Adaptive Droop control for voltage and frequency regulation in isolated microgrids

Geronimo Barbosa Alexandre

ORCID iD Instituto Federal do Pernambuco Brasil

Graduação em Engenharia Elétrica (UFCG, 2013), Mestrado em Engenharia de Automação e Controle (2016) pela Universidade Federal de Campina Grande e especialização em Eficiência energética (2014) pela UFCG/PRH42/ANP. Trabalhou como engenheiro de proteção de sistemas elétricos (2013-2014), atuou como consultor e projetista de plantas de secagem do caulim com uso de energia solar e diesel (2014-2015). Foi Coordenador do Eixo de Controle e Processos no IFMA Campus Buriticupu (2015-2016). Nos anos de 2017-2018 foi Coordenador Substituto do Curso de Técnico em Eletroeletrônica. Alexandre é professor EBTT, nível DIII-1 do Instituto Federal de Pernambuco Campus Garanhuns (2016-Atualmente) e Coordenador do Curso Técnico em Eletroeletrônica (2018 ? 2019), suas áreas de interesse são: controle cooperativo de filtros ativos de potência, diagnóstico de falhas em sensores e atuadores, modelagem e simulação de processos industriais, automação inteligente, informática industrial, redes elétricas inteligentes, sistemas embarcados, projetos elétricos e aplicações de fontes alternativas de energia.

Gabriel da Silva Belém

Instituto Federal de Educação, Ciência e Tecnologia de Pernambuco (IFPE), Campus Garanhuns Brasil

Resumo

This paper proposes an adaptive droop control strategy for simultaneous regulation of voltage and frequency in isolated microgrids to meet the relevant legislation (NBR 5410 and IEEE 1547). The technique is based on the traditional structure of the Droop control (P-f) and (Q-V), aided by recursive least squares methods to estimate the line parameters. The control law is adaptive because the controller gains are self-adjusting to the operating conditions imposed by the loads and the legal restrictions for fluctuations in voltage and frequency in the microgrid. The controller was validated in different microgrids (1-bus, 3-bus, and IEEE 14-bus) and different types of loads. The simulation results show the effectiveness of the controller: rapid response in the accommodation of variations in loads; active power-sharing between the inverters and; stable and safe operation of the microgrid.

Palavras-chave


Droop control; Optimum tuning; Parametric identification; Stable operation


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Referências


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DOI: http://dx.doi.org/10.18265/1517-0306a2020v1n53p150-165

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