Arrangement structure of transformer substation grounding grid

Abstract

The invention provides an arrangement structure of a transformer substation grounding grid. The structure comprises a movable grounding body used for guiding a current into the ground, fixed groundingbodies used for current guiding and fixing of the movable grounding body, connection buckles used for connecting the fixed connection bodies and the movable grounding body, and grounding down conductors arranged at one end of the movable grounding body, wherein the grounding down conductors are connected with the electrical device of a transformer substation for current guiding of the electricaldevice. In the arrangement structure of the transformer substation grounding grid, the fixed grounding bodies are enlarged from inside to outside until the area of the grounding grid is the same as the area of the transformer substation, corners of a fixed grounding body are in fit contact with the sides of the larger fixed grounding body so as to increase the effective sectional area of the grounding body, correspondingly reduce the contact resistance and improve the diversion efficiency.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to an arrangement structure of a substation grounding grid. Background technique [0002] In recent years, most of the accidents caused by lightning strikes in many substations in China are related to the unqualified grounding resistance of the grounding grid. The grounding grid plays the role of working grounding and protective grounding. The required level causes damage to the equipment. At present, the grounding device of the transmission line tower includes a grounding body and a grounding downconductor. The grounding body is also called a grounding electrode, which refers to a metal conductor buried in the ground and directly in contact with the soil. earth leakage current. The grounding down conductor is a wire used to connect the lightning conductor and the grounding body. Its function is to conduct the lightning current on the lightning conductor and flow into the g...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a substation grounding grid layout structure to solve the problems in the above-mentioned prior art that the grounding grid resistance is too large, cannot meet the lightning protection requirements, and the construction process is cumbersome, time-consuming and labor-intensive.

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