Comprehensive monitoring method for large coal-fired unit combustion system based on dynamic characteristic and static characteristic synergistic analysis

Abstract

The invention discloses a comprehensive monitoring method for a large coal-fired unit combustion system based on dynamic characteristic and static characteristic synergistic analysis of. According toan idea of system distribution, a combustion system is used as an upper integrated system, and is physically divided into various lower-level sub-devices according to system structural characteristics. For the lower-level sub-devices, dynamic information and static information of each sub-device are extracted by using slow feature analysis, and independent monitoring of each sub-device is realized. In the upper layer, process characteristics extracted from all lower-layer sub-devices are synthesized, nonlinear relations between different device variable groups are taken into account, and the dynamic and static information of the whole combustion system and the nonlinear correlations between sub-device variable groups are extracted by using kernel slow feature analysis, so that the monitoring of the overall process state of the entire combustion system is realized. Through the comprehensive monitoring method for the large coal-fired unit combustion system based on the dynamic characteristic and static characteristic synergistic analysis, the synergistic comprehensive detection of multiple devices is realized, The normal working condition switching and process faults of a system andthe sub-devices can be effectively distinguished through the extracted dynamic information and the static information, and the accuracy of the industrial large-scale system state monitoring is improved.

Description

technical field [0001] The invention belongs to the field of industrial system process monitoring, and is a state monitoring method for the combustion system of a large-scale intelligent power plant coal-fired generating set. Background technique [0002] Safe and economical operation is the main goal of thermal power unit operation. Improving the availability of thermal power units to reduce power generation costs is one of the main measures to achieve this goal. Regular preventive maintenance of thermal power units is an effective way to maintain their health. Measures can improve the availability of the unit to a certain extent. However, when the unit should be repaired, that is, what is the maintenance cycle, the manufacturer of the unit has not given a clear regulation and actually cannot give a clear regulation. Often rely on the operation department to sum up the maintenance cycle of the unit based on the long-term operation experience of the unit. Regardless of whe...

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