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Electronics 2016, 5(3), 49; doi:10.3390/electronics5030049

Impact of Degraded Communication on Interdependent Power Systems: The Application of Grid Splitting

Reliability and Risk Engineering Laboratory, Institute of Energy Technology, Department of Mechanical and Process Engineering, ETH Zurich, Zurich 8092, Switzerland
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Academic Editors: Alfredo Vaccaro and Jin (Wei) Kocsis
Received: 4 June 2016 / Revised: 19 August 2016 / Accepted: 22 August 2016 / Published: 29 August 2016
(This article belongs to the Special Issue Smart Grid Cyber Security)
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Abstract

Communication is increasingly present for managing and controlling critical infrastructures strengthening their cyber interdependencies. In electric power systems, grid splitting is a topical communication-critical application. It amounts to separating a power system into islands in response to an impending instability, e.g., loss of generator synchronism due to a component fault, by appropriately disconnecting transmission lines and grouping synchronous generators. The successful application of grid splitting depends on the communication infrastructure to collect system-wide synchronized measurements and to relay the command to open line switches. Grid splitting may be ineffective if communication is degraded and its outcome may also depend on the system loading conditions. This paper investigates the effects of degraded communication and load variability on grid splitting. To this aim, a communication delay model is coupled with a transient electrical model and applied to the IEEE 39-Bus and the IEEE 118-Bus Test System. Case studies show that the loss of generator synchronism following a fault is mitigated by timely splitting the network into islands. On the other hand, the results show that communication delays and increased network flows can degrade the performance of grid splitting. The developed framework enables the identification of the requirements of the dedicated communication infrastructure for a successful grid-splitting procedure. View Full-Text
Keywords: smart grid; grid splitting; cyber dependency; wide area measurement system; complex networks; critical infrastructures smart grid; grid splitting; cyber dependency; wide area measurement system; complex networks; critical infrastructures
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Tian, D.-A.; Sansavini, G. Impact of Degraded Communication on Interdependent Power Systems: The Application of Grid Splitting. Electronics 2016, 5, 49.

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