A Detailed Assessment of the Power Quality Improvement of an Islanded AC Microgrid through Upgrading Conventional Grid-Feeding Current-Controlled Converters to Operate as Multifunctional Converters

Sebastián de J. Manrique Machado, Juliana Cunha Neves, Sérgio A. Oliveira da Silva (), José R. B. A. Monteiro, Leonardo Poltronieri Sampaio and Leonardo B. Garcia Campanhol
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Sebastián de J. Manrique Machado: Electrical Engineering Department, Federal University of Technology-Paraná, Apucarana 86812-460, PR, Brazil
Juliana Cunha Neves: Electrical Engineering Department, Federal University of Technology-Paraná, Cornélio Procópio 86300-000, PR, Brazil
Sérgio A. Oliveira da Silva: Electrical Engineering Department, Federal University of Technology-Paraná, Cornélio Procópio 86300-000, PR, Brazil
José R. B. A. Monteiro: São Carlos Engineering School, University of São Paulo, São Carlos 13566-590, SP, Brazil
Leonardo Poltronieri Sampaio: Electrical Engineering Department, Federal University of Technology-Paraná, Cornélio Procópio 86300-000, PR, Brazil
Leonardo B. Garcia Campanhol: Electrical Engineering Department, Federal University of Technology-Paraná, Apucarana 86812-460, PR, Brazil

Sustainability, 2023, vol. 15, issue 20, 1-16

Abstract: The decarbonization of the global economy is one of society’s urgent objectives nowadays. Thus, the large-scale adoption of renewable energy sources, like solar and wind energy, seems to be the best pathway to achieving sustainable development. Thus, the microgrid concept has emerged as a solution to address concerns related to the intermittent nature and lack of inertia for such sources. Several studies involving microgrids have been published in the last few years. However, in most of them, power quality (PQ) disturbances and strategies to manage such disturbances are not considered, especially in the islanded operation mode. Hence, in this paper, a detailed assessment of the PQ of an islanded AC microgrid is conducted, considering the coexistence of a nonlinear load, voltage-controlled converters, and a current-controlled converter (CCC). The analyses consider two scenarios, depending on the operation mode of the CCC: (1) the CCC operating as a conventional grid-feeding converter and (2) considering a cost-effective upgrading of the conventional CCC to operate as a multifunctional converter. An experimental test bed is built to validate both scenarios. The presented results provide strong evidence that the AFF significantly improves the microgrid PQ and its suitability for dealing with PQ disturbances in real-world applications.

Keywords: AC micogrids; active filtering; harmonic disturbances; multifunctional inverters; power quality; renewable energy (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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