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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

A practical design procedure for robust H-2 controllers applied to grid-connected inverters

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Author(s):
Osorio, Caio R. D. [1] ; Koch, Gustavo G. [1] ; Oliveira, Ricardo C. L. F. [2] ; Montagner, Vinicius F. [1]
Total Authors: 4
Affiliation:
[1] Fed Univ Santa Maria UFSM, Santa Maria, RS - Brazil
[2] Univ Estadual Campinas, UNICAMP, Campinas, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: CONTROL ENGINEERING PRACTICE; v. 92, NOV 2019.
Web of Science Citations: 0
Abstract

This paper provides as contribution an efficient design procedure based on the choice of only one parameter, leading to robust H-2 current controllers suitable for three-phase grid-connected inverters operating under grid variations. As the main advantage, the procedure proposed here provides performances similar to suitably designed discrete linear quadratic regulators, but with a significantly lower design effort. The controller relies on the robust H-2 design paradigm in terms of linear matrix inequalities, in the scenario of uncertain and time-varying grid parameters, also considering the rejection of broad-band frequency disturbances. Experimental and real-time simulation results show grid currents with low harmonic content, complying with the requirements of the IEEE 1547 Standard. The approach can also cope with grid impedance variations over large intervals and be applied for different sets of filters parameters. The good trade-off between robustness, suitable experimental results, and low control design effort, as demonstrated by design examples in the paper, makes the proposed procedure a useful alternative for robust current control in this application. (AU)

FAPESP's process: 17/18785-5 - Parameter-Dependent Linear Matrix Inequalities Applied to Stability Analysis and Synthesis of Controllers and Filters for Uncertain Dynamic Systems
Grantee:Pedro Luis Dias Peres
Support type: Regular Research Grants