Research on Parallel Interleaved Inverters with Discontinuous Space-Vector Modulation

Feng Yang, Xu Zhao, Cong Wang, ZhiFei Sun

China University of Mining & Technology (Beijing), Beijing, China.
Chongqing Research Institute of China Coal Technology & Engineering Group Corporation, Chongqing, China.

DOI: 10.4236/epe.2013.54B043                

Abstract

Parallel converter can significantly increase the capacity of the converter and improve the power quality of AC side, but the circulation which can lead to high switching loss and even damage the devices will easily exist in the direct parallel converters. In this paper, the average model of parallel interleaved inverters system to analyze the circulation current is shown, and the cross current is relevant to DC-bus voltage and the overlap time of zero vectors in the switching period. Based on this observation, a discontinuous space vector modulation without using zero vectors (000) is eliminate and suppress the zero-sequence current to entire system. Finally, the effectiveness of modulation strategy is verified by the simulations in this paper.

Keywords

Interleaved Inverters; Circulating Current; Discontinuous Space-vector Modulation; Zero- sequence

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Y. L. Cai, Y. Zhang and L. L. Fei, “The Analysis of Current Ripple in the AC Side of High-Frequency Rectifier Based on Interleaving Technology,” Telecom Power Technology, Vol. 28, No. 3, 2011.
[2]	B. Cougo, G. Gateau, T. Meynard, M. Bobrowska-Rafal and M. Cousineau, “PD Modulation Scheme for Three-Phase Parallel Multilevel Inverters,” IEEE Transactions on Industrial Electronics, Vol. 59, No. 2, 2012.
[3]	F. J. Liu, “Multi-level inverter technology and its applications. Beijing. China Machine Press 2007.
[4]	L. Asiminoaei, E. Aeloiza, P. N. Enjeti and Frede Blaabjerg, “Shunt Active -Power-Filter Topology Based on Parallel Interleaved Inverters,” IEEE Transactions on Industrial Electronics, Vol. 55, No. 3, 2008.
[5]	Z. H. Ye, D. S. Boroyevich, J. Y. Choi and F. C. Lee, “Control of Circulating Current in Two Parallel Three-Phase Boost Rectifiers,” IEEE Transactions on Power Electronics, Vol. 17, No. 5, 2002.
[6]	K. Xing, F. C. Lee, D. S. Borojevic, Z. H. Ye, and Sudip Mazumder, “Interleaved PWM with Discontinuous Space-Vector Modulation,” IEEE Transactions on Power Electronics, Vol. 14, No. 5, 1999.
[7]	L. A. Moran, J. W. Dixon and R. R. Wallace, “A Three-phase Active Power Filter Operating with Fixed Switching Frequency for Reactive Power and Current Harmonic Compensation,” IEEE Transactions on Industrial Electronics , Vol. 42, No. 4, 1995, pp. 402-408. doi:10.1109/41.402480
[8]	P.-W. Lee, Y.-S. Lee, D. K. W. Cheng, and X.-C. Liu, “Steady-state Analysis of an Interleaved Boost Converter with Coupled Inductors,” IEEE Transactions on Industrial Electronics, Vol. 47, No. 4, 2000, pp. 787-795. doi:10.1109/41.857959
[9]	J. M. Guerrero, L. Garcia de Vicuna, J. Matas, M. Castilla, and J. Miret, “Output Impedance Design of Parallel- Connected UPS Inverters with Wireless Load-sharing Control,” IEEE Transactions on Industrial Electronics, Vol. 52, No. 4, 2005, pp. 1126-1135. doi:10.1109/TIE.2005.851634
[10]	Y. H. Zhi, D. Boroyevich, C. Jae-Young and F. C. Lee, “Control of Circulating Current in Two Parallel Three-phase Boost Rectifiers,” IEEE Transactions on Power Electronics, Vol. 17, No. 5,2002, pp. 609-615. doi:10.1109/TPEL.2002.802170