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Adaptive repetitive control with feedforward scheme for grid-connected inverters

Adaptive repetitive control with feedforward scheme for grid-connected inverters
Adaptive repetitive control with feedforward scheme for grid-connected inverters
This study is concerned with control of grid connected inverters using odd-harmonic repetitive scheme. Owing
to the inherent long convergence period of repetitive control, a feedforward loop of the fundamental component of the
grid voltage is used to make sure that the inverter’s output current is bounded during the convergence period. The
well-known deficiency of repetitive control in rejecting harmonics when used with varying grid frequency has been
solved by using an adaptive scheme in which the switching and sampling frequencies vary with respect to the grid
frequency. The main qualities of the proposed controller are its effectiveness, simplicity and straightforwardness of
implementation using a digital signal processor. Simulation and practical results are presented to demonstrate the
controller capabilities.
adaptive control, power system control, invertors, power system interconnection, power grids
1755-4535
1-8
Abusara, Mohammad
4b927b5e-0c68-45bb-8d01-4c22d94ccc7a
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Zanchetta, Pericle
f0581c99-1dcc-4c28-9d5a-33d4449332fa
Abusara, Mohammad
4b927b5e-0c68-45bb-8d01-4c22d94ccc7a
Sharkh, S.M.
c8445516-dafe-41c2-b7e8-c21e295e56b9
Zanchetta, Pericle
f0581c99-1dcc-4c28-9d5a-33d4449332fa

Abusara, Mohammad, Sharkh, S.M. and Zanchetta, Pericle (2015) Adaptive repetitive control with feedforward scheme for grid-connected inverters. IET Power Electronics, 1-8.

Record type: Article

Abstract

This study is concerned with control of grid connected inverters using odd-harmonic repetitive scheme. Owing
to the inherent long convergence period of repetitive control, a feedforward loop of the fundamental component of the
grid voltage is used to make sure that the inverter’s output current is bounded during the convergence period. The
well-known deficiency of repetitive control in rejecting harmonics when used with varying grid frequency has been
solved by using an adaptive scheme in which the switching and sampling frequencies vary with respect to the grid
frequency. The main qualities of the proposed controller are its effectiveness, simplicity and straightforwardness of
implementation using a digital signal processor. Simulation and practical results are presented to demonstrate the
controller capabilities.

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More information

Accepted/In Press date: 7 February 2015
e-pub ahead of print date: 27 April 2015
Keywords: adaptive control, power system control, invertors, power system interconnection, power grids
Organisations: Mechatronics

Identifiers

Local EPrints ID: 376479
URI: https://eprints.soton.ac.uk/id/eprint/376479
ISSN: 1755-4535
PURE UUID: eea3f91f-50cc-4bb5-83eb-d8ec0f929867

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Date deposited: 30 Apr 2015 08:53
Last modified: 16 Oct 2017 23:07

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