American Journal of Electrical Power and Energy Systems

Volume 4, Issue 1, January 2015

  • Detection and Identification of PQ Disturbances Using S-Transform and Artificial Intelligent Technique

    Ahmed Hussain Elmetwaly, Abdelazeem Abdallah Abdelsalam, Azza Ahmed Eldessouky, Abdelhay Ahmed Sallam

    Issue: Volume 4, Issue 1, January 2015
    Pages: 1-9
    Received: Feb. 05, 2015
    Accepted: Feb. 15, 2015
    Published: Mar. 02, 2015
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    Abstract: This paper proposes a new technique based on S-transform time-frequency analysis and Fuzzy expert system for classifying power quality (PQ) disturbances. The S-transform is a new time frequency analysis method. It has the features of both continuous wavelet transform (CWT) and short time Fourier transform (STFT). Through S-transform time-frequency ... Show More
  • Factors Affecting the Harmonics Generated by a Group of CFLs: Experimental Measurements

    Muhyaddin J. H. Rawa, David W. P. Thomas

    Issue: Volume 4, Issue 1, January 2015
    Pages: 10-16
    Received: Feb. 09, 2015
    Accepted: Feb. 26, 2015
    Published: Mar. 04, 2015
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    Abstract: The penetration of nonlinear loads on power systems increases the harmonics that can cause detrimental problems to power systems such as an increase in voltage distortion, equipment failure, system resonance, increase system losses and decrease system efficiency. Many factors affect the harmonics produced by nonlinear loads. Hence, the aim of this ... Show More