A New Analog Controller for Three-Phase Four-Wire Voltage Generation Inverters

This paper introduces a new controller for three-phase four-wire inverters, with the control goal of generating high-quality three-phase output voltages for all sorts of linear/nonlinear and balanced/unbalanced loads. The proposed controller employs a circuit-level decoupling method, and it is implemented by logic circuitry in combination with a control core and a feedback signal processor. Almost all dc-dc control methods can be adapted as the control core, while the feedback signal processor can be implemented by either voltage compensator and/or current compensator. The implementation of the controller is simple and flexible with only logic and analog circuitry needed. Yet, it demonstrated experimentally excellent load handling and source voltage noise rejection ability. The prototype is tested under balanced and unbalanced resistive and nonlinear loads, as well as under extreme load transients. It is also tested with power from a noisy dc input source. In all cases, the prototype demonstrated high-quality output voltages.

[1]  V. H. Prasad.  Analysis and Comparison of Space Vector Modulation Schemes for Three-Leg and Four-Leg Voltage Source Inverters , 1997 .

[2]  Ying-Yu Tzou,et al.  High-performance programmable AC power source with low harmonic distortion using DSP-based repetitive control technique , 1997 .

[3]  Lihua Li,et al.  New Three-phase Inverter for UPS application , 2006, Conference Record of the 2006 IEEE Industry Applications Conference Forty-First IAS Annual Meeting.

[4]  Keyue Smedley,et al.  New Three-phase Inverter with Dual-Loop Compensator , 2007, APEC 07 - Twenty-Second Annual IEEE Applied Power Electronics Conference and Exposition.

[5]  Lawrence J. Borle.  Zero average current error control methods for bidirectional AC-DC converters. , 1999 .

[6]  Dushan Boroyevich,et al.  Three-dimensional space vector modulation for four-leg voltage-source converters , 2002 .

[7]  Robert Ashley Gannett,et al.  Control Strategies for High Power Four-Leg Voltage Source Inverters , 2001 .

[8]  Chongming Qiao,et al.  A general three-phase PFC controller for rectifiers with a parallel-connected dual boost topology , 2002 .

[9]  J. Uceda,et al.  Uninterruptible power supply systems provide protection , 2007, IEEE Industrial Electronics Magazine.

[10]  K.M. Smedley,et al.  One-cycle control of switching converters , 1991, PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference.

[11]  J. C. Salmon.  Reliable 3-phase PWM boost rectifiers employing a stacked dual boost converter subtopology , 1996 .

[12]  Seung-Ki Sul,et al.  A carrier-based PWM method for three-phase four-leg voltage source converters , 2004 .

[13]  Robert D. Lorenz,et al.  Control topology options for single-phase UPS inverters , 1997 .

[14]  K. M. Smith,et al.  A new PWM controller with one-cycle response , 1999 .

[15]  D. Srinivasan,et al.  Modeling and Control of Single-Phase UPS Inverters: A Survey , 2005, 2005 International Conference on Power Electronics and Drives Systems.

[16]  O. Ojo,et al.  Concise modulation strategies for four-leg voltage source inverters , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[17]  Jayati Ghosh,et al.  Nonlinear repetitive control , 2000, IEEE Trans. Autom. Control..

[18]  Poh Chiang Loh,et al.  A comparative analysis of multiloop voltage regulation strategies for single and three-phase UPS systems , 2003 .

[19]  Daniel Coutinho,et al.  Multiple-Loop H-Infinity Control Design for Uninterruptible Power Supplies , 2007, IEEE Transactions on Industrial Electronics.

[20]  Seung-Ki Sul,et al.  A PWM strategy for four-leg voltage source converters and applications to a novel line interactive UPS in a three-phase four-wire system , 2004, Conference Record of the 2004 IEEE Industry Applications Conference, 2004. 39th IAS Annual Meeting..

[21]  Richard S. Zhang,et al.  High Performance Power Converter Systems for Nonlinear and Unbalanced Load/Source , 1998 .

[22]  Robert D. Lorenz,et al.  A high performance sine wave inverter controller with capacitor current feedback and "back-EMF" decoupling , 1995, Proceedings of PESC '95 - Power Electronics Specialist Conference.

[23]  Wu Rui,et al.  Research of the Four-Leg Voltage Source Inverters Based on Space Vector Modulation in abc Coordinates , 2005, 2005 International Conference on Electrical Machines and Systems.

[24]  Paolo Mattavelli,et al.  An Adaptive Control for UPS to Compensate Unbalance and Harmonic Distortion Using a Combined Capacitor/Load Current Sensing , 2007, IEEE Transactions on Industrial Electronics.

[25]  Taotao Jin,et al.  One-cycle control of three-phase active power filter with vector operation , 2004, IEEE Transactions on Industrial Electronics.

[26]  Atsuo Kawamura,et al.  Deadbeat controlled PWM inverter with parameter estimation using only voltage sensor , 1988, 1986 17th Annual IEEE Power Electronics Specialists Conference.

[27]  Dipti Srinivasan,et al.  Analysis and Design of Iterative Learning Control Strategies for UPS Inverters , 2007, IEEE Transactions on Industrial Electronics.