Harmonic Identification by DQ Axis with Fourier Method for Active Power Filters

Harmonic Identification by DQ Axis with Fourier Method for Active Power Filters

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This paper proposes a new method of harmonic identification named DQ axis with Fourier (DQF) method.It lies on the basis of the DQ axis method enhanced by the sliding window Fourier analysis (SWFA).The SWFA component and the zero-sequence current considered inside the DQF method After Care account for its excellent results on harmonic elimination, and phase balancing.

Lack of phase balancing capability has been a major drawback of the DQ axis, and the SWFA methods used in conjunction with an active power iPod Adapter Cable filter.Our computing results based on measured current waveforms of three-phase four-wire systems confirm this.