Analysis and Control of a Modular MV-to-LV Rectifier based on a Cascaded Multilevel Converter

Hossein Iman-Eini; Shahrokh Farhangi; Mahboubeh Khakbazan-Fard; Jean-Luc Schanen

Analysis and Control of a Modular MV-to-LV Rectifier based on a Cascaded Multilevel Converter

Hossein Iman-Eini

Shahrokh Farhangi

Mahboubeh Khakbazan-Fard

Jean-Luc Schanen

Vol. 9, No. 2, pp. 133-145, Mar. 2009

10.6113/JPE.2009.9.2.133

Cascaded H-bridge rectifier

Voltage balancing

Parallel-output converters

Active load-current sharing

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Abstract

In this paper a modular high performance MV-to-LV rectifier based on a cascaded H-bridge rectifier is presented. The proposed rectifier can directly connect to the medium voltage levels and provide a low-voltage and highly-stable DC interface with the consumer applications. The input stage eliminates the necessity for heavy and bulky step-down transformers. It corrects the input power factor and maintains the voltage balance among the individual DC buses. The second stage includes the high frequency parallel-output DC/DC converters which prepares the galvanic isolation, regulates the output voltage, and attenuates the low frequency voltage ripple (2fline) generated by the first stage. The parallel-output converters can work in interleaving mode and the active load-current sharing technique is utilized to balance the load power among them. The detailed analysis for modeling and control of the proposed structure is presented. The validity and performance of the proposed topology is verified by simulation and experimental results.

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Cite this article

[IEEE Style]

H. Iman-Eini, S. Farhangi, M. Khakbazan-Fard, J. Schanen, "Analysis and Control of a Modular MV-to-LV Rectifier based on a Cascaded Multilevel Converter," Journal of Power Electronics, vol. 9, no. 2, pp. 133-145, 2009. DOI: 10.6113/JPE.2009.9.2.133.

[ACM Style]

Hossein Iman-Eini, Shahrokh Farhangi, Mahboubeh Khakbazan-Fard, and Jean-Luc Schanen. 2009. Analysis and Control of a Modular MV-to-LV Rectifier based on a Cascaded Multilevel Converter. Journal of Power Electronics, 9, 2, (2009), 133-145. DOI: 10.6113/JPE.2009.9.2.133.