A Study of Wind Power Inverter Operating in Grid-Connected and Stand-Alone Mode

Abstract:

Wind turbine system (WTS) is a representative distributed power generation (DG). Establishment of WTS model and control strategies is of important practical significance. One critical field is the research of inverter system. It should be operated in stand-alone (SA) or grid-connected (GC) mode. The purpose of this thesis is to establish simulation platform of WTS inverter control model in Matlab/Simulink environment, which includes two typical DG control strategies, PQ and V/f. The wind fluctuation makes inverter output power harder to follow wind turbine (WT) power. In GC mode, PQ strategy was adopted to balance inverter output power and WT generated power. In SA mode, V/f strategy was applied to keep emergency load voltage stable. The bidirectional smooth transitions between SA and GC mode were well accomplished. Simulation proves the model can survive grid failures or load shedding. The study can be used in research of DG operation control.

• Periodical: Advanced Materials Research (Volumes 953-954)
• Pages: 400-406
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.953-954.400
• Online since: June 2014
• Authors: Ying Li Zhang*, Yi Chen, Wei Hua Chen
• Keywords: Bi-Directional Transition, Grid Connected, Inverter, Stand-Alone, Wind Power Generation

References

[1] K. Ma, M. Liserre, F. Blaabjerg: Reactive Power Control Methods for Improved Reliability of Wind Power Inverters under Wind Speed Variations, Energy Conversion Conference and Exposition (ECCE), 2012 IEEE, vol., no., pp.3105-3112, 15-20 September (2012).

DOI: 10.1109/ecce.2012.6342510

[2] Remus Teodorescu, Frede Blaabjerg: Flexible Control of Small Wind Turbines With Grid Failure Detection Operating in Stand-Alone and Grid-Connected Mode. IEEE Transactions on Power Electronics, vol. 19 (5), pp.1323-1332, (2004).

DOI: 10.1109/tpel.2004.833452

[3] S. Conti, A.M. Greco, N. Messina, U: Vagliasindi. Generators Control Systems in Intentionally Islanded MV Microgrids. International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM), 2008 IEEE, vol., no., pp.399-405, 11-13 June (2008).

DOI: 10.1109/speedham.2008.4581284

[4] S. Barsali, M. Ceraolo, P. Pelacchi: Control Techniques of Dispersed Generators to Improve the Continuity of Electricity Supply, Power Engineering Society Winter Meeting, 2002 IEEE, vol. 2, no., pp.789-794, (2002).

DOI: 10.1109/pesw.2002.985115

[5] M. Arafat, S. Palle, Y. Sozer, I. Husain: Transition Control Strategy between Standalone and Grid-Connected Operation of Voltage-Source Inverters. Industry Applications, IEEE Transactions on vol. 48(5), pp.1516-1525, (2012).

DOI: 10.1109/tia.2012.2210013

[6] R. Pena, R. Cardenas, R. Blasco, G. Asher, and J. Clare: A cage induction generator using back-to-back PWM converters for variable speed grid connected wind energy system. in Proc. IECON'01 Conf, 2001 IEEE, vol. 2, p.1376–1381, (2001).

DOI: 10.1109/iecon.2001.975982

[7] Yikang He, Zaiping Pan, Power Electronics Technology, 2010. Beijing: Science Press.

[8] Z. Yao: Seemless Transfer of Single-Phase Grid-Interactive Inverters between Grid-Connected and Stand-Alone Modes. IEEE Transactions on Power Electronics, vol. 25(6), pp.1597-1603, June (2010).

DOI: 10.1109/tpel.2009.2039357

[9] J. A. Peças Lopes, C. L. Moreira, and A. G. Madureira: Defining Control Strategies for MicroGrids Islanded Operation. IEEE Transactions on Power System, vol. 21(2), pp.916-924, May (2006).

DOI: 10.1109/tpwrs.2006.873018