Grid Integration and Performance Analysis of hybrid Multilevel Inverters

The hike in the use of the high-power utilization, the want for the multilevel inverter (MLI) came into picture. The multilevel inverters are designed so as to obtain higher levels of voltage using very less numbers of resources. So, the design of a hybrid reduced switch topology for the inverter started. Further sources are modified in order to obtain a very large level of voltage with a smaller number of sources. Similar effort is made to designed hybrid inverter structures for 9-level and 11-level multi-level inverters (MLIs) with significantly reduced numbers of power electronics devices and direct current power supplies. Further the topology is controlled and connected to grid using Phase Locked Loop (PLL) to analyze the performance of the inverter with the single-phase grid. A current controller is build using Proportional-Resonant (PR) controller to achieve proper integration of the MLI with the grid. The reference waveform obtained from the controller is used to achieve the inverter gate pulse using Level Shift Pulse Width Modulation (LS-PWM) technology. The 11-level MLI is more efficiently integrated into the grid than the 9-level MLI.