Electrical transmission or interconnection systems – With harmonic filter or neutralizer
Patent
1996-04-10
1997-12-02
Elms, Richard T.
Electrical transmission or interconnection systems
With harmonic filter or neutralizer
333172, H02J 102
Patent
active
056939884
ABSTRACT:
A filtering device, connected between an electrical power supply source and a load, comprises an active filter connected to the source and to the load, and a passive filter connected to the load. A voltage, generated between two terminals of the active filter, is monitored by first and second circuits. The first circuit receives a signal representative of a current, and monitors the voltage according to the signal representative of the current on input of the filtering device and to a first coefficient. The second circuit receives a signal representative of a voltage, and monitors the voltage according to the voltage signal and to a second coefficient. The first and second coefficients have values variable according to the frequency.
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patent: 3849677 (1974-11-01), Stacey et al.
patent: 3900792 (1975-08-01), Moltgen
patent: 4812669 (1989-03-01), Takeda et al.
patent: 5347441 (1994-09-01), Terada et al.
patent: 5513090 (1996-04-01), Bhattacharya et al.
patent: 5548165 (1996-08-01), Mohan et al.
IEEE Transactions on Industry Applications, vol. 29, No. 1, Jan. 1993, pp. 144-152, "Compensation Characteristics of the Combined System of Shunt Passive and Series Active Filters".
EEEE Transactions on Electrical Power, vol. 4, No. 5, Sep. 1994, pp. 347-358, "Dynamic, Power-Quality-Oriented Approach to Power Theory and Compensation of Asymmetrical Systems Under Non-Sinusoidal Conditions".
Bettega Eric
Wang Miao-xin
Electricite de France
Elms Richard T.
Schneider Electric SA
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