Modelling and multivariable robust controller for a power plant

摘要

The primary intention of this paper is to apply a quantitative feedback theory (QFT) controller for boiler pressure inside the Mashhad power plant system. The importance of controlling this boiler pressure is associated from several factors such as uncertain mathematical model of boiler pressure which is caused by lack of knowledge about the dynamics of the system, pay load changes and air flow. Quantitative design of robust control systems applies as a transparent and practical controller design methodology for uncertain single-input single output and multivariable plants. Initially, modelling of the mentioned system and its disturbance are achieved experimentally. Then, a controller is designed for tracking problem and disturbance. The main steps involved in designing are template generation, disturbance, loop shaping and per-filter shaping design. For more comparisons, sliding mode control as a well-known control approach is also applied to the plant. Finally, non-linear simulation has been carried out and the two controllers are compared. Obtained results demonstrate that applying the proposed techniques successfully overcome obstacles for robust control of the power plant pressure.