2 results about "Minimal cut set" patented technology

This invention discloses a method for predicting GIS equipment failure risk based on minimum cut set probability propagation. The method includes acquiring GIS equipment structural information, constructing a fault tree model containing top events, intermediate events, and bottom events, and performing qualitative analysis to determine the minimum cut set corresponding to the top event. Combining historical failure information of the basic components corresponding to each bottom event, the method calculates the weighted failure rate and failure probability, and performs probability propagation based on the minimum cut set structure to obtain the occurrence probability of each minimum cut set and its risk contribution to the top event. An adaptive threshold is used to identify the dominant failure mode. Real-time operating status information of each basic component is acquired, a bottom event status deviation index is constructed, the failure probability of bottom events is dynamically corrected, and the occurrence probability of the dominant failure mode is updated to predict the real-time failure risk of the GIS equipment. This invention can integrate historical and real-time data to achieve dynamic assessment of equipment failure risk, improving prediction accuracy and operational reliability.

This invention relates to a method, system, medium, and device for quantifying successful branches in an event tree, comprising: calculating the minimum cut set of failed branches of a function header and the probability value of the failed branch; calculating the probability of a successful branch based on the probability value of the failed branch; calculating the minimum cut set of a sequence; reducing the minimum cut set of the sequence according to the minimum cut set of the failed branch to obtain a new minimum cut set; calculating the frequency of the sequence according to the new minimum cut set; and correcting the frequency of the sequence using the probability of the successful branch to obtain the target frequency of the sequence. This invention addresses the correlation between the minimum cut set of the sequence and the minimum cut set of the failed function header corresponding to the successful branch by removing the minimum cut set of the failed function header corresponding to the successful branch from the minimum cut set of the sequence, thus ensuring the accuracy of the minimum cut set of the sequence. Simultaneously, it corrects the frequency of the sequence by using the frequency of the sequence, ensuring the accuracy and reliability of the frequency and avoiding frequency overestimation.