A novel PWM control scheme for a three‐phase current source inverter of a photovoltaic (PV) generation system connected to a utility is proposed. The PV‐array output power can be adjusted by controlling the modulation factor in the proposed PWM pattern. The harmonic components of the output currents can be decreased sufficiently to satisfy the requirements of the Interactive Guidelines. Furthermore, a new Maximum Power Point Tracking control is proposed. The inverter output current should be detected, and the modulation factor may be controlled so as to obtain the maximum effective current. The inverter output power can be maintained at the maximum power point despite fluctuations of panel temperatures, insolation levels, and system voltages. © 2001 Scripta Technica, Electr Eng Jpn, 135(1): 43–55, 2001

A novel PWM control scheme for the three-phase current source inverter in the photovoltaic power system interconnected to the utility is proposed.The PV-array output power can be adjusted by the modulation factor in the proposed PWM pattern.The harmonic components in the output currents can be decreased sufficiently in order to satisfy the conditions of the Interactive Guideline.Furthermore, a new Maximum Power Point Tracking control is proposed.The inverter output current should be detected and the modulation factor may be controlled so as to obtain the maximum effective current.The inverter output power can be maintained on the Maximum Power Point for the fluctuations of panel temperatures, insolation levels and system voltages.