Active filter for reducing non-fundamental currents and voltages

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

1992-08-25

1995-03-14

Pellinen, A. D.

Electrical transmission or interconnection systems

With harmonic filter or neutralizer

363 39, H02M 112, H02J 301

Patent

active

053979273

ABSTRACT:
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 power 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.

REFERENCES:
patent: 3531652 (1970-09-01), Aemmer et al.
patent: 3628057 (1971-12-01), Mueller
patent: 4020361 (1977-04-01), Suelzle et al.
patent: 4135101 (1979-01-01), Young et al.
patent: 4206398 (1980-06-01), Janning
patent: 4209757 (1980-06-01), Becker
patent: 4224660 (1980-09-01), Mohan
patent: 4812669 (1989-03-01), Takeda et al.
patent: 4835411 (1989-05-01), Takeda
patent: 4906860 (1990-03-01), Asaeda
patent: 5162983 (1992-11-01), Kumagai
patent: 5172009 (1992-12-01), Mohan
patent: 5198746 (1993-03-01), Gyugyi et al.
"Active Injection Mode Filter" by L. Suelzle; date unknown.
PCT International Search Report, PCT/US93/07985, Date of the Actual Completion of the International Serach 21 Dec. 1993, Date of Mailing of this International Search Report Jun. 1, 1994, International Searching Authority: European Patent Office.
"A New Injection Method for AC Harmonic Elimination by Active Power Filter" by G. Choe and M. Park, IEEE Transactions on Industrial Electronics, vol. 35, No. 1, Feb. 1988, pp. 141-147.
"A New Approach to Harmonic Compensation in Power Systems--A Combined System of Shunt Passive and Series Active Filters" by F. Z. Peng, H. Akagi and A. Nabae, IEEE Transaction on Industry Applications, vol. 26, No. 6, Nov./Dec. 1990, pp. 983-990.

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