A Single Phase AC Grid Tied Solar Power Generation using Boost DC – AC Inverter with Modified Non-Linear State Variable Structure Control

This paper proposes a single stage solar power generation with boost dc-ac inverter by simple control technique. The boost dc-ac inverter converts and boosts a low output dc voltage of the solar pv array into a 220Vrms ac voltage at a fundamental frequency of 50Hz in single stage. A simple Modified Non-Linear State Variable Structure (MNLSVS) closed loop control technique is proposed to keep the output voltage constant barring various load conditions. Generally the double-loop control technique and voltage feedback closed loop control were used for control the output of the boost dc-ac inverter but it involves more complex control theory and not control capacitor voltages respectively. Hence it cannot give instant response under inconsistent loads. Hence the proposed control scheme maintains constant output voltage and adopts with inconsistent load conditions. Therefore the proposed MNLSVS control scheme has more desirable features such as low cost and minimum number of switches. The Total Harmonic Distortion (THD) generated by the proposed configuration is quite reasonable. The complete system is modeled using MATLAB/SIMULINK.