Research of Geoelectric Field Observation Interference with Different Electrode Arrangements from UHVDC Power Lines

Abstract:

The interference from UHVDC power lines is a key issue puzzling the geo-electric field observation in seismic station. According to the working principle of geo-electric field observation instrument, the interference reason on geo-electric field observation is analyzed, which potential distribution of the electrodes in soil of geo-electric field observation instrument is changed by the ground current from ground electrode of power line. Based on the different electrode arrangements, the electric field calculation model at different positions away from ground electrode is established, and thus the variation could be acquired. The results show that interference values are affected due to the electrode spans and the electrode arrangement directions, and there has the minimum interference when the electrode span is 100 m or the angle between line of two electrodes and radial line of ground electrode is 45°.

• Periodical: Applied Mechanics and Materials (Volumes 380-384)
• Pages: 3262-3265
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.380-384.3262
• Online since: August 2013
• Authors: Bo Tang, Fei Qiao, Guang Zu Ge, Zi Hang Qu, Ying Huang, Jian Xiong Zhu
• Keywords: Electric Field, Electrode Arrangements, Geo-Electric Field Observation, Ground Current, UHVDC Power Lines

References

[1] Liu Zhenya, Ultra-High voltage grid, [M], Beijing, China Economy Press, 2006: 2-8.

[2] R.C. Corney, G.B. Burns, K. Michael. The influence of polar-cap convection on the geoelectric field at Vostok, Antarctica, [J]. Journal of Atmospheric and Solar-Terrestrial Physics, 2003, 65(3): 345-354.

DOI: 10.1016/s1364-6826(02)00225-0

[3] Qi Lei, Cui Xiang, Wu Yan. Researches on the minimum distance between AC lines and the earthquake observation station, [J]. High Voltage Technique, 2010, 36(3): 649-656.

[4] Tang Bo, Wen Yuanfang, Liu Hongzhi, etc. the influence of DC lines to geomagnetic observation, [J]. High Voltage Technique, 2011, 37(4): 952-960.

[5] Li Xiaodong, Yuan Shun, Wang Baozhu. Problems need attention in geo-electric field erection and interference exclusion, [J]. Inland Earthquake, 2008, 22(4): 349-354.

[6] Fang Wei, Zhang Guoqiang, Shao Huicheng. the influence of HVDC lines to geo-electric field observation, [J]. Seismology and Geology, 2010, 32(3): 434-441.

[7] China Seismological Bureau Monitoring and Prediction Department. Earthquake electromagnetic digital observation technology, [M]. Beijing: Seismological Press, (2002).

[8] China National Standardization Management Committee. GB/T 19531. 2-2004. Technical requirements of seismographic station observation environment in part 2: electromagnetic observation, [S]. Beijing: China Standards Press, (2004).