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Grounding Resistance Measurement Method Based on the Fall of Potential Curve Test Near Current Electrode
- Source :
- IEEE Transactions on Power Delivery. 32:2005-2012
- Publication Year :
- 2017
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2017.
-
Abstract
- Grounding resistance is an important basic index used to ensure the safety and reliability of grounding systems. In this paper, a method for grounding resistance measurement based on the fall of potential curve is proposed that can be performed using a 2–2.5D lead wire length. In this method, the potential distribution near the auxiliary current electrode is tested and is used as the main analysis and measurement parameter. Based on the relationship between the potential distribution generated by the grounding grid and the current electrode, the grounding resistance of the grounding grid can be deduced. First, the voltages between the grounding grid and the earth surface potential near the current electrode are measured; then, the ground potential rise (GPR) of the grounding grid is calculated through theoretical analysis and numerical calculation; and finally, the grounding resistance is calculated by dividing the potential by the test current. This method avoids the complex task of accurate compensation point location required for traditional measurement methods, and can be performed easily and quickly using a short lead wire. Measurement results from spot testing show that the proposed method can meet the accuracy requirements of engineering testing.
- Subjects :
- Engineering
business.industry
Ground
020209 energy
020208 electrical & electronic engineering
Electrical engineering
Energy Engineering and Power Technology
Mechanical engineering
02 engineering and technology
Compensation (engineering)
Reliability (semiconductor)
Ground-penetrating radar
0202 electrical engineering, electronic engineering, information engineering
Point location
Electric potential
Electrical and Electronic Engineering
Current (fluid)
business
Voltage
Subjects
Details
- ISSN :
- 19374208 and 08858977
- Volume :
- 32
- Database :
- OpenAIRE
- Journal :
- IEEE Transactions on Power Delivery
- Accession number :
- edsair.doi...........df19123fb7c7b90c5527641f8f06475b