Open AccessMultistring seven-level quasi Z-source based asymmetrical inverter
Author(s) -
Jammy Ramesh Rahul,
A. Kirubakaran
Publication year - 2019
Publication title -
indonesian journal of electrical engineering and computer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.241
H-Index - 17
eISSN - 2502-4760
pISSN - 2502-4752
DOI - 10.11591/ijeecs.v15.i1.pp88-94
Subject(s) - inverter , topology (electrical circuits) , photovoltaic system , matlab , network topology , voltage , upgrade , grid , control theory (sociology) , computer science , engineering , electronic engineering , electrical engineering , mathematics , geometry , control (management) , artificial intelligence , operating system
In this paper, a single-phase multistring seven-level Quasi- Z-source based Asymmetrical Inverter suitable for grid-connected photovoltaic (PV) system is presented. This topology is an upgrade of quasi- Z-source dc-dc (qZs) network and Asymmetrical multilevel inverter (AMLI). The AMLI generates higher number of levels with reduced switch count and number of sources when compared to symmetrical cascaded based MLI. The qZs network acts as an intermediate stage between the low-voltage PV array and AMLI, to enhance the output voltage gain of the inverter. The steady state performance the topology is verified through MATLAB simulation and experimentation. A laboratory prototype model is developed for a capacity of 200W to validate the theoretical studies. Finally, a c omparative assessment of the proposed with the existing topologies is presented.