Modelling of a Novel Eight Switch 15-Level Asymmetric Inverter for PV Sources

Increased demand and availability of fossil fuels are the major issues in the power sector. The PV modules generate solar power. The output of the PV module is DC, but to supply this to AC loads, it is needed to converter to AC. Conventional inverters suffer from harmonics and EMI problems. This led to the design of multi-level inverters to reduce the inverter's harmonic content. However, the available multilevel inverters use many switching devices as output levels increase. Also, these are symmetric inverters unsuitable for PV applications due to variable irradiance and temperature. To overcome these problems, this research proposed an asymmetric inverter using eight power switches, which give the 15-level output from the asymmetrical DC sources. The suggested topology's fewer switches minimize the size and switching losses, increasing system effectiveness. The SHEPWM controls this inverter. The inverter's output voltage profile and efficiency are further enhanced by the SHEPWM's effective reduction of the particular harmonics. The switching angles of the proposed MLI are optimized using a hybrid Adaptive Particle Swarm Optimization (APSO) and Newton Raphson algorithm (NR) to eliminate more complex harmonics.