Power grid icing starting time calculation method based on air movement calculation

A technology of starting time and air movement, applied in the field of power transmission and distribution, it can solve the problems of a single weather system, high uncertainty, rough estimation accuracy, etc., and achieve the effect of simple calculation operation, strong practicability and high accuracy.

Active Publication Date: 2016-12-21
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology

[0003] In the existing technology, the calculation of the start time of icing mainly uses artificial experience to estimate the movement of large-scale systems on weather maps. However, this estimation method often only considers a single weather system
At the same time, due to the large scale of the weather system, the uncertainty of artificial estimation is high, the estimation accuracy is relatively rough, and the air movement process is not considered, the estimation result of the easy-to-ice point deviates greatly from the actual

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  • Power grid icing starting time calculation method based on air movement calculation
  • Power grid icing starting time calculation method based on air movement calculation
  • Power grid icing starting time calculation method based on air movement calculation

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Embodiment Construction

[0042] The method for calculating the start time of grid icing based on air movement calculation in this embodiment considers the temperature change characteristics of the front line and the influence of the edge of the subtropical high, calculates the moving speed of each front line point, and thus calculates the occurrence of icing at the predicted point time. Combine now figure 1 The specific steps of the method are described in detail with the examples as follows.

[0043] (1) Observation data acquisition

[0044] Determine the calculation start time t 0 At 20:00 on January 19, 2016, the latitude of the predicted point P is 30°N, the longitude is 110°E, and the calculation area Q including P is in the range of 10°-50°N, 70°-130°E, collect t 0 Time and previous 24 hours t -24 Inner high altitude 500hPa altitude observation data, wind speed and direction observation data, surface temperature observation data.

[0045] (2) Data grid processing

[0046] Set the grid res...

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Abstract

The invention discloses a power grid icing starting time calculation method based on air movement calculation. The method comprises the following steps of: 1, observation data obtaining; 2, data grid processing; 3, frontal line point screening; 4, secondary high barometric pressure edge point screening; 5, distance calculation; 6, cold air moving speed calculation; 7, frontal line point moving time calculation; and 8, icing time calculation. The method has the following advantages: the method fills the technical blank of lack of a power grid icing starting time calculation method based on air movement calculation at present, is applied to icing starting time prediction of all easily iced points of a power grid, and is simple in calculation operation and high in practicality. Stress conditions of frontal line points are taken into consideration, a movement equation of the frontal line points is established, the movement time is calculated, the icing starting time is calculated accordingly, and thus the accuracy is high. The power transmission line icing starting time obtained through calculation provides a scientific reference basis for disposition of deicing work during a power grid icing period in winter.

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 start time of icing of a power grid based on air motion calculation. Background technique [0002] The southward movement of cold air from the north is an important key factor leading to the icing of transmission lines, which poses a serious threat to the safety of the power grid. The time when the cold air reaches the icing-prone lines is very important for the anti-icing deployment of the power grid and the ice-melting decision-making. Therefore, it is urgent to calculate the start time of grid icing. [0003] In the prior art, the calculation of the start time of icing mainly uses artificial experience to estimate the movement of large-scale systems on weather maps. However, this estimation method usually only considers a single weather system. At the same time, due to the large scale of the weather system,...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/04G06Q50/06
CPCG06Q10/04G06Q50/06
Inventor 陆佳政冯涛徐勋建郭俊张杰李丽
Owner STATE GRID HUNAN ELECTRIC POWER
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