PV To Grid Connected Multilevel Inverter With Hybrid Modulation Technique

In this article, a grid-connected photovoltaic system based on multilayer inverters (MLI) is modeled. The cascaded T-type inverter is responsible for developing the MLI topology. Connecting the PV sources in series raises the input voltage, making it challenging to connect other MLI circuits to the grid. Three-level buck-mode operation is produced by this cascaded T-type multilevel inverter (CT2MLI), which has the following benefits: a low peak inverse voltage (PIV), a low total harmonic distortion (THD), a low switching loss, and a minimal number of switches. The perturb and observe (P&O) MPPT technique is used to get the maximum power from a PV array. To simplify the gate pulse generation process, CT2MLI employs a hybrid level-shifted and phase-shifted pulse width modulation (PWM) approach. Low dv/dt stress across the switches, low peak inverse voltage (PIV), and low total harmonic distortion (THD). The maximum power point tracking (MPPT) technique perturbs and watches the PV array to obtain the greatest power. To simplify the gate pulse generation process, CT2MLI employs a hybrid level-shifted and phase-shifted pulse width modulation (PWM) approach. The efficiency of the control strategy for the grid-connected PV system based on CT2MLI is shown by the MATLAB simulation results.