Title :
A low harmonic double star rectifier with current injection at DC side
Author :
Jingfang Wang ; Shiyan Yang ; Wei Yang ; Yuan Li
Author_Institution :
Dept. of Electr. Eng. & Autom., Harbin Inst. of Technol., Harbin, China
Abstract :
In order to reduce the harmonics in input currents effectively, this paper presents a double star rectifier with an auxiliary PWM rectifier at DC side. The volt-ampere rating of auxiliary PWM rectifier is only 10% of output power of the double star rectifier. The auxiliary PWM rectifier injects a particular triangular wave current into the secondary winding of inter-phase transformer to reduce the THD of input currents. The resulting system draws near sinusoidal utility line currents with less than 5 % THD. The auxiliary PWM rectifier also extracts the harmonic energy and feeds to the load. Detailed analysis of the proposed scheme is presented, and the results of experiment verify the analysis.
Keywords :
PWM rectifiers; harmonic distortion; harmonics suppression; transformer windings; DC side; THD reduction; auxiliary PWM rectifier; harmonic energy; interphase transformer secondary winding; low harmonic double star rectifier; pulse width modulated rectifier; sinusoidal utility line current; total harmonic distortion; triangular wave current injection; volt-ampere rating; Harmonic analysis; Power harmonic filters; Pulse width modulation; Pulse width modulation converters; Rectifiers; Windings; current injection; double star rectifier; harmonics; pwm rectifier;
Conference_Titel :
Electronics and Application Conference and Exposition (PEAC), 2014 International
Conference_Location :
Shanghai
DOI :
10.1109/PEAC.2014.7037980
