Consensus-Based Distributed Control for Improving the Sharing of Unbalanced Currents in Three-phase Three-wire Isolated Microgrids

• Autor(a) principal: Burgos-Mellado, Claudio
• Data de Publicação: 2021
• Outros Autores: Donoso, Felipe, Llanos, Jacqueline, Martinez-Gomez, Manuel, Morales-Paredes, Helmo K. [UNESP], Torres, Miguel
• Tipo de documento: Artigo de conferência
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1109/eGRID52793.2021.9662144; http://hdl.handle.net/11449/234168
• topic: Consensus protocol; Distributed control; Imbalance Sharing; Isolated Microgrid; Single-Phase Reactive Power

This paper proposes a secondary distributed control strategy to achieve the sharing of unbalanced currents between 3-leg power converters, operating under droop control, in a three-phase three-wire isolated Microgrid (MG). To this end, a modified Q-E droop controller is used, where new control actions are defined to achieve the unbalanced currents sharing amongst the converters. These control actions are generated, in the secondary control level, by a consensus-based algorithm, where the consensus variables correspond to the single-phase reactive powers of the converters. This paper shows that sharing negative sequence current components amongst the power converters can be managed by achieving a consensus (per phase) of single-phase reactive powers. Extensive simulations demonstrate the excellent performance of the proposed controller.