• ABHILASH DWIVEDI
• S DINESH KUMAR
• PRANSHITA GUPTA
• SHUBHAM SACHAN

This paper proposes a non-isolated 24-pulse controlled AC-DC convereter for medium power rating derives. The proposed AC-DC converter configuration consists of a polygon auto transformer to overcome current harmonic problems in AC mains. It improves power quality at AC mains and it meets IEEE-519 standard requirements at varying loads. A set of power quality indices on input AC mains and on DC buses for a load fed from 6-pulse and 12-pulse AC-DC converters is also given to compare their performance. The proposed 24-pulse AC–DC converter is found capable of suppressing up to the 21st harmonics in the supply current along with the power-factor improvement close to unity in the wide operating range of the drive. It involves pulse multiplication in a 12-pulse AC-DC converter. It is observed that input current total harmonic distortion (THD) of less than 8% is possible with the proposed topology of AC-DC converter at varying loads.

24-pulse, AC-DC Converter, Power Quality, Tyristor Bridge, Pulse Multiplication, Polygon Autotransformer.

"DESIGN AND ANALYSIS OF 24-PULSE AC-DC CONVERTER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.2, Issue 5, page no.1602-1609, May-2015, Available :http://www.jetir.org/papers/JETIR1505049.pdf

"DESIGN AND ANALYSIS OF 24-PULSE AC-DC CONVERTER", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.2, Issue 5, page no. pp1602-1609, May-2015, Available at : http://www.jetir.org/papers/JETIR1505049.pdf