Anomaly detection method for marine nuclear power based on logical distance to characterize safe operation domain

Abstract

The invention belongs to the technical field of nuclear power system anomaly detection, and discloses a method for detecting marine nuclear power anomalies based on logical distances to characterize the safe operation domain. By analyzing historical operation data of nuclear power systems, data samples of typical operating conditions of the system are retrieved; construction standards The operating condition sample library selects the characteristic parameters that characterize the operating state; constructs a logical distance calculation function; conducts training and learning, simulation calculations, or inspection and verification of abnormal data samples collected through historical operating data to determine the logical distance threshold for judging system abnormalities, that is, the safety zone Attribution threshold, online detection of system anomalies or retrieval of anomalies in historical system operating data. The invention constructs an abnormality detection model directly from the operating state data of the target nuclear power plant, which is close to the actual system, and has stronger pertinence and applicability than other algorithms from the perspective of mechanism, and has the advantages of strong interpretability, detection strength and adjustment.

Description

technical field [0001] The invention belongs to the technical field of nuclear power system anomaly detection, and in particular relates to a marine nuclear power anomaly detection method based on a logical distance to represent a safe operation domain. Background technique [0002] At present, the automatic detection technology of the abnormal state of the nuclear power system is the front-end entry program module of the system fault diagnosis technology, and it is also the servo technology module to assist the operator on duty. The existing domestic and foreign research on abnormal detection and fault diagnosis technology of nuclear power system can be roughly divided into two categories: mechanism analysis method and data-driven method. [0003] 1) Mechanism analysis anomaly detection method. The mechanism analysis method was developed earlier and is more popular. It is the traditional mainstream method for anomaly detection and fault diagnosis of the current nuclear pow...

AI Technical Summary

Problems solved by technology

[0012] Unlike land-based nuclear facilities, marine nuclear power systems have the characteristics of complex mission profiles, variable operating conditions, small space for ship nuclear power systems, and relatively simple safety facilities. The ability to deal with accidents is relatively weak. The reliance on the operator's experience judgment and on-the-spot disposal is also greater. These factors increase the operational safety risk of the marine nuclear power system, and also add additional mental pressure and workload to the operating personnel.

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