Novel Switching pattern for single-stage current source inverter for grid-connected photovoltaics

Abstract

Environmental pollution and economic issues are major problems which result in an ascending increase of renewable sources such as photovoltaic and fuel cells. The low DC-voltage generated by these sources needs to be boosted to the level of the grid before being inverted. A single stage three-phase boost inverter is utilised to perform the action of increasing and inverting. A switching algorithm is applied to this topology to control the charging time and discharging interval of converters inductor. A simple control strategy is applied to this configuration which is responsible for regulating the transfer power to the maximum amount and also to justify the amount of THD in minimum point. Simulation results performed in MATLAB software show the effectiveness of using this switching strategy and control approach. Experimental results are presented to verify the simulation results.