Abstract:

It is well known that the electric component would cause harmonic interference to electric grid.Frequency converter is a typical electric component.A number of high capacity motors controlled by frequency converter are used in double shaft kiln,which generate harmonic interference to busbars.To avoid the problem,a typical systematic diagram for power supply of double shaft kiln is established by ETAP software plus the function of harmonic analysis,which can help us get total voltage distortion rate of L.T.busbar and accurate frequency spectrums for different harmonic contents.