Boost Converter Based 3-phase AC-AC Active Tracking Voltage Regulator Controlled by a Robust Hybrid Control Method

Abstract

In this study, a switch-mode three-phase active tracking AC-AC voltage regulator based on the boost converter is proposed with a moderate number of active and passive elements used in the topology. A robust hybrid control, where a novel designed feedforward controller supports the closed-loop PID controller, is proposed for the control of the regulator apart from similar studies in the literature. Active tracking response of the reference output phase voltages is augmented by the proposed hybrid control method. Thus nearly close to sine-wave output phase voltages can be obtained, whether the input AC phase voltages are ideal pure sine or not. Also, the modular structure of the regulator topology enables independent control for each output phase. Thus, the supply of balanced/unbalanced wye-connected three-phase loads or independent single-phase loads with nearly close to ideal sine wave voltages can be achieved by the modularity of the regulator. Both experimental and simulation test studies are performed for the proposed regulator system. A laboratory set-up for the regulator is designed for 0-200 Vp input phase voltages (50 Hz), and 0-300 Vp output phase voltages, and 1.8 kW output power. The achieved results for both simulation and experimental tests verify the proposed switch-mode boost-type regulator’s ability to provide output phase voltages nearly close to sine wave with total harmonic distortion (THD) values under 5%.

Keywords

• AC-AC regulator
• active tracking
• boost converter
• three-phase
• THD

References

1. [1] S. Subramanian and M. K. Mishra, “Interphase AC-AC topology for voltage sag supporter,” IEEE Transactions on Power Electronics, vol. 25, no. 2, pp. 514–518, 2010.
2. [2] D. M. Lee, T. G. Habetler, R. G. Harley, T. L. Keister, and J. R. Rostron, “A voltage sag supporter utilizing a PWM-switched autotransformer,” IEEE Transactions on Power Electronics, vol. 22, no. 2, pp. 626–635, 2007.
3. [3] K. Yamamoto, Y. Tsurusaki, S. Ehira, and M. Ikeda, “Suppression of compensation voltage pulsations for voltage sag/swell compensator utilizing single-phase matrix converter,” 2015 18th International Conference on Electrical Machines and Systems, pp. 581–586, 2015.
4. [4] K. Yamamoto, S. Ehira, and M. Ikeda, “Synchronous frame control for voltage sag/swell compensator utilizing single-phase matrix converter,” IEEJ Journal of Industry Applications, vol. 6, no. 6, pp. 353–361, 2017.
5. [5] L. R. Merchan-Villalba, J. M. Lozano-Garcia, J. G. Avina-Cervantes, H. J. Estrada-Garcia, A. Pizano-Martinez, and C. A. Carreno-Meneses, “Linearly decoupled control of a dynamic voltage restorer without energy storage,” Mathematics, vol. 8, no. 10, article number: 1794, 2020.
6. [6] A. H. Soomro, A. S. Larik, M. A. Mahar, A. A. Sahito, and I. A. Sohu, “Simulation-based analysis of a dynamic voltage restorer under different voltage sags with the utilization of a PI controller,” Engineering Technology & Applied Science Research, vol. 10, no. 4, pp. 5889–5895, 2020.
7. [7] K. Mikolajuk and A. Tobola, “Piecewise signals for the iterative control of the voltage conditioner,” 2019 IEEE 20th International Conference on Computational Problems of Electrical Engineering, pp. 154–157, 2019.
8. [8] H. Hafezi, R. Faranda, and M. C. Falvo, “Single-phase dynamic voltage conditioner control under load variation,” Proceedings of 2016 17th International Conference on Harmonics and Quality of Power, pp. 563–568, 2016.

9. [9] T. Shahsavarian, Y. Cao, E. Anagnostou, and R. Kalbfleisch, “Novel modulated equivalent model of point-to-point LCC-based high voltage AC/DC/AC system for geomagnetic storm-induced unbalanced harmonic studies,” International Journal of Electrical Power & Energy Systems, vol. 122, article number: 106173, 2020.
10. [10] A. E. L. Da Costa, N. Rocha, C. B. Jacobina, and E. L. L. Fabricio, “Single-phase AC-DC-AC three-level three-leg converter with reduced switch count,” IEEE Transactions on Power Electronics, vol. 35, no. 3, pp. 2295–2307, 2020.
11. [11] B. Triyono, M. Y. Fauzan, Soedibyo, and M. Ashari, “Filter design of PWM AC chopper on soft starting application 3 phase induction motors,” 2016 1st International Seminar on Application for Technology of Information and Communication: Science and Technology for a Better Future, pp. 285–289, 2016.
12. [12] U. A. Khan, A. A. Khan, H. Cha, H. G. Kim, J. Kim, and J. W. Baek, “Dual-buck AC-AC converter with inverting and non-inverting operations,” IEEE Transactions on Power Electronics, vol. 33, no. 11, pp. 9432–9443, 2018.
13. [13] J. G. Wang and R. McMahon, “Highly reliable and efficient voltage optimizer based on direct PWM AC-AC buck converter,” IEEE Transactions on Energy Conversion, vol. 35, no. 4, pp. 1897–1906, 2020.
14. [14] A. Kumar, R. Raman, D. Sarkar, P. K. Sadhu, and A. Banerjee, “Improvement in performance of induction heating system using direct AC-AC boost converter,” 2018 2nd International Conference pn Power, Energy and Environment: Towards Smart Technology, 2018.
15. [15] H. Sarnago, O. Lucia, A. Mediano, and J. M. Burdio, “Direct AC-AC resonant boost converter for efficient domestic induction heating applications,” IEEE Transactions on Power Electronics, vol. 29, no. 3, pp. 1128–1139, 2014.
16. [16] A. A. Khan, H. Cha, and H. F. Ahmed, “High efficiency buck and boost type AC-AC converters,” 2015 17th European Conference on Power Electronics and Applications, 2015.
17. [17] A. Chakraborty, A. Chakrabarti, and P. K. Sadhu, “Analysis of a full-bridge direct AC-AC boost converter based domestic induction heater,” Revue Roumaine Des Sciences Techniques - Serie Electrotechnique Et Energetique, vol. 64, no. 3, pp. 223–228, 2019.
18. [18] H. F. Ahmed, M. S. El Moursi, H. Y. Cha, K. Al Hosani, and B. Zahawi, “A reliable single-phase bipolar buck-boost direct PWM AC-AC converter with continuous input/output currents,” IEEE Transactions on Industrial Electronics, vol. 67, no. 12, pp. 10253–10265, 2020.
19. [19] M. Zhou, Y. Sun, M. Su, X. Li, F. L. Liu, and Y. L. Liu, “A single-phase buck-boost AC-AC converter with three legs,” Journal of Electrical Engineering & Technology, vol. 13, no. 2, pp. 838–848, 2018.
20. [20] F. Yalcin, “A novel buck converter based three-phase inverter with feedforward supported closed-loop control,” Electric Power Components and Systems, vol. 48, no. 14-15, pp. 1445–1463, 2020.
21. [21] F. Himmelstoss, “Aktive netzfilter,” Austrian Patent, patent no: AT 505460 B1, filed 10 July 2007, applied 15 January 2012.