Notice of RetractionComparation of Two Detecting Harmonic and Reactive Current Methods for Active Power Filter

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

In order to study the essence and comprehensive performance of both the mainstream methods for harmonic and reactive current detecting; firstly the formulas of detected fundamental current by means of ip-iq method and dq method were deduced. Secondly it was demonstrated that the calculated formulas of the two methods detecting fundamental current are identical in spite of the differences in transformation coordinate and matrix between the two detecting methods, and consequently the identical essence of ip-iq method and dq algorithm is demonstrated directly. However, it is only two transforms that using dq method detects harmonics. That is to say the period of dq method is less than the other using DSP to realize, so the faster the dynamic response by means of dq method. The conclusion is verified by simulation results subsequently. Secondly this paper verifies the phase-angle difference which is brought by voltage asymmetry has no influence on the ultimate detecting outcome by mathematical deduce and computer simulation, which shortens the detecting period considerably by means of DSP realization and can simplify external hardware circuit.