Notice of RetractionThe Quasi-Synchronous Sampling and its Algorithms on Relay Protection

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.

For the electric power system´s protection apparatus embedding with single chip processor or DSP, a method of quasisynchronous sampling with an invariable interval is put forward in this paper, and a series of new algorithms used to measurement and protection are adopted to deal with sampling data. For those sinusoidal and non-sinusoidal electrical signals, such as voltage or current effective values, active powers, reactive powers etc., not only is the measurement circuit of quasisynchronous sampling simpler than that of synchronous sampling, but also is an accuracy closed to ideal synchronous sampling gained.