Developed by Siemens PTI , PSS®E is often described by engineers as a "virtual lab" or a "crystal ball" for the electrical grid. It is one of the most widely used simulation tools in the industry, relied upon by utilities, consultants, and transmission system operators worldwide. What Exactly Does PSS®E Do?

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PSSE (pronounced "P-S-S-E" or often "Pissy") stands for . At its core, it is a high-performance, integrated software package used to simulate the steady-state and dynamic behavior of electrical power networks.