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Analysis and control of a nonlinear boiler-turbine unit |
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| Authors: | Wen Tan Horacio J Marquez Tongwen Chen Jizhen Liu |
| Affiliation: | aDepartment of Automation, North China Electric Power University, Zhuxinzhuang, Dewai, Beijing 102206, PR China bDepartment of Electrical and Computer Engineering, University of Alberta, Edmonton, AB, Canada T6G 2V4 |
| Abstract: | A distance measure is proposed via the gap metric in this paper, and the concept is applied to a boiler-turbine unit to analyze its dynamics. It is shown that the unit shows severe nonlinearity, but the nonlinearity can be avoided by careful choice of the operating range. A single linear controller can be designed to work in such an operating range. It is also shown that the controller constraint is another source of the nonlinearity, which can be compensated using anti-windup techniques. Simulation results are given to verify the conclusions. |
| Keywords: | Boiler-turbine unit Nonlinearity measure Gap metric Anti-windup bumpless transfer techniques Controller constraints |
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