Artículo
Model Predictive Control for Common Grounded Photovoltaic Multilevel Inverter
Fecha
2022Registro en:
conference
9781665470896
10.1109/SEPOC54972.2022.9976420
Autor
Universidad San Sebastián
Universidad San Sebastián
Universidad San Sebastián
Universidad San Sebastián
De Oliveira Silveira, Kelwin
Grigoletto, Felipe B.
Carnielutti, Fernanda
Aly, Mokhtar
Norambuena, Margarita
Rodriguez, Jose
Institución
Resumen
Transformerless inverters are a compact and high efficiency solution for the grid connected Photovoltaic (PV) systems, however the leakage currents have to be mitigated. Common-Grounded (CG) inverters are an attractive solution for this trouble, once the negative pole of the PV string is directly connected to the neutral terminal, the common voltage is constant and the current is theoretically eliminated. On the other hand, multilevel CG inverters present improved quality of output voltage, however the grid current and the capacitor voltage have to be properly controlled. This paper presents Model Predictive Controllers (MPC) for a CG PV Multilevel Inverter. Two MPC structures are presented: the first that employs a classical multi-objective technique with single cost function and the second is a method that dismiss weighting factors. Simulation results are presented to demonstrate the performance of the presented controllers.