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Method for measuring power grid icing volume density and porosity

A technology of bulk density and measurement method, used in specific gravity measurement, measurement device, suspension and porous material analysis, etc. and porosity is accurate, the measurement calculation is simple and easy to implement

Inactive Publication Date: 2015-10-28
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve this problem, before using the liquid drainage method to measure the ice-covered volume, the ice-covered surface is covered with polyvinyl amine vinyl ester film, which can prevent the liquid from entering the interior. It is difficult for the film to cover the ice-covered surface evenly, and the gap between the film and the ice will make the measured volume too large. In addition, this method is not suitable for field operation

Method used

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Embodiment Construction

[0025] The present invention will be further described below in conjunction with specific examples.

[0026] A method for measuring the ice-covered bulk density and porosity of a power grid, (1) take an ice-covered sample and place it in a container, and measure the mass of the ice-covered sample as m 1 ;

[0027] (2) Take out the ice-covered sample from the container, add a certain amount of water to the container, and measure the quality of the water as M 1 ;

[0028] (3) Put the ice-coated sample into the container, and after the sample is completely submerged in water, measure the mass of the ice-coated sample and water as M 2 ;

[0029] (4) Pour out the water in the container of step (3) quickly, and measure the mass of the ice-coated sample at this time as m 2 ;

[0030] (5) Calculate the real volume V of the ice-coated sample 2 :

[0031] V 2 =(M 2 -M 1 ) / ρ 液

[0032] In the formula: ρ 液 is the density of water;

[0033] (6) Calculate the volume V of the i...

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Abstract

The invention discloses a method for measuring power grid icing volume density and porosity. The method comprises the following steps that 1, an icing sample is placed in a container, and the mass of the icing sample is measured as m<1>; 2, the icing sample is taken out of the container, a certain quantity of water is added to the container, and the mass of the water is measured as M<1>; 3, the icing sample is placed in the container, and after the sample is completely immersed in the water, the mass of the icing sample and the water is measured as M<2; 4, the water in the container in the step 3 is poured out fast, and the mass of the icing sample at this moment is measured as m<2>; 5, the true volume V<2> of the icing sample is calculated; 6, the volume V<1> of the icing sample with concave portions is calculated; 7, the icing volume density p<ti> is calculated; 8, the porosity P of the icing sample is calculated. The measured and calculated icing density and porosity are accurate, and the method is suitable for measurement of on-site ice taking personnel after local sampling.

Description

technical field [0001] The invention relates to a power grid ice coating measurement and a measurement method, in particular to a power grid ice coating volume density and porosity measurement method. Background technique [0002] Icing of power grids has always been a technical problem that has plagued countries all over the world. Accidents such as wire dancing, disconnection, tower collapse, flashover and even grid disassembly caused by icing have seriously threatened the safe operation of the power system and caused huge losses to the national economy and people's livelihood. loss. With the increase of the voltage level of the transmission line and the increase of the transmission distance, the topography, altitude, climate conditions and atmospheric environment of the passing area are becoming more and more complex, and the icing conditions and icing forms in different regions are different, so it must be targeted at different regions Seek differentiated power grid ici...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N9/00G01N15/08
Inventor 李亚伟张星海
Owner STATE GRID CORP OF CHINA
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