Moreover, the experiment proves that grounding current is a decisive factor in the interference from a transmission line to GFO.
📌 3 Key Takeaways
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Objective & Hypothesis:The existence of ultrahigh voltage direct-current (UHVDC) transmission lines impacts geoelectric field observation (GFO), which further disturbs earthquake observation and prediction.
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Key Findings & Data: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.
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Conclusion & Impact:Moreover, the experiment proves that grounding current is a decisive factor in the interference from a transmission line to GFO.
🔬Design:Modeling & Simulation
📍Scope:Comprehensive Sample
⚙️Variables:Ultrahigh voltage direct-current transmission line · geoelectric field observation interference · grounding current
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.
TANG, B., WU, Z., LIU, R., WANG, S., LIN, Q. (2016). Interference in geoelectric field observation from the current of a direct-current grounding electrode. Turkish Journal of Electrical Engineering and Computer Science, Cilt: 24 - Sayı: 6, 5078–5089. https://ajindex.com/articles/187490