| 摘要 |
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.
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