SIMULATION OF NONLINEAR AND SWITCHING ELEMENTS FOR TRANSIENT ANALYSISBASED ON WAVE DIGITAL-FILTERS

A previous paper introduced the use of wave digital filters as a basic building block for power system simulation, particularly suitable for real-time applications. This paper stresses the simulation of non-lin ear and switching elements, emphasizing the advantages of the wave fil ters implementation. The digital structure is maintained even when non -linear components change their characteristics or power electronic de vices switch their states. As a very important byproduct, the suppress ion of numerical oscillations related to the trapezoidal rule is achie ved in a rather simple way, with no effects on simulation results.