Mitigation of the magnetic field due to underground power cables using an optimized grid

Almeida, M.E.; Machado, V. Maló; Neves, M. Guerreiro das

doi:10.1002/etep.427

Cited by 9 publications

(6 citation statements)

References 8 publications

(20 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The technique is based on placing an additional mitigation system (conductive passive shield with an aluminium thickness of 4 mm), close to the source of the protected region [9], [19].…”

Section: Mitigation Of Magnetic Field By Shieldingmentioning

confidence: 99%

See 1 more Smart Citation

Magnetic field evaluation around 400 KV underground power cable under harmonics effects

Boudjella¹,

Ayad²,

Rouibah³

et al. 2022

Diagnostyka

View full text Add to dashboard Cite

Power lines or underground power cables generate electromagnetic interaction with other objects near to them. This study evaluates the magnetic field emitted by underground extra high voltage cables. The presented work aims to show a numerical simulation of the magnetic field of a buried 400 kV underground power line, which is used as a novel prototype in several countries at a short distance. The underground power cable study, in the presence of the current harmonics at different positions, with time variation by finite element resolution, using Comsol Multiphysics with Matlab software in two dimensions. The simulation results illustrate the magnetic flux density variation-in terms of amplitude and distribution as a function of different actual harmonics rates. The underground cable performance and magnetic field have affected by the harmonics effects. The maximum magnetic induction levels generated by significant harmonics are superior to the limits recommended by the international standard norms. In this paper, shielding has been used as an appropriate remedy to attenuate the magnetic field.

show abstract

“…The technique is based on placing an additional mitigation system (conductive passive shield with an aluminium thickness of 4 mm), close to the source of the protected region [9], [19].…”

Section: Mitigation Of Magnetic Field By Shieldingmentioning

confidence: 99%

“…Authors in [18], suggested an optimized grid composed of a set of nm conductors, parallel to the power cables, to mitigate the MF originated by UPC. Mitigation of magnetic flux density (MFD) of UPC and its conductor term temperature-based FEM is discussed in reference [19]. MF shielding of UPC by an H-shaped shield is adopted in [20].…”

Section: Introductionmentioning

confidence: 99%

Magnetic field evaluation around 400 KV underground power cable under harmonics effects

Boudjella¹,

Ayad²,

Rouibah³

et al. 2022

Diagnostyka

View full text Add to dashboard Cite

show abstract

“…A different approach is presented in [57] for an underground power system composed of several parallel subconductors, where a deterministic procedure, based on a geometrical indicator, is employed for identifying the optimal sequence arrangement with the lowest MF emissions, showing an important improvement regarding GA computational time. Alternatively, some studies substitute the use of GA in favor of other techniques, such as Sequential Quadratic Programming (SQP) [58], reducing the number of unknowns by using symmetric layouts for the power cables.…”

Section: Underground Power Linesmentioning

confidence: 99%

A Survey on Optimization Techniques Applied to Magnetic Field Mitigation in Power Systems

2019

View full text Add to dashboard Cite

With the continuous increase in the number and relevance of electric transmission lines and distribution networks, there is a higher exposure to the magnetic fields generated by them, leading to more cases of human electrosensitivity, which greatly necessitates the design and development of magnetic field mitigation procedures and, at the same time, the need to minimize both performance degradation and deterioration in the efficiency as well. During the last four decades, fruitful results have been reported about extremely low frequency magnetic field mitigation, giving a wide variety of solutions. This survey paper aims to give a comprehensive overview of cost-effective optimization techniques destined to magnetic field mitigation in power systems, with particular attention to the results reported in the last decade.

show abstract

“…Different solutions have been analyzed to mitigate the magnetic field, in particular for high voltage transmission underground cables. These solutions, which may be included in the area of electromagnetic compatibility, are frequently classified into two groups: 1) "extrinsic methods" where external apparatuses are used such as shields made of ferromagnetic or conductive materials [3]- [8], including grids of insulated conductors [9] or even other technics like mitigation loops [10]; and (2) "intrinsic methods" where cable parameters themselves are under attention for mitigation purposes, for certain phase arrangements or compacting strategies [11].…”

Section: Introductionmentioning

confidence: 99%

Series Impedance and Losses of Magnetic Field Mitigation Plates for Underground Power Cables

Gomes

Almeida

Machado

2018

IEEE Trans. Electromagn. Compat.

View full text Add to dashboard Cite

This paper deals with magnetic field mitigation techniques for underground power systems by using conductive or ferromagnetic shielding plates. Two new aspects are considered in this paper beside the shielding effectiveness analysis: the contribution to the series impedance and power losses due to the conducting set formed by the shielding plate/earth return path. A finite thickness ferromagnetic or conductive shielding is assumed buried parallel to the soil/air plane surface in order to model the induction magnetic field mitigation of a power underground cable system in flat configuration. An analytical method, appropriate to deal with possible optimization procedures, is used based on the magnetic vector potential for multilayered configurations where the shielding plate is treated as a different layer. Results for the magnetic field reduction factor at the soil surface are obtained for different shielding materials, different shielding thickness values, as well as different frequency values. Results are validated by employing the finite element analysis.

show abstract

Mitigation of the magnetic field due to underground power cables using an optimized grid

Cited by 9 publications

References 8 publications

Magnetic field evaluation around 400 KV underground power cable under harmonics effects

Magnetic field evaluation around 400 KV underground power cable under harmonics effects

A Survey on Optimization Techniques Applied to Magnetic Field Mitigation in Power Systems

Series Impedance and Losses of Magnetic Field Mitigation Plates for Underground Power Cables

Contact Info

Product

Resources

About