Power compensation device, power compensation equipment, uninterruptible power supplies, and uninterruptible power supply equipment

摘要

Providing power compensation device which can be connected between the load and the AC power source, it is possible to compensate for the voltage waveform distortion at the load end, to compensate the current waveform distortion of the AC power supply, to perform the improvement of power factor. Includes a series converter connected in series through the first reactor between the load and an AC power source, and a parallel converter unit connected through the second reactor in parallel to the load, the series converter Of the switching circuit is a series circuit constituting the parallel converter section and the section, the two switching elements, switching one circuit is common to the parallel converter and the series converter, the output of the parallel converter power compensation device being characterized in that it is the control voltage to be, as a voltage to compensate the current waveform distortion of the AC power supply in conjunction with the voltage drop of the reactor of the second.