A device and method for reducing impact ground impedance value

Abstract

The invention discloses a device for reducing an impulse grounding impedance value. The device fro reducing the impulse grounding impedance value comprises a drainage conductor arranged on a tower horizontal grounding electrode. A plurality of shunt conductors are arranged on the periphery of the drainage conductor and are evenly distributed in sequence along the extending direction of an axis of the drainage conductor. During an operation process, the plurality of shunt conductors are welded on the drainage conductor, and therefore an 'end effect' of the grounding electrode is restrained, broken stream is enabled to be more even, middle broken stream capacity of the drainage conductor is fully used, a grounding conductor is used more fully, a whole assembling structure is simple and reliable, the operation process is convenient and easy to carry out, the impulse grounding impedance value can be greatly reduced, a lightning withstand level of a electric transmission and distribution circuit is obviously improved, trip phenomena caused by lightning stroke is reduced, and safe and stable operation of an electric system is endured. The invention further discloses a method which uses the device and used for reducing the impulse grounding impedance value.

Description

technical field [0001] The invention relates to the technical field of auxiliary equipment for power transmission and transformation equipment, in particular to a device for reducing the impact grounding impedance value. The invention also relates to a method for reducing the impact grounding resistance value using the device. Background technique [0002] In the current power system operation and maintenance process, most power transmission and transformation line accidents are caused by tripping caused by lightning strikes on transmission lines or towers. Improving the lightning resistance level of power transmission and transformation lines and reducing the lightning trip rate are of great significance to the safe operation of power systems. In the design of line towers, the value of the impact grounding impedance of the grounding device directly affects the lightning protection effect of the line. Therefore, it is of great significance to optimize the structural design...

AI Technical Summary

Problems solved by technology

[0003] At present, in the existing lightning protection ground pole equipment, it usually adopts a composite structure composed of multilayer materials such as carbon fiber tensile reinforcement and carbon fiber graphite outside the reinforcement. Although this structure can meet the basic lightning protection requirements, due to its The mechanism itself is complex, and the manufacturing process and post-maintenance are relatively cumbersome, which causes a lot of inconvenience to the normal operation and post-maintenance of power system equipment

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