Design of active loops for magnetic field mitigation in MV/LV substation surroundings

Del-Pino-López, Juan Carlos; Giaccone, Luca; Canova, Aldo; Cruz-Romero, Pedro

doi:10.1016/j.epsr.2014.10.019

Cited by 12 publications

(6 citation statements)

References 23 publications

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“…Usually, the edge effects due to a local increase of the magnetic flux density close to the edges of the shield have to be taken into account in the design [30]. For this reason, it is a good approach to discretize the region of interest and minimize the average magnetic flux density rather than minimize the value at a single point or the maximum value [31]. However, in the case of a MSR, it is sufficient to focus on the center of the room because, as the volume is completely surrounded by the metallic material, common edge effects of flat and open shields are avoided.…”

Section: Optimization Methodsmentioning

confidence: 99%

Identification of Material Properties and Optimal Design of Magnetically Shielded Rooms

et al. 2021

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In this paper, we propose an optimal design procedure for magnetically shielded rooms. Focusing on multi-layer ferromagnetic structures, where inner layers operate at very low magnetic field, we propose an identification method of the magnetic material characteristic in the Rayleigh region. A numerical model to simulate the shielding efficiency of a multi-layer ferromagnetic structure is presented and experimentally tested on different geometries and layer configurations. The fixed point iterative method is adopted to handle the nonlinearity of the magnetic material. In conclusion, the optimization of the design parameters of a MSR is discussed, using the Vector Immune System algorithm to minimize the magnetic field inside the room and the cost of the structure. The results highlight that a linear magnetic characteristic for the material is sufficient to identify the suitable geometry of the shield, but the nonlinear model in the Rayleigh region is of fundamental importance to determine a realistic shielding factor.

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Section: Optimization Methodsmentioning

confidence: 99%

Identification of Material Properties and Optimal Design of Magnetically Shielded Rooms

et al. 2021

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“…Unlike passive loops, active loops are supplied by external power sources to inject the required current (magnitude and phase) at any moment, being able to provide a much higher mitigation reduction. This solution has been analyzed mainly in OHL [26,27,80,81] and MV/LV substations [28,82,83]. However, this mitigation system may be much more complex and more expensive than passive ones.…”

Section: Active Loopsmentioning

confidence: 99%

“…A similar procedure is later presented in [82,83], where GA is used to optimize different active loop configurations for the MF mitigation in different volumes around and above a MV/LV substation. Opposite to [28], in this work, the active system is composed of three pairs of loops installed in the walls of the volume to be protected, with each pair supplied by one power source.…”

Section: Active Loopsmentioning

confidence: 99%

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

2019

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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.

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“…The methods of synthesis of SAS for MF, generate by HVPL, was developed in [13][14][15][16][17][18][19][20][21][22][23][24]. The initial data for the synthesis of the system is the parameters of the transmission lines (working currents, geometry and number of wires, location of the transmission lines relative to the protected space) and the dimensions of the protected space and the standard value of the magnetic flux density, which should be achieved as a result of shielding.…”

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confidence: 99%

High Voltage Power Lines Magnetic Field System of Active Shielding With Compensation Coil Different Spatial Arrangement

Kuznetsov

Nikitina

Bovdui

2019

Elektroteh. elektromeh.

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Aim. The synthesis of single-circuit system of active shielding of magnetic field, generated by group of high voltage power lines, with different spatial arrangement of shielding coil. Methodology. The synthesis is based on the decision of a multi-criteria stochastic game, in which the vector payoff is calculated on the basis of the Maxwell equations solutions in the quasi-stationary approximation. The game decision is based on the stochastic multiagent optimization algorithms by multiswarm particles. The initial parameters for the synthesis of active shielding system are the location of the high voltage power lines with respect to the shielding space, geometry and number of shielding coils, operating currents, as well as the size of the shielding space and normative value magnetic flux density, which should be achieved as a result of shielding. The objective of the synthesis of the active shielding system is to determine their number, configuration, spatial arrangement, wiring diagrams and shielding coils currents, setting algorithm of the control systems as well as the resulting of the magnetic flux density value at the points of the shielding space. Results. Three variant of single-circuit robust system of active shielding with different spatial arrangement of shielding coil synthesis results for reduction of a magnetic field generated by group of high voltage power lines is given. The possibility of a significant reduction in the level of magnetic flux density of the magnetic field source within and reducing the sensitivity of the system to uncertainty of the plant parameters is given. Originality. For the first time carried out the synthesis, theoretical and experimental research of the robust system of active shielding of magnetic field generated by group of high voltage power lines with different spatial arrangement of compensation coil. Practical value. Practical recommendations from the point of view of the practical implementation on reasonable choice of the spatial arrangement of shielding coil of robust singlecircuit system of active shielding of the magnetic field generated by the group of high voltage power lines is given. References 49, figures 9. Key words: high voltage power lines, power frequency magnetic field, robust system of active shielding, multi-criteria stochastic game. Цель. Синтез одноконтурной робастной системы активного экранирования магнитного поля, создаваемого группой высоковольтных линий электропередачи, с различным пространственным расположением экранирующей обмотки. Методология. Синтез основан на решении многокритериальной стохастической игры, в которой векторный выигрыш вычисляется на основании решений уравнений Максвелла в квазистационарном приближении. Решение игры находится на основе алгоритмов стохастической мультиагентной оптимизации мультироем частиц. Исходными параметрами для синтеза системы активного экранирования являются расположение высоковольтных линий электропередачи по отношению к защищаемому пространству, геометрические размеры, количество проводов и рабочие ток...

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Design of active loops for magnetic field mitigation in MV/LV substation surroundings

Cited by 12 publications

References 23 publications

Identification of Material Properties and Optimal Design of Magnetically Shielded Rooms

Identification of Material Properties and Optimal Design of Magnetically Shielded Rooms

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

High Voltage Power Lines Magnetic Field System of Active Shielding With Compensation Coil Different Spatial Arrangement

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