Open AccessPV power conditioning system using a three‐phase multilevel pulse width modulation inverter employing cascaded Scott transformers
Author(s) -
Fernão Pires Vitor,
Foito Daniel,
Cordeiro Armando
Publication year - 2019
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5586
Subject(s) - transformer , maximum power point tracking , photovoltaic system , converters , voltage source , pulse width modulation , electronic engineering , engineering , grid connection , electrical engineering , inverter , series and parallel circuits , grid connected photovoltaic power system , grid , voltage , computer science , mathematics , geometry
Voltage source inverters (VSIs) are power converters that are considered essential in grid connected photovoltaic (PV) generators. There are several types of topologies for these converters. However, from the point of view of high‐quality AC output voltage, multilevel inverters are considered the most adequate. Under this context, this study proposes a new structure for the three‐phase DC−AC conversion stage for a grid‐connected PV system. It consists of two four‐leg two‐level voltage source inverters that are connected to two PV generators. These inverters are associated with two Scott transformers. The secondary windings of the transformer are connected in a way that allows a series connection. Due to this, a multilevel operation will be achieved. The performance of the proposed power conditioning system will be verified through simulation and experimental results.