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Measurements on harmonics taken at the Gardner PhotovoltaicProject during the summer of 1987 are reported. The project includes 28 PV homes, each with a roof-mounted 2 kW PV system, connected to one phase of a 13.8 kV three-phase feeder. The measurements discussed in this paper address the topics of voltage and current distortion and power flow. Theoretical calculations were carried out in order to study the effects of PV inverters other than the type installed for this study. Computer modeling of the feeder in Gardner indicates, and measurements confirm, that small increases (0.2%) in voltage THD will occur on this feeder with the indicated penetration of PV systems using high-quality, forced commutation inverters. This paper is based on research funded by the Electric Power Research Institute under contract RP2838-1.

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