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Steam Pressure Control of 1 000MW Ultra-Supercritical Coal-Fired Power Unit Based on Multi-Model Predictive Control

  • Guoliang Wang (王国良)Email author
  • Baocang Ding (丁宝苍)
  • Weiwu Yan (阎威武)
Article
  • 4 Downloads

Abstract

Ultra-supercritical (USC) coal-fired unit is more and more popular in these years for its advantages. But the control of USC unit is a difficult issue for its characteristic of nonlinearity, large dead time and coupling among inputs and outputs. In this paper, model predictive control (MPC) method based on multi-model and double layered optimization is introduced for coordinated control of USC unit running in sliding pressure mode and fixed pressure mode. Three inputs (i.e. valve opening, coal flow and feedwater flow) are employed to control three outputs (i.e. output power, main steam temperature and main steam pressure). The step responses for the dynamic matrix control (DMC) are constructed using the three inputs by the three outputs under both pressure control mode. Piecewise models are built at selected operation points. In simulation, the output power follows load demand quickly and main steam temperature can be controlled around the setpoint closely in load tracking control. The simulation results show the effectiveness of the proposed methods.

Key words

ultra-supercritical coordinated control multi-model model predictive control steam pressure control 

CLC number

TP 13 

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Copyright information

© Shanghai Jiaotong University and Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Guoliang Wang (王国良)
    • 1
    Email author
  • Baocang Ding (丁宝苍)
    • 2
  • Weiwu Yan (阎威武)
    • 3
  1. 1.School of Electronic and Electrical EngineeringShanghai University of Engineering ScienceShanghaiChina
  2. 2.School of Electronic and Information EngineeringXi’an Jiaotong UniversityXi’anChina
  3. 3.Department of AutomationShanghai Jiao Tong UniversityShanghaiChina

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