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Method for ensuring radio inference of transmission line

A technology of radio interference and transmission lines, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as no comprehensive consideration

Active Publication Date: 2012-06-20
STATE GRID ELECTRIC POWER RES INST
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Problems solved by technology

[0003] At present, the prediction of radio interference of transmission lines in my country usually adopts foreign empirical formulas, which can be used to guide the selection of conductors, etc. However, these formulas only consider the conditions of good weather, rainy days or wet conductors, but do not comprehensively consider temperature and humidity. The impact of environmental factors such as atmospheric density and atmospheric density on the corona effect has certain limitations in predicting radio interference in different weather

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  • Method for ensuring radio inference of transmission line
  • Method for ensuring radio inference of transmission line
  • Method for ensuring radio inference of transmission line

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples, but these examples should not be construed as limiting the present invention.

[0016] Firstly, through the actual measurement of ±500kV DC lines and 500kV and 1000kV AC lines, the variation law of radio interference statistics of transmission lines at different temperatures and humidity is obtained; through the method of corona cages, the radio interference changes of different split conductors at different altitudes are obtained Law; through the actual measurement of ±500kV DC line and 500kV and 1000kV AC line, the radio interference difference between rainy and sunny days is obtained; the measured value of radio interference under different environmental and climatic conditions such as temperature, humidity, altitude, and rainy day is compared with the predicted value , to obtain the prediction formula of radio interference under different climat...

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Abstract

The invention relates to a method for ensuring radio interference of a transmission line in different environment and climate conditions, which comprises the following steps of: obtaining change rules of radio interference in different temperatures, humidity and altitude heights and environmental climates of raining, snowing and the like through transmission line actual measurement and a corona cage test of the high-altitude transmission line; then, calculating the radio interference of the line by adopting a given radio interference calculation formula through modeling actual lines and comparing with the actual measurement situation, obtaining the differences between measuring values and actual measurement values of different environmental climates, and modifying the given radio interference calculation formula to obtain the radio interference predication formula in different environmental climates, so as to obtain the ensured value of the radio inference of the transmission line.

Description

technical field [0001] The invention belongs to the field of electromagnetic compatibility of high-voltage power transmission and transformation engineering, and specifically relates to a method for determining radio interference of power transmission lines under various environmental and climatic conditions. Background technique [0002] With the increase of the voltage level of the transmission system, the problem of corona effect has become one of the key technical issues of UHV transmission. When the electric field strength on the surface of the wire exceeds a certain critical value, the air molecules around the surface of the wire will be ionized to form positive and negative charged particles. The collision and recombination of positive and negative ions will generate photons, which is called corona discharge. Corona discharge will produce effects such as audible noise, radio interference and corona loss, which will affect the operation of the line and the surrounding ...

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Application Information

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IPC IPC(8): G01R31/00
Inventor 万保权陈豫朝张建功干喆渊李妮
Owner STATE GRID ELECTRIC POWER RES INST
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