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As of April 2026, the latest major release of Siemens PSS/E (Power System Simulator for Engineering) is Version 36, with Version 37 planned for release later this year. Major industry entities like AEMO and Hydro-Québec are currently transitioning to Version 36 to address the security risks and performance limitations of older versions. Key Improvements in Version 36
The current version focuses heavily on long-term compatibility and modernizing automation workflows:
Version Independent (VINDP) Dynamic Models: A standout feature allowing users to create dynamic Linked Library (.dll) files that will be compatible with all future PSS/E versions. This removes the historical "pain point" of having to recompile custom models for every new software release.
Built-in Model Conversion: An automated tool that upgrades existing dynamic model source code into the new version-independent format.
Python 3 Integration: 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.
Hybrid Cloud Module: Introduced in version 36.2.0, this allows for scalable on-demand computation and secure remote collaboration.
Enhanced Performance: Supports network models up to 200,000 buses with "lightning-fast" steady-state contingency analysis. Version Lifecycle Status (2026)
Siemens has established a clear support roadmap for the year: PSS®E Version 36 - Siemens
The current major release of PSS®E (Power System Simulator for Engineering) Version 36 , with the most recent minor update being . Developed by Siemens PTI
, this version represents a significant shift toward "version-independent" modeling and modern compiler support. Latest Version Highlights (PSS®E 36.x) Version Independent Models (VINDP) : A primary feature of PSS®E 36 is the ability to create dynamic linked libraries (DLLs)
that are compatible with all future versions of the software. This eliminates the need for users to recompile dynamic models whenever they upgrade. Compiler Support : Version 36.3.1 introduced support for the Intel® oneAPI Toolkit 2025.1.0 Fortran Compiler (IFX). Hybrid Cloud Module
: Introduced in version 36.2.0, this add-on allows North American customers to leverage cloud-based resources for heavy simulations. Automated Conversion
: Includes a built-in tool that automatically upgrades existing dynamic model source code into the newer, version-independent format. Enhanced Dynamics & Security
: Recent updates include example renewable dynamics data, improved GIC calculation setups, and security enhancements for Harmonics modules. Core Capabilities & Modules
remains a leader for transmission planning, offering a suite of modules for various study types: PSS E – transmission planning and analysis - Siemens
The latest primary version of Siemens PSS®E (Power System Simulator for Engineering) is Version 36, with the most current sub-release being PSS®E 36.3.1. This version represents a significant architectural shift focused on future-proofing user models and enhancing computational efficiency for modern grid planning. Key Features of PSS®E 36.x
The transition from Version 35 to 36 introduced several critical updates designed to streamline engineering workflows and support complex renewable integration:
Version-Independent Dynamic Models (VINDP): The most notable upgrade is the ability to create dynamic user-defined model (UDM) DLLs that are version-independent. This means a DLL created in Version 36 can be used in all future versions without needing to be recompiled.
Built-in Model Converter: A new tool allows for the automatic conversion of existing dynamic model source code into the new Version 36 format, significantly reducing the manual effort required during upgrades.
Advanced Compiler Support: The latest 36.3.1 update specifically adds support for the Intel® oneAPI Toolkit 2025.1.0 Fortran Compiler (IFX), ensuring compatibility with the latest high-performance computing standards.
Hybrid Cloud Integration: Version 36.2.0 introduced a new Hybrid Cloud add-on module, enabling North American customers to leverage cloud-based resources for heavy computational tasks.
Renewable Energy Enhancements: 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
Siemens has officially moved Version 35 to "end-of-life," meaning it no longer receives technical support or security updates. Major regional transmission operators, such as the Nordic TSOs, have already begun transitioning their modeling processes to Version 36 for 2025.
Users looking to upgrade can access detailed release notes through the Siemens PSS® Ideas Portal or contact Siemens PTI for subscription options. PSS E – transmission planning and analysis - Siemens
To "prepare proper paper" (typically referring to the technical documentation or installation materials) for the latest version of PSS®E (Version 36), you must focus on its new architecture, which emphasizes cross-version compatibility and modernized automation [16, 11]. Key Technical Specifications for PSS®E v36
When preparing documentation or system setups, prioritize these specific features of the latest version:
Version Independent (VINDP) DLLs: The primary breakthrough in Version 36 is the ability to create dynamic link libraries (dll) that are future-proof. Unlike previous versions, a user-defined model (UDM) created in v36 will be compatible with all future PSS®E releases without needing re-compilation [16].
Built-in Model Conversion: For existing projects, v36 includes an automated tool to upgrade older dynamic model source code into the new, standardized format [16].
Python Integration: While older versions relied heavily on specific Python distributions (like 2.7 or 3.4), newer versions require maintaining compatibility with contemporary Python environments for automation scripts and data retrieval [1, 23]. System & Hardware Requirements psse latest version
To ensure the "paper" (technical setup) is correct, the hardware must support the increased bus dimension capabilities of modern simulations:
Operating System: Current versions are optimized for Windows 10/11 environments [1, 37].
Initialization: After installation, it is standard practice to set the Startup bus dimension (e.g., to 150,000) in the "Change program settings" menu to handle large-scale system cases [9].
Path Length Limits: During the Python component installation, you must disable the path length limit in Windows to prevent errors with long file paths common in simulation projects [1]. Essential Documentation to Include
If you are preparing a project report or technical manual, ensure the following sections are addressed based on Siemens' current guidelines:
Network Data Representation: Use the .raw format for steady-state power flow data as it remains the industry standard for plain-text data management [25, 35].
Grid Compliance: Note that for projects in certain regions (like Fingrid), v36 models are becoming a strict requirement for grid compliance tests starting in 2025/2026 [11].
Model Descriptions: Clearly distinguish between Positive Sequence simulations (the focus of PSS®E) and EMT-level simulations used in software like PSCAD [34]. Helpful Resources for Practitioners
Tutorials & Guides: Highly recommended starting points include the PSSE Introduction to Dynamic Simulation for scripting and the Siemens PSSE Explore trial for students working on networks up to 50 buses [20, 23].
Training: For a "paper" focusing on skill development, resources from Power Projects India provide 100% practical simulation training [21].
PSS®E Latest Version: What’s New and Why It’s a Game-Changer for Power Systems
For decades, Siemens PTI’s PSS®E (Power System Simulator for Engineering) has been the gold standard for electrical transmission analysis. Whether you are a utility engineer, a consultant, or a researcher, staying updated on the PSS®E latest version is essential for maintaining accuracy in your simulations and compliance with evolving grid standards.
As the energy landscape shifts toward renewables and decentralized power, the latest release of PSS®E introduces critical enhancements designed to handle the complexity of the modern grid. What is the Latest Version of PSS®E?
As of the current release cycle, PSS®E 35 (specifically versions within the 35.x branch) and the rolling updates for PSS®E 36 represent the cutting edge of the software. Siemens has transitioned to a more agile update model, ensuring that bug fixes, security patches, and new model libraries are delivered more frequently than in the past. Key Features in the Newest Releases 1. Enhanced Inverter-Based Resource (IBR) Modeling
With the global push toward solar and wind, the latest version of PSS®E significantly improves how the software handles Inverter-Based Resources. Older versions often struggled with the fast dynamics of IBRs, but the latest updates include:
Advanced Generic Renewable Models (including REGCAU1, REGCBU1).
Improved stability analysis for weak grid conditions where high IBR penetration occurs. 2. Python 3 Integration
Automation is the backbone of modern engineering. The latest PSS®E version has fully embraced Python 3, moving away from the legacy Python 2.7 environments. This allows engineers to use modern libraries (like Pandas, NumPy, and Scikit-learn) for: Automated batch simulations. Advanced data visualization of contingency results. Machine learning applications in power flow prediction. 3. High-Performance Computing (HPC) & Parallel Processing
Simulating a massive interconnect can take hours. The latest version optimizes multi-core processing capabilities. By leveraging parallel dynamics simulation, PSS®E can now run multiple contingencies simultaneously, drastically reducing the "time-to-insight" for planning studies. 4. Improved User Interface (GUI)
Siemens has modernized the look and feel of the workspace. The latest GUI offers: Better high-DPI monitor support. Intuitive docking windows.
Enhanced Node-Breaker modeling visualization, allowing for a more granular view of substation configurations without leaving the main environment. Why Should You Upgrade?
If your organization is still running PSS®E 33 or early versions of 34, you are missing out on more than just "new buttons."
NERC Compliance: Many of the latest MOD and TPL standards require modeling capabilities (like specific protection scheme simulations) that are only fully supported in the latest versions.
Cloud Compatibility: The latest versions are designed to work more seamlessly in virtualized environments and cloud servers (like Azure or AWS), facilitating remote work and collaborative planning.
Node-Breaker Sophistication: The transition from traditional "bus-branch" models to "node-breaker" models is easier in the latest version, providing the level of detail required for modern operational studies. How to Check for Updates To ensure you are on the latest version:
Visit the Siemens PTI Portal: Log in to the Siemens MySTRATA or PTI software portal.
Check Version Info: In your current PSS®E software, go to Help > About to see your specific build number.
Review Release Notes: Always read the readme.pdf included with the latest installer to understand changes in the data format (saved case files) and API updates. Conclusion As of April 2026, the latest major release
The PSS®E latest version is more than an incremental update; it is a response to the "energy transition." By integrating Python 3, improving IBR modeling, and boosting computational speed, Siemens ensures that PSS®E remains the most reliable tool for keeping the lights on.
The latest major version of PSS®E (Power System Simulator for Engineering) is version 36, with the most recent sub-release being PSS®E 36.3.1 [11]. This version marks a significant shift toward modernizing the software's architecture and improving its compatibility with the latest high-performance computing environments. Quick Review of PSS®E 36 Core Enhancements
Modern Compiler Support: A major highlight of PSS®E 36.3.1 is the integration with the newer Intel® oneAPI Toolkit 2025.1.0 Fortran Compiler (IFX) [11]. This ensures that custom user models are built using the latest industry-standard tools, improving execution speed and reliability.
Version-Independent User Models: Version 36 introduced support for version-independent dynamic user model DLLs [11]. This is a massive quality-of-life improvement for engineers, as it eliminates the need to recompile custom models every time a new PSS®E version is released.
Renewable Energy Integration: The latest releases focus heavily on the "green" transition. Version 36.1 added example renewable dynamics data and updated Harmonics modules to support faster modeling of inverter-based resources (IBRs) like wind and solar [11]. Analysis & Cloud Capabilities
Hybrid Cloud Module: 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].
Advanced Linear Analysis: This module integrates the capabilities of the former PSS®MUST solution directly into the PSS®E interface, improving user-friendliness for complex contingency and sensitivity studies [14]. Developer Experience
Python Integration: 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].
Automated Upgrades: 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
Industry Standard: Widely accepted by ISOs and utilities globally [10, 24].
Steep Learning Curve: Requires proficiency in Fortran and control systems for advanced modeling [20].
Stability: Version 36.0+ offers much-needed compatibility across releases [11].
High Cost: Formal training and licensing are expensive; even short courses can cost ~$3,000 [20, 35].
Scalability: Handles large-scale systems (up to 200,000 buses) with thousands of dynamic models [25].
Complex Interface: Beginners may find the GUI and file management (IDV, RAW, DYR) overwhelming compared to modern alternatives [33, 34].
For academic users or those looking to test the software, Siemens offers PSS®E Xplore, a free trial version with full capabilities for systems up to 50 buses [23].
The latest major version of PSS®E (Power System Simulator for Engineering)
. If you are looking to prepare text-based data or scripts for this version, you should focus on its compatibility with modern programming environments and file formats. Latest Version Highlights (PSS®E 36.x) Compiler Support : Version 36.3.1 supports the newer Intel® oneAPI Toolkit 2025.1.0 Fortran Compiler (IFX) Hybrid Cloud
: Introduces a Hybrid Cloud add-on module for expanded computing power. User Models : Version 36.0 and above support version-independent dynamic user model DLLs
, meaning you don't have to recompile your custom models for every minor update. Python Integration
: It is heavily integrated with Python, allowing for automated "text preparation" through scripts rather than manual data entry. How to Prepare Text for PSS®E
"Preparing text" in the context of PSS®E usually refers to formatting raw data files ( ) or automation scripts ( PSS E – transmission planning and analysis | Siemens
The latest primary version of PSS®E (Power System Simulator for Engineering) Version 36 , released by Siemens PTI
as a major advancement in transmission planning and analysis. This version marks a significant shift in the software's architecture, specifically designed to address modern grid challenges like renewable integration and cybersecurity. Key Features of PSS®E 36
The transition to Version 36 introduces several critical improvements over previous versions like V34 and V35: Version-Independent Dynamic Models
: V36 utilizes model source code and DLLs that are version-independent. This means engineers no longer need to recompile models every time the software is updated, significantly streamlining long-term maintenance. Built-in Model Converter
: To ease the transition, V36 includes an automated converter program that updates existing dynamic models from older formats to the new V36-compatible architecture. Modernized Automation
: Unlike V34, which relied on the deprecated Python 2.7, V36 is built for modern Python™ environments ✅ Strengths (What’s Excellent)
, offering over 2,000 open APIs for intelligent automation of complex grid studies. Enhanced Renewable Support
: The software is specifically optimized for modeling advanced technologies, time-series data, and harmonic behavior to support the rapid increase in renewable energy scenarios. The Industry Transition (AEMO Case Study) Large-scale operators, such as the Australian Energy Market Operator (AEMO) , have initiated mandatory transitions to PSS®E 36.
: AEMO's transition period began in August 2025, with full industry-wide adoption expected by Drivers for Change
: The primary drivers include the end of support for V34 (October 2024) and the security risks associated with older Python versions used in previous releases. Core Capabilities & File Formats
PSS®E continues to be the "industry standard" for a wide range of analytical functions: PSS®E Version 36 - Siemens
Python 3 Integration (Major Upgrade)
V35 fully embraces Python 3 (vs. old Python 2.7 in v34). The API (psspy) is faster, more stable, and supports modern libraries (NumPy, Pandas). Automation of batch simulations is seamless.
Performance Improvements
New Renewable Energy Models
OPF Upgrades
Optimal Power Flow now includes Q/V limits for renewables, storage dispatch, and post-contingency OPF.
User Interface (GUI)
Interoperability
Steep Learning Curve (Still)
Price
Stability on Large Models
Limited Native Protection Modeling
Documentation
When engineers ask for the "PSSE latest version," they are often comparing it to alternatives like PSCAD, ETAP, or PowerWorld. Here is why the current 35.x release remains dominant:
I know what you’re thinking: "Upgrading our corporate simulation environment is a nightmare. Model conversion takes weeks."
Here is the reality check. If you are still on Version 34 or earlier, you are actively introducing risk into your planning.
1. FERC Order 2222 Compliance The latest version includes native "aggregate DER" models. As distributed energy resources (rooftop solar, batteries, EVs) bid into wholesale markets, you need to model their aggregate impact on transmission. Old versions can't handle the node count.
2. The "Weak Grid" Study In the last version, if you ran a short circuit at a bus with 90% IBR penetration, the voltage recovery profile was wildly optimistic. Version 35’s new solver correctly models the "transient over-voltage" and "sub-synchronous control interactions" (SSCI) that have caused real-world inverter trips in Texas and the UK.
3. Open Source Interoperability The latest version exports to Matpower 7.0 and IEEE Common Data Format (CDF) without data loss. If you are using GridLAB-D or OpenDSS for distribution, the co-simulation interface is finally plug-and-play.
By [Your Name/Team Name] Date: October 26, 2023 (Note: While Siemens continues to iterate, this analysis focuses on the feature set and strategic importance of the latest major release cycle, specifically Version 35, as the current industry benchmark.)
For over four decades, the PSS®E (Power System Simulator for Engineering) has been the undisputed gold standard for power system analysis. If you work in transmission planning, generation interconnection, or utility operations, you don’t just "use" PSSE—you live in it.
But the energy landscape is shifting beneath our feet. The rise of Inverter-Based Resources (IBRs), the retirement of synchronous generation, and the chaos of extreme weather events have rendered legacy modeling techniques obsolete.
In response, Siemens PTI has rolled out significant updates in the latest version cycle (V35.x). This isn't just a patch; it’s a fundamental rewrite of the simulation engine’s approach to stability, automation, and user experience.
Here is everything you need to know about the latest state of PSS®E.