Real time simulation of power system transient behaviour

A power system consisting of generating plant and transmission lines is a high order nonlinear dynamic system. Many factors affect its ability to return to some normal operating point following a disturbance. The response of a disturbed power system ranges from fast electromagnetic transients, through electromechanical power swings, to slower modes influenced by the prime mover boiler and fuel feed systems. The authors discuss the simulation of the electromechanical transients caused by disturbances such as network faults and/or plant outages. System states must be evaluated at intervals of the order of tens of milliseconds over timescales of several seconds