Nonlinear control of DC-bus voltage and power for Voltage Source Inverter

This paper presents a nonlinear control of dc-bus voltage, active and reactive powers for wind power grid connected Voltage Source Inverter (VSI). The controller exploits the backstepping scheme to calculate the required inverter's control to eliminate the instantaneous errors of dc-link voltage, active and reactive powers. The nonlinear control can increase the system effectiveness and realize voltage source control frequency. The proposed control laws are derived from the Lyapunov approach which is well suited for this nonlinear circuit. Control analysis and simulations results are obtained using Matlab/Simulink. These results show how the backstepping control laws provides an efficient control design in comparison with conventional linear control for tracking references and regulations in order to improve dc-link voltage stability. The active power and reactive power are regulated independently, and good unity power factor correction (PFC) is achieved.

[1]  Ling Xu,et al.  Direct-current vector control of three-phase grid-connected rectifierinverter , 2011 .

[2]  Mahmoud M. Amin,et al.  DC-bus voltage control of three-phase PWM converters connected to wind powered induction generator , 2010, IEEE PES General Meeting.

[3]  Chun-Yi Su,et al.  Robust adaptive control of a class of nonlinear systems with unknown backlash-like hysteresis , 2000, IEEE Trans. Autom. Control..

[4]  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.

[5]  Xu Cai,et al.  Decoupled control of active and reactive power for a grid-connected doubly-fed induction generator , 2008, 2008 Third International Conference on Electric Utility Deregulation and Restructuring and Power Technologies.

[6]  Miroslav Krstic,et al.  Nonlinear and adaptive control de-sign , 1995 .

[7]  Seung-Ho Song,et al.  Implementation and control of grid connected AC-DC-AC power converter for variable speed wind energy conversion system , 2003, Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03..

[8]  S. Sarkar,et al.  Effect of grid voltage unbalance on operation of a bi-directional converter , 2008, 2008 40th North American Power Symposium.

[9]  Hea Gwang Jeong,et al.  A sliding-mode approach to control the active and reactive powers for A DFIG in wind turbines , 2008, 2008 IEEE Power Electronics Specialists Conference.

[10]  Donghai Li,et al.  The inverse system method applied to the derivation of power system nonlinear control laws , 1997 .

[11]  Petar V. Kokotovic,et al.  Locally optimal and robust backstepping design , 2000, IEEE Trans. Autom. Control..

[12]  Jiabing Hu,et al.  Direct Active and Reactive Power Regulation of Grid-Connected DC/AC Converters Using Sliding Mode Control Approach , 2011, IEEE Transactions on Power Electronics.

[13]  Housheng Zhang,et al.  Vector Decoupling Controlled PWM Rcetifier for Wind Power Grid-Connected Inverter , 2009, 2009 International Conference on Energy and Environment Technology.

[14]  Mehrdad Kazerani,et al.  Modeling, control and implementation of three-phase PWM converters , 2003 .

[15]  Marian P. Kazmierkowski,et al.  Simple direct power control of three-phase PWM rectifier using space-vector modulation (DPC-SVM) , 2004, IEEE Transactions on Industrial Electronics.

[16]  F. G. Shinskey,et al.  2.19 Nonlinear and Adaptive Control , 2008 .

[17]  Lie Xu,et al.  Improved Direct Power Control of Grid-Connected DC/AC Converters , 2009, IEEE Transactions on Power Electronics.

[18]  Varin Vongmanee,et al.  Grid connected inverter with unity power factor for wind power applications , 2009, 2009 IEEE Symposium on Industrial Electronics & Applications.

[19]  M.E.H. Benbouzid,et al.  Sliding Mode Power Control of Variable Speed Wind Energy Conversion Systems , 2008, 2007 IEEE International Electric Machines & Drives Conference.

[20]  V. Blasko,et al.  A new mathematical model and control of a three-phase AC-DC voltage source converter , 1997 .