Abstract
Society is critically dependent on a reliable electricity supply to maintain its functionality. Electricity supply interruptions lead to direct consequences for the electricity users and will in general have an impact on dependent infrastructures and their services. This chapter describes a quantitative analytical approach for risk analysis of electricity supply. In this approach, the consequences of failures in the electricity system are analysed in terms of electricity supply interruptions to delivery points (DPs) serving for instance societal critical functions or other infrastructures. In a cross-sector risk analysis, this approach can be used in a detailed analysis for instance as input to cascade diagrams in the risk analysis of cascading failures and interdependencies with other infrastructures.