13-12-2012, 04:56 PM
AC Harmonics Filters.
AC Harmonics Filters.ppt (Size: 377.5 KB / Downloads: 30)
INTRODUCTION
The 3-phase bridge converter used in HVDC transmission should convert pure sinusoidal AC waveform to pure DC form. But in practice the operation of converter generates harmonic currents and harmonic voltages on AC side and DC side. These harmonics do not interfere with converter operation but they flow through ac lines and thereby produce the following harmful effects :
Harmonic filters are provided on A.C.side for following purposes :
To reduce harmonic voltages and currents in the A.C. power network to acceptable limits.
To provide all or a part of reactive consumed by the converter, the additional reactive power being supplied by shunt capacitor banks.