| 局部放电干扰评价参数信噪比的二阶估计 |
| |
| 引用本文： | 唐炬,李伟,姚陈果,张晓星,谢颜斌.局部放电干扰评价参数信噪比的二阶估计[J].中国电机工程学报,2011(7). |
| |
| 作者姓名： | 唐炬 李伟 姚陈果 张晓星 谢颜斌 |
| |
| 作者单位： | 输配电装备及系统安全与新技术国家重点实验室(重庆大学); |
| |
| 基金项目： | 国家重点基础研究发展计划项目(973项目)(2009CB724506); 国家优秀博士论文基金(200749)~~ |
| |
| 摘 要： | 针对实测局部放电(partial discharge,PD)信号去噪的盲目性,提出对PD信号受干扰程度先作估计评价再决定是否需要去噪的思想。运用二阶统计理论,对构造的实测PD信号相关矩阵进行奇异值分解,将得到的奇异值空间划分为代表信号能量和噪声能量的子空间,建立表征信号和噪声能量大小的判别规则,对PD信号受干扰程度评价参数信噪比(signal-to-noise ratio,SNR)进行二阶估计。通过对模拟与实测PD信号的SNR二阶估计对比分析表明,该二阶估计能很好地判断PD信号受干扰程度,为后续PD信号的去噪处理提供理论依据。
|
| 关 键 词： | 电力系统 局部放电 相关矩阵 评价参数 奇异值分解 信号去噪 |
Two-order Estimation of Interference Evaluation Parameter SNR on Partial Discharge |
| |
| TANG Ju,LI Wei,YAO Chenguo,ZHANG Xiaoxing,XIE Yanbin,Shapingba District,Chongqing ,China.Two-order Estimation of Interference Evaluation Parameter SNR on Partial Discharge[J].Proceedings of the CSEE,2011(7). |
| |
| Authors: | TANG Ju LI Wei YAO Chenguo ZHANG Xiaoxing XIE Yanbin Shapingba District Chongqing China |
| |
| Affiliation: | TANG Ju,LI Wei,YAO Chenguo,ZHANG Xiaoxing,XIE Yanbin(State Key Laboratory of Power Transmission Equipment & System Security and New Technology(Chongqing University),Shapingba District,Chongqing 400044,China) |
| |
| Abstract: | It is blind that the signal process of actual partial discharge(PD) signals always is first denoised and then analyzed,and this paper proposed the idea that the signal-to-noise ratio(SNR) estimation of noise interference degree on PD source signals is first implemented and then the subsequent signal processing is carried on.2-order statistical theory was employed to construct autocorrelation matrix of PD source signals for the singular value decomposition,to build up the rules that reflect the energy of PD ... |
| |
| Keywords: | power system partial discharge correlation matrix evaluation parameter singular value decomposition signal denoising |
| 本文献已被 CNKI 等数据库收录！ |
|
