IEEE Transformers Categories

There are four (4) categories of transformers according to IEEE Std. C57.12.00 – IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers. Categories of Transformer Rating Category …

Sub-synchronous torsional interaction (SSTI)

Definition Sub-synchronous torsional interaction (SSTI) is a phenomenon in power systems where mechanical torsional oscillations of a turbine-generator shaft interact with the electrical sub-synchronous frequency components of the power system. …