Common Mode Currents in DC Power Routers

Conference paper (2021)

Authors

Y. Wu DC systems, Energy conversion & Storage - EEMCS
A. Shekhar DC systems, Energy conversion & Storage - EEMCS
Aditya Shekhar DC systems, Energy conversion & Storage - EEMCS
Thiago B. Soeiro DC systems, Energy conversion & Storage - EEMCS
P. Bauer DC systems, Energy conversion & Storage - EEMCS
Research Group
DC systems, Energy conversion & Storage (EEMCS) (TU Delft)
Copyright: © 2021 Y. Wu, A. Shekhar, Thiago B. Soeiro, P. Bauer
DOI: https://doi.org/10.1109/ICDCM50975.2021.9504614
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Published Date

2021

Language

English

Reuse Rights

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

DC systems, Energy conversion & Storage

Abstract

The grid reinforcement and energy redirection needs have led to the emergence of Back-To-Back Voltage Source Converter (BTB-VSC) based dc power routers. This paper investigates the low frequency Common Mode Currents (CMCs) that arise in the system if the employed BTB-VSCs have an un-isolated ac path connected in parallel to their output ports. Simulation results are presented to show a sensitivity analysis of lower order harmonics in CMC with respect to the operating active and reactive power of the dc router, dc link voltage, link resistance, modulation method and pole capacitance. Experimental results are shared to show existance of lower order CMC in 3-wire ac link operating in parallel with the dc power router and these are mitigated using zero sequence controller.

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