D-Decomposition Based Robust Discrete-Time Current Regulator for Grid-Connected VSI

Conference paper (2020)

Authors

I. Tyuryukanov Intelligent Electrical Power Grids - EEMCS
M. Popov Intelligent Electrical Power Grids - EEMCS
Research Group
Intelligent Electrical Power Grids (EEMCS) (TU Delft)
Copyright: © 2020 I. Tyuryukanov, M. Popov
DOI: https://doi.org/10.1109/ISIE45063.2020.9152394
Robust stability Current control D-decomposition LCL-filter Robust performance
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Published Date

2020

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

Intelligent Electrical Power Grids

Abstract

The D-decomposition method allows to design control structures with prescribed locations of closed loop poles. Unlike the root locus method, D-decomposition natively handles two variable regulator parameters, which makes it suitable for more complex control structures. Moreover, an extension to more than two variable parameters is straightforward. In this paper, the advantages of the D-decomposition method are illustrated by synthesizing a robust low-order current regulator for a grid-connected voltage source inverter (VSI) with LCL filter. It is shown how to visualize the complete region in the low dimensional regulator parameter space satisfying certain robust performance criteria (with robust stability being a special case). The paper concludes by simulation results validating the robustness properties of the designed low-order regulator under substantial grid impedance variations.

Files

09152394.pdf
(.pdf | 1.16 Mb)
RobustPR.pdf
(.pdf | 2.76 Mb)