空间中的电力系统辐射及其形成机理

Power System Radiation in Space and its Formation Mechanism

利用对DEMETER卫星电场探测数据的时频分析,对我国近地空间电离层中的电力线谐波辐射及基频辐射事件进行了研究,并分析了它们发生的地理位置.得出基频辐射频率与相应地面电力系统采用的频率一致,基频辐射的持续时间和空间范围覆盖谐波辐射.讨论了架空输电线路的地线在不同接地方式下成为有效辐射源的可能性,没有架设地线或地线采用分段绝缘单点接地方式的架空输电线路是较强的辐射源.

Based on time frequency analysis of electric field data observed by DEMETER satellite, the power line harmonic radiation and fundamental frequency radiation events in the near Earth space above China were investigated and their occurring geographical locations were analyzed. The fundamental frequency related well to the frequency of corresponding ground power system. The duration of fundamental frequency radiation covered harmonic radiation. Different grounding modes of overhead ground wires and their possibilities to become effective radiators were discussed. The overhead transmission lines without ground wires or adopting sectional insulation with single point grounding mode are strong radiators.