特高压电晕笼内正负极性导线的可听噪声频谱特性规律研究

发布时间：2018-05-01 02:28

本文选题：电晕笼 + 特高压直流线路　；参考：《中国电机工程学报》2014年18期

【摘要】：为深入研究特高压直流线路正负极导线的电晕放电机制和电晕可听噪声特性规律,基于国家电网公司特高压直流试验基地的电晕笼,对6?720 mm2导线的可听噪声频谱进行了测试和分析。利用电晕笼中间网的可拆卸功能,对电晕笼内正极、负极、正负双极导线的可听噪声进行测试,分别得出了不同电压下正极噪声、负极噪声、临近正负极导线位置的噪声频谱特性规律,并进行了对比和分析。还分析了考虑背景噪声时,在不同导线表面电场强度下电晕可听噪声A声级与其8 kHz分量的稳定性。利用曾提出的8 kHz分量法来对正极噪声、负极噪声、临近正负极导线的双极噪声在不同导线表面电场强度下的噪声特性进行了分析,得出了8 kHz分量法可适用于正极噪声和双极噪声的结论。
[Abstract]:In order to deeply study the corona discharge mechanism and the characteristics of corona audible noise of the positive and negative electrode conductors of UHV DC transmission line, the corona cage based on the UHV DC test base of State Grid Company is used. The audible noise spectrum of a 6G 720 mm2 conductor is measured and analyzed. Using the detachable function of corona cage middle net, the audible noise of positive pole, negative pole and positive negative bipolar wire in corona cage is tested, and the positive pole noise and negative pole noise are obtained under different voltages, respectively. The characteristics of noise spectrum near the position of positive and negative conductors are compared and analyzed. The stability of corona audible noise A level and its 8 kHz component under different electric field intensity of conductor surface are also analyzed. The noise characteristics of positive noise, negative noise and bipolar noise near positive and negative conductors under different electric field intensity on the surface of conductors are analyzed by using the proposed 8 kHz component method. The conclusion that 8 kHz component method can be applied to positive and bipolar noise is obtained.
【作者单位】：中国电力科学研究院;
【基金】：国家重点基础研究发展计划项目(973项目)(2011CB 209402) 国家自然科学基金项目(51107125)~~
【分类号】：TM851

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