Modeling and design of the vector control for a three-phase single-stage grid-connected PV system with LVRT capability according to the spanish grid code
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AuthorRey Boué, Alexis Bonifacio; Guerrero Rodríguez, Nestór Francisco; Stoeckl, Johannes; Strasser, Thomas I
Knowledge AreaArquitectura y Tecnología de Computadoras
SponsorsThis work was supported by: the project "Nuevas topologias para convertidores en MT para grandes Instalaciones Fotovoltaicas" from the Spanish Government (Ref. TEC2016-80136-P) (A. B. Rey-Boue); the European Community's Horizon 2020 Program (H2020/2014-2020) in project "ERIGrid" (Grant Agreement No. 654113) under the Trans-national Access (TA) User Project: 04.003-2018.
Realizado en/conUniversidad Politécnica de Cartagena; Pontificia Universidad Católica Madre y Maestra
Bibliographic CitationRey-Boué AB, Guerrero-Rodríguez NF, Stöckl J, Strasser TI. Modeling and Design of the Vector Control for a Three-Phase Single-Stage Grid-Connected PV System with LVRT Capability according to the Spanish Grid Code. Energies. 2019; 12(15):2899. https://doi.org/10.3390/en12152899
Grid-connected photovoltaic system
Active and reactive powers
This article deals with the vector control in dq axes of a three-phase grid-connected photovoltaic system with single-stage topology and low-voltage-ride-through capability. The photovoltaic generator is built using an array of several series-parallel Suntech PV modules and is modeled as a Lookup Table (two-dimensional; 2-D). The requirements adopted when grid voltage sags occur are based in both the IEC 61400-21 European normative and the allowed amount of reactive power to be delivered according to the Spanish grid code, which avoids the disconnection of the inverter under grid faults by a limitation in the magnitude of the three-phase output inverter currents. For this, the calculation of the positive- and negative-sequences of the grid voltages is made and a conventional three-phase Phase-Locked Loop is used for the inverter-grid synchronization, allowing the control of the active and reactive powers solely with the dq components of the inverter currents. A detailed enhanced flowchart ...
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