PSSE V34 PSS®E - Power Transmission System Planning Software PSS®E is a trusted leader in the power industry for electric transmission system analysis and planning. Used by transmission planners, operations planners, consultants, and others in over 115 countries worldwide, PSS®E is powerful, customizable, and fully-featured. With the addition of integrated node-breaker support in version 34, PSS®E continues to lead the market in advances in electric transmission modeling and simulation software. The PSS®E base package includes: Fast and robust power flow solution for network models up to 200,000 buses Lightning-fast steady-state contingency analysis, including automatic corrective actions and remedial action scheme modeling Full node-breaker support for detailed modeling of substation topology Automated PV/QV analysis with plot generation Powerful program automation and customization with full-featured Python® API Balanced and unbalanced fault analysis, contingency analysis (deterministic and probabilistic) Modern graphical user interface Comprehensive power flow and dynamics model library including emerging technologies such as advanced FACTS devices and wind turbines Code-based, user-written model building Powerful, easy-to-use integrated plot facility Graphical construction of user-defined controller models