Notice of RetractionResearch on tanδ on-line monitoring method

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.

Analysis the Factors of devices tanδ on-line monitoring, in the paper, by using shield method and the coefficient correction method eliminates the impact of external effectively, And by changing sampling method of voltage signal to resolve the phase angle error of voltage transformer effect; By using a triangular window FFT method to solve the traditional algorithm the problem; Thus, to meet tanδ on-line monitoring of variety voltage devices requirements, provide the conditions for state maintenance of devices.