This paper proposes a new three-phase positive sequence detector. The scheme is based on a stationary
reference frame and a Moving Average Filter (MAF) that guarantees the complete cancellation of harmonics
and grid imbalances. The performance of the MAF is mathematically analyzed and a proper selection
of the optimal filter’s window width is realized. The proposed detector operates in open loop and
there is no PI controller to be tuned. Thus, the dynamic response and simplicity is improved compared to
other solutions. Performance of the proposed detector is verified through simulation and experiment. It
shows very good performance under extreme grid voltage conditions, allowing fast detection of the grid
voltage positive sequence (within one grid voltage cycle).
CitationRobles, E. [et al.]. Grid sequence detector based on a stationary reference frame. "EPE journal", Juny 2010, vol. 20, núm. 2, p. 57-63.
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