Open AccessGrid tied single‐stage inverter for low‐voltage PV systems with reactive power control
Author(s) -
Sreekanth Thamballa,
Lakshminarasamma Narasimhamurthy,
Mishra Mahesh K.
Publication year - 2018
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.2017.0786
Subject(s) - ac power , maximum power point tracking , grid , power factor , control theory (sociology) , controller (irrigation) , photovoltaic system , maximum power principle , power (physics) , inverter , computer science , engineering , voltage , electrical engineering , control (management) , mathematics , physics , geometry , quantum mechanics , artificial intelligence , biology , agronomy
Single‐stage DC–AC converter systems (SSCSs) are developed by merging both DC–DC and DC–AC conversion processes. These SSCS transfer power from photovoltaics (PV) to loads/grid in one stage. In this study, a PV‐based grid tied single‐stage DC–AC converter system (GTSS) for low‐voltage PV systems is presented. Generally, when SSCSs are connected to the grid, grid voltage template is used to generate reference current which is to be tracked. In doing so, the GTSS delivers power to the grid at a power factor other than unity. A suitable control scheme is implemented in this study to control active and reactive powers’ flow from the GTSS to the grid while continuously operating PV at maximum power point. The proposed control scheme of GTSS has attributes such as less complexity and requires simple proportional integral controller. Modelling of control loops in the proposed control scheme is mentioned. A detailed MATLAB/SIMULINK‐based simulation and experimental studies are conducted to validate the proposed control scheme.