positioned below the first grounding member and in good contact with the lower portion of the grounding electrode. The invention can effectively suppress the transient ground counterstrike voltage caused bythe end effect of the grounding device under the lightning impulse, The invention solves the problem that the transient electric potential of the high-voltage transmission and transformation system issharply increased due to the end effect of the grounding device under the lightning impulse in the existing grounding technology, the lightning current cannot be safely and effectively released, theground potential counter-strike voltage is formed, and the safe operation of the power supply system is seriously affected.

Description

technical field [0001] The invention relates to a lightning protection and grounding technology, in particular to a drainage grounding method capable of suppressing the rise of the ground potential and suppressing the rise of the ground potential. Background technique [0002] At present, the difficult problems existing in the grounding technology are: under the condition of impact surge, the grounding body will cause the ground potential to rise due to the end effect and inductive component, which will endanger the safety of personnel and equipment operation. The cause of the end effect of the grounding body is: according to the principle of electromagnetic induction, the electric surge generates a time-varying magnetic field in the scattered soil, resulting in an uneven distribution of the current density along the direction of the grounding body, showing that the current density in the soil near the middle of the grounding body is relatively small. Due to the accumulation...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a drainage grounding method for suppressing the rise of ground potential, which can effectively restrain the rise of ground potential, and solve the problems caused by the end effect of the grounding device under the impact of lightning in the existing grounding technology described in the background art. The rapid rise of the transient potential of the high-voltage power transmission and transformation system, the lightning current cannot be safely and effectively discharged, and the ground potential counterattack voltage is formed, which seriously affects the safe operation of the power supply system.

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