空心电抗器磁场分布和防护体架设研究

Research of the Magnetic Field Distribution and Protection Body Setting for Air-core Reactor

变电站投运的空心电抗器产生的强磁场是变电站磁场污染的主要来源之一。建立了计及涡流影响的空心电抗器磁场有限元模型,仿真计算了其磁场分布,并与实测数据进行比较。从职业暴露安全的角度考虑,提出了对电抗器架设防护体以改善职业暴露区磁场分布的措施。通过比较不同材料、尺寸、位置等多种情形下防护体对电抗器磁感应强度分布的影响,最终提出防护体的最优架设方案。

The strong magnetic field generated by air-core reactors is one of the main sources of magnetic contamination in substations. A magnetic field finite element model of air-core reactor, which considering the effect of eddy current, was proposed, the magnetic field distribution was calculated and compared with measured data in the paper. In considering of occupational exposure security, measurements to improve the magnetic field distribution in occupational exposure areas with setting protection body were put forward. Then the magnetic field distributions with different protection bodies were calculated and comparisons between different materials, sizes, locations and other cases of protection bodies were made. The results indicate that the optimal measure meet the occupational exposure limit.