Abstract：A fault detection algorithm is proposed to adaptively extract the characteristic component of fault signals in this paper. The algorithm used one-level stationary wavelet packet transform to decompose the signal into low-and high-frequency subbands, whose instantaneous frequency and instantaneous amplitude are calculated by Hilbert transform at the same time. Based on the preset rules of component extraction and signal decomposition, the algorithm adaptively selects the path of stationary wavelet packet decomposition, building the wavelet packet decomposition tree of the signal with a multiresolution spectral analysis. Thus the algorithm denoiseds the signal and extracts the characteristic components for fault detection. The simulation show that the algorithm provides sufficient frequency-amplitude fault information with the less computational workloads and data storage spaces. The algorithm also has a good anti-noise performance.
刘毅华, 王媛媛, 宋执环. 基于平稳小波包分解和希尔伯特变换的故障特征自适应提取[J]. 电工技术学报, 2009, 24(2): 144-149.
Liu Yihua, Wang Yuanyuan, Song Zhihuan. Adaptive Fault Feature Extraction Based on Stationary Wavelet Packet Decomposition and Hilbert Transform. Transactions of China Electrotechnical Society, 2009, 24(2): 144-149.
[1] 陈丽安, 张培铭. 基于小波变换的短路故障早期检测门限值的研究[J]. 电工技术学报, 2005, 20(3): 64-69. [2] Zhang N, Kezunovic M. Transmission line boundary protection using wavelet transform and neural network[J]. IEEE Transactions on Power Delivery, 2007, 22(2): 859-869. [3] Monsef H, Lotfifard S. Internal fault current identification based on wavelet transform in power transformers[J]. Electric Power Systems Research, 2007, 77(12): 1637-1645. [4] Tai N L, Chen J J. Wavelet-based approach for high impedance fault detection of high voltage transmission line[J]. European Transactions on Electrical Power, 2008, 18(1): 79-92. [5] Valsan S P, Swarup K S. Wavelet based transformer protection using high frequency power directional signals[J]. Electric Power Systems Research, 2008, 78(4): 547-558. [6] 胡巨, 杨明玉. 基于小波包变换的暂态保护在带TCSC输电线路中的应用[J]. 电工技术学报, 2004, 19(12):82, 83-85. [7] Eissa M M. A novel digital directional transformer protection technique based on wavelet packet[J]. IEEE Transactions on Power Delivery, 2005, 20(3): 1830-1836. [8] Eren L, Unal M, Devaney M J. Harmonic analysis via wavelet packet decomposition using special elliptic [9] Olhede S, Walden A T. A generalized demodulation approach to time-frequency projections for multicomponent signals[J]. Proceedings of the Royal Society of London, Series A, 2005, 461:2159-2179. [10] 刘毅华, 赵光宙. 基于滤波预处理的小波故障检测方法[J]. 电力自动化设备, 2007, 27(2): 51-55. [11] Walden A T, Cristan A C. The phase-corrected undecimated discrete wavelet packet transform and its application to interpreting the timing of events[J]. Proceedings of the Royal Society of London, Series A, 1998, 454:2243-2266. [12] Nielsen M. On the construction and frequency localization of finite orthogonal quadrature filters[J]. Journal of Approximation Theory, 2001, 108(1): 36-52.
2009, Vol. 24 
