Wijdane El MAATAOUİ, Mustapha MABROUKİ, Soukaina El DAOUDİ, Loubna LAZRAK

Minimized Total Harmonic Distortion of a Multi-level Inverter of a Wind Power Conversion Chain Synchronized to the Grid-LCL Filter Optimization and Third Harmonic Cancellation

In order to improve the wind power conversion chain performance on the grid side, this work proposes the use of multi-level inverter and a fairly high switching frequency for an optimized LCL filter, while respecting the grid connection conditions. The method used consists of reducing the total harmonic distortion and adjusting filter parameters to cancel the third order harmonic. For grid-side chain control, two cascaded current and voltage control loops are used to generate the inverter pulse width modulation. To ensure synchronization even in the presence of grid faults or unbalance, a phase-locked loop (PLL) circuit with a multi-variable band-pass filter (MVBPF) is adopted. To validate the theoretical study, simulations are performed for a 300 W chain with a two-level, three-level, and five-level inverter using three different filters. A comparative study of the results shows that the use of the five-level inverter with the optimized filter effectively reduces ripples while meeting grid coupling conditions.

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1. Organisation for Economic Co-Operation and Development (OECD). World Energy Outlook 2015. Paris, France: OECD/International Energy Agency (IEA), 2015.

2. D. Feldman et al., Photovoltaic System Pricing Trends: Historical, Recent, and Near-Term Projections (2015 Edition). CO, USA: National Renewable Energy Laboratory (NREL), 2015.

3. B. Aboagye, S. Gyamfi, E. AntwiOfosu, and S. Djordjevic, “Status of renewable energy resources for electricity supply in Ghana,” Sci. Afr., vol. 11, p. e00660, 2021.

4. X. Peng et al., “EALSTM-QR: Interval wind-power prediction model based on numerical weather prediction and deep learning,” Energy, vol. 220, no. 3, p. 119692, 2020.

5. J. F. Walker and N. Jenkins, Wind Energy Technology. Chichester, England: John Wiley & Sons, Inc., 1997.

6. Global Wind Energy Council (GWEC). Global Wind Reports 2021. Brussels, Belgium: GWEC, 2021.

7. C. Li, G. Tang, X. Xue, A. Saeed, and X. Hu, “Short-Term Wind Speed Interval Prediction Based on Ensemble GRU Model,” in IEEE Transactions on Sustainable Energy, vol. 11, no. 3, pp. 1370–1380, July 2020. [CrossRef]

8. O. Anaya-Lara, N. Jenkins, J. Ekanayake, P. Cartwright, and M. Hughes, Wind Energy Generation Modelling and Control. Chichester, England: John Wiley & Sons, Inc., 2011.

9. C. Hang, L. Ying, and N. Shu, “Transistor open-circuit fault diagnosis in two-level three-phase inverter based on similarity measurement,” Microelectron. Reliab., vol. 91, no. 2, pp. 291–297, 2018.

10. S. El Daoudi, L. Lazrak, and M. A. Lafkih, “Sliding mode approach applied to sensorless direct torque control of cage asynchronous motor via multi-level inverter,” Prot. Control Mod. Power Syst., vol. 5, no. 1, p. 13, 2020.

11. S. El Daoudi, L. Lazrak, N. El Ouanjli, and M. A. Lafkih, “Improved DTCSPWM strategy of induction motor by using five-level PODPWM inverter and MRASSF estimator,” Int. J. Dyn. Control, 2020.

12. A. Ibrahim and M. Z. Sujod, “Variable switching frequency hybrid PWM technique for switching loss reduction in a three-phase two-level voltage source inverter,” Measurement, vol. 151, p. 107192, 2020.

13. R. Sarker, A. Dutta, and S. Debnath, “Sudipta Debnath: FPGA-based variable modulation-indexed-SPWM generator architecture for constantoutput-voltage inverter applications,” Microprocess. Microsyst., vol. 77, 2020.

14. M. Büyük, A. Tan, M. Tümay, and K. Ç. Bayındır, “Topologies, generalized designs, passive and active damping methods of switching ripple filters for voltage source inverter: A comprehensive review,” Renew. Sustain. Energy Rev., vol. 62, pp. 46–69, 2016.

15. H. Cha and T.-K. Vu, “Comparative analysis of low-pass output filter for single-phase grid-connected photovoltaic inverter,” in 25th Ann. Appl. Power Electron. Conf. Exposition (APEC), 2010, pp. 1659–1665.

16. D. Sgrò, S. A. Souza, F. L. Tofoli, R. P. S. Leão, and A. K. R. Sombra, “An integrated design approach of LCL filters based on nonlinear inductors for grid-connected inverter applications,” Electr. Power Syst. Res., vol. 186, p. 106389, 2020.

17. F. Sevilmiş and H. Karaca, “An advanced hybrid pre-filtering/in-loop-filtering based PLL under adverse grid conditions,” Eng. Sci. Technol. An Int. J., vol. 24, no. 5, pp. 1144–1152, 2021.

18. E. M. Adžic, M. S. Adžic, and V. A. Katic, “Improved PLL for power generation systems operating under real grid conditions,” Electronics, vol. 15, no. 2, pp. 5–12, 2011.

19. Y. Yang, “Direct instantaneous power control for three-level grid-connected inverters,” Int. J. Electr. Comput. Eng. (IJECE), vol. 6, no. 3, pp. 1260–1273, 2016.

20. N. Daou and F. Khatounian, “A combined phase-locked loop technique for grid synchronization of power converters under highly distorted grid conditions,” in IEEE Int. Multidiscip. Conf. Eng. Tech. (IMCET), 2016, pp. 108–114.

21. C. Gurrola-Corral, J. Segundo, M. Esparza, and R. Cruz, “Optimal LCL-filter design method for grid-connected renewable energy sources,” Int. J. Electr. Power Energy Syst., vol. 120, no. 5, p. 105998, 2020.

22. M. Liserre, F. Blaabjerg, and S. Hansen, “Design and control of an LCL filter-based three-phase active rectifier,” IEEE Trans. Ind. Appl., vol. 41, no. 5, pp. 1282–1291, 2005.

23. J. L. Monroy-Morales, D. Campos-Gaona, M. Hernández-Ángeles, R. Peña-Alzola, and J. L. Guardado-Zavala, “An active power filter based on a three-level inverter and 3D-SVPWM for selective harmonic and reactive compensation, energies,” Energies, vol. 10, no. 3, p. 297, 2017.

24. B. Malakondareddy, S. Senthil Kumar, N. Ammasai Gounden, and I. Anand, “An adaptive PI control scheme to balance the neutral-point voltage in a solar PV fed grid connected neutral point clamped inverter,” Electr. Power Energy Syst., vol. 110, pp. 318–331, 2019.