Unified time-domain formulation of switching frequency for hysteresis current controlled AC/DC and DC/AC grid connected converters

This study presents a unified time-domain formulation of switching frequency for hysteresis current controlled AC/DC and DC/AC grid connected converters. It is shown that the generalised expression of switching frequency obtained can be used for any mode of operation of the converter based on phase relation between the reference AC current and grid voltage. The presented analysis provides information of maximum, minimum and average switching frequencies for all modes of the converter operation. The analytical results derived under different configurations are verified through the experimental results obtained using FPGA-based implementation of the controller for the converter. The applications of the results are shown on the three different single-phase systems operating in current control mode: (i) static synchronous compensator, (ii) boost rectifier and (iii) grid interface of wind-turbine system. The results of switching operations in these applications are verified using simulation studies performed in power systems CAD/electromagnetic transients including DC (PSCAD/EMTDC) software.

[1]  Ahmad Z Albanna,et al.  Harmonic Modeling of Hysteresis Inverters in Frequency Domain , 2010, IEEE Transactions on Power Electronics.

[2]  Arindam Ghosh,et al.  Frequency-domain characterization of sliding mode control of an inverter used in DSTATCOM application , 2006, IEEE Transactions on Circuits and Systems I: Regular Papers.

[3]  Murat Kale,et al.  An adaptive hysteresis band current controller for shunt active power filter , 2005 .

[4]  B. Bose.  An adaptive hysteresis-band current control technique of a voltage-fed PWM inverter for machine drive system , 1990 .

[5]  Donald Grahame Holmes,et al.  A simple, novel method for variable-hysteresis-band current control of a three phase inverter with constant switching frequency , 1993, Conference Record of the 1993 IEEE Industry Applications Conference Twenty-Eighth IAS Annual Meeting.

[6]  H.S.-H. Chung,et al.  Constant-frequency hysteresis current control of grid-connected VSI without bandwidth control , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[7]  Mahesh K Mishra,et al.  Dynamic Hysteresis Current Control to Minimize Switching for Three-Phase Four-Leg VSI Topology to Compensate Nonlinear Load , 2010, IEEE Transactions on Power Electronics.

[8]  Ramesh Oruganti,et al.  A unity power factor converter using half-bridge boost topology , 1998 .

[9]  G. Andersson,et al.  Interaction between hysteresis controlled inverters used in distributed generation systems , 2004, IEEE Power Engineering Society General Meeting, 2004..

[10]  Donald W. Novotny,et al.  Current Control of VSI-PWM Inverters , 1985, IEEE Transactions on Industry Applications.

[11]  C. Gatlan,et al.  AC to DC PWM voltage source converter under hysteresis current control , 1997, ISIE '97 Proceeding of the IEEE International Symposium on Industrial Electronics.

[12]  N.A. Rahim,et al.  Implementation of Hysteresis Current Control for Single-Phase Grid Connected Inverter , 2007, 2007 7th International Conference on Power Electronics and Drive Systems.

[13]  P.W. Lehn,et al.  Micro-grid autonomous operation during and subsequent to islanding process , 2005, IEEE Transactions on Power Delivery.

[14]  U. Drofenik,et al.  A novel hysteresis current control for three-phase three-level PWM rectifiers , 2005, Twentieth Annual IEEE Applied Power Electronics Conference and Exposition, 2005. APEC 2005..

[15]  Arindam Ghosh,et al.  Multiband Hysteresis Modulation and Switching Characterization for Sliding-Mode-Controlled Cascaded Multilevel Inverter , 2010, IEEE Transactions on Industrial Electronics.

[16]  Mahesh K. Mishra,et al.  An Investigation on Design and Switching Dynamics of a Voltage Source Inverter to Compensate Unbalanced and Nonlinear Loads , 2009, IEEE Transactions on Industrial Electronics.

[17]  A. W. Green,et al.  Current-forced single-phase reversible rectifier , 1989 .

[18]  R. Gupta.  Generalized Frequency Domain Formulation of the Switching Frequency for Hysteresis Current Controlled VSI Used for Load Compensation , 2012, IEEE Transactions on Power Electronics.

[19]  Arindam Ghosh,et al.  Characteristic Analysis for Multisampled Digital Implementation of Fixed-Switching-Frequency Closed-Loop Modulation of Voltage-Source Inverter , 2009, IEEE Transactions on Industrial Electronics.

[20]  Mahesh K. Mishra,et al.  Design and Analysis of User-Defined Constant Switching Frequency Current-Control-Based Four-Leg DSTATCOM , 2009 .

[21]  Ranjan K. Behera,et al.  Analysis and experimental investigation for switching frequency characterisation of a three-level ac-dc converter using frequency domain approach , 2011 .

[22]  R. Ayyanar,et al.  Optimal Variable Switching Frequency Scheme for Reducing Switching Loss in Single-Phase Inverters Based on Time-Domain Ripple Analysis , 2009, IEEE Transactions on Power Electronics.