A novel transformerless hybrid series active filter

This paper proposes a novel configuration of Series hybrid active filters. The proposed configuration could be connected to the grid without requiring a costly series injection transformer. This topology is capable of compensating current harmonics at the source and voltage distortion at the point of common coupling. Furthermore, an appropriate controller could compel the Transformerless hybrid series active filter (THSeAF) to perform as Unified power quality conditioner (UPQC) with quazi-similar behavior. The transformerless configuration is more cost-effective than any other series compensators based mostly on a transformer to inject the compensating voltages. Moreover, as a dynamic voltage regulator, the latter will compensate unwanted harmonics, unbalances, sags, and swells at terminals of a sensitive load. When performing as a series hybrid active filter, it cleans the power system from current distortions together with harmonics and unbalances, similar to a shunt active filter. The detailed operation of the proposed topology is presented and analyzed. Modeling and controller design are given. Validation by simulations of the system dynamic for different load and supply conditions is presented.

[1]  San Shing Choi,et al.  Dynamic voltage restoration with minimum energy injection , 2000 .

[2]  Hirofumi Akagi,et al.  A Transformerless Hybrid Active Filter Using a Three-Level Pulsewidth Modulation (PWM) Converter for a Medium-Voltage Motor Drive , 2010, IEEE Transactions on Power Electronics.

[3]  K. Al-Haddad,et al.  A Novel Hybrid Series Active Filter for Power Quality Compensation , 2007, 2007 IEEE Power Electronics Specialists Conference.

[4]  Kamal Al-Haddad,et al.  A New Control Technique for Three-Phase Shunt Hybrid Power Filter , 2009, IEEE Transactions on Industrial Electronics.

[5]  Juan Dixon,et al.  Cascaded Nine-Level Inverter for Hybrid-Series Active Power Filter, Using Industrial Controller , 2010, IEEE Transactions on Industrial Electronics.

[6]  A. Chandra,et al.  A Novel Structure for Three-Phase Four-Wire Distribution System Utilizing Unified Power Quality Conditioner (UPQC) , 2006, IEEE Transactions on Industry Applications.

[7]  H. Akagi,et al.  Compensation characteristics of the combined system of shunt passive and series active filters , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[8]  G. Venkataramanan,et al.  Dynamic Voltage Restorer Utilizing a Matrix Converter and Flywheel Energy Storage , 2007, 2007 IEEE Industry Applications Annual Meeting.

[9]  Ambrish Chandra,et al.  A Novel Structure for Three-Phase Four-Wire Distribution System Utilizing Unified Power Quality Conditioner (UPQC) , 2006 .

[10]  Chi-Seng Lam,et al.  Voltage Swell and Overvoltage Compensation With Unidirectional Power Flow Controlled Dynamic Voltage Restorer , 2008, IEEE Transactions on Power Delivery.

[11]  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.

[12]  S. S. Choi,et al.  Transformerless dynamic voltage restorer , 2002 .

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

[14]  G. Oliver,et al.  A real-time power Hardware-in-the-Loop implementation of an active filter , 2010 .

[15]  Kamal Al-Haddad,et al.  Unfunctionality of the instantaneous p-q theory for the control of series active filters , 2011, 2011 IEEE Electrical Power and Energy Conference.

[16]  John L. Coburn Power Plant Report , 1913 .