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Development of a three-term MPC and its application to an ultra-supercritical coal fired power plant.
- Source :
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Control Engineering Practice . Feb2024, Vol. 143, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
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Abstract
- Most MPC (Model Predictive Control) algorithms used in industries and studied in the control academia use a two-term QP (quadratic programming), where the first term is the weighted norm of the output errors, and the second term is that of the input increments. In this work, a DMC (Dynamic Matrix Control) algorithm that uses three-term QP is developed and studied, where the third term is the weighted norm of the output increments. A relationship between the three-term DMC and the two-term DMC is established; and based on that, ideal closed-loop response curves are derived. These results are useful for the tuning of the three-term DMC. Then, a method for comparing two control methods is proposed and it is shown that the three-term DMC outperforms the two-term DMC. The findings are verified using simulation studies. Finally, the three-term DMC is successfully applied to a 1030 MW ultra-supercritical coal-fired power plant. According to simulation study using the identified model, in comparison to traditional two-term DMC, there is a roughly 10% reduction in the standard deviation of load tracking error for similar control efforts. In real-life tests on the power plant, the performance of the three-term DMC is compared to that of the existing PID controller. The load rate of change increased from 0.8%/min to 1.5%/min while the standard deviation of steam pressure decreased 38%; the standard deviations of the main steam temperature and reheat steam temperature decreased more than 40% with their mean values increased by more than 2 ∘ C and 4 ∘ C respectively. • A DMC (Dynamic Matrix Control) algorithm that uses three-term QP is developed and studied. • A relationship between the three-term DMC and the two-term DMC is established. • A method for comparing two control methods is proposed and it is shown that the three-term DMC outperforms the two-term DMC. • The three-term DMC is applied to a 1030 MW coal fired power plant. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09670661
- Volume :
- 143
- Database :
- Academic Search Index
- Journal :
- Control Engineering Practice
- Publication Type :
- Academic Journal
- Accession number :
- 174320432
- Full Text :
- https://doi.org/10.1016/j.conengprac.2023.105787