JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2017, Vol. 47 ›› Issue (4): 103-109.doi: 10.6040/j.issn.1672-3961.0.2017.100

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Difference calculation of grounding grid performance under different soil layered structures

TAO Yaguang1, LI Tianjiao2, TIAN Ye3, WANG Zhaojun3, CHENG Famin3, LI Qingquan1*   

  1. 1. Shandong Provincial Key Laboratory of UHV Transmission Technology and Equipment, Jinan 250061, Shandong, China;
    2. College of Mechanical and Electrical Engineering, Northeast Forestry University, Harbin 150040, Heilongjiang, China;
    3. Dongying Power Supply Company of State Grid Shandong Electric Power Company, Dongying 257000, Shandong, China
  • Received:2017-03-14 Online:2017-08-20 Published:2017-03-14

Abstract: In order to quantify the difference in safety performance of the substation grounding network under different soil structures as much as possible, based on the measured soil resistivity data, the substation ground network safety indicators, such as step voltage and touch voltage of the mountains, coastal and hilly areas under the vertical layered soil structure and the level layered soil structure were analysed, and the differences between regions in percentage were evaluated. The results showed that the soil vertical layered structure and horizontal layered structure could be accurately calculated by using current distribution, electromagnetic field and soil analysis(CDEGS)software,the necessity of considering vertical layered soil was explained by the contrast of step voltage and touch voltage under two kinds of soil structure in different regions,deviation percentage of touch voltage and step voltage near the soil interface part under vertical stratification structure were higher at the same area, and the calculation results of maximum deviation percentage showed that the difference caused by different soil layers structure was more obvious in the bigger resistivity region

Key words: ground network, soil stratification, vertical stratification, CDEGS, deviation percentage, soil interface

CLC Number: 

  • TM632
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