Control strategy for hardware simplification of voltage source converter-based power applications

A hardware simplification control strategy for three-phase voltage-source-converter-based power applications is presented. The main goal of the proposal is to reduce the number of sensors needed to implement the controller while maintaining the high performance of the system. To this end, ac-voltage and dc-current sensors are replaced by software sensors based on state observers. Consequently, a more rugged, smaller and cheaper realisation can be accomplished. Regarding the voltage source converter controller, an energy function and the reactive power of the converter are considered as outputs for constructing a feedback law based on the feedback linearisation technique. In this way, internal dynamics is avoided. In order to improve controller performance, estimates of the load power and its time derivative are feedforwarded. The ac-voltages and load power estimates are obtained by designing a reduced-order non-linear observer. Several tests, with a realistic voltage source converter model that takes into account the switching power devices, validate the proposed technique. They evaluate the system performance in the presence of parameter uncertainties and disturbances in the AC input voltage.

[1]  Malabika Basu,et al.  Comparative evaluation of two models of UPQC for suitable interface to enhance power quality , 2007 .

[2]  Philippe Lataire,et al.  Control of a three-phase PWM rectifier using estimated AC-side and DC-side voltages , 1999 .

[3]  Ming-Yang Cheng,et al.  Design and implementation of a high-performance bidirectional DC/AC converter for advanced EVs/ HEVs , 2006 .

[4]  Md. Enamul Haque,et al.  Incorporating control trajectories with the direct torque control scheme of interior permanent magnet synchronous motor drive , 2009 .

[5]  Jan T. Bialasiewicz,et al.  Power-Electronic Systems for the Grid Integration of Renewable Energy Sources: A Survey , 2006, IEEE Transactions on Industrial Electronics.

[6]  Hong-Seok Song,et al.  Source voltage sensorless estimation scheme for PWM rectifiers under unbalanced conditions , 2003, IEEE Trans. Ind. Electron..

[7]  R. Portillo,et al.  Power Electronic Systems for the Grid Integration of Wind Turbines , 2006, IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics.

[8]  Katsuhiko Ogata,et al.  Modern Control Engineering , 1970 .

[9]  R. Iravani,et al.  Dynamic model and control of AC-DC-AC voltage-sourced converter system for distributed resources , 2007, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.

[10]  M. P. Bahrman,et al.  Voltage source converter transmission technologies: the right fit for the application , 2003, 2003 IEEE Power Engineering Society General Meeting (IEEE Cat. No.03CH37491).

[11]  Vladimir Blasko,et al.  A novel control method of a VSC without AC line voltage sensors , 2001 .

[12]  Leon M. Tolbert,et al.  A generalised instantaneous non-active power theory for STATCOM , 2007 .

[13]  Mariusz Malinowski,et al.  Virtual flux based direct power control of three-phase PWM rectifiers , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[14]  Y.-A. Chapuis,et al.  Advanced common control method for shunt and series active compensators used in power quality improvement , 2004 .

[15]  Eduardo P. Wiechmann,et al.  Complex state-space modeling and nonlinear control of active front-end converters , 2005, IEEE Transactions on Industrial Electronics.

[16]  T. C. Green,et al.  State-space model of grid-connected inverters under current control mode , 2007 .

[17]  H.-P. Liu,et al.  A novel sensorless control method for brushless DC motor , 2009 .

[18]  B.-R. Lin,et al.  Three-phase three-level active power filter with a clamped capacitor topology , 2006 .

[19]  Chi Kwan Lee,et al.  A randomized voltage vector switching scheme for three-level power inverters , 2002 .

[20]  Dong-Choon Lee,et al.  AC voltage and current sensorless control of three-phase PWM rectifiers , 2002 .

[21]  Cheng-Kai Lin,et al.  Sensorless interior permanent magnet synchronous motor drive system with a wide adjustable speed range , 2009 .

[22]  Dong-Choon Lee,et al.  Control of Single-Phase-to-Three-Phase AC/DC/AC PWM Converters for Induction Motor Drives , 2007, IEEE Transactions on Industrial Electronics.

[23]  Seung-Ki Sul,et al.  Sensorless Operation of a PWM Rectifier for a Distributed Generation , 2007, IEEE Transactions on Power Electronics.

[24]  Boon-Teck Ooi,et al.  Nonlinear Control of Voltage-Source Converter Systems , 2007, IEEE Transactions on Power Electronics.

[25]  L.A. Serpa,et al.  A Virtual-Flux Decoupling Hysteresis Current Controller for Mains Connected Inverter Systems , 2007, IEEE Transactions on Power Electronics.

[26]  A. Teel,et al.  Tools for Semiglobal Stabilization by Partial State and Output Feedback , 1995 .

[27]  A.E. Leon,et al.  An Adaptive Nonlinear Controller for DFIM-Based Wind Energy Conversion Systems , 2008, IEEE Transactions on Energy Conversion.

[28]  M. Nakaoka,et al.  Advanced control of PWM converter with variable-speed induction generator , 2006, IEEE Transactions on Industry Applications.

[29]  L. Weimers.  HVDC Light: A New Technology for a Better Environment , 1998, IEEE Power Engineering Review.

[30]  Johan Driesen,et al.  Model-based generation of low distortion currents in grid-coupled PWM-inverters using an LCL output filter , 2006, IEEE Transactions on Power Electronics.

[31]  A.E. Leon,et al.  Software Sensor-Based STATCOM Control Under Unbalanced Conditions , 2009, IEEE Transactions on Power Delivery.

[32]  Sinisa Djurovic,et al.  Dynamic model for doubly-fed induction generators with unbalanced excitation, both with and without winding faults , 2009 .

[33]  C. Muravchik,et al.  Feedback linearization via state transformation using estimated states , 2001, Int. J. Syst. Sci..

[34]  Faa-Jeng Lin,et al.  Recurrent wavelet neural network controller with improved particle swarm optimisation for induction generator system , 2009 .

[35]  Weiping Li,et al.  Applied Nonlinear Control , 1991 .

[36]  Tarek Ahmed,et al.  Advanced control for PWM converter and variable-speed induction generator , 2007 .

[37]  H. Khalil,et al.  Output feedback stabilization of fully linearizable systems , 1992 .

[38]  Bong-Hwan Kwon,et al.  A line-voltage-sensorless synchronous rectifier , 1999 .

[39]  Jorge A. Solsona,et al.  High-performance control of a three-phase voltage-source converter including feedforward compensation of the estimated load current , 2009 .

[40]  Toshihiko Noguchi,et al.  Direct power control of PWM converter without power source voltage sensors , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.