Input Filter Design with Static Power Converters

Most static power converters are nonlinear systems which produce undesired harmonics in the three-phase input lines of the supply power system. These harnonics cause distorted voltage waveforms and must be reduced specially in large power applications. The methods of reducing undesired hannonics with special emphasis on designing input filters to reduce the undesired harmonics are discussed. The design of the input filters in general affects the performance of the converter. These effects are discussed for a single-phase voltage controller with an input filter.