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Research on the Influence Law of Soil Layered Structure on HVDC Interference Suffered by Buried Pipeline
ID：621 View Protection：ATTENDEE Updated Time：2022-09-12 19:57:45 Hits：496 Poster Presentation

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Abstract
With the large-scale construction of HVDC transmission systems, the problems caused by HVDC interference have become increasingly prominent. Existing cases have shown that the changes in soil resistivity and layered structure in different regions will have great impact on the current quantity discharging from the grounding electrode and interference amplitude during the unipolar situation of HVDC transmission system. In this paper, a calculation model of high-voltage direct current interference electric field is built based on the parameter information of pipelines and grounding electrodes in actual projects. The influence of soil resistivity, layered soil structure, and local soil structure changes on the interference parameters of buried pipeline interfered by HVDC was investigated and obtained. The results show that the layered structure with low resistivity on upper layer /high resistivity on lower layer will generate higher interference on the pipeline compared to the uniform or high resistivity on upper layer /low resistivity on lower layer . At the same time, the change of local resistivity will only affect the change of local interference potential and current density.
 
Keywords
Soil layered structure，HVDC interference，Buried pipeline，Law research
Speaker
Shangmao Hu
electric power research institute,CSG, China, People's Republic of

Submission Author
Shangmao Hu electric power research institute,CSG, China, People's Republic of
Qingsong Liu Maintenance and Test Center of EHV Power Transmission Company, China southern Power Grid, Guangdong Guangzhou China 510663
shaojie Gu electric power research institute,CSG, China, People's Republic of
Gang Liu Maintenance and Test Center of EHV Power Transmission Company, China southern Power Grid, Guangdong Guangzhou China 510663
Wei Chen Maintenance and Test Center of EHV Power Transmission Company, China southern Power Grid, Guangdong Guangzhou China 510663
Hansheng Cai Maintenance and Test Center of EHV Power Transmission Company, China southern Power Grid, Guangdong Guangzhou China 510663
Jun Deng Maintenance and Test Center of EHV Power Transmission Company, China southern Power Grid, Guangdong Guangzhou China 510663
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    Sep 25

    2022

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    Sep 29

    2022

  • Aug 15 2022

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  • Sep 10 2022

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  • Nov 10 2022

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  • Nov 30 2022

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  • Nov 30 2022

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