Mutual impedance between an overhead and a buried line with earth return

Lucca, Giovanni

doi:10.1049/cp:19940679

Cited by 16 publications

(8 citation statements)

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“…Several mutual impedance approximations are reported in the literature. Among the notable approximations include the Carson-Clem approximation, Pollaczek integral [27] and its analytical approximation [28], Lucca and Ametani mutual impedance approximations [27][28][29][30][31]. Among these approximations, the Carson-Clem approximation is widely adopted.…”

Section: Ac Interference From Hvtls On Metallic Pipelinesmentioning

confidence: 99%

Ac Induced Corrosion Assessment of Buried Pipelines Near Hvtls: A Case Study of South Africa

Adedeji¹,

Ponnle²,

Abe³

et al. 2018

PIER B

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Metallic pipelines have attendant problems of alternating current (AC) assisted corrosion when installed in the utility corridor with high voltage transmission lines. Research studies in the past and recent years have shown that this corrosion is a primary function of the AC density through the pipe coating defect. While several other AC corrosion risk assessment indices have been proposed, the AC density is regarded as a valuable parameter in assessing pipeline corrosion risk due to AC interference. Also, there exists a threshold value which, if exceeded, guarantees the possibility of pipeline corrosion damage. However, for buried pipelines, monitoring these AC corrosion assessment indices is a major challenge. Therefore, to avoid severe corrosion damage to such pipelines, a corrosion assessment for evaluating the corrosion risk of the pipelines due to AC interference is presented in this paper. The assessment was demonstrated on a buried pipeline in one of the Rand Water sites, South Africa where AC interference is frequent. The overall simulation results yield useful information which may be essential for pipeline operators, most especially Rand Water, South Africa and corrosion engineers for AC corrosion assessment of metallic pipelines installed near transmission lines. The analysis presented in this paper may also be used for the evaluation of a safe position for installing new pipelines near existing power lines right-of-way.

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Section: Ac Interference From Hvtls On Metallic Pipelinesmentioning

confidence: 99%

Ac Induced Corrosion Assessment of Buried Pipelines Near Hvtls: A Case Study of South Africa

Adedeji¹,

Ponnle²,

Abe³

et al. 2018

PIER B

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show abstract

“…2). There exist, in the literature, many simplified expressions of (8) (see, for example, the ones presented in [1]) that are often used to evaluate the pul mutual impedance; among them we choose to adopt the following one [22]…”

Section: Inducing Line Of Infinite Lengthmentioning

confidence: 99%

Different approaches in calculating AC inductive interference from power lines on pipelines

Lucca¹

2018

IET Science, Measurement & Technology

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“…The calculation of the projection of the primary field E ′ along the direction of the victim circuit is straightforward by means of the formula

E^{normal′} ()(, x, y) = - z_{ind, vic} ()(, x, y) {bold-italicu}_{normalind} \cdot {bold-italicu}_{normalvic} \cdot I

Being z ind,vic ( x , y ) the p.u.l. mutual impedance between the inducing line and a parallel induced line passing through the point ( x , y ); formulas for calculating the mutual impedance between two lines with earth return can be found in [1, 14] (see Appendix).…”

Section: Model For Calculating the Urban Shielding Factormentioning

confidence: 99%

Electromagnetic interference at power frequencies: shielding factor related to an urban environment

Lucca¹

2016

IET Science, Measurement & Technology

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Mutual impedance between an overhead and a buried line with earth return

Cited by 16 publications

References 0 publications

Ac Induced Corrosion Assessment of Buried Pipelines Near Hvtls: A Case Study of South Africa

Ac Induced Corrosion Assessment of Buried Pipelines Near Hvtls: A Case Study of South Africa

Different approaches in calculating AC inductive interference from power lines on pipelines

Electromagnetic interference at power frequencies: shielding factor related to an urban environment

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