A novel harmonic compensator for consumer electronic equipment using the correlation function

This paper proposes a novel harmonic compensator for consumer electronic equipment that act as harmonic voltage sources, using the correlation function. The distribution transformer is equipped with an additional winding on the secondary side, and a single-phase voltage-source PWM inverter is connected to the added winding, acting as a shunt active filter. The leakage inductor in the secondary side winding, which is connected to the consumer electronic equipment, behaves as though connected in series to the consumer electronic equipment. The shunt active filter can thus be used to compensate harmonic currents on the source side without an inductor series-connected to the harmonic voltage source. The basic principle of the proposed compensation method is discussed in detail, then confirmed using digital computer simulation. Experimental results demonstrate the validity and practicability of the proposed compensation method using the correlation function.