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Method for evaluating aging state of ZnO piezoresistor based on temperature influence

A varistor, aging state technology, applied in the direction of measuring electrical variables, instruments, measuring devices, etc., can solve the problem of rarely considering the aging state of ZnO varistor, and achieve the effect of simple operation and improved accuracy

Active Publication Date: 2022-05-06
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There are few studies considering the aging state of ZnO varistors under the influence of temperature

Method used

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  • Method for evaluating aging state of ZnO piezoresistor based on temperature influence
  • Method for evaluating aging state of ZnO piezoresistor based on temperature influence
  • Method for evaluating aging state of ZnO piezoresistor based on temperature influence

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Embodiment Construction

[0036] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing, the present invention comprises the following steps:

[0037] An evaluation method based on the aging state of ZnO varistors under the influence of temperature is characterized in that, first, a test evaluation platform is built, and the platform includes: a host computer (1), an impact control device (2), an impact generation device (3), high-voltage coaxial cable (4), switch (5), constant temperature test box (6), ZnO varistor test sample (7), infrared temperature camera (8), temperature monitor (9) , voltage detection device (10), data collector (11), data processor (12), grounding grid (13);

[0038] The upper computer (1) is connected to the input end of the impact control device (2), the output end of the impact control device (2) is connected to the input end of the impact generation device (3), and the base of the impact generation device (3...

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Abstract

The invention relates to a method for evaluating the aging state of a ZnO piezoresistor based on temperature influence. A flow chart of the evaluation method is shown in Figure 2. The evaluation method comprises the following steps of: impacting the ZnO varistor through an impact generator, obtaining working current factors of the ZnO varistor under different impact times and temperatures by recording the impact times and a measured temperature value after impact, and finally obtaining an aging state evaluation factor of the ZnO varistor by combining the working current factors and working voltage factors. And judging the aging state of the ZnO varistor according to the calculated aging state evaluation factor of the ZnO varistor. The method has the advantages that the method for evaluating the aging state of the ZnO piezoresistor based on the temperature influence is provided, a test platform is built, the main implementation method is to consider the aging state evaluation factors of the ZnO piezoresistor, and the method is of great significance to stable operation of an electric power communication system.

Description

technical field [0001] The invention belongs to the field of varistor aging protection, in particular to an evaluation method based on the aging state of ZnO varistor under the influence of temperature. Background technique [0002] The excellent nonlinear characteristics of ZnO varistors make them widely used in power communication systems. ZnO varistors are the core components inside surge protectors and arresters. The main function of ZnO varistors is to prevent lightning current and Equipment damage due to overvoltage shock. In practical applications, ZnO varistors will age or even fail completely due to factors such as lightning current and overvoltage, thereby greatly reducing the service life. Once the ZnO varistor is damaged, lightning current and overvoltage will cause unpredictable damage to electrical equipment. The estimated harm will even affect the entire power communication system in serious cases. Therefore, understanding the aging state of ZnO varistors is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/22
CPCG01R29/22
Inventor 王东阳杨佳伟林智聪俞剑飞
Owner SOUTHWEST JIAOTONG UNIV
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