Apparatus for reducing subsynchronous frequencies in a power...

Details Apparatus for reducing subsynchronous frequencies in a power... Apparatus for reducing subsynchronous frequencies in a power...

H - Electricity

02

H

317/6

H02H 7/06 (2006.01)

Patent

CA 1134901

ABSTRACT OF THE DISCLOSURE A protective circuit for reducing subsynchronous natural resonant frequency signals in a multiphase power supply system includes a damping resistor connected in series with each phase winding of the system. A resonant circuit tuned to the rated line frequency of the system is connected in parallel with each resistor so that signals having frequencies other than the rated line frequency will be damped by the resistors. An inductor can also be placed in parallel with each resistor to maximize the damping effect of each resistor at predetermined subsynchronous frequencies. -1-

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