Notice of RetractionResonance over-voltage analysis of long distance varied frequency driving system

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.

Driving induction motors through long cables may cause resonance and submit the motor to over-voltage. Especially in the offshore oil exploration, the marine jumper cables usually is long, so the resonant influence is also obvious. The resonance is caused by the high order harmonics in the system, if the frequency of the harmonics is the same as or similar to the resonance frequency of the cable, it may cause the system to resonance and generate over-voltage on the motor side, and the over-voltage may damage motor. Because high order harmonics generated by inverter mainly concentrates nearby the switching frequency and multiple of switching frequency, therefore changing the switching frequency and avoid the harmonic-rich region can mitigate system resonant, and reduce the motor side over-voltage.