Method of triggering fault diagnosis through high alarm condition of superheated steam temperature
A technology for fault diagnosis and superheated steam, which is used in steam generation, components of steam boilers, steam boilers, etc.
Inactive Publication Date: 2013-12-11
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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[0003] The present invention aims at the problem that there is no real-time fault diagnosis in the current steam-water system, and proposes a fault diagnosis method triggered by the high temperature alarm state of superheated steam. The high temperature alarm state triggers and activates the expert diagnosis reasoning process, performs fault separation and identification, and finally obtains the diagnostic information of the fault type
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[0086] On the premise that the furnace and flue on the left and right sides of the boiler are close to each other, that is, the operating parameters on the corresponding sides are close to each other, through thermodynamic theory, heat transfer theory, fluid mechanics theory and combustion theory, some factors that cause the high temperature of the main steam are established. The fault model, and repeated dynamic tests of the fault model when the main steam temperature is high, the fault diagnosis method is as follows:
[0087] 1) Diagnosis reasoning control strategy for activation of main steam temperature high alarm detection state;
[0088] The upper limit of the main steam temperature is set to 579°C. When the measured main steam temperature after pretreatment is higher than 579°C, the fault diagnosis reasoning process is activated and triggered, such as figure 1 As shown, the main steam temperature high alarm fault diagnosis reasoning control strategy, the diagnosis a...
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The invention relates to a method of triggering fault diagnosis through on high alarm condition of superheated steam temperature; the method is characterized by comprising the following steps: triggering and activating fault diagnosis through the high alarm condition of main steam temperature under the condition of fully demonstrating the high alarm condition of main steam temperature and relevant failures of a steam-water system, then carrying out fault seperation and identification according to priority diagnosis fault, and finally obtaining diagnostic message of fault types. The modeling simulation analysis of a thermodynamic theory machine, history faults, expert experiences and operational states are integrated to form a knowledge system which is used for carrying out real-time fault diagnosis on a vapor-water system device and the operational conditions, thereby the diagnosis is more reasonable, and simultaneously the requirement for field personnel is reduced.
Description
technical field [0001] The invention relates to a device fault diagnosis technology, in particular to a fault diagnosis method triggered by a high superheated steam temperature alarm state. Background technique [0002] At present, there are many researches on the fault diagnosis system of power plant boiler steam-water system at home and abroad, but a large number of high-end application programs of the fault diagnosis system are based on the operation of the large-scale thermal power plant plant-level monitoring information system (SIS) platform, and the data collection comes from the real-time / historical database. These fault diagnosis systems are mainly based on various operating state parameters, combined with their historical information, considering environmental factors, using analysis and judging alarms, evaluating whether it is in a normal state, abnormal or faulty state, and displaying and recording. First of all, these systems can only be used on SIS, and the per...
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IPC IPC(8): F22B37/47
Inventor 钱虹茅大钧辛浩
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER