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

Alexis B. Rey-Boué, N. F. Guerrero-Rodríguez, Johannes Stöckl and Thomas I. Strasser
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Alexis B. Rey-Boué: Department of Electronics, Computers Technology and Projects, Universidad Politécnica de Cartagena, c/Dr. Fleming, s/n, 30202 Cartagena, Spain
N. F. Guerrero-Rodríguez: Engineering Sciences, Pontificia Universidad Católica Madre y Maestra PUCMM, Av. Abraham Lincoln Esq. Romulo Betancourt, Santo Domingo 2748, Dominican Republic
Johannes Stöckl: AIT Austrian Institute of Technology—Center for Energy, Giefinggasse 2, A-1210 Vienna, Austria
Thomas I. Strasser: AIT Austrian Institute of Technology—Center for Energy, Giefinggasse 2, A-1210 Vienna, Austria

Energies, 2019, vol. 12, issue 15, 1-28

Abstract: 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 of the control algorithm with low-voltage-ride-through capability is presented and several simulations and experiments using Matlab/SIMULINK and the Controller Hardware-in-the-Loop simulation technique, respectively, are run for several types of one- and three-phase voltage sags in order to validate its behavior.

Keywords: vector control; low-voltage-ride-through; grid-connected photovoltaic system; voltage sags; active and reactive powers (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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