Impact of operating conditions on harmonic and interharmonic emission of PV inverters

This paper presents the results of testing and analysis investigating impact of operating conditions on harmonic and interharmonic emission of PV inverters. Tests include typical supply voltage distortion and source impedances. Measurement procedures and metrics recommended by standards for evaluating harmonic and interharmonic distortion are discussed. Finally, it is investigated how the Maximum Power Point Tracking control might impact interharmonic distortion.