The need for automation has never been greater, and both versions 35 and 36 offer comprehensive APIs for this purpose. The native APIs—psspy, psse35, etc.—allow engineers to script repetitive tasks, customize power flow controls, and build contingency analysis directly in Python. Siemens itself offers a course specifically titled "Automating PSS®E Using Python" to teach users these skills.
: Unlike Version 34, which relied on the deprecated Python 2.7, Version 36 uses current Python 3.x standards for its 2,000+ open APIs , improving both security and productivity.
The results are tangible: a redesigned, cloud-native user interface can streamline workflows for connection studies, cutting response times by up to 50%. The Dutch network operator has already integrated 85 custom-built applications onto the platform and achieved a 30% leaner IT landscape.
Some of the key features of PSS/E 35.4 include: psse latest version
Information based on PSS/E v35.0 release notes and Siemens product documentation as of April 2026. Always refer to official Siemens documentation for the most current features and system requirements.
While no software is perfect, and the shift to term licensing has sparked debate, the technical advancements in version 35 are undeniable. From Python 3 integration to HPC-ready contingency analysis, the latest release addresses the pain points of modern power system planning.
As of late 2024 into 2025, the industry is actively discussing (and the subsequent patch 35.1 and 35.2). However, it is critical to distinguish between major feature releases and maintenance patches. The need for automation has never been greater,
┌────────────────────────────────────────────────────────┐ │ Gridscale X PSS®E Ecosystem │ ├────────────────────────────────────────────────────────┤ │ AI-Powered Automation │ Continuous SaaS Updates │ ├─────────────────────────┼──────────────────────────────┤ │ 20x-30x Compute Boost │ Browser-Based Collaboration │ └─────────────────────────┴──────────────────────────────┘
Unlike ETAP, which is often favored for industrial/distribution systems, PSS®E is the go-to for large-scale utility transmission planning. Should You Upgrade?
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. : Unlike Version 34, which relied on the deprecated Python 2
For engineers, the message is clear: begin planning your transition now. Ensure your dynamic models are compatible with the new compiler standards, familiarize yourself with the cloud-native interface and AI-assisted workflows, and develop your automation strategies using the powerful Python APIs. The power system is more dynamic and complex than ever, and the latest version of PSS/E is engineered to help you navigate it with confidence.
: The software now includes automatic model format upgrades , reducing the manual effort required when migrating legacy project data (such as older .raw or .dyr files) to the latest version [11, 22]. Pros and Cons
Power System Simulator for Engineering (PSS®E) is a high-performance simulation program used by engineers worldwide to simulate electrical power transmission networks. It is the industry standard for: Dynamic Stability Simulation (time-domain analysis) Short-Circuit Analysis Optimal Power Flow (OPF) Environmental Impact Mitigation
This article provides a comprehensive deep dive into the latest version of PSS®E, exploring its newest features, architectural shifts, and the long-term roadmap guiding transmission planning. 1. Key Features in the Latest PSS®E Releases