Presentation Details
| Autonomous Control of Inverters in Unbalanced Microgrids Through an Extended CERTS Droop Scheme Ricardo Calloquispe-Huallpa1, Rachid Darbali-Zamora2, Anny Huaman-Rivera1, Erick E.Aponte-Bezares1. 1University of Puerto Rico, Mayagüez, PR, USA.2Sandia National Laboratories, Albuquerque, NM, USA |
Abstract
This paper presents an extended control strategy, based on the CERTS droop concept, designed to enhance the performance of inverters operating under unbalanced conditions. The proposed approach introduces a per-phase control structure that enables independent regulation of voltage and active power for each phase. This modification allows the inverter to maintain stable operation even when voltage and current asymmetries are present, thereby overcoming the limitations of conventional droop controllers that rely on a single amplitude and frequency reference. Simulation results obtained from unbalanced electrical systems, including a real rural microgrid model from Puerto Rico, demonstrate that the proposed controller ensures voltage and frequency stability, accurate power sharing, and a robust dynamic response under different load and operating conditions. Compared with the traditional CERTS scheme, the proposed method provides higher flexibility and adaptability, making it a promising solution for decentralized control in unbalanced microgrids and distributed generation systems.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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