Step-by-Step Controller Design for LCL-Type Grid-Connected Inverter with Capacitor–Current-Feedback Active-Damping

The injected grid current regulator and active damping of the LCL filter are essential to the control of LCL-type grid-connected inverters. Generally speaking, the current regulator guarantees the quality of the injected grid current, and the active damping suppresses the resonance peak caused by the LCL filter and makes it easier to stabilize the whole system. Based on the proportional-integral (PI) and proportional-resonant (PR) compensator together with capacitor-current-feedback active-damping which are widely used for their effectiveness and simple implementations, this paper proposes a simple step-by-step controller design method for the LCL-type grid-connected inverter. By carefully dealing with the interaction between the current regulator and active damping, the complete satisfactory regions of the controller parameters for meeting the system specifications are obtained, and from which the controller parameters can be easily picked out. Based on these satisfactory regions, it is more convenient and explicit to optimize the system performance. Besides, the insight of tuning the controller parameters from these satisfactory regions is also discussed. Simulation and experimental results verify the proposed step-by-step design method.

[1]  M. Liserre,et al.  Stability of photovoltaic and wind turbine grid-connected inverters for a large set of grid impedance values , 2006, IEEE Transactions on Power Electronics.

[2]  Frede Blaabjerg,et al.  Control in Power Electronics: selected problems , 2002 .

[3]  Yan Zhou,et al.  Parameter Design of a Two-Current-Loop Controller Used in a Grid-Connected Inverter System With LCL Filter , 2009, IEEE Transactions on Industrial Electronics.

[4]  Xinbo Ruan,et al.  Step-by-Step Controller Design for LCL-Type Grid-Connected Inverter with Capacitor–Current-Feedback Active-Damping , 2014 .

[5]  Qing-Chang Zhong,et al.  Cascaded Current–Voltage Control to Improve the Power Quality for a Grid-Connected Inverter With a Local Load , 2013, IEEE Transactions on Industrial Electronics.

[6]  Dehong Xu,et al.  A New Feedback Method for PR Current Control of LCL-Filter-Based Grid-Connected Inverter , 2010, IEEE Transactions on Industrial Electronics.

[7]  J. Svensson,et al.  Control of a voltage-source converter connected to the grid through an LCL-filter-application to active filtering , 1998, PESC 98 Record. 29th Annual IEEE Power Electronics Specialists Conference (Cat. No.98CH36196).

[8]  Christian Wessels,et al.  Limitations of Voltage-Oriented PI Current Control of Grid-Connected PWM Rectifiers With $LCL$ Filters , 2009, IEEE Transactions on Industrial Electronics.

[9]  Qing-Chang Zhong,et al.  A Current-Control Strategy for Voltage-Source Inverters in Microgrids Based on $H^{\infty }$ and Repetitive Control , 2011, IEEE Transactions on Power Electronics.

[10]  Marco Liserre,et al.  Filter-Based Active Damping of Voltage Source Converters With $LCL$ Filter , 2011, IEEE Transactions on Industrial Electronics.

[11]  L. Matakas,et al.  Gain limits for current loop controllers of single and three-phase PWM converters , 2010, The 2010 International Power Electronics Conference - ECCE ASIA -.

[12]  Fang Z. Peng,et al.  A robust control scheme for grid-connected voltage source inverters , 2010, 2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC).

[13]  Stephen J. Finney,et al.  A Modified Stationary Reference Frame-Based Predictive Current Control With Zero Steady-State Error for LCL Coupled Inverter-Based Distributed Generation Systems , 2011, IEEE Transactions on Industrial Electronics.

[14]  M. Liserre,et al.  Stability improvements of an LCL-filter based three-phase active rectifier , 2002, 2002 IEEE 33rd Annual IEEE Power Electronics Specialists Conference. Proceedings (Cat. No.02CH37289).

[15]  Friedrich Wilhelm Fuchs,et al.  PI state space current control of grid- connected PWM converters with LCL filters , 2009, 2009 IEEE Energy Conversion Congress and Exposition.

[16]  Steffan Hansen,et al.  Investigation of Active Damping Approaches for PI-Based Current Control of Grid-Connected Pulse Width Modulation Converters With LCL Filters , 2010, IEEE Transactions on Industry Applications.

[17]  Donald Grahame Holmes,et al.  Stationary frame current regulation of PWM inverters with zero steady state error , 1999, 30th Annual IEEE Power Electronics Specialists Conference. Record. (Cat. No.99CH36321).

[18]  M. Liserre,et al.  Design and control of an LCL-filter based three-phase active rectifier , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[19]  Marian P. Kazmierkowski,et al.  Current control techniques for three-phase voltage-source PWM converters: a survey , 1998, IEEE Trans. Ind. Electron..

[20]  V. Blasko,et al.  A novel control to actively damp resonance in input LC filter of a three phase voltage source converter , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[21]  Steffen Bernet,et al.  Design of $LCL$ Filters of Active-Front-End Two-Level Voltage-Source Converters , 2009, IEEE Transactions on Industrial Electronics.

[22]  Donald Grahame Holmes,et al.  Grid current regulation of a three-phase voltage source inverter with an LCL input filter , 2003 .

[23]  P. Khargonekar,et al.  State-space solutions to standard H2 and H∞ control problems , 1988, 1988 American Control Conference.

[24]  Yasser Abdel-Rady I. Mohamed,et al.  Suppression of Low- and High-Frequency Instabilities and Grid-Induced Disturbances in Distributed Generation Inverters , 2011, IEEE Transactions on Power Electronics.

[25]  Yu Zhang,et al.  Full Feedforward of Grid Voltage for Discrete State Feedback Controlled Grid-Connected Inverter With LCL Filter , 2012, IEEE Transactions on Power Electronics.

[26]  Frede Blaabjerg,et al.  Overview of Control and Grid Synchronization for Distributed Power Generation Systems , 2006, IEEE Transactions on Industrial Electronics.

[27]  Zhihong Ye,et al.  Output filter design for a grid-interconnected three-phase inverter , 2003, IEEE 34th Annual Conference on Power Electronics Specialist, 2003. PESC '03..

[28]  H. Pinheiro,et al.  Design and Implementation of a Robust Current Controller for VSI Connected to the Grid Through an LCL Filter , 2009, IEEE Transactions on Power Electronics.

[29]  Rae-Young Kim,et al.  Robust Predictive Current Controller Based on a Disturbance Estimator in a Three-Phase Grid-Connected Inverter , 2012, IEEE Transactions on Power Electronics.

[30]  C.M. Johnson,et al.  Suppression of line voltage related distortion in current controlled grid connected inverters , 2005, IEEE Transactions on Power Electronics.

[31]  Victor Cardenas,et al.  Digital Control in Power Electronics , 2006, 2006 IEEE International Power Electronics Congress.

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

[33]  P.W. Lehn,et al.  Digital Current Control of a Voltage Source Converter With Active Damping of LCL Resonance , 2006, IEEE Transactions on Power Electronics.

[34]  Ahmet M. Hava,et al.  Utility interface issues for line connected PWM voltage source converters: a comparative study , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.

[35]  D. G. Holmes,et al.  Optimized Design of Stationary Frame Three Phase AC Current Regulators , 2009, IEEE Transactions on Power Electronics.

[36]  M. Liserre,et al.  Analysis of the Passive Damping Losses in LCL-Filter-Based Grid Converters , 2013, IEEE Transactions on Power Electronics.

[37]  Yukihiko Sato,et al.  Damping of transient oscillations on the output LC filter of PWM inverters by using a virtual resistor , 2001, 4th IEEE International Conference on Power Electronics and Drive Systems. IEEE PEDS 2001 - Indonesia. Proceedings (Cat. No.01TH8594).

[38]  Xinbo Ruan,et al.  Full Feedforward of Grid Voltage for Grid-Connected Inverter With LCL Filter to Suppress Current Distortion Due to Grid Voltage Harmonics , 2010, IEEE Transactions on Power Electronics.

[39]  Robert W. Erickson,et al.  Fundamentals of Power Electronics , 2001 .

[40]  Gabriel Garcerá,et al.  An Adaptive Robust Predictive Current Control for Three-Phase Grid-Connected Inverters , 2011, IEEE Transactions on Industrial Electronics.

[41]  D. Younger,et al.  A simple derivation of Mason's gain formula , 1963 .

[42]  Geza Joos,et al.  Performance investigation of a current-controlled voltage-regulated PWM rectifier in rotating and stationary frames , 1995, IEEE Trans. Ind. Electron..