Interference in geoelectric field observation from the current of a direct-current grounding electrode

Authors

BO TANG
ZHUO WU
REN LIU
SHUANG WANG
QIXIANG LIN

DOI

10.3906/elk-1504-189

Abstract

The existence of ultrahigh voltage direct-current (UHVDC) transmission lines impacts geoelectric field observation (GFO), which further disturbs earthquake observation and prediction. We proposed a mathematic method based on a 3-dimensional layered soil model to calculate the interference and conducted GFO experiments at observatories and field observation sites during the live debugging of a $\pm $800 kV UHVDC transmission line to verify the method. The results obtained by using the proposed method are in good accordance with the experimental results and the maximum error is no more than 15%. Moreover, the experiment proves that grounding current is a decisive factor in the interference from a transmission line to GFO.

Keywords

Ultrahigh voltage direct-current transmission line, geoelectric field observation interference, grounding current, 3-dimensional complex layered soil model, interference experiments of geoelectric field observation

First Page

5078

Last Page

5089

Recommended Citation

TANG, BO; WU, ZHUO; LIU, REN; WANG, SHUANG; and LIN, QIXIANG (2016) "Interference in geoelectric field observation from the current of a direct-current grounding electrode," Turkish Journal of Electrical Engineering and Computer Sciences: Vol. 24: No. 6, Article 39. https://doi.org/10.3906/elk-1504-189
Available at: https://journals.tubitak.gov.tr/elektrik/vol24/iss6/39