GENERAL COMPREHENSIVE MODELS FOR SIMULATION OF EARTH CONTRIBUTED FAULTS IN SYNCHRONOUS GENERATORS USING PHASE COORDINATE THEORY

This paper presents various novel, general and comprehensive models fo r simulation of single line to ground fault (SLG), double line to grou nd fault (DLG), and three phase fault (3 phi) in synchronous generator using phase coordinate theory. Simulated synchrounous machine is conn ected to infinite busbar via short three phase transmission line, and is equipped with automatic voltage regulator (A.V.R), power system sta bilizer (P.S.S), and turbine governor sets. The effects of local load at machine's terminals, fault impedance, and stator neutral grounding impedance are also considered. In proposed models, the Fourier expansi on terms can be utilized in machine's inductance matrix. Simulation pr ogram written in C language has shown the usefulness of proposed model s.