Calculation method of maximum continuous icing days based on rain and rime identification

Abstract

The invention discloses a method for computing the maximum number of continuous ice-coating days based on glaze and rime identification. The method comprises the steps of screening historical data, computing an identification threshold of an ice-coating day, identifying of the ice-coating day and computing of the maximum continuous ice-coating days. The method for computing the maximum number of the continuous ice-coating days based on the glaze and rime identification has the advantages that the organization is clear, the operability is high, the practicability is strong, and the technical blank that at present, a method for computing the number of the continuous ice-coating days based on glaze or rime does not exist is filled up; the applicability range is wide, the portability is good, and a database of the number of historical maximum continuous ice-coating days of any region can be established by adopting identification rules and the computing method which are provided in the method; the obtained maximum number of the continuous ice-coating days provides an important reference basis for studying a historical ice-coating increasing rule and carrying out power grid ice-coating long-time forecasting.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution, and in particular relates to a method for calculating the maximum number of consecutive ice-covered days based on rain and rime identification. Background technique [0002] Ice disaster is one of the main threats to the safe and stable operation of the power grid. Ice disasters occur frequently in southern my country, especially in 2008, a large-scale and continuous power grid icing disaster occurred in southern my country, and the direct economic loss reached tens of billions of yuan. With the continuous development of the power grid, many UHV lines have begun to pass through icing-prone areas. Therefore, studying the law of power grid icing and building a historical icing database are the prerequisites for accurately predicting power grid icing, especially for UHV icing prediction. [0003] In the existing technology, the total number of icing days is mainly used t...

AI Technical Summary

Problems solved by technology

However, some data are seriously incomplete in the current calculation process of icing days, which affects the analysis results of icing degree

At the same time, in the process of calculating the total number of icing days, since discontinuous and short-term icing processes are included, it is impossible to distinguish whether the icing process of the power grid is one continuous icing process or multiple short-term icing processes when the total icing days are the same. The icing process of the two cases is superimposed, and the severity of the icing caused by the two situations is quite different

In addition, in the winter of the same year, both long-term continuous icing and short-term icing occurred, and the calculation of the total number of icing days increased the severity of icing, which was different from the actual icing situation

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