Title :
Power factor correction of three-phase diode rectifiers using optimum ripple currents injection
Author :
Sakkos, Tiiu ; Sarv, Vello
Author_Institution :
Tallinn Univ. of Technol.
Abstract :
Two new schemes of low-distorting three-phase diode-bridge rectifiers with capacitive smoothing of the output voltage are proposed, analyzed, and verified. The harmonic distortion reduction technique proposed is based on optimum injection of the third-, sixth-, and ninth-harmonic ripple currents. To improve the efficiency, the third-harmonic ripple power is re-rectified using a low-power auxiliary AC-DC converter. Function of the sixth-harmonic current branch is, firstly, to compensate inductive current component of the smoothing inductors and, secondly, to induce a small active sixth-harmonic current component that enables to reduce the total harmonic distortion THD about 2%. The ninth-harmonic current branch enables a further reduction of the THD about 1.5%. In proposed schemes, low values of the THD hold in wide range of the load and supply-voltage variation
Keywords :
AC-DC power convertors; bridge circuits; diodes; harmonic distortion; harmonics suppression; power factor correction; power inductors; rectifying circuits; smoothing circuits; THD; auxiliary AC-DC converter; capacitive smoothing; harmonic distortion reduction technique; harmonic ripple currents; low-distorting three-phase diode-bridge rectifiers; optimum ripple currents injection; power factor correction; smoothing inductors; Current supplies; Diodes; Harmonic analysis; Harmonic distortion; Power factor correction; Power harmonic filters; Power system harmonics; Rectifiers; Smoothing methods; Voltage; DC power supply; Harmonics; Power factor correction;
Conference_Titel :
Power Electronics and Applications, 2005 European Conference on
Conference_Location :
Dresden
Print_ISBN :
90-75815-09-3
DOI :
10.1109/EPE.2005.219223
