THREE-PHASE POWER CONVERTER AND POWER CONVERTER

摘要

To obtain a power converter that can suppress the harmonics in the input current to a system to a predetermined value in a power utilization system connected a three-phase four-wire AC power supply. A power converter 5 arranged in a power utilization system 2 includes a three-phase power converter 6 that supplies power to a three-phase load 3, upon application of respective line voltages of a three-phase four-wire AC power supply 1, and a single-phase power converter 7 that supplies power to a single-phase load 4, upon application of phase voltage between a neutral line and one phase of the three-phase four-wire AC power supply 1. The three-phase power converter 6 and the single-phase power converter 7 have either one of AC-DC conversion function and AC-AC conversion function, and a predetermined harmonic suppression function, when having the AC-DC conversion function, and are respectively arranged in a number equal to or less than the number of corresponding loads. As a whole, the power converters are selected so as to suppress the harmonics in the input current to the power utilization system 2 to a predetermined value.