Method for triggering fault diagnosis at low-pressure alarming state of deaerator

Abstract

The invention relates to a method for triggering a fault diagnosis at a low-pressure alarming state of a deaerator. The method comprises the following steps: when actually-measured pressure of the deaerator is lower than a low limiting value after the pre-treatment, activating to trigger the fault diagnosis; firstly carrying out the diagnosis on an admission interrupting fault according to a fault priority; if a diagnosis result is tenable, turning to an admission interrupting diagnosis result human-computer interface for explaining that the admission interrupting fault is tenable as well as the confidence coefficient of the admission interrupting fault, reasons for causing the admission interrupting fault and operation guide information, and then finishing a whole diagnosis process; if the diagnosis result is not tenable, turning to a diagnosis for low pressure of a four-section steam extraction deaerator, a deaerator safety valve wrongly-opened diagnosis, a deaerator drain valve fully-opened diagnosis and a deaerator water-level adjusting valve failure ineffectively-opened diagnosis; and finally, carrying out a diagnosis on the valve full opening of the deaerator water-level adjusting valve. The method provided by the invention can be used for carrying out the real-time fault diagnosis on heat returning system equipment and operation conditions and the operation safety of the deaerator and a boiler water feed pump steam turbine are improved.

Description

technical field [0001] The invention relates to a fault diagnosis technology, in particular to a fault diagnosis method triggered by a low pressure alarm state of a deaerator. 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 personnel whose f...

AI Technical Summary

Problems solved by technology

First of all, these systems can only be used on SIS, and the personnel whose fault information is not directly oriented to the centralized control operators on the production site are mostly managers; again, from the nature of the design principles of these systems, it uses the principle of historical data analysis , it is only a predictive alarm function; and some SIS systems diagnose equipment failures through historical data, which are diagnostic systems for maintaining equipment, and they belong to the category of equipment management evaluation; and the reasoning of the diagnosis process is complicated, and the real-time performance of the diagnosis itself is affected by it.

To sum up, there is currently no real-time fault diagnosis system for the equipment and operating conditions of the regenerative system from the perspective of the safety of the operation of the deaerator and the boiler feed water pump and steam turbine

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