煤矿井下变电所电气设备电磁辐射特性的测试

The measurement on the electromagnetic radiation property of electrical equipment at transformer station in the underground coal mine

测试了煤矿井下变电所的电磁环境和典型设备的电磁特性,分析了井下变电所及水泵房的近场和远场实测频谱图,并对现场测试方法进行了研究。结果表明,变压器、磁力启动器、高压开关等典型设备是变电所电磁辐射特性的主要影响因素,也是井下变电所电磁环境的主要骚扰源。水泵房电机正常工作时对电磁环境的影响不大,井下人员定位系统对电磁环境有影响,变压器对近场磁场的影响较大,真空馈电开关进线侧电缆的近场电场噪声较大。

The electromagnetic environment of the coal mine substation and the electromagnetic characteristics of typical equipments were measured. The near-field and far-field spectrums in the underground substation and pumping station were analyzed,and the measure methods were studied. The results show that typical devices like the transformers,magnetic starters,high voltage switches are the main effect factors of electromagnetic radiation in the transformer station,and also the major electromagnetic disturbance sources in underground transformer station. The pump house motors have little effects on the electromagnetic environment at normal working hours,underground personnel positioning system have some effects on the electromagnetic environment,transformer have a large influence on the near-field magnetic field,the near-field electric noise of the wire cable at entrance of the vacuum feed switches is larger.