Deeper integration between real-time data and predictive simulation models for operational maintenance.
Developed by the Electric Power Research Institute (EPRI), OpenDSS is a highly powerful, open-source simulation tool specifically designed for electric utility distribution systems. It is excellent for grid modernization studies, renewable energy integration (solar/wind), and storage analysis. It is completely free for both academic and commercial use. 2. MATPOWER
While you cannot get a fully featured, unrestricted commercial license of ETAP 22 for free, the software developer (Operation Technology, Inc.) provides official, safe pathways for specific users to access the software without cost. 1. The ETAP Student Edition