AN IMPROVED METHOD FOR INCORPORATING MAGNETIC SATURATION IN THE Q-D SYNCHRONOUS MACHINE MODEL

An improved technique for incorporating saturation into the q-d sris m odel (Park's model) of a synchronous machine is proposed. By choosing magnetizing flux linkage as a state variable, iterative procedures req uired by traditional methods are avoided. The saturation function is r epresented by an arctangent function which has some distinct advantage s over polynomial representations and look-up tables. In particular, t he parameters of the proposed function all have physical significance and the proposed function is defined over an infinite range of flux li nkage. The model is verified for steady-state and transient conditions using a laboratory synchronous machine - rectifier system similar to those commonly used for Naval and aerospace power generation.