Compensation of reactive power via a frequency converter

Details Compensation of reactive power via a frequency converter Compensation of reactive power via a frequency converter

2005-04-26

2005-04-26

Han, Jessica (Department: 2838)

Electricity: power supply or regulation systems

For reactive power control

Using converter

C363S041000, C363S071000, C363S163000

Reexamination Certificate

active

06885171

ABSTRACT:
A method and an apparatus for compensating reactive power and/or harmonic currents in an alternating-current network by means of a frequency converter (1) feeding an alternating-current load (3), which frequency converter has a mains bridge (10) and at least one load bridge (11), said bridges being provided with controllable semiconductor switches. In the method, the reactive power and/or harmonic currents in the alternating-current network are measured, the load of the mains bridge of the frequency converter is measured, and the reactive power and/or harmonic currents in the alternating-current network are compensated by means of the frequency converter when the mains bridge is running at less than full capacity or has no load.

REFERENCES:
patent: 4344025 (1982-08-01), Okuyama et al.
patent: 4647837 (1987-03-01), Stemmler
patent: 5134556 (1992-07-01), Courier de Mere
patent: 5561595 (1996-10-01), Smith
patent: 43 27 162 (1994-07-01), None
patent: 8-322153 (1996-03-01), None
patent: 9-0509 (1997-01-01), None

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