| 局部放电在线监测中干扰的识别及抑制方法的研究 |
| |
| 引用本文： | 杨永明,孙才新,李新. 局部放电在线监测中干扰的识别及抑制方法的研究[J]. 仪器仪表学报, 1999, 20(3): 242-243,267 |
| |
| 作者姓名： | 杨永明 孙才新 李新 |
| |
| 作者单位： | 重庆大学电气工程系,重庆,400044 |
| |
| 摘 要： | 本文在分析了电力变压器局部放电在线监没中的干扰及局放信号特性的基础上，对局放信号及干扰的功率谱进行了研究，提出了利用频域分析识别周期性干扰，并通过数字陷波滤波器抑制周期性干扰的方法，以时频功率谱为基础，研究了自相关函数的小波变换及与时频功率谱的关系，提出了利用小波变换从白噪声中提取局放信号的方法。
|
| 关 键 词： | 局部放电 干扰 识别 抑制 在线监测 电力变压器 |
The Study of Interferences Distingushing and Rejecting in Partial Discharge Monitoring on Line |
| |
| Yang Yongming,Sun Caixin,Li xin. The Study of Interferences Distingushing and Rejecting in Partial Discharge Monitoring on Line[J]. Chinese Journal of Scientific Instrument, 1999, 20(3): 242-243,267 |
| |
| Authors: | Yang Yongming Sun Caixin Li xin |
| |
| Affiliation: | Chongqing University Chongqing 400044 |
| |
| Abstract: | this paper, we analyze the interferences in PD monitoring on line and the characteristics of the inter ferences and PD signal. The interferences and PD signal's power spectrums are studied. The method of distingushing and liminating periodic interferences through frequency domain analysis and digital wave trap filter is propossed. The concept of time--frequency power spectrum is presented. The relations between the time-- frequency power spectrum and the wavelet transform of auto--correlation function is also studied. The method of PD signal's drawing from white noise is presented. |
| |
| Keywords: | Partial discharge Interference Distingushing Rejecting |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
