Performance verification of real-time harmonic sources identification system

This paper presents the performance verification of accuracy between simulation and real-time harmonic source identification system. The simulation and real-time system are implementing spectrogram as analysis technique that offers high accuracy and represent signals in time-frequency representation (TFR). From the TFR, signal parameters such as instantaneous of root mean square (RMS), fundamental RMS, total harmonic distortion (THD), total non-harmonic distortion (TnHD) and total waveform distortion (TWD) are estimated. Then, the location of harmonic sources is determined by observing the significant characteristics between fundamental and harmonic impedances. The prediction accuracy of a forecasting method which is mean absolute percentage error (MAPE) is used in performance verification of accuracy. The small difference of 0.008% of average MAPE measured between the simulation and real-time system shows that the real-time system gives a high accuracy measurement. Furthermore, the real-time system also able to identify the location of harmonic sources with 100% correct identification of harmonic sources similar to simulation. Hence, it is proven that the real-time system is accurate and reliable enough to perform harmonic sources identification.

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