Abstract
In this study, an efficient technique to improve and maintain the voltage levels of Cascaded H-Bridge Multi-Level Inverter (CHB-MLI) which utilizing PhotoVoltaic (PV) panel sources is presented. It is designed to make fifteen level output voltage and tested under the various levels of resistive loads. It produces staircase output with reduced component size, increases the output voltage level, reduces the voltage stress across the load/switches, reduces the Total Harmonic Distortion (THD) and increases the voltage gain. The switching pulses are generated using Phase Opposition Disposition (POD)-Pulse Width Modulation (PWM) technique. It is modeled and simulated using SIMULINK graphical programming environment in MATLAB. Results prove that the system provides lower THD than conventional systems.
Highlights
The use of PV based energy sources are more popular nowadays and are used in generation and distribution frameworks and electric vehicles etc
It consists of a PV source and Cascaded H-Bridge Multi-Level Inverter (CHB-MLI) driven by Phase Opposition Disposition (POD)-Pulse Width Modulation (PWM) technique
All switches are controlled by PWM pulses which are generated using POD-PWM method
Summary
The use of PV based energy sources are more popular nowadays and are used in generation and distribution frameworks and electric vehicles etc. The DCAC power converters including the voltage and current source inverter are used to acquire a suitable output from PV energy resources for such applications. PV systems are becoming much familiar than other renewable energy resources due to their advantages such as less maintenance, pollution-free and no fuel cost. PV generation system requires advanced electronic devices for better power quality, to increase the generation and for proper utilization of generated energy [1,2,3]. Multilevel inverters are more attention due to its attractive features such as maximum power, small voltage stress on the switch, and high output voltage gain with small harmonics [4,5]
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