Synchronous reference frame DQ current control for single phase grid connected cascaded H bridge multilevel inverter


  • V S. Kirthika Devi Amrita Vishwa Vidyapeetham
  • S G. Srivani R V College of Engineering





Photovoltaic Module, Incremental Conductance, Boost Converter, Cascaded H Bridge Multilevel Inverter, PI Controller, MPPT, Phase Shifted Pulse Width Modulation, D-Q Synchronous Reference Frame, Total Harmonics Distortion, Efficiency.


The main focus on this paper deals with a current control technique for the inverter using a PV system for grid connected topology. The work of this paper is to evolve the PV model by tracking maximum power point using Incremental conductance algorithm by applying synchronous reference frame control method for single phase transformer less cascaded H Bridge Multilevel Inverter via boost converter system connected to 230V grid. A Phase shifted pulse width modulation technique is also projected in order to afford the pulse for voltage source inverter. The mathematical expressions for the control design for the single phase system is expressed in this paper. The analysis of the control is adopted using PI control method and is executed in synchronous rotating d-q reference frame in order to carry out the response of the best output voltage for the grid connected single phase PV system. The d-q technique is applicable only for the three phase system due to the minimum requirement of two independent phases. Hence one quadrature phase inverter is added additionally in the control method. The simulation is done using MATLAB/SIMULINK.




[1] Enrique, J.M.; Andujar, J.M.; and Bohorquez, M.A A reliable, fast and low cost maximum power point tracker for photovoltaic applications. Solar Energy, 84, 79–89, 2010.

[2] Liu, Y.H.; and Huang, J.W. A fast and low cost analog maximum power point tracking method for low power photovoltaic systems. Solar Energy, 85, 2771-2780.2011

[3] M. G. Villalva, J. R. Gazoli, and E. Ruppert F., “Modeling and circuit based Simulation of photovoltaic arrays", Power Electronics Conference, Bonito-Mato Grosso do Sui, pp. 1244-1254, Sep. 2009.

[4] Esram, T.; and Chapman, P.L. Comparison of photovoltaic array maximum power point tracking techniques. IEEE Transactions on Energy Conversion, 22, 439-449.2007

[5] Safari, A.; and Mekhilef, S. Simulation and hardware implementation of incremental conductance MPPT with direct control method using cuk converter. IEEE Transactions on Industrial Electronics, 58(4), pp- 1154-1161,2011

[6] Harini, Kancherla, and S. Syama. "Simulation and analysis of incremental conductance and Perturb and Observe MPPT with DC-DC converter topology for PV array." In Electrical, Computer and Communication Technologies (ICECCT), 2015 IEEE International Conference on, pp. 1-5. IEEE, 2015.

[7] VS Kirthika Devi and S. G. Srivani. "Performance assessment of PV energy conversion system with Buck-Boost and Cuk converter for cascaded H-Bridge inverter." In Power and Energy Systems: Towards Sustainable Energy (PESTSE), 2016 Biennial International Conference on, pp. 1-6. IEEE, 2016.

[8] Liu, F.; Duan, S.; Liu, F.; Liu, B.; and Kang, Y. A variable step size INC MPPT method for PV systems. IEEE Transactions on Industrial Electronics, 55(7), 2622-2628. (2008).

[9] Mohan, Ned, and Tore M. Undeland. Power electronics: converters, applications, and design. John Wiley & Sons, 2007.

[10] Hart, Daniel W. Power electronics. Tata McGraw-Hill Education, 2011.

[11] Umanand, L. "Power electronics essentials and applications." 1sted. New York, NY, Wiley Publishers 2009.

[12] Rolim, Lus Guilherme Barbosa, Diogo Rodrigues da CostaJr, and M.Aredes. "Analysis and software implementation of a robust synchronizing PLL circuit based on the pq theory." IEEE Transactions on Industrial Electronics 53, no.6 pp-1919-1926, 2008.

[13] Zhang, Qi, Xiang-Dong Sun, Yan-Ru Zhong, Mikihiko Matsui, and Bi-Ying Ren. "Analysis and design of a digital phase-locked loop for single-phase grid-connected power conversion systems." IEEE Transactions on Industrial Electronics 58, no. 8.pp- 3581-3592. 2011

[14] Zmood, Daniel Nahum, and Donald Grahame Holmes. "Stationary frame current regulation of PWM inverters with zero steady-state error." IEEE Transactions on power electronics 18, no. 3: 814-822. 2003

[15] Franceschini, Giovanni, Emilio Lorenzani, Carla Tassoni, and Alberto Bellini. "Synchronous reference frame grid current control for single-phase photovoltaic converters." In Industry Applications Society Annual Meeting, 2008. IAS'08. IEEE, pp. 1-7. IEEE, 2008.

[16] Wen, Bo, Dushan Boroyevich, Rolando Burgos, Paolo Mattavelli, and Zhiyu Shen. "Analysis of DQ small-signal impedance of grid-tied inverters." IEEE Transactions on Power Electronics 31, no. 1: 675-687. 2016

[17] Malinowski, Mariusz, K. Gopakumar, Jose Rodriguez, and Marcelo A. Perez. "A survey on cascaded multilevel inverters." IEEE Transactions on industrial electronics 57, no. 7: 2197-2206. 2010

[18] Tolbert, Leon M., Fang Zheng Peng, and Thomas G. Habetler. "Multilevel PWM methods at low modulation indices." IEEE Transactions on power electronics 15, no. 4 pp.719-725. 1992

[19] Carrara, Giuseppe, Simone Gardella, Mario Marchesoni, Raffaele Salutari, and Giuseppe Sciutto. "A new multilevel PWM method: A theoretical analysis." IEEE Transactions on power electronics 7, no. 3 pp-497-505. 1992

[20] Wu, Bin, and Mehdi Narimani. High-power converters and AC drives. Vol. 59. John Wiley & Sons, 2017.

[21] V S Kirthika Devi and S. G. Srivani. "Modified phase shifted PWM for cascaded H bridge multilevel inverter." In Advances in Electrical, Electronics, Information, Communication and Bio-Informatics (AEEICB), 2017 Third International Conference on, pp. 89-94. IEEE, 2017.

[22] Farhadi Kangarlu, Mohammad, Ebrahim Babaei, and Frede Blaabjerg. "An LCL-filtered single-phase multilevel inverter for grid integration of PV systems." Journal of Operation and Automation in Power Engineering 4, no. 1: 54-65. 2016

[23] González, Roberto, Jess Lopez, Pablo Sanchis, and Luis Marroyo. "Transformerless inverter for single-phase photovoltaic systems." IEEE Transactions on Power Electronics 22, no. 2: 693-697. 2007

[24] González, Roberto, Eugenio Gubía, Jesús López, and Luis Marroyo. "Transformerless single-phase multilevel-based photovoltaic inverter." IEEE Transactions on Industrial Electronics 55, no. 7: 2694-2702. 2008

[25] Remus Teodorescu, Marco Liserre and Pedro Rodrguez Grid Converters for Photovoltaic and Wind Power Systemsâ€, IEEE and John Wiley & Sons, Ltd, 2 ISBN “: 978-0-470-05751-3. 2011.

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