Revitalization of the power grid: Improvement, renovation and increase of short-circuit capacity in substations

The rapid growth in electrical energy demand, driven by industrial development, urbanization, and the large-scale integration of renewable energy sources, is placing increasing pressure on existing power grid infrastructure. Many substations currently in service were designed and built decades ago based on load levels and operational assumptions that no longer reflect present or future grid conditions. Consequently, these substations face significant challenges when accommodating repowering initiatives aimed at increasing transmission capacity, as well as higher short-circuit currents that exceed their original design limits. Aging substation infrastructure poses a critical risk to system reliability and operational safety. Legacy equipment such as circuit breakers, power transformers,…