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Title: A two-stage power dispatching algorithm for system support by droop-controlled DC grids
Authors: Li, Y
Xu, Z 
Wong, KP
Lai, LL
Keywords: DC droop control
Multi-terminal VSC-HVDC (MTDC)
Power flow
System support
Issue Date: 2015
Publisher: IEEE Computer Society
Source: IEEE Power and Energy Society General Meeting, PESGM 2015, 26-30 July 2015, 7285759 How to cite?
Abstract: This paper presents a two-stage algorithm to regulate the power flow among a Multi-Terminal DC (MTDC) grid with DC voltage droop controllers to provide system support for the surrounding AC systems. At stage one, DC voltage of each terminal is calculated with the proposed analytical model to track the power demand of AC systems determined by the system operator. At stage two, power initial set points or DC droops of the droop controllers are modified according to the calculated DC voltage in the first stage. The proposed algorithm can accurately and quickly track the power demand from AC systems to provide system support under the system frequency disturbances. A four-terminal MTDC grid was modeled in the DIgSILENT/PowerFactory to demonstrate the effectiveness of the proposed algorithm.
ISBN: 9781467380409
ISSN: 1944-9925
DOI: 10.1109/PESGM.2015.7285759
Appears in Collections:Conference Paper

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