Transmission line fault probability assessment method based on historical fault information

Abstract

The invention discloses a transmission line fault probability assessment method based on historical fault information. According to the method, through system analysis, the line historical fault information is deeply mined, a quantitative method of the influence degree of each factor of line faults is found out, and the fault probability is integrally computed according to the quantitative method and the operation conditions of a to-be-assessed line. The transmission line fault probability is assessed by using the method, not only can a variety of variable influence factors in the line operation be comprehensively considered to ensure the accuracy of an assessment result, but also the requirements of the method for basic data can be reduced to ensure the operability of the method in practical application. According to the transmission line fault probability assessment method based on the historical fault information, the problem that conflict between the accuracy of the assessment result and the operability of an existing assessment method exists in the existing transmission line fault probability assessment method is solved, and the transmission line fault probability assessment method based on the historical fault information is worth of being popularized.

Description

technical field [0001] The invention belongs to the field of failure probability assessment of transmission lines, and in particular relates to a transmission line failure probability assessment method based on historical failure information. Background technique [0002] With the increase of the scale of the power grid, the number of transmission lines in the system also increases, so the maintenance workload of the lines in the system is also increasing. Therefore, how to properly arrange the maintenance of the transmission lines in the network according to the operation of the system It is an increasingly urgent issue in the actual production of power grids to reduce the maintenance workload of transmission lines to the greatest extent without affecting the safe operation of the system. In fact, the key to solving the above problems lies in how to effectively evaluate the current operating status of many lines in the system and accurately estimate the failure probability ...

AI Technical Summary

Problems solved by technology

[0007] Although the above calculation model is established based on the mechanism of lightning's influence on the line, the shielding rate p required in the model a , arc establishment rate η and other parameters are very difficult to obtain in the actual system

Therefore, the model is accurate, but it is difficult to apply it in practice

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