地磁暴侵害油气管道的管地电位效应

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Abstract Oil and gas pipelines are buried under ground with insulating coats on both the inner and outer surfaces of the steel pipeline to prevent direct contact from the soil.Therefore,its interfering and responding mechanism under the geomagnetic storm is different from that in the power grid,and it is of great importance that we study such interfering mechanism,physical process and the interference effect for analyzing the influence and damage of pipelines under geomagnetic storm.Based on 9 events of weak to medium geomagnetic storms induced pipe-soil potential (PSP) phenomenon spotted in line No.1 of West-East natural gas transmission and Shan-Jing line No.2 in the period of 2012 to 2014,we analyzed the mechanism and process of geomagnetically induced current (GIC) in pipelines.We also revealed the mechanism of the PSP as a derivative of GIC.With the PSP calculation method proposed by David H.Boteler and under the assumption of an induced electric field of 0.1 V/km along the same direction as the pipelines,we calculated PSP levels in different forms of pipelines.The calculation results and monitored data suggest that,even in cases of weak and medium geomagnetic storms,it is possible for PSP to exceed the limit set by straycurrent interference protection.This shows that weak and medium geomagnetic storms need to be taken into consideration in future researches on interference and protection of pipelines.

Key words： Geomagnetic storm oil-gas pipelines pipe-soil-potential(PSP) geomagnetically induced current(GIC)

Received: 12 April 2015 Published: 07 July 2016

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TM711

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	Liu Lianguang
	Zhang Pengfei
	Wang Kairang
	Bi Wuxi
	Ge Aitian

Cite this article:

Liu Lianguang,Zhang Pengfei,Wang Kairang等. PSP Interference Effect of Geomagnetic Storm on Buried Pipelines[J]. Transactions of China Electrotechnical Society, 2016, 31(9): 68-74.

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https://dgjsxb.ces-transaction.com/EN/ OR https://dgjsxb.ces-transaction.com/EN/Y2016/V31/I9/68

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