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Journal of Zhejiang University SCIENCE A 2009 Vol.10 No.6 P.890~899

http://doi.org/10.1631/jzus.A0820294


A novel control strategy for load converter of DC isolated distribution system under unbalanced loading conditions


Author(s):  R. NOROOZIAN, M. ABEDI, G. B. GHAREHPETIAN, S. H. HOSSEINI

Affiliation(s):  Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran; more

Corresponding email(s):   noroozian@aut.ac.ir

Key Words:  Unbalanced load, Power quality, Symmetrical components, Control strategy


R. NOROOZIAN, M. ABEDI, G. B. GHAREHPETIAN, S. H. HOSSEINI. A novel control strategy for load converter of DC isolated distribution system under unbalanced loading conditions[J]. Journal of Zhejiang University Science A, 2009, 10(6): 890~899.

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author="R. NOROOZIAN, M. ABEDI, G. B. GHAREHPETIAN, S. H. HOSSEINI",
journal="Journal of Zhejiang University Science A",
volume="10",
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pages="890~899",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.A0820294"
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%T A novel control strategy for load converter of DC isolated distribution system under unbalanced loading conditions
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%A M. ABEDI
%A G. B. GHAREHPETIAN
%A S. H. HOSSEINI
%J Journal of Zhejiang University SCIENCE A
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%I Zhejiang University Press & Springer
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A1 - R. NOROOZIAN
A1 - M. ABEDI
A1 - G. B. GHAREHPETIAN
A1 - S. H. HOSSEINI
J0 - Journal of Zhejiang University Science A
VL - 10
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SP - 890
EP - 899
%@ 1673-565X
Y1 - 2009
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A0820294


Abstract: 
A novel control strategy for the load converter supplying the unbalanced AC load in a DC isolated distribution system is presented. The control algorithm results in balanced and sinusoidal load voltages under unbalanced AC loading. The unbalanced load is characterized in the d-q-0 rotating coordinate based on symmetrical sequence components. Also, the mathematical model of the load converter in both a-b-c and d-q-0 coordinates is derived by using the average large signal model. Then, two control strategies for the load converter are presented. The first one uses the conventional d-q-0 controller to ensure the voltage and current regulation. The second one is a newly proposed control strategy based on the decomposition of the voltage and current into instantaneous positive, negative, and zero sequences. These three sequences are controlled independently in their own reference frames as DC signals. The performance of the load converter using these two control strategies is compared. Simulation results show the validity and capability of the newly proposed control strategy.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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[4] Lin, B.R., Lee, Y.C., 2004. Three-phase power quality compensator under the unbalanced sources and nonlinear loads. IEEE Trans. Power Electron., 51(5):1009-1017.

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[7] Short, T., 2004. Electric Power Distribution Handbook. CRC Press, New York, USA.

[8] Thandi, G.S., Zhang, R., Xing, K., Lee, F.C., Boroyevich, D., 1999. Modeling, control and stability analysis of a PEBB based DC DPS. IEEE Trans. Power Del., 14(2):497-505.

[9] Vechiu, I., Camblong, H., Tapia, G., Dakyo, B., Curea, O., 2007. Control of four leg inverter for hybrid power system applications with unbalanced load. Energy Conv. Manag., 48(7):2119-2128.

[10] Zhang, R.S., 1998. High Performance Power Converter System for Nonlinear and Unbalanced Load/Source. PhD Thesis, Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia, USA.

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