Design And Fabrication Of Solar Cum Battery Powerd Inverter For Stand Alone and Distributed Power Generation Applications

A hybrid solar inverter is a device that combines the functionalities of a solar inverter and a battery inverter into a single unit. Its main function is to manage the flow of electricity between solar panels, batteries, and the electrical grid in a hybrid solar power system. A simple, reasonably priced converter which feeds solar generated power to an AC grid with battery backup. A push-pull inverter topology with a centre-tap step-up transformer and a push pull configuration of MOSFETs is proposed. For synchronizing with ac grid a RC series connected resistance and capacitor combination is connected across the ac supply to obtain variable leading phase angle control which controls the power feed back to the ac grid from solar inverter in ice-landing mode of operation of inverter. Solar DC energy is converted into quasi square AC power using a single phase quasi square wave three level inverter and a step-up centre-tap transformer. The output voltage and phase angle of the inverter connected to the AC bus are kept under control through duty ratio control and phase angle control, respectively.