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Weather forecast-based maximal current carrying capacity prediction method of overhead transmission line

A technology for overhead transmission lines and transmission lines, which is used in circuit devices, AC network circuits, electrical components, etc.

Active Publication Date: 2015-04-22
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0013] At present, the main research focus at home and abroad is how to use the formula (2) to accurately calculate the maximum current-carrying capacity of the transmission wire, and there is no report on the prediction of the maximum current-carrying capacity of the transmission wire

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  • Weather forecast-based maximal current carrying capacity prediction method of overhead transmission line
  • Weather forecast-based maximal current carrying capacity prediction method of overhead transmission line
  • Weather forecast-based maximal current carrying capacity prediction method of overhead transmission line

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Embodiment Construction

[0034] An embodiment of the method for predicting the maximum current-carrying capacity of overhead transmission lines based on weather forecasts of the present invention includes the following steps:

[0035] S1 collects the location of the transmission line and the meteorological data of the region in previous years, including ambient temperature, wind speed, wind direction and solar radiation;

[0036] It is known that the actual ambient temperature is 20.5°C, the wind speed is 2.1m / s, and the sunshine intensity is 289W / m at 3:00 pm on the m-th day of the N-th year in a place where a certain line is located. 2 ; and the ambient temperature of the weather forecast is 20.8°C, the wind speed is 2m / s, and the sunshine intensity is 300W / m 2 .

[0037] At 3 p.m. on the m-th day of the N+1 year, the actual ambient temperature is 21°C, the wind speed is 2m / s, and the sunshine intensity is 240W / m 2 ; and the ambient temperature of the weather forecast is 21°C, the wind speed is 2m...

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Abstract

The invention relates to a weather forecast-based maximal current carrying capacity prediction method of an overhead transmission line, and the method comprises following steps of S1 collecting a position where the transmission line is located and weather data of past years in the local district; S2 regression analyzing a relation between ambient temperature, wind speed, wind direction and solar radiation quantity of the position on which the transmission line is located and weather data of the local district; S3 predicting a weather condition on the position where the transmission line is located through a formula according to the weather forecast of the local district of the transmission line; and S4 substituting the predicted weather condition in step S3 in a calculation formula provided in the international standard IEE738-2006 to calculate the maximal current carrying capacity prediction value of the transmission line. Against for the problem for predicting the maximal current carrying capacity of the traditional transmission line, by establishing the associated link between the on-site weather condition and the weather forecast data, the maximal current carrying capacity of the transmission line is predicted by utilizing the weather forecast data.

Description

technical field [0001] The invention relates to a method for predicting the maximum current-carrying capacity of a power transmission line, in particular to a method for predicting the maximum current-carrying capacity of an overhead power transmission line by using previous environmental meteorological data and weather forecast environmental meteorological data. Background technique [0002] For overhead transmission lines, the allowable operating ampacity is related to ambient meteorological conditions such as ambient wind speed, wind direction, ambient temperature, ambient humidity, and solar radiation, as well as the physical properties of the wire itself, such as the diameter, age, and resistance of the wire. [0003] When designing overhead transmission lines in my country, the allowable carrying capacity of overhead transmission lines is calculated according to very harsh weather conditions, that is, according to the ambient temperature of 40 ° C, the average wind spee...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/00G06F19/00
CPCY02A30/00
Inventor 戴沅程养春林介东詹花茂王伟齐波何凤生孔健良
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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