Induced electromagnetic field on underground metal pipelines running parallel to nearby high voltage AC power lines

Dushimimana, Giovanni; Simiyu, Patrobers; Ndayishimiye, Vedaste; Niringiyimana, Emile; Bikorimana, Sefu

doi:10.1051/e3sconf/201910702004

Cited by 6 publications

(2 citation statements)

References 14 publications

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“…It was found that when the pipeline crosses the line from a small angle to a large angle, the interference suffered by the pipeline can be reduced. Dushimimana et al [ 21 ] investigated the influence of high‐voltage AC transmission lines on AC interference voltage and induced electromagnetic field of adjacent pipelines under the steady operation and fault conditions of AC transmission lines with different influence parameters such as parallel length, parallel interval, and load currents. It was found that the induced voltage increases with the increase of load current, and it is inversely proportional to the cross angle, the smaller the angle the higher the induced voltage.…”

Section: Introductionmentioning

confidence: 99%

Study on AC interference law of high voltage AC cable to submarine pipeline and safe distance

Zhu

Long

Chen

et al. 2022

Materials & Corrosion

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In recent years, due to the large-scale construction of wind power and shore power projects, the amount of submarine high-voltage AC cables has been increasing year by year, and they often form a "common corridor" in parallel with adjacent submarine pipelines, resulting in AC interference on pipelines. A lot of research has been carried out on the AC interference law of buried pipelines onshore. However, there is a lack of discussion on the AC interference suffered by submarine pipelines from high-voltage AC cables.How to understand the AC interference law of high-voltage AC cables to submarine pipelines and determining the safe distance has become an urgent demand in practical production. Based on this, this paper established a calculation model for AC interference suffered by submarine pipelines from high-voltage AC cables on through CDGES software. Through simulation calculation, the influence laws of many factors such as parallel distance between AC cables and pipelines, parallel length, cable load current, anticorrosive coating resistivity, and longitudinal pipeline resistance per unit length on AC interference parameters of pipelines were investigated. It was found that the degree of AC interference increases with the increase of the anticorrosive coating resistivity, the load current, and the longitudinal pipeline resistance per unit length, as well as the decrease of the parallel interval.However, with the increase of the parallel length, the AC interference voltage and current density of the pipeline increase firstly, then decrease, and at the end remains unchanged, and it was found that there existed the parallel length with the maximum AC interference and the saturation parallel length with unchanged AC interference. Based on the principles of electromagnetic induction and AC circuits, the main reasons for the parallel length with maximum AC interference and the saturation parallel length were analyzed in this paper. The safe distances avoiding AC corrosion under different parallel lengths and load currents were discussed, which can provide a reference for the evaluation of AC interference of submarine pipelines and the selection of submarine routing.

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Section: Introductionmentioning

confidence: 99%

Study on AC interference law of high voltage AC cable to submarine pipeline and safe distance

Zhu

Long

Chen

et al. 2022

Materials & Corrosion

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“…Because of the high cost of right-of-ways, it is in fact unavoidable that the pipelines share the same corridor with high-voltage AC (HVAC) power lines [4][5][6]. It is then likely that electromagnetic interference may occur, where the source is constituted by the HVAC power line and the victim by the metallic buried pipeline [7][8][9]. In general, this electromagnetic interference consists of inductive, capacitive and conductive contributions [10] which can be studied and assessed with three different coupling mechanisms.…”

Section: Introductionmentioning

confidence: 99%

Reduction in the Electromagnetic Interference Generated by AC Overhead Power Lines on Buried Metallic Pipelines with Screening Conductors

2021

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This paper presents a numerical study on the reduction in the voltage and current induced on a 13.5 km buried metallic pipeline by an overhead power line. The mitigation effectiveness of different configurations and cross-section shapes of screening conductors is computed by means of a methodology that combines a 2D Finite Element Analysis with circuital analysis. A 35.72% reduction of the maximum induced voltage is obtained when 4 cylindrical steel screening conductors with 8 mm radius are buried 0.25m below the soil surface, along the pipeline path. The maximum induced pipeline current is reduced by 26.98%. A parametric study is also performed, to assess the influence of the per-unit-length admittance to earth of the screening conductors on the mitigation efficacy. The results show that screening conductors may help in reducing the inductive coupling between overhead power lines and buried metallic pipelines, and that the assumption of perfectly insulated screening conductors leads to an underestimation of the produced mitigation effect.

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Modeling, analysis, and shielding of the electric field between extra-high-voltage AC transmission lines and oil pipelines

Abdelsattar,

Ziedan,

Elnozahy

2023

Electr Eng

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The static charges and induced voltages from extra-high-voltage alternating current transmission lines (EHVACTLs) on parallel oil pipelines (POPLs) raise the risk levels for people and animals. Thus, the objective of this paper was to reduce and/or mitigate the electric field which is concentrated on POPLs by using grounded shield wires under EHVACTLs. Three techniques are employed to reduce the electric field effects on POPLs of two distinct types of transmission lines (TLs), 500 kV and 220 kV. The first technique involves raising the tower’s height to improve the clearance space between the POPLs and the TL conductors. The second technique is increasing the horizontal distance between the POPLs and the nearest stressed conductors of the TL. The third technique involves placing shield wires beneath the stressed conductors of the EHVACTLs. The electric field under the EHVACTLs is calculated with and without the grounded shield wires using charge simulation method. The results of the first technique revealed that with increasing the tower height from 10 m to 15, 20, 25, and 30 m, the electric field decreased by 43.75%, 62.5%, 68.75%, and 75%, respectively. Herein, employing the second technique, the electric field intensity is reduced by 20% and 21% depending on the POPL placed at a distance from the right stressed conductor equal to the horizontal clearance between conductors of 500 kV and 220 kV, respectively. Besides, the results of the third technique proved that the shield wires under the EHVACTLs reduced the electric field intensity on the POPLs by 17.65% and 24.71% for 500-kV and 220-kV TLs, respectively.

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Induced electromagnetic field on underground metal pipelines running parallel to nearby high voltage AC power lines

Cited by 6 publications

References 14 publications

Study on AC interference law of high voltage AC cable to submarine pipeline and safe distance

Study on AC interference law of high voltage AC cable to submarine pipeline and safe distance

Reduction in the Electromagnetic Interference Generated by AC Overhead Power Lines on Buried Metallic Pipelines with Screening Conductors

Modeling, analysis, and shielding of the electric field between extra-high-voltage AC transmission lines and oil pipelines

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