Our Missions
In recent years, extreme heat waves have become more frequent and intense across Europe. Underground cables and their joint, forming the backbone of urban distribution systems, are among the most stressed components during these events. The EXTRASTRONG project (Resilience Evaluation by Experimental and Theoretical Approaches in Electrical Distribution Systems with Underground Cables) was born to tackle this challenge. We investigate how heat waves affect medium‑voltage cables and joints, and we deliver practical tools for grid operators, manufacturers, and standardisation bodies.
Field Measurements
This activity, led by Istituto di Ricerca Metrologica (INRiM) in collaboration with the local Distribution System Operator IRETI SpA, lead to the installation of temperature and moisture sensors on two active lines in Torino (Italy). These sensors continuously record soil moisture, irradiance, and heat transfer under real electrical loads.
Laboratory Experience
Led by Università di Roma “La Sapienza”, we tested cables and joints subjected to thermal and electrical stress while measuring insulation properties (capacitance, tan δ) and performing high voltage withstand tests.
Simulation Activities
Thanks to IRETI SpA, we accessed a massive dataset spanning 2001–2025. This allowed us to statistically correlate heat wave occurrences with actual faults in Turin’s distribution network. The data feeds into refined mathematical models for cable ampacity and a Monte Carlo based cost benefit analysis, enabling grid operators to simulate failures and evaluate mitigation strategies economically.
