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Title: Wide-area oscillation damping in low-inertia grids under time-varying communication delays
Authors: Alghamdi, Sultan 
Markovic, Uros 
Stanojev, Ognjen 
Schiffer, Johannes 
Hug, Gabriela 
Aristidou, Petros 
Major Field of Science: Engineering and Technology
Field Category: Electrical Engineering - Electronic Engineering - Information Engineering
Keywords: Low-inertia systems;Oscillation damping;Time-varying communication delay;Wide-area control
Issue Date: Dec-2020
Source: Electric Power Systems Research, 2020, vol.189, articl. no. 106629
Volume: 189
Journal: Electric Power Systems Research 
Abstract: Wide-Area Control (WAC) can be efficiently used for oscillation damping in power systems. However, to implement a WAC, a communication network is required to transmit signals between the generation units and the control center. In turn, this makes WAC vulnerable to time-varying communication delays that, if not appropriately considered in the control design, can destabilize the system. Moreover, with the increasing integration of renewable energy resources into the grid, usually interfaced via power electronics, power system dynamics are becoming drastically faster and making WAC more vulnerable to communication delays. In this paper, we propose a design procedure for a delay-robust wide-area oscillation damping controller for low-inertia systems. Its performance is illustrated on the well-known Kundur two-area system. The results indicate that the obtained WAC successfully improves the oscillation damping while ensuring robustness against time-varying communication delays.
ISSN: 0378-7796
DOI: 10.1016/j.epsr.2020.106629
Rights: © Elsevier
Attribution-NonCommercial-NoDerivatives 4.0 International
Type: Article
Affiliation : King Abdulaziz University 
ETH Zurich 
Brandenburg University of Technology 
Cyprus University of Technology 
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