Study on control method of three-phase active power filters

As one-cycle controlled three-phase active power filters (APF) only can compensate harmonic and reactive currents simultaneously, this paper uses ⁱ_p-ⁱ_q method as harmonic currents detecting circuit and one-cycle control as currents tracing control circuit. The results of simulation verify that this scheme can compensate harmonic and reactive currents effectively and flexibly.