Quantifying Harmonic Responsibilities Based on Kurtosis Detection Principle of Amplitude Fluctuations

Harmonics have brought non-negligible harm to the safe and stable operation of power systems. In order to quantify the harmonic responsibilities of different stakeholders based on available monitoring data; this paper proposes a novel method based on the kurtosis detection principle of harmonic amplitude fluctuations. The amplitude fluctuation model between the harmonic voltage and current is first established at the point of common coupling, transforming traditional fluctuation method into the amplitude field. Then, the kurtosis detection and interval estimation approaches are adopted to extract the effective fluctuation subsequences of harmonic amplitude data. Finally, the equivalent harmonic impedance of the utility side is calculated to determine the harmonic responsibilities of the utility and customer sides. Simulation and field analysis indicates that the proposed method has higher accuracy on quantifying harmonic responsibilities than the existing methods, and this method avoids the using of harmonic phase-angle data, which can be effectively applied to the practical engineering.