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Multi-model online comprehensive calculation method for power transmission line wind pressure caused by tropical cyclone

A technology for power transmission lines and tropical cyclones, applied in computing, electrical digital data processing, instruments, etc., can solve problems such as low reliability

Inactive Publication Date: 2013-12-04
HARBIN INST OF TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] The purpose of the present invention is to use the multi-model online comprehensive calculation method for the wind pressure of the transmission line caused by the tropical cyclone to overcome the deficiency of the low reliability of the calculation result of a single model, so as to calculate more accurately the pressure on the overhead transmission line under the wind field of the tropical cyclone. wind pressure values ​​and identify potentially damaged transmission lines, the corresponding time window and the probability of damage to these lines

Method used

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  • Multi-model online comprehensive calculation method for power transmission line wind pressure caused by tropical cyclone
  • Multi-model online comprehensive calculation method for power transmission line wind pressure caused by tropical cyclone
  • Multi-model online comprehensive calculation method for power transmission line wind pressure caused by tropical cyclone

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Embodiment 1

[0071] A multi-model online comprehensive calculation method for wind pressure of transmission lines caused by tropical cyclones, using the tropical cyclone meteorological information regularly released by the Meteorological Center, including the latitude and longitude coordinates of the center of the tropical cyclone, the maximum wind speed V max , Grade 7 wind circle radius R 7 and 10-level wind circle radius R 10 Information, a four-layer nested iterative structure including the outermost layer, the innermost layer, the second inner layer, and the second inner layer is designed. The specific implementation process is as follows:

[0072] like figure 1 As shown, the outermost layer structure: According to the real-time information of the typhoon path released by the box [1], the box [2] judges whether to start, end or wait for the multi-model comprehensive parameter identification and transmission line wind pressure calculation function module;

[0073] Make decisions base...

Embodiment 2

[0114] Tropical Cyclone No. 11 in 2012 "Hai Kui" entered the eastern part of the East my country Sea at 17:00 on August 5 and strengthened into a severe tropical storm. It landed in Xiangshan County, Zhejiang Province at 3:00 on the 8th, with a maximum wind force of 14 class. Select the meteorological data of "Sea Anemone" in some time periods (from 22:00 on the 7th to 8:00 on the 8th) to calculate the changes in the wind pressure on the overhead transmission lines around it during its movement, and compare it with the design value of the line wind pressure Compare to identify whether the line may be damaged. The relevant meteorological data of tropical cyclone "Hai Anemone" are shown in Table 3.

[0115] Table 3 Data of Tropical Cyclone "Hai Anemone"

[0116]

[0117] The maximum wind speed radius R identified independently by a single model and comprehensively identified by multiple models max Listed in Table 4. Table 5 shows the calculation results of the weight coeff...

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Abstract

The invention provides a multi-model online comprehensive calculation method for power transmission line wind pressure caused by a tropical cyclone. According to the technical scheme, an iterative structure with four inner and outer nested layers is involved, wherein whether a power transmission line wind pressure calculation module is started or not is judged according to published real-time cyclone path information in an outermost layer; a sub-process for decomposing and iteratively calculating a migrated wind speed component and a circulated wind speed component is implemented in the second outermost layer; a sub-process for iteratively correcting the weight of each circular current component calculation model is implemented in the second innermost layer; an optimization and identification iterative sub-process for maximum wind speed radius and shape parameters is implemented in the innermost layer. According to the method, the shortcoming of low reliability of a calculation result obtained by a single model is overcome, and the reliability of the calculation result is improved; the method is used for more accurately calculating the value of wind pressure on an overhead power transmission line under a tropical cyclone wind field, and identifying the power transmission line probably to be damaged, a corresponding time window and the probability of damage to the line.

Description

technical field [0001] The invention relates to a multi-model online comprehensive calculation method for the wind pressure of a power transmission line caused by a tropical cyclone. Background technique [0002] The southeast coastal area of ​​China is one of the areas most severely affected by tropical cyclones in the world. In recent years, affected by global warming and sea level rise, the frequency and risk of typhoon disasters in this region are also increasing, causing frequent damage to power transmission and distribution equipment in the power system, and even causing large-scale power outages in the power grid. Therefore, the online assessment of the situation that tropical cyclones may cause damage to power grid equipment has important application value for monitoring and preventing the damage of tropical cyclones to power grids. [0003] However, limited by technical conditions such as the number of typhoon monitoring points and data transmission within the cove...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 姚恺丰于继来王松岩徐泰山刘强刘振亚
Owner HARBIN INST OF TECH
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