Resilience Quantification and Mitigation Cost Analysis for Sector‐Coupled Distribution Grids under Climate Change Impacts

ABSTRACT Climate change intensifies extreme weather events, creating major challenges for energy distribution systems. This paper presents a method to quantify resilience in sector‐coupled energy systems by weighting sectors via operating costs and aggregating results from multiple disruption severities into a single resilience index. A complementary cost assessment framework is introduced to evaluate the economic viability of mitigation strategies. To demonstrate its practical application, the approach is tested with data from a German distribution operator, focusing on heavy rainfall events as a representative case. Scenario intensities with different return periods are simulated and aggregated probabilistically, assessing impacts on an urban medium‐voltage grid with mitigation options including vehicle‐to‐grid, gas‐to‐power, and substation hardening. Results indicate that while conventional hardening is most effective in cost minimization, vehicle‐to‐grid significantly enhances resilience by mitigating initial disruptions. The framework provides actionable guidance for operators and policymakers, supporting investment decisions and advancing sector‐coupling strategies for climate‐resilient energy systems.