Designing a Controller Circuit for Three Phase Inverter in PV application

In this paper a three phase voltage source inverter (VSI) has been simulated with controller circuit that can be used in future for hardware implementation using dSPACE 1104 controller in photovoltaic application. The dSPACE controller can be used, as it can link the MATLAB Simulink model directly into a real time operating prototype. The switching of IGBTs will be controlled by generating sinusoidal pulse width modulation (SPWM) signals with proportional integral (PI) controller circuit and parks transformation. The three phase inverter ac output voltage will be stabilized with the help of controller circuit attached to it in simulation model. Here DC voltage source is taken as the photovoltaic generator that supplying power to the three phase inverter. With this model the simulation output is showing a result of 2.83% of total harmonic distortion and supports that the controller circuit used is improving inverter ac voltage output to a great extent. This control system can be transformed into a prototype model with the dSPACE controller board as suggested in this paper.