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A new real-time algorithm of wavelet transform for detection of sudden-changing signals of power systems

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Abstract

With a complex wavelet function, a new real-time recursive algorithm of wavelet transform (WT) is analyzed in detail. Compared with the existing recursive algorithm in two directions, the computing time is greatly reduced in response to faults signals in power systems, and the same recursive algorithm can be generalized to other wavelet functions. With the phases and magnitudes of complex WT coefficients under the fast recursive algorithm, a method to detect faults signals of power systems is presented. Lastly, the analyzing results of some signals show that it is effective and practical for the complex wavelet and its real-time recursive algorithm to detect faults of power systems.

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Authors and Affiliations

  1. College of Electrical Engineering, Chongqing University, 400044, Chongqing, China

    Jianjun He

  2. South China University, 510640, Guangzhou, China

    Zhen Ren & Wenying Huang

  3. Central China Power Group Co., 430077, Wuhan, China

    Hong Zhou & Tao Lin

Authors
  1. Jianjun He
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  2. Zhen Ren
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  3. Wenying Huang
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  4. Hong Zhou
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  5. Tao Lin
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Additional information

Project supported by Guangdong Province Natural Science Foundation and Central China Electric Power Group Co.

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He, J., Ren, Z., Huang, W. et al. A new real-time algorithm of wavelet transform for detection of sudden-changing signals of power systems. Sci. China Ser. E-Technol. Sci. 42, 609–615 (1999). https://doi.org/10.1007/BF02916997

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  • DOI: https://doi.org/10.1007/BF02916997

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