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我国空间电力线谐波辐射现象分析

DOI: 10.13700/j.bh.1001-5965.2013.0759, PP. 1672-1677

Keywords: 电力线谐波辐射,电离层,时频分析,功率谱,特高压输电,电磁环境

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Abstract:

研究了利用DEMETER卫星电磁场探测数据辨识电力线谐波辐射(PLHR,PowerLineHarmonicRadiation)事件的方法,探讨了我国空间中PLHR事件的特点.通过采用时频分析和Welch功率谱估计法分析了2005—2010年6年我国空间中的全部卫星电场强度探测数据,共发现151例PLHR事件,给出了PLHR事件的统计分析和典型实例.结果表明我国空间PLHR事件的频率分布在1000~4500Hz之间,多为50Hz的奇数倍,间隔为50/100Hz.PLHR事件与我国电网发展和变化有密切关系,与地磁活动水平无关,呈现出昼夜差异和季节差异.最后给出了影响PLHR事件探测的可能因素.

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