TY - CHAP
T1 - Observer-Based Coal Mill Control Using Oxygen Measurements
AU - Andersen, Palle
AU - Bendtsen, Jan Dimon
AU - Pedersen, Tom Søndergaard
AU - Mortensen, Jan Henrik
AU - Nielsen, Rene Just
PY - 2007/12/1
Y1 - 2007/12/1
N2 - This chapter proposes an approach to coal flow estimation in pulverized coal mills, which utilizes measurements of oxygen content in the flue gas. Pulverized coal mills are typically not equipped with sensors that detect the amount of coal injected into the furnace. This makes control of the coal flow difficult, causing stability problems and limits the plant's load following capabilities. To alleviate this problem without having to rely on expensive flow measurement equipment, an observer-based approach is investigated. A Kalman filter based on measurements of combustion air flow led into the furnace, and oxygen concentration in the flue gas is designed to estimate the actual coal flow injected into the furnace. With this estimate, it becomes possible to close an inner loop around the coal mill itself, giving a better disturbance rejection capability. The approach is validated against a fairly detailed, nonlinear differential equation model of the furnace and the steam circuit using data measured at a Danish power plant.
AB - This chapter proposes an approach to coal flow estimation in pulverized coal mills, which utilizes measurements of oxygen content in the flue gas. Pulverized coal mills are typically not equipped with sensors that detect the amount of coal injected into the furnace. This makes control of the coal flow difficult, causing stability problems and limits the plant's load following capabilities. To alleviate this problem without having to rely on expensive flow measurement equipment, an observer-based approach is investigated. A Kalman filter based on measurements of combustion air flow led into the furnace, and oxygen concentration in the flue gas is designed to estimate the actual coal flow injected into the furnace. With this estimate, it becomes possible to close an inner loop around the coal mill itself, giving a better disturbance rejection capability. The approach is validated against a fairly detailed, nonlinear differential equation model of the furnace and the steam circuit using data measured at a Danish power plant.
UR - http://www.scopus.com/inward/record.url?scp=84884879838&partnerID=8YFLogxK
U2 - 10.1016/B978-008046620-0/50029-3
DO - 10.1016/B978-008046620-0/50029-3
M3 - Book chapter
AN - SCOPUS:84884879838
SN - 978-3-902661-08-1
T3 - Elsevier IFAC Publications / IFAC Proceedings series
SP - 171
EP - 176
BT - Power Plants and Power Systems Control 2006
PB - Elsevier
T2 - IFAC Symposium on Power Plants and Power Systems Control
Y2 - 25 June 2006 through 28 June 2006
ER -