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DY: Fachverband Dynamik und Statistische Physik

DY 12: Energy systems

DY 12.2: Talk

Monday, March 7, 2016, 15:15–15:30, H47

Cascading Failures in AC Electricity Grids — •Martin Rohden, Samyak Tamrakar, Daniel Jung, and Stefan Kettemann — Department of Physics and Earth Sciences, Jacobs University Bremen, 28759 Bremen

The severity of power grid failures is often measured by the number of affected consumers. Data from real-world power grids show that the probability to disconnect more than a certain number of consumers often decays like a power law [1]. Here we are using an oscillatory power grid model [2] to model cascading failures, induced by the failure of single transmission lines. We analyse the effect of different cascading failures by counting the number of affected consumers for both artificial regular topologies and the topology of the German power grid. We show that depending on parameter values different distributions of disconnected consumers can be found. Furthermore we analyse the effect of different cluster sizes of generators and consumers and determine the vulnerability of small and large clusters against cascading failures.

[1]: I. Dobson et al., Chaos 17, 026173 (2007)

[2]: M. Rohden et al., Chaos 24, 013123 (2014)