Study of a PV - Grid Connected System on its Output Harmonics and Voltage Variation

The effects of solar radiation level and its fluctuations on the voltage levels and power quality at the point of common coupling (PCC) of a 4.5 kWp PV-grid interactive system are reported. Radiation level, PV array output and power quality parameters at the PCC are monitored. The power quality parameters measured are the complex, active and reactive power, the power factor, the voltage and current of each harmonic - up to the 31 st harmonic. Analysis is made based on various levels of radiation (300-1000 W/m 2 ) and its rates of change (4 - 33 W/m 2 /s). It is found that at all the radiation levels and fluctuations studied, the voltage fluctuation at the PCC is 1-3 V, well within the prescribed standards. The average increase in the percentage of total harmonic distortion current