A Novel Transformer-less Grid Tie Inverter for Rooftop PV system

Abstract

This paper presents a relatively new concept
for the design and implementation of a grid-tie inverter
for photo voltaic (PV) systems. The proposed method will
eliminate the uses of battery pack hence overall cost of
any PV project will be significantly reduced. As the
output of any PV array varies with the variation of solar
irradiance hence a boost converter with PID regulated
variable duty cycle has been used to keep a constant input
to the inverter. Multilevel inverter topology has been
proposed for utility grid connectivity. The proposed
design is simulated in MATLAB/Simulink and a
prototype is also implemented to verify the simulation
results. The controllers are implemented in Arduino
microcontroller board.