Power line icing assessment method based on filtering and support vector machine

Abstract

The invention provides a power line icing assessment method based on filtering and a support vector machine, relates to the technical field of an electrical power system and is to solve the technical problem of power transmission line assessment. The method is characterized by, to begin with, detecting line tension, line inclination angle, line environment wind speed and line environment atmosphere pressure of a power transmission line in the icing assessment time period; then, carrying out Kalman filtering, median filtering and mean filtering on the detected data in sequence; calculating out environment temperature difference, icing duration time and equivalent icing thickness of the power transmission line in the icing assessment time period according to the filtering data; next, carrying out optimal hyperplane training on the environment temperature difference, icing duration time and equivalent icing thickness by utilizing the SVM to obtain line icing probability of the power transmission line; and judging line icing state according to the obtained line icing probability. The method provided in the invention is suitable for assessing the icing state of the power transmission line.

Description

technical field [0001] The invention relates to power system technology, in particular to a technology based on a filtering and support vector machine-based ice coating evaluation method for power lines. Background technique [0002] Ice and snow disasters seriously threaten the safe operation of the power system. If it is light, it will cause accidents such as insulator string ice flash trip and interphase flashover trip, etc., which can restore the power supply cycle. Accidents with a long recovery period. While ice and snow disasters brought danger to the safe operation of the power grid, they also brought inconvenience to people's lives and brought losses to the national economy. [0003] At present, researches on the mechanical characteristics of overhead lines and the stability of power grids under ice and snow weather conditions have been carried out at home and abroad. [0004] This kind of research has been carried out at home and abroad. For example, Brostrom et ...

AI Technical Summary

Problems solved by technology

[0005] However, since the icing of transmission lines is greatly affected by meteorological factors, especially the ambient temperature and relative humidity have a decisive influence on the formation of icing, the icing state of the line is not only uncertain, but also multi-factorial. The current online monitoring method for the icing state of the line has the defect of low evaluation accuracy

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