Ultra-Supercritical Power Unit Steam Temperature Control Based on Model Predictive Control

Abstract:

The steam temperature control is important to Ultra-supercritical (USC) unit for safe and efficient operation under load tracking. In this paper, a model predictive control (MPC) method is introduced for reheated steam temperature control of USC unit. Two inputs (i.e. damper, spray attemperator) are employed to control two outputs (i.e. primary reheater outlet temperature and finish reheater outlet temperature). Step response models of the reheater temperature are achieved using the two inputs by two outputs model. In simulation, the reheated steam temperature can be controlled around the setpoint closely in load tracking. The simulation results show the effectiveness of the proposed methods.

• Periodical: Applied Mechanics and Materials (Volumes 291-294)
• Pages: 2240-2243
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.291-294.2240
• Online since: February 2013
• Authors: Guo Liang Wang, Wei Wu Yan, Shi He Chen, Xi Zhang, Heng Feng Tian, Yong Hu
• Keywords: Model Predictive Control (MPC), Reheated Steam Temperature Control, Ultra-Supercritical Unit

References

[1] F.P. Pan, S.H. Chen, R.M. Chen, Y.Q. Zhu: Automatic Power Plant Startup and Shutdown System(APS) Technology and Application, In Chinese, (Science Press, Beijing 2011).

[2] H.F. Tian, W.W. Yan, G.L. Wang, S.H. Chen, X. Zhang, Y. Hu, N. Li, Research and Application of Multiple Model Predictive Control In Ultra-supercritical Boiler-turbine System, ICSEE (2012), in press.

[3] S.H. Chen, X. Zhang, G.L. Wang, W.W. Yan, H.H. Shao, Application of Multivariable Model Prediction Control to Ultra-supercritical Unit, ICSEE (2012), in press.

[4] D. Flynn, Thermal Power Plant Simulation and Control, (The Institution of Electrical Engineers, London, 2003).

[5] S. J. Qin, T. A. Badgwell, Control Engineering Practice, Vol. 11 (2003), p.733.

[6] C. R. Cutler, B. L. Ramaker, in: AICHE national meeting, Houston, TX, April (1979).

[7] J. Richalet, A. Rault, J. L. Testud, J. Papon, in: Proceedings of the 4th IFAC symposium on identification and system parameter estimation, Tbilisi, (1976).

[8] J. A. Rovnak, R. Corlis: IEEE Transactions on Energy Conversion, Vol. 6 (1991), p.320.

[9] L. A. Sanchez, F. G. Arroyo, R. A. Villavicencio, in:, IFAC Control of Power Plants and Power Systems, Cancun, Mexico (1995).

[10] Z. Hua, H. Hua, J. Lu and T. Zhang, in: IEEE Congress on Evolutionary Computation, Vol. 9 (2007), p.4378.

[11] U. C. Moon and K. Y. Lee, in: IEEE Transactions on Energy Conversion, Vol. 24 (2009), p.423.

[12] U. Moon and W. Kim, in: Journal of Electrical Engineering & Technology, Vol. 6 (2011), p.423.

[13] Information on http: /www. tsinghuatec. com.