Interference on Geoelectrical Resistivity Observation from DC Power Transmission Line

Abstract:

The interference on the geo-electrical resistivity observation from DC power lines is a key issue puzzling seismic monitoring. According to the working principle of geoelectrical resistivity observation instrument,the reason of interference on geoelectrical resistivity observation is analyzed.The calculation formulas of potential in soil, which is represented as horizontal two-layer electrical model, are derived by equivalent complex image method which responding to the ground electrodes of DC power line with various models: one vertical ground electrode, horizontal double-ring ground electrode and four vertical ground electrodes.In this way, the values of interference on geoelectrical resistivity observation from DC power lines under various situations are calculated and researched.The results show that the value of interference could be reduced 50% for horizontal double-ring ground electrode, and four vertical ground electrodes could be reduced 75%.

• Periodical: Applied Mechanics and Materials (Volumes 672-674)
• Pages: 1137-1142
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.672-674.1137
• Online since: October 2014
• Authors: Xiao Xue Wang*, Ping Dong Wang, Lang Shi, Jian Lin Rao
• Keywords: DC Power Lines, Electrical Model of Soil, Equivalent Complex Image Method, Geoelectrical Resistivity, Observation Interference, Shapes of Ground Electrode

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DOI: 10.1109/tpwrd.2003.809741