Local secondary control for inverter-based islanded microgrids with accurate active-power sharing under high load conditions

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hdl:2117/119032
Document typeArticle
Defense date2018-06-13
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Rights accessOpen Access
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Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Local secondary control has been successfully used to regulate the frequency of inverterbased islanded microgrids without using communications.
In this scenario, noticeable steady-state deviations have been observed in active power sharing caused by the inherent clock drift of the digital processors that implement each inverter local control. This paper presents a control scheme that performs frequency regulation and improves the active power sharing under high load conditions, thus alleviating the impact of clock drifts in this situation. The study introduces a theoretical analysis that quantifies the steady-state deviations in active power sharing. It also includes a design procedure for the control parameters based on static and dynamic specifications.
Experimental tests validate the expected features of the proposed control. The experimental setup is based on a laboratory microgrid equipped with three independent
digital signal processors with different clock drifts.
CitationCastilla, M., Camacho, A., Miret, J., Velasco, M., Marti, P. Local secondary control for inverter-based islanded microgrids with accurate active-power sharing under high load conditions. "IEEE transactions on industrial electronics", 13 Juny 2018, p. 1.
ISSN0278-0046
Publisher versionhttps://ieeexplore.ieee.org/document/8384292/
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