NDLI: Droop voltage range design in DC micro-grids considering cable resistance

Content Provider	IEEE Xplore Digital Library
Author	Fang Chen Wei Zhang Burgos, R. Boroyevich, D.
Copyright Year	2014
Description	Author affiliation: Center for Power Electron. Syst., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA (Fang Chen; Wei Zhang; Burgos, R.; Boroyevich, D.)
Abstract	Droop control is used in dc micro-grids to share load among multiple sources but practical factors deteriorates the performance. In this paper, the impact from cable resistance and voltage regulation error is analyzed. Cable resistance introduces extra output resistance thus changes the load sharing ratio while voltage error introduces a constant current deviation. To suppress the sharing unbalance from cable resistance, larger droop voltage range is preferred, but the tightness of voltage regulation is sacrificed. The possible voltage range for droop control in a dc system is analyzed. The quantitative relation between droop voltage range and unbalance current is derived for 2-source system. The worst scenarios for 3-source and multi-source multi-load system are identified. Dc system designers can use the relation between droop voltage and current sharing error from this paper to choose proper droop voltage range and guarantee sharing error within designed range.
Starting Page	770
Ending Page	777
File Size	985598
Page Count	8
File Format	PDF
ISBN	9781479957767
DOI	10.1109/ECCE.2014.6953474
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-14
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Resistance Reactive power Accuracy Power cables Sensors Voltage control Power generation
Content Type	Text
Resource Type	Article

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