TITLE:
A Novel Asymmetrical Single-Phase Multilevel Inverter Suitable for Hybrid Renewable Energy Sources
AUTHORS:
C. P. Boopathy, M. Kaliamoorthy
KEYWORDS:
Asymmetrical Multilevel Inverter, DC-DC Boost Converter, Photo-Voltaic, Wind Turbine, Permanent Magnet DC Generator, Maximum Power Point Tracking
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.6,
May
20,
2016
ABSTRACT: This paper introduces a
novel single-phase asymmetrical multilevel inverter suitable for hybrid
renewable energy sources. The proposed inverter consists of two isolated DC
sources and six power semiconductor controlled switches. The suggested inverter
is capable of generating seven-level output when the input DC voltage is taken
in the ratio of 1:2. The higher magnitude DC source is fed from Photo Voltaic
(PV) panels, whereas the lower magnitude DC source is fed from Wind Turbine
(WT) driven Permanent Magnet DC (PMDC) generator. Both the renewable energy
sources are connected to the inverter via two DC-DC boost converters connected
in cascade (i.e.one for
maximum power point tracking and another for DC-link voltage control). The
proposed hybrid renewable energy source inverter is connected to single-phase
grid via proper control systems. The complete system is simulated using
MATLAB/SIMULINK and the results are presented in detail.