Usunáriz López, IgorSantamaría Rubio, MikelMentesidi, KonstantinaAguado Alonso, Mónica2018-10-252018-10-2520152356-7635 (Print)2314-6230 (Electronic)10.1155/2015/393527https://academica-e.unavarra.es/handle/2454/31167Microgrid is principally an active distribution network since it aggregates numerous DG systems through their interface converters and different loads at distribution level. This paper discusses the power sharing in autonomous AC-microgrid infrastructure by common P-f and Q-V droop control schemes on parallel-connected converters. Moreover, this research work proposes a frequency and voltage restoration mechanism through the utilization of secondary control. Experimental results are presented for a two-50 kVA parallel-connected converter-based system, demonstrating the necessity for the proper operation of the secondary control in order to monitor the system’s capability to withstand any perturbations that may occur and to ensure the system’s security.10 p.application/pdfeng© 2015 Igor Usunariz et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.MicrogridsDroop-based convertersinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess