TITLE:
Modified Diode Assisted Extended Boost Quasi Z-Source Inverter for PV Applications
AUTHORS:
N. Hemalatha, R. Seyezhai
KEYWORDS:
Modified Diode Assisted Extended Boost (MDAEB), Shoot-Through, THD, Boost Factor, Voltage Gain, Voltage Stress
JOURNAL NAME:
Circuits and Systems,
Vol.7 No.10,
August
25,
2016
ABSTRACT: Thedesign, simulation and implementation
of modified diode assisted extended boost q-ZSI(MDAEB q-ZSI) for photovoltaic
application are proposed in this paper. It is the most efficient topology that
provides a single stage conversion for PV systems by providing high input
voltage gain, reduced number of components count, increased voltage boost
property, reduced voltage ratings, reduced voltage stress across the switches
and simplified control strategies. Its unique capability in single stage
conversion with improved voltage gain is used for voltage buck and boost
function. The operating modes and the steady statetheoretical analysis of voltage boost,
control methods and a system design guide for the proposed topology are
investigated in this paper. A simulation model of the PV system based on MDAEB
q-ZSI has been built in MATLAB/ SIMULINK. Performance parameters such as Total
harmonic distortion (THD), voltage gain, voltage stress and boost factor are
computed and compared with the conventional quasi z-source inverter. The
prototype model for MDAEB q-ZSI is developed and the results are validated.