Real-Time Disturbance Detection Using STFT Method in Microgrids

Authors:
  • AYAlper Yılmaz
    Alper Yılmaz
  • GBGökay Bayrak
    Gökay Bayrak
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Abstract
Power quality disturbances are the main concerns to be eliminated in microgrids and decrease the power quality and reliability of the grid. Numerous methods based on signal processing have been proposed in the literature for the detection of power quality disturbances. In this study, the proposed STFT-based method is applied to the voltage signal in real-time at the point of PCC in microgrids. By using the proposed method, it is tried to detection the sudden frequency changes and the over/under voltage events in case of fault conditions. As a result, the proposed method can detect faults in microgrids a very short time and with high accuracy within the limit values specified in international standards.

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