a novel active power filter control methodology

this paper presents a new control methodology for active power filters that provide an adaptive online harmonic estimation with partial and selective harmonic reduction schemes, which has been implemented within an integrated controller. the proposed approach is to provide partial and selective reduction of those individual harmonics which exceed the recommended levels as set by regulatory bodies reduces the rating of active power filters thus leading to cost savings. this approach contrasts with existing techniques in which the objective is to reduce all possible harmonic components to zero. performance evaluation of the proposed technique for harmonic estimation for time-varying non-linear load is carried out when the simulation and experimental results show that the proposed control strategy provides a new alternative for harmonic reduction in power system.