Control strategy for grid-connected three-phase inverters during voltage sags to meet grid codes and to maximize power delivery capability
Inverter-based distributed generation plays a vital role in the stability and reliability of new power systems. Under voltage sags, these systems must remain connected to the electrical network according to the stringent requirements of grid codes. Low-voltage ride-through control strategies are bec...
| Autores: | , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2018 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/112974 |
| Acceso en línea: | https://hdl.handle.net/2117/112974 https://dx.doi.org/10.1109/TPEL.2018.2792478 |
| Access Level: | acceso abierto |
| Palabra clave: | Distributed generation of electric power Inverters Power quality Power system stability Distributed power generation Power system reliability Reliability Oscillators Convertidors de corrent elèctric Àrees temàtiques de la UPC::Energies::Energia elèctrica::Automatització i control de l'energia elèctrica |
| Sumario: | Inverter-based distributed generation plays a vital role in the stability and reliability of new power systems. Under voltage sags, these systems must remain connected to the electrical network according to the stringent requirements of grid codes. Low-voltage ride-through control strategies are becoming a common trend in power electronics research. However, previous studies of these control strategies have not dealt with the different possible scenarios presented by new grid codes, and many of them focus on a very limited number of control objectives. In this study, an algorithm to maximize the converter capabilities was developed and subjected to experimental tests during different voltage sags. In this research, based on unbalanced voltage drops of several severity levels, six different cases of current injection are identified while taking into consideration the restrictions imposed by grid codes. The research results represent a further step towards the development of flexible controllers adaptable to the environments of intelligent electricity grids with high integration of distributed generation. |
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