A Graph Oriented Approach to Analysis of Nonlinear Block Diagram

Abstract In the basic design of power boiler, precise dynamic simulation using a high-order model is required. For stable computation of stiff boiler model covering both quick and slow dynamics, a graph oriented approach to analyzing nonlinear block diagram is developed. Since this method can generate the minimum order computational model from complicated block diagrams by simple procedure, stable dynamic simulation using an implicit formula can be put to practical use. It can also produce computational models for steady state analysis and generation of linear state model in same scheme. Simulations of a one-through sliding pressure boiler using high-order model, confirm validity of this method.