# Comparative analysis of predictive current control of VSI converters in the connection of renewable energy sources to the power grid

### Abstract

This paper analyzes the performance of the predictive current control technique in the operation of Voltage Source Inverters (VSI) used to connect renewable resources to the power grid. VSIs are commonly used to convert DC power from renewable energy sources, such as energy storage units, solar power plants and fuel cells, to AC power with constant magnitude and frequency. For this purpose, a strategy known as PWM was implemented to determine the switching sequence of the converter’s power semiconductors. In addition, the current being injected into the grid must be controlled; thus, an additional control algorithm was required to operate in conjunction with the PWM technique. The main contribution of this paper is demonstrating that predictive current control presents better characteristics than current-oriented control, the most widely used strategy. The first section analyzes conventional PWM techniques and, in the second part, current control techniques are formulated. Predictive control minimizes the future error of the current by defining the best switching state in each period. The two current control techniques present good performance. However, predictive control is preferable due to its simplicity, easy implementation, low harmonic content, as well as reduced response time.

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[2] D. G. Holmes, T. A. Lipo, B. P. McGrath and W. Y Kong, “Optimized design of stationary frame three phase AC current regulators,” IEEE Transactions on Power Electronics, vol. 24, no. 11, pp. 2417-2426, 2009.

[3] P. C. Sen, “Electric motor drives and con-trol-past, present, and future,” IEEE Trans-actions on Industrial Electronics, vol. 37, no. 6, pp. 562-575, 1990.

[4] T. M. Rowan and R. J. Kerkman, “A new synchronous current regulator and an anal-ysis of current-regulated PWM inverters,” IEEE Transactions on Industry Applica-tions, no. 4, pp. 678-690, 1986.

[5] R. Kennel and A. Linder, “Predictive control of inverter supplied electrical drives,” in Power Electronics Specialists Conference (PESC), 2000, Vol. 2, pp. 761-766.

[6] C. K. Lin, D. Y. Wu, J. W. Hu, H. C. Yu and Y. S. Lai, “Model-free predictive current control of a voltage source inverter,” in In-ternational Future Energy Electronics Con-ference (IFEEC), 2015, pp. 1-6.

[7] B. Cao and L. Chang, “Robust predictive current control for grid-connected VSIs with compensation for time-delay effect and un-certain system disturbances,” in Energy Conversion Congress and Exposition (ECCE), 2015, pp. 2698-2702.

[8] J. Rodríguez, J. Pontt, C. A. Silva, P. Cor-rea, P. Lezana, P. Cortés and U. Ammann, “Predictive current control of a voltage source inverter,” IEEE Transactions on In-dustrial Electronics, vol. 54, no. 1, 495-503, 2015.

[9] S. A. Larrinaga, M. A. R. Vidal, E. Oyarbide and J. R. T. Apraiz, “Predictive control strategy for DC/AC converters based on di-rect power control,” IEEE Transactions on Industrial Electronics, vol. 54, no. 3, pp. 1261-1271, 2007.

[10] P. Cortés, L. Vattuone and J. Rodríguez, “Predictive current control with reduction of switching frequency for three phase voltage source inverters,” in International Symposium on Industrial Electronics (ISIE), 2011, pp. 1817-1822.

[11] Y. Luo, C. Liu and F. Yu, “Predictive cur-rent control of a new three-phase voltage source inverter with phase shift compensa-tion,” IET Electric Power Applications, vol. 11, no. 5, pp. 740-748, 2017.

[12] Y. Baek, K. J. Lee and D. S. Hyun, “Im-proved predictive current control for grid connected inverter applications with pa-rameter estimation,” In Industry Applica-tions Society Annual Meeting (IAS), 2009, pp. 1-6.

[13] J. R. Fischer, S. A. González, I. Carugati, M. A. Herran, M. G. Judewicz and D. O. Carri-ca, “Robust predictive control of grid-tied converters based on direct power control,” IEEE Transactions on Power Electronics, vol 29, no. 10, pp. 5634-5643, 2014.

[14] J. M. Geldenhuys, H. du Toit Mouton, A. Rix and T. Geyer, “Model predictive current con-trol of a grid connected converter with LCL-filter,” In Control and Modeling for Power Electronics (COMPEL), 2016, pp. 1-6.

[15] A. Iqbal, H. Abu-Rub, S. M. Ahmed, P. Cortés and J. Rodríguez, “Model predictive current control of a three-level five-phase NPC VSI using simplified computational approach,” in Applied Power Electronics Conference and Exposition (APEC), 2014, pp. 2323-2330.

[16] S. Bayhan, P. Kakosimos, H. Abu-Rub and J. Rodríguez, “Model predictive control of five-level H-bridge neutral-point-clamped qZS inverter,” in Annual Conference of In-dustrial Electronics Society (IECON), 2016, pp. 5971-5976.

[17] J. Han, T. Yang, D. Peng, T. Wang and G. Yao, “Model predictive control for asymmet-rical cascaded H-Bridge multilevel grid-connected inverter with flying capacitor,” in Annual Conference of Industrial Electronics Society (IECON), 2014, pp. 1611-1616.

[18] Y. Wang, W. Cong, M. Li, N. Li, M. Cao and W. Lei, “Model predictive control of modular multilevel converter with reduced computa-tional load,” in Applied Power Electronics Conference and Exposition (APEC), 2014, pp. 1776-1779.

[19] P. Liu, Y. Wang, W. Cong and W. Lei, “Grouping-sorting-optimized model predic-tive control for modular multilevel converter with reduced computational load,” IEEE Transactions on Power Electronics, vol. 31, no.3, pp.1896-1907, 2016.

[20] G. Gandi and J. Loncarski, “Simplified implementation of optimised carrier-based PWM in three-level inverters,” Electronics Letters, vol. 50, no. 8, pp. 631-633, 2014.

[21] D. G. Holmes, “The significance of zero space vector placement for carrier-based PWM schemes,” IEEE Transactions on In-dustry Applications, vol. 32, no. 5, pp.1122-1129, 1996.

[22] S. Sanusi, Z. Ibrahim, A. Jidin, M. H. Jopri, K. A. Karim and M. N. Othman, “Implemen-tation of Space Vector Modulation for volt-age source inverter,” in International Con-ference on Electrical Machines and Systems (ICEMS), 2013 pp. 1361-1366.

[23] K. Zhou and D. Wang, “Relationship be-tween space-vector modulation and three-phase carrier-based PWM: a comprehensive analysis three-phase inverters,” IEEE transactions on industrial electronics, vol. 49, no. 1, pp. 186-196, 2002.

[24] P. A. Bezerra and M. L. Heldwein, “Genera-tion of hybrid carrier based modulation pat-terns,” In Power Electronics Conference (COBEP), 2013, pp. 183-188.

[25] C. Schauder and H. N. Mehta, “Vector analysis and control of advanced static VAR compensators” in IEE Proceedings C (Gen-eration, Transmission and Distribution), 1993, vol. 140, no. 4, pp. 299-306.

[26] M. A. Hassan, and M. A. Abido, “Dynamic performance improvement of an inverter-based grid-connected microgrid,” in Interna-tional Conference on Renewable Energy Re-search and Applications (ICRERA), 2013, pp. 522-527.

[27] S. Halász, “DC components and subharmon-ics of carrier-based PWM,” in Power Elec-tronics and Motion Control Conference (EPE/PEMC), 2012, pp. DS3c-3.

[28] F. Jenni and D. Wueest, “The optimization parameters of space vector modulation,” in Fifth European Conference on Power Elec-tronics and Applications, 1993, pp. 376-381.

[29] Q. Huang and R. Kaushik,” An improved delayed signal cancellation PLL for fast grid synchronization under distorted and unbal-anced grid condition,” IEEE Transactions on Industry Applications, 2017.

[30] T. Zhao, Q. Zong, T. Zhang and Y. Xu, “Study of photovoltaic three-phase grid-connected inverter based on the grid volt-age-oriented control,” in 11th Conference on Industrial Electronics and Applications (ICIEA), 2016, pp. 2055-2060.

*TecnoLógicas*,

*21*(41), 45-62. https://doi.org/10.22430/22565337.714

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