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		Fang FANG,Jizhen LIU,Wen TAN.[en_title][J].Control Theory and Technology,2005,3(4):415~421.[Copy]

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FangFANG,JizhenLIU,WenTAN
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Received:August 02, 2005

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Nonlinear inversion-based output tracking control of a boiler-turbine unit

Fang FANG, Jizhen LIU, Wen TAN

(College of Control Science & Technology,North China Electric Power University,Beijing 102206,China)

Abstract:

The capability to perform fast load_following has been an important issue in the power industry. An output tracking control system of a boiler_turbine unit is developed. The system is composed of stable inversion and feedback controller. The stable inversion is implemented as a feedforward controller to improve the load_following capability, and the feedback controller is utilized to guarantee the stability and robustness of the whole system. Loop_shaping H_∞ method is used to design the feedback controller and the final controller is reduced to a multivariable PI form. The output tracking control system takes account of the multivariable, nonlinear and coupling behavior of boiler_turbine system, and the simulation tests show that the control system works well and can be widely applied.

Key words: Nonlinear stable inversion Output tracking control Feedford-feedback control Boiler-turbine unit