不同类型500kV变电站设备区电磁环境实测分析

为了分析不同类型500 kV变电站设备区电磁环境,利用EFA-300电磁场强分析仪对3座典型变电站设备区电磁场强度进行实测。共计12个测点,测试结果显示3处类型变电站设备区电磁场强度均低于职业接触限值。在相同的工况下电磁场强度由高到低分别是AIS型变电站、HGIS型变电站、GIS型变电站,其中GIS型变电站电磁场强度远远低于公众暴露限值。对比分析结果表明,在相同工况下,不同类型的电气设备布置方式对设备区电场强度的影响非常大,磁感应强度影响较小,GIS型变电站更有利于设备区电磁污染防治。

Measurement and Analysis of Electromagnetic Environment for Equipment Area in Different Types of 500 kV Substations

In order to analyze the equipment area electromagnetic environment of different types of 500 kV substations, the electro magnetic field intensity of three typical substations is measured by EFA 300 electromagnetic field strength analyzer. The results of 12 measurement points show that all data of the three substations are within the occupational exposure limits. The electromagnetic field strength in substations of AIS, HGIS and GIS separately ranked from high to low under the same operating conditions, and the meas urements of type GIS are far below the public exposure limits. The results also indicate that the influence of different types of equip ment arrangement it quite large for electric fields intensity, small for magnetic induction strength under the same operating conditions, and GIS substations are conducive to preventing electromagnetic pollution.