Transformerless Hybrid Power Filter Based on a Six-Switch Two-Leg Inverter for Improved Harmonic Compensation Performance

One of the most important power quality issues is related to current harmonics generated by nonlinear loads such as diode and thyristor front-end rectifiers. Well-established solutions to overcome this problem, such as active power filters (APFs), have the required high power rating components as a major disadvantage. An alternative, called hybrid power filter (HPF), mixes low power rating active filters with passive filters. Unfortunately, many of these HPF topologies have, as a common disadvantage, a great number of passive components and/or transformers. Based on this fact, new concepts of HPFs, consisting of small-rated inverters and LC filters, have been introduced with wide acceptance. The advantage comes from the fact that these HPFs are connected to the grid without any matching transformer. Recently, some topologies based on dual-converter configurations have been shown to be very attractive, where the APF (or HPF) must deal with highly nonlinear loads with high values of di/dt and supplying the reactive power together with harmonic compensation. On the other hand, the drawback of dual converters is the high number of switch devices. Therefore, this paper proposes a transformerless HPF based on a new six-switch two-leg inverter with an enhanced harmonic compensation capability. Aside from presenting a reduced number of switches when compared with dual topologies, the proposed solution is capable of providing fully compensation even for loads with high harmonic content. Experimental results are presented for an HPF inverter prototype in order to demonstrate that the harmonic compensation performance meets the IEEE 519 standard.

[1]  Wei Zhao,et al.  A Novel Three-Phase Hybrid Active Power Filter With a Series Resonance Circuit Tuned at the Fundamental Frequency , 2009, IEEE Transactions on Industrial Electronics.

[2]  Junyi Liu,et al.  Control Design and Implementation for High Performance Shunt Active Filters in Aircraft Power Grids , 2012, IEEE Transactions on Industrial Electronics.

[3]  Ke Zhou,et al.  Study on a Novel Hybrid Active Power Filter Applied to a High-Voltage Grid , 2009, IEEE Transactions on Power Delivery.

[4]  Z.J. Shen,et al.  Design Considerations for Maintaining DC-Side Voltage of Hybrid Active Power Filter With Injection Circuit , 2009, IEEE Transactions on Power Electronics.

[5]  F. Peng Harmonic sources and filtering approaches , 2001 .

[6]  Hirofumi Akagi,et al.  A medium-voltage transformerless AC/DC power conversion system consisting of a diode rectifier and a shunt hybrid filter , 2002 .

[7]  Vinod Khadkikar,et al.  Artificial-Neural-Network-Based Phase-Locking Scheme for Active Power Filters , 2014, IEEE Transactions on Industrial Electronics.

[8]  Li Peng,et al.  A Novel Design and Optimization Method of an $LCL$ Filter for a Shunt Active Power Filter , 2014, IEEE Transactions on Industrial Electronics.

[9]  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.

[10]  Marcelo Lobo Heldwein,et al.  Active Power Filter Control Strategy With Implicit Closed-Loop Current Control and Resonant Controller , 2013, IEEE Transactions on Industrial Electronics.

[11]  Hatem H. Zeineldin,et al.  A Noniterative Optimized Algorithm for Shunt Active Power Filter Under Distorted and Unbalanced Supply Voltages , 2013, IEEE Transactions on Industrial Electronics.

[12]  Luca Consolini,et al.  Active Filter for the Removal of the DC Current Component for Single-Phase Power Lines , 2013, IEEE Transactions on Industrial Electronics.

[13]  An Luo,et al.  Development of Hybrid Active Power Filter Based on the Adaptive Fuzzy Dividing Frequency-Control Method , 2009, IEEE Transactions on Power Delivery.

[14]  Avik Bhattacharya,et al.  Parallel-Connected Shunt Hybrid Active Power Filters Operating at Different Switching Frequencies for Improved Performance , 2012, IEEE Transactions on Industrial Electronics.

[15]  Hirofumi Akagi,et al.  Instantaneous power theory and applications to power conditioning , 2007 .

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

[17]  Poh Chiang Loh,et al.  An Integrated Nine-Switch Power Conditioner for Power Quality Enhancement and Voltage Sag Mitigation , 2012, IEEE Transactions on Power Electronics.

[18]  H. Akagi,et al.  A new approach to harmonic compensation in power systems , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

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

[20]  Keiji Wada,et al.  Design and Performance of a Transformerless Shunt Hybrid Filter Integrated Into a Three-Phase Diode Rectifier , 2007, IEEE Transactions on Power Electronics.

[21]  G. Griva,et al.  Improved current control strategy for power conditioners using sinusoidal signal integrators in synchronous reference frame , 2004, 2004 IEEE 35th Annual Power Electronics Specialists Conference (IEEE Cat. No.04CH37551).

[22]  F. Profumo,et al.  Current control strategy for power conditioners using sinusoidal signal integrators in synchronous reference frame , 2005, IEEE Transactions on Power Electronics.

[23]  An Luo,et al.  Design and application of a hybrid active power filter with injection circuit , 2010 .

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

[25]  Quoc-Nam Trinh,et al.  An Advanced Current Control Strategy for Three-Phase Shunt Active Power Filters , 2013, IEEE Transactions on Industrial Electronics.

[26]  Wei Shi,et al.  Design Considerations for DSP-Controlled 400 Hz Shunt Active Power Filter in an Aircraft Power System , 2012, IEEE Transactions on Industrial Electronics.

[27]  R. W. De Doncker,et al.  A new hybrid filter to dampen resonances and compensate harmonic currents in industrial power systems with power factor correction equipment , 2001 .

[28]  Frede Blaabjerg,et al.  Generalized Design of High Performance Shunt Active Power Filter With Output LCL Filter , 2012, IEEE Transactions on Industrial Electronics.