Paper Info
Title
Double voltage step-up photovoltaic microinverter
Abstract
In conventional photovoltaic microinverters configuration, a single PV module is connected to the grid through two converter stages: a step-up dc-dc stage and a step-down dc-ac stage. In the first stage, a high frequency transformer is generally used to achieve the high step-up voltage ratio conversion to a voltage above the grid peak value, reducing the converter efficiency while increasing its size. More recently single-stage step-up dc-ac configurations have been proposed to overcome these problems. However, they increase control complexity, and efficiency remains an issue due to the high step-up ratio required and being a single stage. Therefore, a two-stage configuration consisting of two consecutive step-up converters is proposed in this paper. With this scheme, it is possible to distribute the elevation effort to improve the global efficiency of the PV microinverter. The proposed topology merges a traditional boost dc-dc converter for the first stage, like in the conventional configuration, but operating with a below-grid-peak-voltage dc-link voltage. A step-up inverter is used for the second stage; it is composed of two boost converters connected in differential mode (dual boost inverter). Simulation results are provided to validate the proposed configuration.
Year
DOI
Venue
2017
10.1109/ICIT.2017.7913265
2017 IEEE International Conference on Industrial Technology (ICIT)
Keywords
Field
DocType
Microinverter,photovoltaic energy,step-up inverter
Inverter,Control theory,Solar micro-inverter,Forward converter,Maximum power point tracking,Electronic engineering,Control engineering,Converters,Charge pump,Engineering,Power optimizer,Photovoltaic system
Conference
ISBN
Citations 
PageRank 
978-1-5090-5321-6
0
0.34
References 
Authors
2
4
Name
Order
Citations
PageRank
Diana Lopez100.34
freddy floresbahamonde222.23
Renaudineau, H.322.80
Samir Kouro486583.42