A novel PWM method of three-level rectifiers for controlling input-current harmonics at lower switching frequencies

This paper propose a novel "inverse-problems" approach to control a three-level rectifier so that the harmonic standards such as IEC 1000-3-2 class A can be met at lower switching frequencies. A conventional programmed switching method eliminates some designated harmonics of converter voltages. This results in a considerable increase in the amplitude of the residual lower harmonics and requires large input filter inductors to meet the standard. The proposed method does not eliminate the lower harmonics, but controls those amplitudes to meet the standard. As a result, the inductance required for the input filter can decrease to 45-33 % of the conventional method.

[1]  I. Barbi,et al.  An improved high-power factor and low-cost three-phase rectifier , 1997 .

[2]  Richard G. Hoft,et al.  Generalized Techniques of Harmonic Elimination and Voltage Control in Thyristor Inverters: Part I--Harmonic Elimination , 1973 .

[3]  Johann W. Kolar,et al.  A novel three-phase utility interface minimizing line current harmonics of high-power telecommunications rectifier modules , 1997, IEEE Trans. Ind. Electron..

[4]  L. Rossetto,et al.  Boost PFC with 100 Hz switching frequency providing output voltage stabilization and compliance with EMC standards , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[5]  Fang Zheng Peng,et al.  Application issues of active power filters , 1998 .

[6]  P. Ide,et al.  Analysis of three-phase/three-level rectifiers at low load and discontinuous conduction mode , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[7]  D. A. Deib,et al.  The advantages of harmonic-distortion minimization over traditional harmonic-elimination techniques , 1993, Proceedings of IEEE Power Electronics Specialist Conference - PESC '93.

[8]  K. Oguchi,et al.  A multilevel-voltage source rectifier with a three-phase diode bridge circuit as a main power circuit , 1992, Conference Record of the 1992 IEEE Industry Applications Society Annual Meeting.

[9]  Kamal Al-Haddad,et al.  A new modulation technique for reducing the input current harmonics of a three-phase diode rectifier with capacitive load , 1997 .