Synchronizing a synchronverter to an unbalanced power grid using sequence component decomposition

The synchronverter is a device used in some microgrids to perform self-synchronization and represent the behavior of a synchronous machine. However, the original control has been proposed for balanced net- works, which is not present in all distribution systems. In unbalanced networks, the negative sequence may appear and generate a double frequency oscillation when delivering power or a non-symmetrical current from the inverter; thus, it must compensate unbalanced load. Therefore, this article shows that a synchronverter can be synchronized using the positive sequence even when there are voltage unbalances. The proposed strategy was simulated in the Simulink-Matlab© software, considering an unbalanced power grid with a single inverter and a load. The results confirm the effectiveness of this strategy, as the synchronverter can follow the grid frequency and the wave shape amplitude after starting the frequency droop control

• Autores: Quintero Duran, Michell J.; Candelo Becerra, John E.; Posada Contreras, Johnny
• Tipo de recurso: Article of journal
• Fecha de publicación: 2022
• Institución: Universidad Autónoma de Occidente
• Repositorio: RED: Repositorio Educativo Digital UAO
• Idioma: eng
• OAI Identifier: oai:red.uao.edu.co:10614/14742
• Acceso en línea: https://hdl.handle.net/10614/14742; https://red.uao.edu.co/
• Palabra clave: Ingeniería eléctrica; Electric engineering; Distributed generation; Droop control; Positive sequence; Symmetrical components; Synchronverter; Virtual synchronous generator
• Rights: openAccess
• License: Derechos reservados - Walter de Gruyter Gmbh, 2022