Virtual reference setting and its application in thermal power unit control

Abstract In thermal power units, superheater outlet temperature is a very important parameter, but because of its long delay time and large inertia, it difficult to obtain good control effect by traditional algorithm. this paper, taking supercritical once-through boiler as the research object, combined with established superheated steam object model, two-degree-of-freedom system based on VRFT designed, compared conventional tuning method, proved that virtual reference feedback (VRFT) method has many advantages, such simple design, less computation, no need select initial parameters convergence, an application-oriented direct design method.