Title :
Model-based leakage detection in a pulverized coal injection vessel
Author :
Johansson, Andreas ; Medvedev, Alexander
Author_Institution :
Control Eng. Group, Lulea Univ. of Technol., Sweden
Abstract :
A method for detecting and isolating incipient leakages in the valves of a pulverized coal injection vessel for a blast furnace process is presented. Nonlinear physical gray-box models of the plant are developed. Values of the unknown parameters are estimated by identification. Observers are constructed for these models and the residuals are used in a generalized likelihood ratio test. The method is successfully tested with real leakages intentionally introduced in the plant
Keywords :
fault diagnosis; furnaces; leak detection; observers; parameter estimation; pulverised fuels; statistical analysis; valves; blast furnace process; fault detection and isolation; generalized likelihood ratio test; model-based leakage detection; nonlinear physical gray-box models; pulverized coal injection vessel; residuals; valves; Blast furnaces; Electrical fault detection; Fault detection; Isolation technology; Leak detection; Nitrogen; Observers; Powders; Testing; Valves;
Conference_Titel :
American Control Conference, 1998. Proceedings of the 1998
Conference_Location :
Philadelphia, PA
Print_ISBN :
0-7803-4530-4
DOI :
10.1109/ACC.1998.707305
