我国空间电力线谐波辐射现象分析

发布时间：2018-01-21 18:20

本文关键词： 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　出处：《北京航空航天大学学报》2014年12期 　论文类型：期刊论文

【摘要】：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,Power Line Harmonic Radiation)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1 000~4 500 Hz之间,多为50 Hz的奇数倍,间隔为50/100 Hz.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.
[Abstract]:The identification of power line harmonic radiation (PLHR) using electromagnetic field detection data of DEMETER satellite is studied. The method of the Power Line Harmonic radiation event. The characteristics of PLHR events in Chinese space are discussed. By using time-frequency analysis and Welch power spectrum estimation method, the total number of satellite electric field intensity detections in Chinese space from 2005 to 2010 is analyzed. According to. A total of 151 cases of PLHR events were found. The statistical analysis and typical examples of PLHR events are given. The results show that the frequency distribution of spatial PLHR events in China is between 1 000 and 4 500 Hz, most of which are odd times of 50 Hz. The 50/100 Hz.PLHR event is closely related to the development and change of power grid in China, and has nothing to do with the level of geomagnetic activity. There are diurnal and seasonal differences. Finally, the possible factors affecting the detection of PLHR events are given.
【作者单位】：北京航空航天大学自动化科学与电气工程学院;
【基金】：国家自然科学基金资助项目(51207006) 北京市自然科学基金资助项目(3123038)
【分类号】：TM751
【正文快照】： 网络出版地址:www.cnki.net/kcms/doi/10.13700/j.bh.1001-5965.2013.0759.html电力线谐波辐射(PLHR,Power Line Harmon-ic Radiation)特指空间电离层和磁层中观测到的来源于地面电力系统中的高次谐波辐射现象,在电场强度时频功率密度谱图中其表现为分布在5 k Hz以内,强度高于

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