For years, the industry clung to Python 2.7 because PSSE was slow to migrate. The latest version has fully embraced .
While Version 36 is the current active standard, it is scheduled to enter maintenance mode in 2026 with the anticipated release of PSS®E Version 37 psse latest version
: Modernizing aging infrastructure by simulating "what-if" scenarios for new transmission lines and substations. Efficiency For years, the industry clung to Python 2
Version 36.1 added example renewable dynamics data and improved setup files for Geomagnetically Induced Current (GIC) calculations, facilitating faster modeling of modern energy systems. Comparison: Version 36 vs. Previous Versions PSS®E 36 (Current) PSS®E 35 (Legacy) PSS®E 34 (Legacy) Status Actively Supported End-of-Life (No more updates) Unsupported Model Compatibility Version Independent DLLs Version-specific DLLs Version-specific DLLs Python Support Modern Python 3 APIs Python 3 Support First for Python 3 Licensing CodeMeter & Cloud CodeMeter only Dongle & CodeMeter Upgrading and Support Efficiency Version 36
Pro tip: Even within the "latest" version, Siemens releases monthly patches. Version 35.8 includes critical fixes for state estimation divergences that existed in 35.0.
: Introduced in version 36.2.0, this new add-on allows users to offload heavy simulation tasks to the cloud, which is essential for managing the "overwhelming amount of output data" generated by modern planning scenarios [11, 16].
: PSS®E continues to deepen its Python support. Recent versions offer well-documented APIs and specific tools like psse_env_manager to automate the building of user-defined models [11, 34].