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Control of grid-connected inverters using adaptive repetitive and proportional resonant schemes

Control of grid-connected inverters using adaptive repetitive and proportional resonant schemes
Control of grid-connected inverters using adaptive repetitive and proportional resonant schemes
Repetitive and proportional-resonant controllers can effectively reject grid harmonics in grid-connected inverters because of their high gains at the fundamental frequency and the corresponding harmonics. However, the performances of these controllers can seriously deteriorate if the grid frequency deviates from its nominal value. Non-ideal proportional-resonant controllers provide better immunity to variations in grid frequency by widening resonant peaks at the expense of reducing the gains of the peaks, which reduces the effectiveness of the controller. This paper proposes a repetitive control scheme for grid-connected inverters that can track changes in grid frequencies and keep resonant peaks lined up with grid frequency harmonics. The proposed controller is implemented using a digital signal processor. Simulation and practical results are presented to demonstrate the controller capabilities. Results show that the performance of the proposed controller is superior to that of a proportional-resonant controller.
grid-connected inverters, repetitive control, adaptive frequency control
1598-2092
518-528
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) Control of grid-connected inverters using adaptive repetitive and proportional resonant schemes. Journal of Power Electronics, 15 (2), 518-528. (doi:10.6113/JPE.2015.15.2.518).

Record type: Article

Abstract

Repetitive and proportional-resonant controllers can effectively reject grid harmonics in grid-connected inverters because of their high gains at the fundamental frequency and the corresponding harmonics. However, the performances of these controllers can seriously deteriorate if the grid frequency deviates from its nominal value. Non-ideal proportional-resonant controllers provide better immunity to variations in grid frequency by widening resonant peaks at the expense of reducing the gains of the peaks, which reduces the effectiveness of the controller. This paper proposes a repetitive control scheme for grid-connected inverters that can track changes in grid frequencies and keep resonant peaks lined up with grid frequency harmonics. The proposed controller is implemented using a digital signal processor. Simulation and practical results are presented to demonstrate the controller capabilities. Results show that the performance of the proposed controller is superior to that of a proportional-resonant controller.

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Published date: March 2015
Keywords: grid-connected inverters, repetitive control, adaptive frequency control
Organisations: Mechatronics

Identifiers

Local EPrints ID: 376377
URI: http://eprints.soton.ac.uk/id/eprint/376377
ISSN: 1598-2092
PURE UUID: 27a0038d-04d0-4db9-beba-530bfb7a5533

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Date deposited: 27 Apr 2015 12:26
Last modified: 04 Nov 2019 20:17

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Contributors

Author: Mohammad Abusara
Author: S.M. Sharkh
Author: Pericle Zanchetta

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