Akagi’s P-q Theory and Active Filtering under Non-sinusoidal Voltage
نویسندگان
چکیده
− This paper presents an analysis of Akagi’s pq theory for active filtering under really non-sinusoidal voltage. So, it is ascertained that compensating of alternative parts of instantaneous active and reactive powers establishes a sinusoidal current in the parallel active filter. But this is true under sinusoidal voltage only. The mathematical demonstration is found and it is verified on few practical examples. For really nonsinusoidal voltage (total harmonic distortion factor less 10%), the difference between Akagi’s active current and the true active current is very small. A modified definition of the active current is proposed for the operation under non-sinusoidal voltage conditions. The DC motor and full control rectifier driving system is used as study case.
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