Modeling of the Coal-Fired Utility Boiler in a Thermal Power Plant Based on Macro Energy Balance

Abstract:

A modeling method of the coal-fired utility boiler for a 300MW thermal power plant based on energy balance is presented. Key work sections of the power plant are treated as lumped parameter systems and a first-order model with time delay is used to describe the dynamic characteristic of the entire system. As model validation, comparison between model simulations and the actual process data for the energy of the main steam and hot reheated steam is given. Basically, the model is found to be able to track the output power variations of the boiler under different operation conditions. Rolling parameter identification of the model may further improve the model accuracy.

• Periodical: Advanced Materials Research (Volumes 732-733)
• Pages: 29-36
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.732-733.29
• Online since: August 2013
• Authors: Tong Yu*, Jing Qi Yuan
• Keywords: Energy Balance, First-Order Model, Rolling Parameter Identification, Thermal Power Plant

References

[1] U.S. Energy Information Administration Office of Coal, Nuclear, Electric and Alternate Fuels & U.S. Department of Energy: Electric Power Annual (2010).

DOI: 10.2172/10197041

[2] S. D. King, in: Coal's weakening. World Watch, Vol. 9-10 (1999), p.9–10.

[3] Y.C. Zhao, J.Y. Zhang, J.M. Sun, X.F. Bai and C.G. Zheng, in: Mineralogy, chemical composition, and microstructure of ferrospheres in fly ashes from coal combustion, Energy & Fuels, Vol. 20 (2006), p.1490–1497.

DOI: 10.1021/ef060008f

[4] R.W. Bryers, in: Fireside slagging, fouling, and high-temperature corrosion of heat transfer surface due to impurities in steam-raising fuels, Progress in Energy and Combustion Science, Vol.22(1996), p.29–120.

DOI: 10.1016/0360-1285(95)00012-7

[5] A. Zbogar, F. Frandsen, P.A. Jensen and P. Glarborg, in: Shedding of ash deposits, Progress in Energy and Combustion Science; Vol. 35 (2009), p.31–56.

DOI: 10.1016/j.pecs.2008.07.001

[6] H.L. Wei, H.W. Wu, D.K. Zhang and D. French, in: The effect of combustion conditions on mineral matter transformation and ash deposition in a utility boiler fired with a sub-bituminous coal, Proceedings of the Combustion Institute, Vol. 30(2005), p.2981–2989.

DOI: 10.1016/j.proci.2004.08.059

[7] A. Leva, C. Maffezzoni and G. Benelli, in: Validation of drum boiler models through complete dynamic tests, Control Engineering Practice, Vol. 7(1999), p.11–26.

DOI: 10.1016/s0967-0661(98)00173-7

[8] L. Ljung: System identification, theory for the user (2nd ed.)(1999).

[9] Information on: http://www.cheresources.com/staff.shtml

[10] L. Ljung, in: Perspectives on system identification, Annual Reviews in Control, Vol. 34(2010), Issue 1, pp.1-12.