In this work, a new modular multilevel inverter topology is introduced for a single phase grid connected
Photovoltaic system. This multilevel inverter use less number of switches to generate seven levels compared
to other conventional multilevel inverters. This requires only one isolated dc source to operate. So it is suitable
for renewable energy application. This inverter is designed by submodule configuration; each sub module
contains two switches and one DC link capacitor. The sub modules will be added to the inverter depending
on number of levels. The voltage balancing of DC link capacitor is carried out by Y matrix PWM technique.
Because of Y matrix PWM technique, the inverter gets a self capacitor voltage balancing ability. So there is no
need of external devices required for balancing the voltage of capacitor. A PLL for grid integration and LCL
filter are designed and integrated with this inverter. The simulation of proposed system is carried out by
MATLAB/SIMULINK and performance of THD is monitored as per standards
A New Step-Up Switched-Capacitor Voltage Balancing Converter for NPC Multilevel Inverter-Based Solar PV System