Advanced Control Algorithm for Coal Mill

Cai, Jun; Lu, Dezheng; Wang, Pingyang

doi:10.1016/s1474-6670(17)57268-7

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Coal Pulverization1

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2011

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“…In addition to the prevalent PID-type strategies implemented in plants, other control methods have been studied, for example Cao and Rees [1995], Cai et al [1999], O'Kelly [1997, Palizban et al [1995]. Rees and Fan [2003] discussed the most prevalent control strategies for the coal mills and investigated the advantages of fuel flow measurements.…”

Section: Coal Pulverizationmentioning

confidence: 99%

Improved coal grinding and fuel flow control in thermal power plants

Niemczyk

Bendtsen²

2011

IFAC Proceedings Volumes

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A novel controller for coal circulation and pulverized coal flow in a coal mill is proposed. The design is based on optimal control theory for bilinear systems with additional integral action. The states are estimated from the grinding power consumption and the amount of coal accumulated in the mill by employing a special variant of a Luenberger observer. The controller uses the rotating classifier to improve the dynamical performance of the overall system. The proposed controller is compared with a PID-type controller with available pulverized coal flow measurements under nominal conditions as well as when parameter uncertainties and noise are present. The proposed controller lowers the grinding power consumption while in most cases exhibiting superior performance in comparison with the PID controller.

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