Single phase shunt active power filter based on three phase pq theory

Mitigates harmonics current on single phase system. It also compensates reactive power.

This is same as three phase shunt active power filter. It takes single phase load voltage and current as input and generates signal for other two phase by delay block (delay of 1/150 second which is 2*pi/3 lag for 50Hz system). Then it calculates compensating current but injects the current of 1st phase only.