Voltage Tracking of a Single-phase Inverter in an Islanded Microgrid

Voltage source inverters (VSI's) are generally used to interface with the distributedgenerators (DG) in microgrid. The voltage quality of the network is controlled on the basis ofreference voltage tracking strategy of the VSI. In this paper, mathematical formula is derived forvoltage tracking strategy, and its validity and robustness are demonstrated for both steady-stateand transient conditions. Furthermore, the eectiveness of various controller has been analysedon the system response, and the eects of control gain parameters on the system characteristicsare studied using root locus analysis. The performance of the system is found to be eective totrack the reference grid voltage (Vg*)

Keywords:

Voltage tracking, microgrid inverter control, root locus analysis.,

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R. Bayindir, E. Hossain, E. Kabalci, and R. Perez, “A comprehensive study on microgrid technology,” International Research (IJRER), vol. 4, no. 4, pp. 1094–1107, 2014. of Renewable Energy
M. A. Hossain and M. R. Ahmed, “Present energy scenario and potentiality of wind energy in Bangladesh,” Engineering and Technology, vol. 7, no. 11, pp. 1001– 1005, 2013.
M. A. Hossain, M. Z. Hossain, and M. A. Rahman, “Perspective and challenge of tidal power in Bangladesh,” Engineering and Technology, vol. 8, no. 7, pp. 1127–1130, 2014.
T. Green and M. Prodanovic, “Control of inverter- based Research, vol. 77, no. 9, pp. 1204– 1213, 2007.
F. Katiraei, R. Iravani, N. Hatziargyriou, and A. Dimeas, “Microgrids management,” Power and Energy Magazine, IEEE, vol. 6, no. 3, pp. 54–65, 2008.
P. Villenueve, “Concerns generated by islanding [electric power generation],” Power and Energy Magazine, IEEE, vol. 2, no. 3, pp. 49–53, 2004.
T. Kawabata and S. Higashino, “Parallel operation of voltage source inverters,” Industry Applications, IEEE Transactions on, vol. 24, no. 2, pp. 281–287, 1988.
M. C. Chandorkar, D. M. Divan, and R. Adapa, “Control of parallel connected inverters in standalone Applications, IEEE Transactions on, vol. 29, no. 1, pp. 136–143, 1993. systems,” Industry
J. Lopes, C. Moreira, and A. Madureira, “Defining control strategies for microgrids islanded operation,” Power Systems, IEEE Transactions on, vol. 21, no. 2, pp. 916–924, 2006.
J. M. Guerrero, J. C. Vasquez, J. Matas, D. Vicuna, L. Garc´ıa, and M. Castilla, “Hierarchical control of droop-controlled ac and dc microgrids a general approach toward standardization,” Industrial Electronics, IEEE Transactions on, vol. 58, no. 1, pp. 158–172, 2011.
J. Schiffer, R. Ortega, A. Astolfi, J. Raisch, and T. Sezi, “Conditions for stability of droop-controlled inverter-based microgrids,” Automatica, vol. 50, no. 10, pp. 2457–2469, 2014.
S. Barsali, M. Ceraolo, P. Pelacchi, and D. Poli, “Control techniques of dispersed generators to improve the continuity of electricity supply,” in Power Engineering Society Winter Meeting, 2002. IEEE, vol. 2. IEEE, 2002, pp. 789–794.
H. R. Pota, “Droop control for islanded microgrids,” in Power and Energy Society General Meeting (PES), 2013 IEEE. IEEE, 2013, pp. 1–4.
M. Prodanovic and T. C. Green, “High-quality power generation through distributed control of a power park microgrid,” Industrial Electronics, IEEE Transactions on, vol. 53, no. 5, pp. 1471–1482, 2006.
R. Teodorescu and F. Blaabjerg, “Flexible control of small wind turbines with grid failure detection operating in stand-alone and grid-connected mode,” Power Electronics, IEEE Transactions on, vol. 19, no. 5, pp. 1323–1332, 2004.
N. Pogaku and T. Green, “Harmonic mitigation throughout a distribution system: a distributed- generator-based Generation, Transmission and Distribution, vol. 153, no. 3, pp. 350–358, 2006.
H. Camblong, A. Etxeberria, J. Ugartemendia, and O. Curea, “Gain scheduling control of an islanded microgrid voltage,” Energies, vol. 7, no. 7, pp. 4498–4518, 2014.
T. Vandoorn, B. Renders, F. De Belie, B. Meersman, and L. Van-develde, “A voltage-source inverter for microgrid applications with an inner current control loop and an outer voltage control loop,” in International Conference on Renewable Energies, and Power Quality (ICREPQ09), 2009.
A. Engler, O. Osika, M. Barnes, and N. Hatziargyriou, “DB2 evaluation of the local controller www.microgrids.eu/micro2000, 2005. strategies,”
A. Engler and N. Soultanis, “Droop control in LV- grids,” in Future Power Systems, 2005 International Conference on. IEEE, 2005, pp. 6–pp.