As of my latest knowledge (early 2026), the newest version of PSS/E (Power System Simulator for Engineering) is version 35. It is developed and maintained by Siemens PTI (now part of Siemens Digital Industries Software).

4. GPU-Accelerated Contingency Analysis

For large-scale planners (think ERCOT, MISO, or CAISO), running 10,000+ contingencies used to take hours.

Why it matters: If you try to simulate a 500 MW solar plant using synchronous machine models, your transient stability results will be wrong by an order of magnitude. Version 35 fixes this physics gap.

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