Power converter line synchronization using a discrete Fourier transform (DFT) based on a variable sample rate

@article{McGrath2005PowerCL,
  title={Power converter line synchronization using a discrete Fourier transform (DFT) based on a variable sample rate},
  author={B. P. McGrath and D. G. Holmes and J L Galloway},
  journal={IEEE Transactions on Power Electronics},
  year={2005},
  volume={20},
  pages={877-884}
}
Line synchronization of grid connected power converters is a well recognized problem when the grid is weak, or derives from a remote area power supply with poor frequency regulation. Such systems can suffer significant line voltage distortion due to notches caused by power device switching and/or low frequency harmonic content, which can easily corrupt the output of a conventional zero crossing detector. This paper presents a method of filtering the incoming grid voltage using a recursive… CONTINUE READING
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