Open AccessMulti level Transformer less PV Inverter with Reduced Switching Losses and Elimination of CM leakage Current
Author(s) -
Bhagyashree Karur*,
Sheik Sidthik A
Publication year - 2020
Publication title -
international journal of innovative technology and exploring engineering
Language(s) - English
Resource type - Journals
ISSN - 2278-3075
DOI - 10.35940/ijitee.k7810.0991120
Subject(s) - inverter , grid tie inverter , photovoltaic system , total harmonic distortion , maximum power point tracking , transformer , voltage , electrical engineering , common mode signal , matlab , topology (electrical circuits) , computer science , electronic engineering , control theory (sociology) , engineering , control (management) , digital signal processing , artificial intelligence , analog signal , operating system
In order to have efficient operation of grid connected Photovoltaic (PV) inverter, the issue of leakage current must be completely eliminated. For this new transformerless multilevel inverter is proposed in this paper with (k-1) levels in which k denotes the number of switches. The inverter provides zero common mode leakage current and also capable of operating under half of rated PV voltage, hence make this proposed inverter topology as LVRT (low voltage ride through) capable. Different modes are employed for the stable operation of the proposed inverter with varying input PV voltage. Simulation work is carried out for three, five and seven level proposed inverter topologies in MATLAB/Simulink software which determines its maximum power point tracking performance. Here the THD (Total Harmonic Distortions) of 3, 5 and 7 levels are compared.