This work proposes a numerical methodology for the calculation of currents and voltages induced on underground pipelines by nearby overhead power lines. A previously developed quasi-3D methodology is extended, allowing the investigation of nonparallel routings of the pipelines with respect to the power lines. The proposed technique is based on a discretization of the pipeline path into several segments parallel to the power line. The section of the corridor corresponding to each pipeline segment is regarded as an electrical multi-port component, whose electrical parameters are extracted via finite element 2D analysis. Then, the obtained components are integrated into a network embodying the physical characteristics of the whole corridor. In this way, the circuital analysis is used to extend the capabilities of a standard two-dimensional field analysis. The proposed methodology is employed to simulate a pipeline running parallel to a power line for a distance of 12km. Afterwards, several nonparallel configurations – consisting of crossings between a pipeline and a power line – are assessed. The physical consequences of the crossing are discussed and a convergence study is performed to investigate the optimal pipeline subdivision procedure to be adopted for a set of different crossing angles.

A numerical model for the calculation of electromagnetic interference from power lines on nonparallel underground pipelines / Popoli A.; Cristofolini A.; Sandrolini L.. - In: MATHEMATICS AND COMPUTERS IN SIMULATION. - ISSN 0378-4754. - ELETTRONICO. - 183:(2021), pp. 221-233. [10.1016/j.matcom.2020.02.015]

### A numerical model for the calculation of electromagnetic interference from power lines on nonparallel underground pipelines

#### Abstract

This work proposes a numerical methodology for the calculation of currents and voltages induced on underground pipelines by nearby overhead power lines. A previously developed quasi-3D methodology is extended, allowing the investigation of nonparallel routings of the pipelines with respect to the power lines. The proposed technique is based on a discretization of the pipeline path into several segments parallel to the power line. The section of the corridor corresponding to each pipeline segment is regarded as an electrical multi-port component, whose electrical parameters are extracted via finite element 2D analysis. Then, the obtained components are integrated into a network embodying the physical characteristics of the whole corridor. In this way, the circuital analysis is used to extend the capabilities of a standard two-dimensional field analysis. The proposed methodology is employed to simulate a pipeline running parallel to a power line for a distance of 12km. Afterwards, several nonparallel configurations – consisting of crossings between a pipeline and a power line – are assessed. The physical consequences of the crossing are discussed and a convergence study is performed to investigate the optimal pipeline subdivision procedure to be adopted for a set of different crossing angles.
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2021
A numerical model for the calculation of electromagnetic interference from power lines on nonparallel underground pipelines / Popoli A.; Cristofolini A.; Sandrolini L.. - In: MATHEMATICS AND COMPUTERS IN SIMULATION. - ISSN 0378-4754. - ELETTRONICO. - 183:(2021), pp. 221-233. [10.1016/j.matcom.2020.02.015]
Popoli A.; Cristofolini A.; Sandrolini L.
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Utilizza questo identificativo per citare o creare un link a questo documento: `https://hdl.handle.net/11585/763534`
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