Adaptive Power Factor Regulation Under Asymmetrical and Non-Sinusoidal Grid Condition With Distributed Energy Resource

Autor(es)

Bonaldo, Jakson Paulo ^[1] ; De Souza, Vinicius A. ^[2] ; Alonso, Augusto Matheus Dos Santos ^[2] ; Arenas, Luis De Oro ^[2] ; Marafao, Fernando Pinhabel ^[2] ; Paredes, Helmo K. Morales ^[2]

Afiliação do(s) autor(es)

^[1] Fed Univ Mato Grosso UFMT, Dept Elect Engn, BR-78060900 Cuiaba - Brazil

^[2] Sao Paulo State Univ UNESP, Inst Sci & Technol Sorocaba, BR-18087180 Sorocaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IEEE ACCESS; v. 9, p. 140487-140503, 2021.
• Citações Web of Science: 0

Resumo

Active and reactive power regulation, unbalanced current compensation, and harmonic current mitigation are the most significant functionalities typically embedded to a three-phase multifunctional grid-connected inverter. However, a vital control feature minimally addressed in the literature is the capability to adjust the grid power factor to the minimum value required by standards or grid codes. Hence, this paper presents an adaptive compensation approach to perform dynamic power factor regulation under varying power demand and unpredictable energy generation, also withstanding non-ideal voltage conditions. To demonstrate such an approach, a global power factor definition is first introduced, being validated upon bidirectional power flow conditions and under unbalanced and distorted voltages. Secondly, a simple algorithm is devised to attain scaling coefficients used on compensation purposes, allowing to instantaneously weigh up reference control signals to track a desired grid-side power factor value. As a result, the strategy can be used to retrofit the controllers of grid-connected inverters with little effort, limiting distribution losses and improving power quality. Simulations and analyses of a representative real study case are conducted to illustrate how the proposed approach copes with unpredictable distributed energy resources and variable load demands. Moreover, experimental results considering a grid-connected inverter prototype are shown to validate the feasibility of the control approach to real-life implementations. (AU)

• Processo FAPESP: 19/22304-8 - Definição de metodologias de projeto e controle de uma interface de qualidade de energia para compensação de distúrbios de tensão
• Beneficiário: Luis Armando de Oro Arenas
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 16/08645-9 - Pesquisas interdisciplinares em redes inteligentes de energia elétrica
• Beneficiário: João Bosco Ribeiro do Val
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 17/24652-8 - Desenvolvimento de metodologia de controle cooperativo de geradores distribuídos em microrredes de energia com múltiplas considerações de operação
• Beneficiário: Augusto Matheus dos Santos Alonso
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/22629-9 - Desenvolvimento de técnicas de compensação e metodologias para análise da qualidade de energia dos modernos sistemas de distribuição
• Beneficiário: Helmo Kelis Morales Paredes
• Modalidade de apoio: Bolsas no Exterior - Pesquisa