Systematic modeling and symbolically assisted simulation of power systems

Large disturbance behavior of power systems often involves complex interact ions between continuous dynamics and discrete events, Such behavior can be captured in a systematic way by a model that consists of differential, swit ched algebraic and state-reset (DSAR) equations, The paper presents a pract ical object-oriented approach to implementing the DSAR model, Each componen t of a system can be modeled autonomously. Connections between components a re established by simple algebraic equations. Simulation of the model using numerically robust implicit integration requires the generation of partial derivatives. The object-oriented model structure allows this differentiati on to be achieved symbolically without sacrificing simulation speed.