空心电抗器的复合被动屏蔽结构的电磁性能分析

针对空心电抗器的漏磁场问题,通过加装多层复合式磁屏蔽装置,对空心电抗器进行磁场屏蔽,以减少目标区域内的磁场强度,达到保护目标区域内操作人员健康和设备安全的目的。在一定频率范围的正弦电流激励下,利用坡印亭定律和麦克斯韦方程推算出空心电抗器屏蔽体涡流损耗和目标观测点的屏蔽效能解析计算公式,并在涡流场中求解不同结构磁屏蔽体各层的涡流损耗和目标区域内观测点的屏蔽效能,并利用有限元仿真,对不同结构磁屏蔽的电磁性能进行评估,从而为复合式被动磁场屏蔽设计提供相应的建议和参考。

Analytic Calculation of Electromagnetic Performance of Magnetic Field of Air-Core Reactor

Aimed at the question of leakage magnetic field of air-core reactor, the corrective actions of magnetic shielding measures are taken. By installing hybrid passive magnetic shielding device, the magnetic field intensity is reduced in the aimed protected area and the health of staff and the security of equipments which working in the aimed area are protected and guaranteed. Under the excitation of sinusoidal current of certain frequency range, the analytical calculation formulas of eddy-current loss and shielding effective (SE) are solved by Poynting theorem and Maxwell equations. The finite element 3D models with different hybrid passive shielding are created to simulate the results of total eddy-current loss in shielding structure and the shielding effective of the observation point. By simulation, the electromagnetic properties of different combinations with hybrid passive shielding can be assessed and the suggestions and reference for the designers of hybrid passive magnetic shielding are provided.