Analysis of the effect of explosion grounding electrode on grounding resistance reduction

The purpose of arranging the grounding electrode is to discharge large currents, such as fault current and ensure the transmission line operate safely. In the grounding system of Chinese transmission network, the common grounding electrodes are horizontal installation and vertical installation. But two installation methods usually have the disadvantages, which are long distance installation and large depth burying, and they are restricted susceptible to uncertain factors such as pipelines, roads and geology, which leads the grounding resistance increasing and affect the normal operation of transmission lines. In order to solve the problem, this paper presents a new grounding model for complex soil environments and analysis from grounding resistance, surface potential and current distribution. The results show that the helix grounding electrode has good resistance reduction performance in complex soil environment, which effectively improves the surface potential distribution and the distribution of the spill current.

Download Full-text

Simulation of impact of vertical grounding electrode on impulse grounding resistance of substation grounding network

2017 2nd IEEE International Conference on Integrated Circuits and Microsystems (ICICM) ◽

10.1109/icam.2017.8242130 ◽

2017 ◽

Cited By ~ 3

Author(s):

Lijun Zhou ◽

Jian He ◽

Han Xu ◽

Pengcheng Wang ◽

Ying Chen ◽

...

Keyword(s):

Grounding Resistance ◽

Grounding Electrode

Download Full-text

Application research on grounding resistance reduction in substation in high soil resistivity area and with limited grounding area

2006 China International Conference on Electricity Distribution (CICED 2006) ◽

10.1049/cp:20061843 ◽

2006 ◽

Author(s):

Dongsheng Wang

Keyword(s):

Application Research ◽

Soil Resistivity ◽

Grounding Resistance ◽

High Soil ◽

Resistance Reduction

Download Full-text

An Experimental Study on the Electrical Properties of Fly Ash in the Grounding System

International Journal of Emerging Electric Power Systems ◽

10.2202/1553-779x.1284 ◽

2006 ◽

Vol 7 (2) ◽

Cited By ~ 2

Author(s):

Shin-Der Chen ◽

Li-Hsiung Chen ◽

Chih-Kun Cheng ◽

Jiann-Fuh Chen

Keyword(s):

Fly Ash ◽

Power Systems ◽

Power Plants ◽

Bottom Ash ◽

Waste Utilization ◽

Mineral Admixture ◽

Attractive Alternative ◽

Grounding System ◽

Grounding Resistance ◽

Resistance Reduction

A good grounding system is the fundamental insurance to keep the safe operation of power systems. The grounding resistance reduction additive-fly ash is proposed in this study. Fly ash is the byproduct of coal-fired power plants. A pulverized coal boiler generates approximately 80% fly ash and only 20% bottom ash. Furthermore, the study of these materials will assume greater importance. Waste utilization is an attractive alternative to disposal in that disposal cost and potential pollution problems are reduced. Extensively used as an additive in Portland cement or as a mineral admixture in concrete in recent years, we have found that fly ash has a low resistivity, and so can be used as an agent for reducing resistance to grounding. Also, an effort is made to investigate the effect of water-to-cement(W/C) and temperature on the resistivity of the test specimens. The grounding resistance reduction agent was determined by considering various proportions of water, cement and salt. Experimental results demonstrate that the proposed approach can effectively reduce the grounding resistance.

Download Full-text

The Effect of Grounding Electrode Parameters on Soil Ionization and Transient Grounding Resistance Using Electromagnetic Field Approach

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.554.628 ◽

2014 ◽

Vol 554 ◽

pp. 628-632 ◽

Cited By ~ 4

Author(s):

Mehrdad Mokhatri ◽

Zulkurnain Abdul-Malek

Keyword(s):

Electromagnetic Field ◽

Electric Field ◽

Field Intensity ◽

Electric Field Intensity ◽

Electrode System ◽

Grounding Resistance ◽

Field Approach ◽

Electrode Resistance ◽

Grounding Electrode ◽

Soil Ionization

The soil ionization phenomenon occurs during the dispersion of lightning current into the earth. This phenomenon causes the grounding electrode resistance to be effectively reduced. The extension of the soil ionization depends on the current amplitude along the electrode and the resultant electric field intensity surrounding the electrode. The electrical and physical parameters of the grounding electrode system are found as factors that affect the electric field intensity. In this study the electromagnetic field approach and the soil breakdown theory are taken into account to investigate the effect of the mentioned factors on soil ionization and grounding resistance. Changing the parameters of the grounding electrode system affect the electric field distribution around the electrode. Based on the conditions the grounding electrode resistance was reduced between 12% to 75% by considering the soil ionization effect.

Download Full-text