*Department of Electrical and Electronics, Muthayammal College of Engineering, Namakkal
**Department of Electrical and Electronics, Aadhithiya Institute of Technology, Coimbature
Online published on 22 April, 2015.
This paper proposes a new topology of multipulse converter which results in cost effective replacement of 12 pulse AC-DC converter by 24 pulse AC-DC converter, where 12 pulse converter is being used in industries. The proposed 24 pulse converter can reduce content of harmonics upto 21st level. The technique of pulse doubling is used to achieve 24 pulse from 12 pulse converter circuit. The pulse number is increased in order to decrease the harmonic content to meet the IEEE standard. According to IEEE, the permitted percentage of total harmonic distortion (THD) is below 5%. The topology proposed in this paper reduces THD upto 1%. The simulations are done in MATLAB simulink and comparative results of THD for different firing angles are recorded.
Converter, Harmonics, Pulse doubling, THD
