Mitigation of induced voltages and AC corrosion effects on buried gas pipeline near to OHTL under normal and fault conditions

Abdel-Gawad, Nagat M. K.; Dein, Adel Z. El; Magdy, Mohamed

doi:10.1016/j.epsr.2015.06.007

Cited by 30 publications

(13 citation statements)

References 8 publications

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“…The second category consists of physical properties of the actual situation, which are not counted in the simplified model [29]- [32]. The most important of these are wires, pipes, towers, and non-homogeneous earth resistivity [33]- [38]. Some of these situations can be modeled in the above-mentioned magnetic field equations; others are more difficult to be represented.…”

Section: A Electric Field Calculationmentioning

confidence: 99%

Mitigation of the Electric and Magnetic Fields of 500-kV Overhead Transmission Lines

et al. 2022

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The electric and magnetic fields of overhead high voltage transmission lines are still a critical problem for new construction because of their biological effects on the human body. This issue has been a subject of scientific interest and public concern for the risk of the electric and magnetic fields on living organisms. Accordingly, the overhead transmission lines are considered a source of such this risk due to their high electric and magnetic fields in the populated areas. Because of the recent concerns that electric besides magnetic fields, generated by overhead transmission lines, electric power researchers have been trying to find effective methods for the mitigation of the electrical and magnetic fields to be in the range of acceptable limits. Researchers have been trying to find transmission line geometries that will reduce these electric and magnetic fields. Therefore, in this article two novel methods of reducing the electric and magnetic fields are discussed, one is to change the position of the center phase to optimize the delta configuration and the other is to use more than two shielding wires with calculating the currents in these wires. The obtained results of the two proposed methods are compared with the electric as well as magnetic fields, and the right-of-way values of the present conventional configuration. Additionally, this article presents a case study carried out on an Egyptian 500 kV high voltage overhead transmission line for the mitigation of magnetic and electric field intensities.INDEX TERMS Mitigation of the electrical and magnetic fields, numerical methods, biological effects of electromagnetic, overhead power transmission lines.

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Section: A Electric Field Calculationmentioning

confidence: 99%

Mitigation of the Electric and Magnetic Fields of 500-kV Overhead Transmission Lines

et al. 2022

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“…Based on the steady model of LVDC supply and utilization system in the normal condition, the model of LVDC supply and utilization system under various fault conditions can be derived, which consist of single-line-to-ground fault, double-line-to-ground fault, three-line-to-ground fault, positive pole-to-ground fault, negative pole-to-ground fault [27]. The extra current loop will be added to the LVDC supply and utilization system under the fault condition, which leads to the change in matrices and adds an additional parameter into them.…”

Section: T S S S S S S = Smentioning

confidence: 99%

Grounding Fault Model of Low Voltage Direct Current Supply and Utilization System for Analyzing the System Grounding Fault Characteristics

Liu¹,

Sun²,

Ma³

et al. 2021

Symmetry

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Grounding fault analysis is of vital importance for low voltage direct current (LVDC) supply and utilization systems. However, the existing DC grounding fault model is inappropriate for LVDC supply and utilization system. In order to provide an appropriate assessment model for the DC grounding fault impact on the LVDC supply and utilization system, an LVDC supply and utilization system grounding fault model is proposed in this paper. Firstly, the model is derived by utilizing capacitor current and voltage as the system state variable, which considers the impact of the converter switch state on the topology of the fault circuit. The variation of system state parameters under various fault conditions can be easily obtained by inputting system state data in normal conditions as the initial value. Then, a model solution algorithm for the proposed model is utilized to calculated the maximum fault current, the system maximum fault current with different grounding resistance is simple to acquired based on the solution algorithm. The calculation results demonstrate that grounding resistance and structure of LVDC supply and utilization system have remarkable impacts on the transient current. The effectiveness of the proposed model is verified in PSCAD/EMTDC. The simulation results indicate that the proposed method is appropriate for the system fault analysis under various fault conditions with different grounding resistance and the proposed model can offer theoretical guidance for system fault protection.

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“…There are important issues to consider by both electrical utilities and pipeline operators when an underground pipeline is located proximal to the ground level in overhead highvoltage power lines [1][2][3][4][5][6], namely safety and corrosion. Due to the corrosion of gas and oil pipelines caused by induced voltages from AC power lines [2][3][4][5], a pipeline AC mitigation system is needed to avoid costly repairs and maintenance. The primary focus of mitigation is to reduce the induced voltages at normal and fault conditions according to the NACE standard [6] for the safety of maintenance operators and damage in pipeline facilities.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Induced Voltage on Pipeline Located Close to Parallel Distribution System

et al. 2021

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Gas and oil pipelines are widely used to supply customers. They are often laid in parallel with high voltage power lines, sharing right of way. When the pipeline is located near overhead high-voltage power, corrosion caused by induced voltages from AC power lines can occur in utility pipelines. Therefore, the calculation of induced voltage is always required for both interference and maintenance workers as well as pipeline facility safety. For parallel distribution lines, the calculation method for the induced voltage is not suitable due to the excessive error caused by using the screening factors of the neutral current. For a more practical analysis of the induced voltage, a new analysis is needed using the actual neutral current and which also considers the overhead ground conductor and the neutral conductor. This paper analyzed the induced voltage from a parallel distribution system using Carson’s formula and vector analysis. Simulation analysis results are verified by separate Electromagnetic Transient Program (EMTP) simulation.

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Mitigation of induced voltages and AC corrosion effects on buried gas pipeline near to OHTL under normal and fault conditions

Cited by 30 publications

References 8 publications

Mitigation of the Electric and Magnetic Fields of 500-kV Overhead Transmission Lines

Mitigation of the Electric and Magnetic Fields of 500-kV Overhead Transmission Lines

Grounding Fault Model of Low Voltage Direct Current Supply and Utilization System for Analyzing the System Grounding Fault Characteristics

Analysis of Induced Voltage on Pipeline Located Close to Parallel Distribution System

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