Four-plus-one surge absorbing type grounding device

Abstract

The invention provides a four-plus-one surge absorbing type grounding device comprising a current guiding grid and a ground potential limiter connected with the current guiding grid. The current guiding grid is formed by shunt electrodes, current-guiding anti-corrosion concrete belts and horizontal grounding bodies. Various current releasing channels for absorbing, consuming, and releasing are formed under the ground, so that resistive components and inductive components of the grounding system can be reduced simultaneously and total surge-to-ground releasing is realizing by means of absorbing one part, consuming one part, and discharging one part. The provided grounding device has advantages of low ground potential, simple design, convenient installation, accurate detection, reliable work and low manufacturing cost.

Description

technical field [0001] The invention relates to the technical field of lightning protection and grounding, in particular to a 4+1 surge absorbing grounding device. Background technique [0002] At present, the difficult problems of grounding technology: [0003] 1. The calculation of grounding resistance, the installation of grounding device and the measurement of grounding resistance are based on the simulation technology method under uniform soil and power frequency current or DC conditions. In reality, the inhomogeneity of soil and the uncertainty of surge current are difficult to meet the existing requirements. Conditions, reducing the grounding impedance, especially reducing the inductive component, there is no specific method in the prior art. [0004] 2. Grounding impedance X Z is the resistive component (earth resistance) X R and perceptual component X L The vector sum of (such as figure 1 shown), the existing grounding technology only solves the resistive compo...

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Problems solved by technology

[0003] 1. The calculation of grounding resistance, the installation of grounding device and the measurement of grounding resistance are based on the simulation technology method under uniform soil and power frequency current or DC conditions. In reality, the inhomogeneity of soil and the uncertainty of surge current are difficult to meet the existing requirements. conditions, reducing the grounding impedance, especially reducing the inductive component, there is no specific method in the prior art

[0004] 2. Grounding impedance X Z is the resistive component (earth resistance) X R and perceptual component X L The vector sum of (such as figure 1 shown), the existing grounding technology only solves the resistive component X R The problem

[0006] 4. At present, more than 90% of the faults of power facilities come from shock waves, which are related to the grounding inductive component X L Closely related, there are no relevant technical standards in the current standards and specifications at home and abroad

[0007] 5. The characteristics of the traditional grounding device under the action of the impact current are very different from those under the action of the power frequency current. Due to the influence of the inductive component, it shows obvious nonlinear time-varying characteristics

According to the electromagnetic field theory, due to the inductive component factor, the existing grounding device has limited discharge ability to the lightning wave head

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