24 PULSE AC-DC CONVERTERS FOR IMPROVED POWER QUALITY (original) (raw)

Issues of power quality are mainly concerned with the deviation of the current or voltage from its ideal waveform. The major cause of this deviation is because of the harmonics introduced by the switching of solid state devices. Such devices are of vital importance in the multiple pulse power electronic converter devices. All the switches used for power conversion will inject harmonics and all together leads to a power quality issue or event accordingly. In the present work power quality of such converters are improved by increasing the number pulses required for the ir operation. The present paper brings out 24 pulse controlled converter and the results obtained are compared with the performance of 18 pulse controlled converter. Fast Fourier Transform analysis is carried out on all the said converters and found that with the increase in number of pulses, total harmonic distortion is having a considerable reduction leading to improved power quality.