Symbolic modeling of non-linear devices for the virtual test bed

This contribution illustrates that a symbolically assisted technique can provide an efficient and rapid path for developing complex nonlinear device models for power system simulations. As an example, a phase-domain induction machine model is developed with the aid of a symbolic tool. The developed symbolic tool automatically constructs a time-domain power system component models in the resistive companion form (RCF) that is widely used in time-domain simulators. The automatic differentiation technique (ADT) is utilized within the context of a symbolic modeling language, and the tool has been implemented for the virtual test bed (VTB) simulation environment.