Current-Controller Effectiveness for Grid-Connected Converters: Comparative Case Studies
Publication: Journal of Energy Engineering
Volume 144, Issue 1
Abstract
This paper describes the implementation and comparison of two current-control strategies for a three-phase voltage source inverter (VSI) system grid connected via a LCL filter and used in distributed power generation systems (DPGS) applications. The performance of a proportional integrator (PI) current controller in the dq-synchronous reference frame and a proportional resonant (PR) controller in the stationary reference frame are evaluated and compared. A voltage source (playing the role of a generic renewable energy source) is connected to the grid using a two-level inverter in order to verify the performance of the proposed approach. Both methods are implemented and tested at the laboratory-level using a dSPACE setup. The comparative study is performed to demonstrate the stability and effectiveness of the control algorithms across a wide range of operating conditions. The experimental results confirm that the proposed control achieves good current tracking, thus satisfying the grid-connection harmonics standards.
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Acknowledgments
This work was supported by a grant under ERANet-LAC Call, entitled ELAC2015/T10-0761, RETRACT.
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Information
Published In
Journal of Energy Engineering
Volume 144 • Issue 1 • February 2018
Copyright
©2017 American Society of Civil Engineers.
History
Received: Jan 31, 2017
Accepted: Jul 7, 2017
Published online: Nov 8, 2017
Published in print: Feb 1, 2018
Discussion open until: Apr 8, 2018
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