Drawing method of electric transmission line icing-thickness growth rate distribution diagram based on number of continuous freezing rain days

A technology of ice coating thickness and transmission lines, applied in the field of power transmission and distribution, can solve the problems of limited application range of formulas and weak applicability of calculation results, etc.

Active Publication Date: 2015-11-25
STATE GRID CORP OF CHINA +2
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Problems solved by technology

In addition, the ice thickness calculation formulas used in the ice area map are mostly experimental formulas or empirical formulas. The scope of application of the formulas is limited, and the actual ice thickness growth of the power grid is seldom considered. The applicability of the calculation results is not strong.

Method used

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  • Drawing method of electric transmission line icing-thickness growth rate distribution diagram based on number of continuous freezing rain days
  • Drawing method of electric transmission line icing-thickness growth rate distribution diagram based on number of continuous freezing rain days
  • Drawing method of electric transmission line icing-thickness growth rate distribution diagram based on number of continuous freezing rain days

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Experimental program
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Embodiment 1

[0049] Taking Hunan as an example, such as figure 1 As shown, the specific implementation process of drawing the icing growth rate distribution map of Hunan power grid based on the number of consecutive rime days is as follows:

[0050] (1) Establish icing database.

[0051]Hunan's meteorological icing database was established by using the ice thickness of historical wires in Hunan, the observation records of rime phenomenon over the years (1951-2013, a total of 63 years), precipitation at meteorological stations, and wind speed data; The icing occurrence period, ice thickness, rime phenomenon observation records, daily total precipitation, continuous precipitation duration, and wind speed recorded by the icing observation posts are established as the Hunan Power Grid Icing Observation Database.

[0052] (2) Preliminarily estimate the accumulative ice thickness of each continuous rime occurrence period at each station, including meteorological observation stations and artific...

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Abstract

The invention provides a drawing method of an electric transmission line icing-thickness growth rate distribution diagram based on number of continuous freezing rain days. The method comprises the steps that 1, an icing database is established; 2, the icing-thickness is preliminarily estimated; 3, an icing-thickness optimization calibration model is established, and an icing-thickness calibration value is calculated when historical continuous freezing rain happens; 4, the icing growth rate is calculated; 5, the recurrence interval of the icing growth rate is calculated; 6, interpolation, smoothness and electric system GIS platform display are conducted on calculated results. The drawing method of the electric transmission line icing-thickness growth rate distribution diagram based on the number of the continuous freezing rain days has the advantages that the operability is strong, and the practicability is strong; the applicability is strong, the portability is good, and the icing-thickness growth rate distribution diagram of any region can be drawn; the icing-thickness growth situation of the historical icing process can be reflected scientifically and reasonably, and an important breakthrough point is provided for studying the historical icing growth rule.

Description

technical field [0001] The invention belongs to the technical field of power transmission and distribution, and in particular relates to a method for drawing a growth rate distribution map of ice coating thickness of power transmission lines based on the number of consecutive rime days. Background technique [0002] Icing of transmission lines is one of the main disasters for the safe and stable operation of large power grids. When the line is severely iced, especially when the icing of the transmission line grows rapidly in a short period of time, the risk probability of power grid accidents such as tower collapse and disconnection will be greatly increased. [0003] In the existing icing distribution map drawing technology, the ice thickness is mainly obtained by using the experimental formula or empirical formula, and then the ice thickness return period is calculated to obtain the ice thickness under different return periods, and the specified area is drawn. Spatial dis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCY02A90/10
Inventor 陆佳政冯涛张红先李波方针徐勋建
Owner STATE GRID CORP OF CHINA
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