  The photovoltaic microinverter based two-switch DC-DC flyback converters has
been investigated. The microinverter is characterized by the high performance
and simple design. The effect of CL and LCL low pass filter on Total Harmonics
Distortion (THD) of microinverter have been investigated. The results were
found for the cases when CL and LCL output low pass filters were applied. The
obtained results show that the efficiency and THD of the investigated
photovoltaic microinverter based on the LCL output low pass filter is lower as
compared to the case when the LC output low pass filter is utilized. The THD of
microinverter with both output low pass filters is less than 5% respect the
requirement of IEEE 1574-2014. Further, the LCL output low pass filter is used
the THD decreases by 1% compared to the CL low pass filter.
