Sensor intelligent data reconstruction method and system

Abstract

The invention relates to a sensor intelligent data reconstruction method and system, and the method comprises the steps: sequentially judging whether a data reconstruction model operation condition is met or not, judging whether a sensor state detection result is abnormal or not, inputting the real-time measurement data of a sensor with an abnormal detection result into a data reconstruction model, and obtaining a reconstruction value. The fault sensor can be rapidly and actively identified, data are automatically generated under the condition that related conditions are met, the numerical value of the fault sensor is replaced, it is guaranteed that a unit is in a safe and stable state, and time is bought for operation control operation of operators and field maintenance replacement work of maintenance personnel. The method can replace the traditional'periodic test ', and uniform and targeted maintenance is realized during planned shutdown, so that the operation and maintenance cost is reduced. The unit operation state can be automatically stabilized under the condition of sensor common-mode fault, and the safety and stability of nuclear power plant operation are improved.

Description

technical field [0001] The invention belongs to the field of data processing, and in particular relates to a sensor intelligent data reconstruction method and system. Background technique [0002] The safe and reliable operation of nuclear power units is inseparable from the complete function of the instrument and control system, and the integrity of the sensor function is the basis for the instrument and control system to monitor the nuclear power plant's operating status and trigger automatic actions. In order to improve the reliability of sensors, in the design of existing nuclear power units, three technical means are mainly adopted: "higher identification requirements", "hardware redundant configuration" and "periodic tests or condition-based maintenance during operation and maintenance": In nuclear power plants, sensors are divided into two categories: "safety level" and "non-safety level". For nuclear safety level sensors, higher quality assurance, earthquake resista...

AI Technical Summary

Problems solved by technology

[0003] Although a variety of technical means have been used to improve the reliability of nuclear power plant sensors, it is still difficult to avoid the occurrence of sensor failures (such as: sudden loss of function)

After the sensor failure, it may cause the system to mistakenly trigger automatic actions based on the wrong unit state (such as: malfunction or refusal), threatening the safety of the unit, resulting in the robustness of the unit operation is still not high, and some sensor failures still require timely intervention by personnel

[0004] And in the event of a loss of redundant / non-redundant sensor sensing data caused by a common mode failure, it will still cause a sudden loss of data sensing based on the relevant sensor

Furthermore, under the relevant working conditions, the robustness of the unit operation is insufficient, so that before the operation and maintenance personnel can effectively intervene, it will cause inappropriate control system refusal or malfunction, weakening the safety and economy of the unit

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