Active filter for reducing non-fundamental currents and...

Details Active filter for reducing non-fundamental currents and... Active filter for reducing non-fundamental currents and...

H - Electricity

02

J

H02J 3/01 (2006.01)

Patent

CA 2122129

ABSTRACT OF THE DISCLOSURE An AC power line is monitored for currents and voltages at non-fundamental frequencies (including harmonics). A controlled active filter injects compensating current into the AC power line. The injected compensating current is responsive to both the sensed non-fundamental frequency current and to the sensed non-fundamental frequency voltage residing on the poewr line. In one embodiment, the controlled active filter comprises a transconductance amplifier which obtains its operating power from a controlled flow of power from the AC power line being monitored.

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