A Sampling and Measuring Method of Pollution Degree of Insulators

A measurement method and technology of insulators, applied in the direction of weighing by removing certain components, preparation of test samples, material resistance, etc., can solve the loss of insulator contamination, inaccurate measurement of equivalent salt density, and failure to take into account Gray dense measurement and other issues

Active Publication Date: 2011-12-28
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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Problems solved by technology

The main problem with this method is that the process of wiping the dirt and squeezing it into distilled water is easy to cause the loss of the insulator dirt, either lost during the transfer process, or adhered to the wiped sponge and cannot be completely dissolved in the test. Distilled water, resulting in inaccurate measurement of the equivalent salt density value, and this insulator pollution degree sampling measurement method does not take into account the measurement of dust density at all, and cannot truly reflect the influence of the insulator pollution degree withstand voltage, based on this It is difficult to guarantee the accuracy of the classification of grid pollution areas

Method used

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  • A Sampling and Measuring Method of Pollution Degree of Insulators
  • A Sampling and Measuring Method of Pollution Degree of Insulators
  • A Sampling and Measuring Method of Pollution Degree of Insulators

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Embodiment Construction

[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0050] Such as figure 1As shown, the non-charged insulators of the measurement line should be carried out on nine standard disk-shaped suspension strings, that is, at the end of the pollution accumulation period (generally from November to January of the next year), the upper and lower pieces should be removed, and the The seven insulators in the middle shall be measured by ESDD and NSDD in turn; when using live insulators, the reference insulator string shall be selected, and the insulators shall be measured on the ground by means of power outage maintenance or live work, and hands shall not touch the dirty layer on the surface of the insulators , When landing, avoid direct contact between the dirty layer on the surface of the insulator and the ground. It can be done piece by piece in the whole string, or two pieces can be taken from the upper, middle and lo...

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Abstract

The invention discloses a method for sampling and measuring the pollution degree of insulators. The method proposes a cleaning and sampling method for washing with a pressure water spray can, and adds the item of measuring ash density during the measurement process, which solves the problem of incomplete pollution degree measurement items , so that the test results are more in line with the real situation, and the invention also discloses a specially designed set of sampling funnel device, which is light and easy to carry to the site for sampling.

Description

technical field [0001] The invention relates to a method and a device for measuring the degree of contamination of insulators in a power system. Background technique [0002] Pollution flashover accidents of power transmission and transformation equipment seriously threaten the safety of power grid operation, and are one of the main accidents that power systems should focus on preventing. Scientifically determining the pollution level of the power grid and rationally selecting the level of external insulation configuration of equipment are effective measures to prevent grid pollution flashover accidents. The pollution degree of insulators is the only quantitative basis for dividing the pollution level of the grid, and it is of great significance for accurately determining the pollution level of the grid equipment. [0003] For a long time, the pollution level of my country's power grid has been divided by using the annual maximum equivalent salt density with reference to GB...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/04G01N5/04G01N1/28
Inventor 吴高林白云庆
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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