Dynamic Behavior and Stabilization of DC Microgrids With Instantaneous Constant-Power Loads

Submitted by OEST on May 10, 2015 - 5:28pm

Title	Dynamic Behavior and Stabilization of DC Microgrids With Instantaneous Constant-Power Loads
Publication Type	Journal Article
Year of Publication	2011
Authors	Kwasinski A, Onwuchekwa CN
Journal	IEEE Transactions on Power Electronics
Volume	26
Pagination	822–834
ISSN	0885-8993
Abstract	This paper explores stability issues in dc microgrids with instantaneous constant-power loads (CPLs). DC microgrids typically have distributed power architectures in which point-of-load converters behave as instantaneous CPLs to line regulating converters located upstream. Constant-power loads introduce a destabilizing effect in dc microgrids that may cause their main bus voltages to show significant oscillations or to collapse. This paper also discusses stabilization strategies to prevent these undesired behaviors from occurring. Mitigating strategies such as load shedding, addition of resistive loads, filters, or energy storage directly connected to the main bus, and control methods are investigated. Advantages and disadvantages of these methods are discussed and recommendations are made. The analysis is verified with simulations and hardware-based experiments.
URL	http://ieeexplore.ieee.org/lpdocs/epic03/wrapper.htm?arnumber=5624640
DOI	10.1109/TPEL.2010.2091285