Method for researching pollution flashover characters of natural pollutant retention insulator by considering pollution conversion coefficient

A conversion factor, insulator technology, applied in the research field of insulator pollution flashover characteristics

Active Publication Date: 2012-10-03
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +1
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Problems solved by technology

However, this method has certain limitations

Method used

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  • Method for researching pollution flashover characters of natural pollutant retention insulator by considering pollution conversion coefficient
  • Method for researching pollution flashover characters of natural pollutant retention insulator by considering pollution conversion coefficient
  • Method for researching pollution flashover characters of natural pollutant retention insulator by considering pollution conversion coefficient

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Embodiment Construction

[0021] Take 2 strings of charged natural pollution insulator strings on a 110kV iron tower (8 insulators in each string), among which, the 8 insulators of #1 string are only used to test the pollution degree, and the 8 insulators of #2 string are used for "pre-pollution". Measuring pollution degree after flash test".

[0022] In the following, the pollution flashover characteristics of natural pollution accumulating insulators are studied by using the method of considering the pollution conversion coefficient. The specific steps are as follows:

[0023] (a) Test the pollution degree of #1 series of 8 insulators, and obtain the equivalent salt density S of the upper surface of each insulator 1i上 , the upper surface gray density G 1i上 , lower surface equivalent salt density S 1i下 , lower surface gray density G 1i下 , where i=1,2,...,8, the results are shown in Table 1.

[0024] Table 1 The test results of the pollution degree of the upper surface of the #1 string of insulator...

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Abstract

The invention discloses a method for researching the pollution flashover characters of natural pollutant retention insulators by considering pollution conversion coefficient. In the conventional method, as for a charged insulator string acquired on a same base iron tower, a part of insulators are selected to be subjected to a pollution degree test, other insulators are subjected to a pollution flashover voltage test, and data analysis is carried out on the basis; and the conventional method has certain limitation. The method for researching the pollution flashover characters of the natural pollutant retention insulator is characterized by comprising the following steps of: separating the natural pollutant retention insulators acquired from the same base iron tower into two parts, wherein one part is used for the test analysis of surface equivalent salt deposit density and dust density, and the other part is used for a pollution flashover test; for considering the loss of partial pollutants positioned on the surfaces of the insulators in a pollution flashover process, correcting the pollution degree test data of the insulators after the insulators are subjected to the pollution flashover test; and carrying out regression analysis on the data of pollution flashover voltage, equivalent salt deposit density, whole wafer dust density and the equivalent salt deposit density ratio of upper and lower surfaces on the basis. In the invention, the functional relationship of the pollution flashover voltage of a natural pollutant retention insulator string and the surface pollution degree of the insulators can be more effectively obtained.

Description

technical field [0001] The invention relates to a research method for pollution flashover characteristics of insulators, in particular to a research method for pollution flashover characteristics of natural pollution insulators considering pollution conversion coefficients. Background technique [0002] Correctly evaluate the external insulation state of natural pollution insulators, and find the quantitative relationship between the pollution flashover voltage of natural pollution insulators and the equivalent salt density, dust density, and pollution distribution unevenness of the surface pollution degree, which is very important for realizing the prediction of insulator pollution flashover, Prevention is important. [0003] However, under the current power system condition-based maintenance system, power outages on transmission lines are rare, and it is very difficult to sample live insulators. On the same base tower, usually only 2~3 strings of charged natural pollution...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 王少华胡文堂刘黎梅冰笑罗盛董建洋
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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