Improved load-adaptive control strategy for PMSG based stand-alone wind energy generation system

This paper presents a novel load-adaptive control strategy for stand-alone wind energy generation system using a permanent magnet synchronous generator (PMSG). Since there is no grid supply in a stand-alone system, the output voltage has to be controlled in the constant amplitude and frequency by the load-side PWM converter. To improve the operation performance under the nonlinear load and the unbalanced load, a SVM based predictive current control technique is adopted in the inner-loop current controller to improve the performance of transient response, and a outer-loop voltage controller based on the proportional integral plus resonant (PI+R) technique is used to control the amplitude and frequency of the output voltage. Simulation results demonstrate that, by using the proposed new scheme, the stand-alone wind generation system is capable to provide the excellent output voltage performance under both of the steady-state and dynamic process with the load-adaptive ability.

[1]  Liuchen Chang,et al.  An Advanced SVPWM-Based Predictive Current Controller for Three-Phase Inverters in Distributed Generation Systems , 2008, IEEE Transactions on Industrial Electronics.

[2]  W. Koczara,et al.  Synchronization and Mains Outage Detection for Controlled Grid Connection of the Wind Driven Variable Speed Power Generation System. , 2007, 2007 International Conference on Clean Electrical Power.

[3]  Paolo Mattavelli,et al.  Uninterruptible power supply multiloop control employing digital predictive voltage and current regulators , 2001 .

[4]  Jiabing Hu,et al.  Modeling and enhanced control of DFIG under unbalanced grid voltage conditions , 2009 .

[5]  Donald Grahame Holmes,et al.  Implementation of a direct digital predictive current controller for single and three phase voltage source inverters , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[6]  Wlodzimierz Koczara,et al.  Extended Direct Voltage Control of the Stand-Alone Double Fed Induction Generator , 2007, 2007 International Conference on Power Engineering, Energy and Electrical Drives.

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

[8]  Paolo Mattavelli,et al.  Uninterruptible power supply multi-loop control employing digital predictive voltage and current regulators , 2001, APEC 2001. Sixteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.01CH37181).

[9]  L. Tutelea,et al.  Novel motion sensorless control of stand alone Permanent Magnet Synchronous Generator (PMSG): harmonics and negative sequence voltage compensation under nonlinear load , 2007, 2007 European Conference on Power Electronics and Applications.

[10]  Hyun-Soo Kim,et al.  A discrete-time predictive current control for PMSM , 2003 .

[11]  F. Blaabjerg,et al.  Motion Sensorless Bidirectional PWM Converter Control with Seamless Switching from Power Grid to Stand Alone and Back , 2007, 2007 IEEE Power Electronics Specialists Conference.

[12]  F. Blaabjerg,et al.  Flexible control of small wind turbines with grid failure detection operating in stand-alone and grid-connected mode , 2004, IEEE Transactions on Power Electronics.

[13]  M. Negnevitsky,et al.  Control of a stand alone variable speed wind turbine with a permanent magnet synchronous generator , 2008, 2008 IEEE Power and Energy Society General Meeting - Conversion and Delivery of Electrical Energy in the 21st Century.

[14]  B. Singh,et al.  Stand alone wind power generating system employing permanent magnet synchronous generator , 2008, 2008 IEEE International Conference on Sustainable Energy Technologies.

[15]  B. Singh,et al.  Solid State Voltage and Frequency Controller for a Stand Alone Wind Power Generating System , 2008, IEEE Transactions on Power Electronics.