Applications of Multilevel Inverter for Grid Integration of Renewable Energy Sources

Grid integration is more important and more popular in our daily life for domestic type loads for better and more output power. For grid integration some renewable energy sources (REG) is required such as photovoltaic (PV) and solar panels. Multilevel inverters are used for conversion process between photovoltaic cells to grid integration. Power electronic converters and REG are integrated to the Bus Bar, which is called as power grid. When we send more power signals to grid from solar PV system which leads to unreliability in waveforms of frequency, current and voltage, which means instability in these waveforms. With the use of PLL (Phase Lock Loop) technique, Grid synchronization of PV system is obtained successfully. With the integration of REG signals, A steady and running action of grid is obtained with the help of proposed PLL technique. With DQ axes control strategy, a stable operation of grid is done. This methodology can be done by without using a filter, so that size and cost of the system is decreases.