Thiran filter‐based fractional delay compensation for grid‐tied converters

Sunwoo Rhee; Sungmin Lee; Kwonhoon Kim; Younghoon Cho

Thiran filter‐based fractional delay compensation for grid‐tied converters

Vol. 24, No. 7, pp. 1129-1138, Jul. 2024

10.1007/s43236-024-00841-1

Repetitive controller

Grid-tied converter

Fractional delay

Lagrange interpolation

Thiran filter

Fractional delay filter-based repetitive controller

Abstract

This paper proposes fractional delay filter-based repetitive controllers (FDF-RCs) for grid-tied converters. Finite impulse response filters and infinite impulse response filters are used to estimate the fractional-order delay filter in a conventional repetitive controller. To do this, both the Lagrange filter-based repetitive controller (LF-RC) and Thiran filter-based repetitive controller (TF-RC) are utilized as FDF-RCs to compensate a fractional delay. The operating principle, the ladder structure, and the performance analysis of FDF-RCs are addressed. The simulation and the experimental results on a single-phase grid-tied converter verify the harmonic suppression ability and reference-tracking performance of the proposed FDF-RC under the grid frequency variation. Moreover, the advantages of the TF-RC over the LF-RC are discussed by comparing and analyzing the simulation and experimental results.

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Cite this article

[IEEE Style]

S. Rhee, S. Lee, K. Kim, Y. Cho, "Thiran filter‐based fractional delay compensation for grid‐tied converters," Journal of Power Electronics, vol. 24, no. 7, pp. 1129-1138, 2024. DOI: 10.1007/s43236-024-00841-1.

[ACM Style]

Sunwoo Rhee, Sungmin Lee, Kwonhoon Kim, and Younghoon Cho. 2024. Thiran filter‐based fractional delay compensation for grid‐tied converters. Journal of Power Electronics, 24, 7, (2024), 1129-1138. DOI: 10.1007/s43236-024-00841-1.