Boiler-Turbine Coordinated Control Based on Improved Sliding Mode Controller
Subject Areas : electrical and computer engineeringS. Golmohammadi 1 , R. Hooshmand 2 , Mohammad عطائی 3
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Keywords: Steam power plant boiler-turbine system sliding mode control throttle steam pressure,
Abstract :
In order to participate steam power plant in power system frequency regulating, in addition to producing the base load, the boiler and turbine should be controlled coordinately. Lack of coordinated control may lead to instability, cause oscillation in producing power and boiler parameters, and reducing the reliability and creating thermodynamic tension to devices. This paper proposes a sliding mode based controller to control two main boiler-turbine parameters; i.e., the turbine revolution and superheated steam pressure of the boiler output. For this purpose, complete and exact model of the subsystems including turbo-generator, turbine and related control systems are derived and the ability of the method is shown using this comprehensive model. The proposed method is simulated on the 320 MW unit of Islam-Abad power plant in Isfahan/Iran and its performance is compared with the related real PI controllers which have been used in this unit. The simulation results show the capability of the proposed controller system in controlling local network frequency and superheated steam pressure in the presence of load variations and disturbances.
[1] M. Salehi and A. Afzalian, "Robust H∞ control design for a boiler - turbine unit," in Proc. Int. Conf. on Smart Manufacturing Application, pp. 520-525, Apr. 2008.
[2] W. G. Kim, U. C. Moon, S. C. Lee, and K. Y. Lee, "Application of dynamic matrix control to a boiler - turbine system," in Proc. IEEE Conf. on Control Application, vol. 2, pp. 1595-1600, Jun. 2005.
[3] D. M. Y. Takagi, K. Mitsumoto, H. Oguchi, A. Nakai, and S. Hino, "A new control strategy for coal fired thermal power plants," in Proc. IEEE Conf. on Control Applications, pp. 1680-1685, Toronto, Canada, Aug. 2005.
[4] Y. Wang and X Yu, "New coordinated control design for thermal power generation units," IEEE Trans. on Industrial Electronics, vol. 53, no. 1, pp. 123-130, Aug. 2010.
[5] Y. Daren and X. U. Zhiqiang, "Nonlinear coordinated control of drum boiler power unit based on feedback linearization," IEEE Trans. on Energy Conversion, vol. 20, no. 1, pp. 204-210, Mar. 2005.
[6] Z. L. Yong, "Improving performance of PID controller using artificial neural network for disturbance rejection of high pressure steam temperature control in industrial boiler," in Proc. Int. Conf. on Control, Automation and Systems, pp. 1204-1207, Oct. 2008.
[7] W. G. Kim, U. C. Moon, S. C. Lee, and K. Y. Lee, "Fuzzy - adapted recursive sliding - mode controller design for nuclear power plant control," IEEE Trans. on Nuclear Science, vol. 51, no. 1, pp. 256-266, Feb. 2004.
[8] X. J. Liu, P. Guan, and J. Z. Liu, "Power plant coordinated predictive control using neuro fuzzy model," in Proc. of the 2006 American Control Conf., vol. 1, pp. 129-133, Minneapolis, Minnesota, US, Jun. 2006.
[9] R. Cori and C. Maffezzoni, "Practical optimal control of a drum boiler power plant," Automatica, vol. 20, no. 2, pp. 163-173, Mar. 1984.
[10] A. B. Abdennour and K. Y. Lee, "A decentralized controller design for a power plant using robust local controllers and functional mapping," IEEE Trans. on Energy Conversion, vol. 11, no. 2, pp. 394-400, Jun. 1996.
[11] W. Tan, H. J. Marquez, and T. Chen, "Multivariable robust controller design for a boiler system," IEEE Trans. on Control Systems Technology, vol. 10, no. 5, pp. 735-742, Sep. 2002.
[12] H. Peng, T. Ozaki, V. H. Ozaki, and Y. Toyoda, "A nonlinear exponential ARX model - based multivariable generalized predictive control strategy for thermal power plants," IEEE Trans. on Control System Technology, vol. 10, no. 2, pp. 256-262, Mar. 2002.
[13] H. Shayeghi, H. A. Shayanfar, and A. Jalili, "Load frequency control strategies: a state - of - the - art survey for the researcher," Energy Conversion and Management, vol. 50, no. 2, pp. 344-353, Feb. 2009.
[14] J. Zhen, L. Yong, and W. X. Jie Liu, "Modeling and controller design of superheated steam temperature system based on SVM combining adaptive DMC," in Proc. of the Sixth Int. Conf. on Machine Learning and Cybernetics, vol. 1, pp. 533-538, Hong Kong, Aug. 2007.
[15] K. Kunitomi, A. Kurita, Y. Tada, S. Ihara, S. Price, W. W. Richardson, L. M. Smith, and G. Electr, "Modeling combined - cycle power plant for simulation of frequency excursions," IEEE Trans. on Power System, vol. 18, no. 2, pp. 724-729, May 2003.
[16] Z. Hu, H. Fan, Y. He, "Robust controller design for boiler system," in Proc. Int. Conf. on Intelligent Computation Technology and Automation, pp. 445-449, Oct. 2008.
[17] F. P. de Mello, "Boiler models for system dynamic performance studies," IEEE Trans. on Power Systems, vo1. 6, no. 1, pp. 66-74, Feb. 1991.
[18] IEEE Working Group on Prime Mover and Energy Supply Models for System Dynamic Performance Studies, "Dynamic models for fossil fueled steam units in power system studies," IEEE Trans. on Power Systems, vol. 6, no. 2, pp. 753-761, May 1991.
[19] نیروگاه اسلامآباد اصفهان، کتاب طراحی واحد 5، بخش ابزاردقیق، GIE ایتالیا.
[20] H. Moradi, F. Bakhtiari - Nejad, and M. Saffar - Avval, "Robust control of an industrial boiler system; a comparison between two approaches: sliding mode control & H∞ technique," Energy Conversion and Management, vol. 50, no. 2, pp. 1401-1410, Jun. 2009.
[21] M. Falahpoor, M. Ataei, and A. Kiyoumarsi, "A chattering - free sliding mode control design for uncertain chaotic systems," Chaos, Solitons, and Fractals, vol. 42, no. 3, pp. 1755-1765, Mar. 2009.
