架空电力线路故障状况下对埋地金属管道感性耦合的传输线计算模型

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Abstract Resistive coupling and inductive coupling effects are produced on adjacent underground metal pipeline when overhead power lines suffer from grounding fault. In this paper,based on the multi-conductor transmission line model of overhead power transmission lines and underground metal pipeline,the tower ground impedances could be modeled by lumped parameter and distribution parameters,and combining with the constraint conditions of voltages and currents at the transmission line ends and the fault point,the formulas of voltages and currents distribution along the transmission are derived. Then based on the method of moment,the resistive coupling voltage on the oil/gas pipeline parallel to the transmission line because of the currents along the towers is investigated. The methods are verified to be correct and effective by compared with the results of CDEGS. At last,research on the influence on the coating stress voltage of some factors such as parallel length,separation distance and soil resistivity are given by the method mentioned in the paper,and the proposed method can be used for the pipeline safety evaluation and the determination of minimum distance between the pipeline and the power transmission line.

Key words： Overhead power transmission line underground metal pipeline grounding fault transmission line model inductive coupling method of moment

Received: 21 February 2012 Published: 11 December 2013

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TM83

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	Qi Lei
	Yuan Hui
	Li Lin
	Cui Xiang

Cite this article:

Qi Lei,Yuan Hui,Li Lin等. Transmission Line Modelling of Inductive Coupling of Overhead Power Lines Subjected to Grounding Fault to Underground Metal Pipeline[J]. Transactions of China Electrotechnical Society, 2013, 28(7): 264-270.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2013/V28/I7/264

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