Security, Trust and QoS in Next-generation Control and Communication for Large Power Systems

Hauser, C. H., Bakken, D. E., Dionysiou, I., Gjermundrød, K. H., Irava, V. S., Bose, A.

International Workshop on Complex Network and Infrastructure Protection 2006, Rome, Italy, March 2006.

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The present communication architecture supporting control of the electric power grid makes it difficult to use the wealth of data collected at high rates in substations, retarding their use in new applications for controlling the grid. A flexible, real-time data network would make it possible to use these data for many more control and protection applications, having the potential to increase the reliability of the grid and increase its operating efficiency. Example applications that could use these data include: decentralized load frequency control; closed-loop voltage control; transient and small-signal stabilization; and special protection schemes taking advantage of data gathered over a wide area. Such applications and the flexibility of the underlying communication network imply greater sharing of data between the utilities making up the grid as well as performance, availability and reliability requirements. Mechanisms for managing security, trust, timeliness and path redundancy are thus important components of communication networks to support the se control applications. This paper examines the security, trust and QoS requirements imposed by these applications and show how they are met by mechanisms included in the GridStat middleware framework that we are developing.

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