近地空间电网谐波辐射现象观测研究及形成机理探讨  

Observation and Research on Power Grid Harmonic Radiation and Its Formation Mechanism in Near Earth Space

作　　者：吴静[1] 张敬雯 阳玲 谢莉 乐超[3] WU Jing;ZHANG Jingwen;YANG Ling;XIE Li;YUE Chao(Beihang University,Haidian District,Beijing 100191,China;China Electric Power Research Institute,Haidian District,Beijing 100192,China;Peking University,Haidian District,Beijing 100871,China)

机构地区：[1]北京航空航天大学,北京市海淀区100191 [2]中国电力科学研究院有限公司,北京市海淀区100192 [3]北京大学,北京市海淀区100871

出　　处：《中国电机工程学报》2022年第13期4718-4726,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51777006)。

摘　　要：太阳准同步卫星观测表明,我国上空存在电网工频及其谐波辐射。在太阳活动和地磁活动均为平静时期,当电网谐波辐射(4~5kHz)出现时,局部电子密度有升高扰动,部分能级的高能电子通量具有减小趋势。基于磁层波粒相互作用理论,指出以右旋极化哨声模沿地磁场方向传播的数千赫兹电网谐波辐射波可与沿地磁场方向做回旋运动的高能电子发生回旋共振作用,使高能电子投掷角发生扩散,从而可能沉降到大气中,导致电子密度升高;推测电网谐波辐射波在波粒回旋共振中获得了高能电子的能量,所以能在近地空间远距离传播。随着电网的发展,其在近地空间产生的电磁效应值得密切关注。The observations from solar quasi-synchronous satellite show that there are radiations at the nominal frequency and its harmonic frequencies of power grid over China.During the period of calm solar and geomagnetic activities,the local electron density has an enhanced perturbation and the energetic electron flux in some energy bands tend to decrease when the power grid harmonic radiations in the range of 4~5kHz occurred.Based on the wave-particle interaction theory in the magnetosphere,the right hand polarized and whistle-mode power grid harmonic radiation waves at several kilohertz propagating along the geomagnetic induction line can gyro-resonate with the energetic electrons gyrating along the geomagnetic induction line,which can lead to the pitch angle scattering of electrons and make it possible for the electrons to precipitate into the atmosphere,so that the plasma electron density will increase.It is also speculated that the power grid harmonic radiation waves can obtain the energy of energetic electrons in wave-particle cyclotron resonance,which help them propagate in the near-Earth space without much attenuation.With the development of power grid,their effects deserve close attention.

关 键 词：电网谐波辐射 近地空间 卫星观测 波粒相互作用 高能电子沉降 

分 类 号：TN011.2[电子电信—物理电子学]