| 变压器现场超高频局部放电信号的时域特征分析 |
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| 引用本文： | 赵煦,孟永鹏,成永红,吴锴,高飞. 变压器现场超高频局部放电信号的时域特征分析[J]. 西安交通大学学报, 2011, 45(12): 82-86,128 |
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| 作者姓名： | 赵煦 孟永鹏 成永红 吴锴 高飞 |
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| 作者单位： | 1. 西安交通大学电力设备电气绝缘国家重点实验室,710049,西安
2. 陕西工业技术研究院,710054,西安 |
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| 摘 要： | 对安装在同一台变压器上的两个超高频天线传感器连续采集的电磁波信号进行时间差和累积能量比分析,采用高斯函数对电磁波时域信号进行拟合,并通过拟合曲线相似度归纳了现场超高频信号的特征拟合曲线.分析表明,时间差与累积能量比的关系可以用来判断安装在不同位置的传感器同时采集的变压器局部放电电磁波信号是否来自同一个放电源;两个传感器同时采集到的来自同一放电源的电磁波应具有较高的相似度,有助于更准确地判断电磁波是否来自同一放电源;时域拟合波形能够去除由于微小干扰导致的波形差异,能够判断变压器局部放电类型,从而可以通过超高频局部放电电磁波信号对变压器实施局部放电故障诊断.
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| 关 键 词： | 电力变压器 局部放电 超高频 电磁波 |
Time-Domain Characteristic Site Analysis for Ultra-High Frequency Partial Discharge in Power Transformer |
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| ZHAO Xu,MENG Yongpeng,CHENG Yonghong,WU Kai,GAO Fei. Time-Domain Characteristic Site Analysis for Ultra-High Frequency Partial Discharge in Power Transformer[J]. Journal of Xi'an Jiaotong University, 2011, 45(12): 82-86,128 |
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| Authors: | ZHAO Xu MENG Yongpeng CHENG Yonghong WU Kai GAO Fei |
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| Affiliation: | 1.State Key Laboratory of Power Equipment and Electrical Insulation,Xi′an Jiaotong University,Xi′an 710049,China; 2.Shaanxi Industrial Technology Research Institute,Xi′an 710054,China) |
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| Abstract: | The relationship between time-of-fight difference and accumulation energy is introduced to analyze the time-domain waveform of ultra-high frequency electromagnet(EM) wave induced by partial discharge(PD) from interior of transformer.Gauss function is applied to fit the waveform of EM,and the characteristics of EM are presented by the statistical analysis for all the fitting curves.It is shown that the relationship between time-of-flight difference and accumulation energy enables to identify whether the EM s... |
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| Keywords: | power transformer partial discharge ultra-high frequency electromagnetic wave |
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