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Method for measuring non-uniform current distribution coefficient range of parallel multi-resistor piles

A technology of resistance piece column and current distribution, applied in the direction of measuring electricity, measuring device, measuring electricity variable, etc. problems, to achieve the effect of simple measurement method, easy operation and reliable measurement data

Active Publication Date: 2012-07-04
NANYANG JINGUAN ELECTRIC
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  • Application Information

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Problems solved by technology

[0004] Since the overvoltage protection device or energy absorbing device is composed of several columns, dozens of columns or even more than one hundred columns of nonlinear metal oxide resistors in parallel, if the current distribution unevenness coefficient of each parallel resistor column is measured as a whole group It is very difficult and requires a huge investment in test equipment
So far, this problem has not been satisfactorily resolved, making it difficult to reliably guarantee the production quality of related power equipment

Method used

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  • Method for measuring non-uniform current distribution coefficient range of parallel multi-resistor piles
  • Method for measuring non-uniform current distribution coefficient range of parallel multi-resistor piles
  • Method for measuring non-uniform current distribution coefficient range of parallel multi-resistor piles

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Embodiment Construction

[0021] The method for measuring the range of the current distribution non-uniformity coefficient of the multi-column parallel resistor sheet column group of the present invention will be further described below in conjunction with the embodiments.

[0022] In a group of overvoltage protection devices composed of nonlinear metal oxide resistors as the core components, the total number of resistor columns: N = 44 columns, and the number codes of each column are N 1 , N 2 , N 3 ...N m ...N 42 , N 43 , N 44 , and it is required that the current distribution non-uniformity coefficient β≤1.10 of the entire group of resistor sheets in the overvoltage protection device, the measurement method of the current distribution non-uniformity coefficient is carried out according to the following steps:

[0023] Step 1: Randomly combine the measured 44 columns of resistance sheets into 7 groups of resistance sheets, and the numbers of each group of resistance sheets are: 8 columns in the ...

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Abstract

The invention discloses a method for measuring the non-uniform current distribution coefficient range of parallel multi-resistor piles, which has the main characteristics that all resistor piles in a measured nonlinear metal oxide resistor pile group are firstly combined and divided into a plurality of resistor pile groups; a pile with the maximum current value and a pile with the minimum current value in all the resistor pile groups are measured and selected; then, the two piles are measured together; and finally, the non-uniform current distribution coefficient range of the resistor pile groups is computed according to the current of the two piles. According to the method, the accurate measurement of the maximum non-uniform current distribution coefficient of the parallel multi-resistor piles is realized; and moreover, the measuring method is simple and has convenience in operation and reliable measuring data.

Description

technical field [0001] The invention belongs to the technical field of detection of overvoltage protection devices in power systems, in particular to a method for measuring the range of the uneven coefficient range of current distribution of multi-column parallel resistor sheet columns. Background technique [0002] In the power system, gapless metal oxide surge arresters for AC or DC transmission systems and metal oxide voltage limiters for series compensation capacitor bank protection, energy absorbing devices such as DC conversion switch energy absorbing devices, generator demagnetization energy absorbing devices, etc. All belong to the overvoltage protection device composed of nonlinear metal oxide resistors as the core components. Due to the need to absorb a large amount of energy caused by overvoltage, it is often necessary to use multi-column parallel electrical combination to meet the technical requirements of the device. [0003] In the multi-column parallel nonli...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R19/00
Inventor 赵冬一胡淑慧王兰义常鹏江栋李玲徐学亭
Owner NANYANG JINGUAN ELECTRIC
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