A reduced switch transformer-less dual hybrid active power filter

This paper proposes transformer-less dual hybrid topologies suitable for rectifier type load. Performance of the reduced switch version of the network is highlighted. It consists of two inverters, one operates at a lower frequency (typically around 550Hz) and the other operates at higher frequency (around 20kHz). Less number of switches is used to improve reliability and reduce cost. The low frequency inverter is in series with a passive filter to optimally eliminate 5th and 7th harmonics, whereas the high frequency inverter is connected to a passive filter to optimally eliminate 11th and 13th harmonics in addition to the other harmonics of the load and any additional harmonics generated by the low frequency inverter. The usefulness of the proposed topology is confirmed by simulation and prototype experimentation in the laboratory.

[1]  S. Srianthumrong,et al.  A medium-voltage transformerless AC/DC power conversion system consisting of a diode rectifier and a shunt hybrid filter , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[2]  Hirofumi Akagi,et al.  A 6.6-kV Transformerless STATCOM Based on a Five-Level Diode-Clamped Converter , 2007 .

[3]  H. Akagi,et al.  Control and Performance of a Transformerless Cascade PWM STATCOM With Star Configuration , 2007, IEEE Transactions on Industry Applications.

[4]  Hirofumi Akagi,et al.  Active Harmonic Filters , 2005, Proceedings of the IEEE.

[5]  S. Bala,et al.  Reduced-switch three-phase active power filter with one cycle control , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[6]  C. Sankaran.  Power Quality , 2001 .

[7]  Subhashish Bhattacharya,et al.  Control of square-wave inverters in high power hybrid active filter systems , 1996 .

[8]  Hirofumi Akagi,et al.  A 6.6-kV transformerless STATCOM based on a five-level diode-clamped PWM converter: system design and experimentation of a 200-V, 10-kVA laboratory model , 2005 .

[9]  F. Blaabjerg,et al.  Performance Improvement of Shunt Active Power Filter With Dual Parallel Topology , 2007, IEEE Transactions on Power Electronics.

[10]  H. Akagi,et al.  A practical approach to harmonic compensation in power systems-series connection of passive and active filters , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[11]  Subhashish Bhattacharya,et al.  Active filter system implementation , 1998 .

[12]  Po-Tai Cheng,et al.  Hybrid solutions for improving passive filter performance in high power applications , 1997 .

[13]  Hirofumi Akagi,et al.  Large static converters for industry and utility applications , 2001, Proc. IEEE.

[14]  Chongming Qiao,et al.  Three-phase bipolar mode active power filters , 2002 .

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

[16]  Hirofumi Akagi,et al.  The unified power quality conditioner: the integration of series- and shunt-active filters , 1998 .

[17]  Po-Tai Cheng,et al.  Hybrid solutions for improving passive filter performance in high power applications , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[18]  Kamal Al-Haddad,et al.  A review of active filters for power quality improvement , 1999, IEEE Trans. Ind. Electron..

[19]  Hurng-Liahng Jou,et al.  Novel Circuit Topology for Three-Phase Active Power Filter , 2007, IEEE Transactions on Power Delivery.