Controller Implementation for PV Interconnection Based Three-Phase UPS Systems Operating Under Highly Nonlinear Loads

P. Muni Sravani, D. Srilatha, M. Bala Subba Reddy


In this paper we have multi functional converters to inter connect the both the dc and ac grids to handle power quality issues of the micro-grids. Multifunctional inverters can not only interface the renewable energy resource into the utility grid, but also can compensate the harmonic and reactive current in the micro-grid as an auxiliary service. Therefore, to enhance the power quality of the micro-grid by optimal utilization of the limited and valuable capacity becomes a technical challenge. In this paper, two optimal control objectives of MFGTIs are presented based on a comprehensive power quality evaluation algorithm by means of Analytic Hierarchy Process (AHP) theory. The two proposed strategies are analyzed about the powers and voltage and currents as results, and the paper also discusses how to use them in practice for the best performance. Simulation of proposed svpwm verifies the feasibility of the proposed optimal control strategies.


P. C. Loh, D. Li, Y. K. Chai, and F. Blaabjerg, "Autonomous operation of hybrid microgrid with AC and DC subgrids," IEEE Trans. on Power Electron., vol. 28, no. 5, pp. 2214-2223, May 2013.

N. W. A. Lidula and A. D. Rajapakse, Microgrids research: A review of experimental microgrids and test systems," Renew. Sust. Energy Rev., vol. 15, no. 1, pp. 186-202, Jan. 2011.

Z. Zeng, R. Zhao, H. Yang, and S. Tang, "Policies and demonstrations of micro-grids in China: A review," Renew. Sust. Energy Rev., vol. 29, pp. 701-718, Jan. 2014.

H. Nikkhajoei and R. H. Lasseter, "Distributed generation interface to the CERTS microgrid," IEEE Trans. on Power Del., vol. 24, no. 3, pp. 1598-1608, Jul. 2009.

S. C. Tan, C. K. Lee and S. Y. Hui, "General steady-state analysis and control principle of electric springs with active and reactive power compensations," IEEE Trans. on Power Electron., vol. 28, no. 8, pp. 3958-3969, Aug. 2013.

J. He, Y. W. Li, F. Blaabjerg, and X. Wang, "Active harmonic filtering using current-controlled, grid-connected DG units with closed-loop power control," IEEE Trans. on Power Electron., vol. 29, no. 2, pp. 642-653, Feb. 2014.

J. H. R. Enslin and P. J. M. Heskes, "Harmonic interaction between a large number of distributed power inverters and the distribution network," IEEE Trans. on Power Electron., vol. 19, no. 6, pp. 1586-1593, Nov. 2004.

J. He, Y. W. Li, D. Bosnjak, and B. Harris, "Investigation and active damping of multiple resonances in a parallel-inverter-based microgrid," IEEE Trans. on Power Electron., vol. 28, no.1, pp. 234-246, Jan. 2013.

H. Xu, J. Hu and Y. He, "Operation of wind-turbine-driven DFIG systems under distorted grid voltage conditions: Analysis and experimental validations," IEEE Trans. on Power Electron., vol. 27, no. 5, pp. 2354-2366, May 2012.

J. Driesen, T. Green, T. Van Craenenbroeck, and R. Belmans, "The development of power quality markets," in Proc. IEEE PES Winter Meeting, 2002, pp. 262-267.

Full Text: PDF [Full Text]


  • There are currently no refbacks.

Copyright © 2013, All rights reserved.|

Creative Commons License
International Journal of Science Engineering and Advance Technology is licensed under a Creative Commons Attribution 3.0 Unported License.Based on a work at IJSEat , Permissions beyond the scope of this license may be available at