HARMONIC CURRENT COMPENSATION APPARATUS AND AIR CONDITIONING SYSTEM

摘要

A harmonic current compensator 15 is connected in parallel with a load 13 to a system power supply 11 and supplies a compensation current la to limit a harmonic component contained in a load current IL to be input from the system power supply 11 to the harmonic generating load 13. The harmonic current compensator 15 includes: a load current detector 31 that detects the load current IL; a compensation current detector 33 that detects the supplied compensation current la; a control amount computing portion 47 that computes a control amount of the compensation current la based on the harmonic component contained in the load current IL detected by the load current detector 31 and the compensation current la detected by the compensation current detector 33; and a limiter 49 that limits an upper limit of the compensation current Ia.