Increasing interdependencies between power and ICT systems amplify the possibility of cascading failures. Resilience against such failures is an essential property of modern and sustainable power systems and networks. To assess the resilience and predict the behaviour of a system consisting of interdependent subsystems, the interconnection requires adequate modeling. This work presents an approach to model and determine the state of these so-called interconnectors in future cyber-physical energy systems with strongly coupled ICT and power systems for a resilience analysis. The approach can be used to capture the impact of various parameters on system performance upon suitable modification. An hierarchical modeling approach is developed with atomic models that demonstrate the interdependencies between a power and ICT system. The modeling approach using stochastic activity nets is applied to an exemplary redispatch process in a cyber-physical energy system. The performance of an interconnector when facing limited performance from the ICT subsystem and its subsequent impact on the power system is analysed using the models. The state of the interconnector, as well as the service level are mapped to a resilience state-space diagram. The representation of system state on the resilience state-space diagram allows interpretation of system performance and quantification of resilience metrics.

中文翻译：

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为互连的ICT和电力系统建模以进行弹性分析

电源和ICT系统之间的相互依赖性越来越大，从而加剧了级联故障的可能性。抵御此类故障的能力是现代可持续的电力系统和网络的基本属性。为了评估弹性并预测由相互依赖的子系统组成的系统的行为，互连需要适当的建模。这项工作提出了一种方法，用于在具有强耦合性的ICT和电力系统的未来网络物理能源系统中，对这些所谓的互连器的状态进行建模和确定，以进行弹性分析。该方法可用于在适当修改后捕获各种参数对系统性能的影响。使用原子模型开发了分层建模方法，该模型演示了电源和ICT系统之间的相互依赖性。使用随机活动网的建模方法被应用于电子物理能源系统中的示例性重新分配过程。使用这些模型分析了当面临ICT子​​系统的有限性能时互连器的性能及其对电力系统的后续影响。互连器的状态以及服务级别均映射到弹性状态空间图。弹性状态空间图上系统状态的表示允许系统性能的解释和弹性度量的量化。互连器的状态以及服务级别均映射到弹性状态空间图。弹性状态空间图上系统状态的表示允许系统性能的解释和弹性度量的量化。互连器的状态以及服务级别均映射到弹性状态空间图。弹性状态空间图上系统状态的表示允许系统性能的解释和弹性度量的量化。