Analog Simulation of Pressure-Fired Steam Generator, Supercharger, and Control System

摘要

An analog computer simulation of the DE1040 Class pressure-fired steam generator, supercharger, combustion controls, and feedwater regulator was prepared. Information for dynamic modeling was obtained from a combination of open and closed loop experimental data and from theoretical analysis. Tests of the simulation transient response were conducted for comparison with recorded data obtained from a real system in order to establish the validity of the model. Agreement was considered satisfactory. Evaluation of four proposed variations on the basic configuration of the combustion control system was conducted. Of these variations, one in particular produced excellent results in terms of improvement of stability and transient response. This scheme employed a proportional controller, amplifying a positive error from the combustion air flow closed loop, to operate the supercharger steam turbine accelerating valve. It was recommended that this scheme be further evaluated. (Author)