A method and system for calculating the temperature of a lightning arrester

A calculation method and lightning arrester technology, applied in calculation, computer-aided design, instruments, etc., can solve the problems of high heating performance cost of zinc oxide resistors, inability to obtain the temperature distribution of zinc oxide resistors, long research cycle, etc., to save research The effect of cost reduction, shortened research cycle, and high accuracy

Active Publication Date: 2018-12-14
STATE GRID HUNAN ELECTRIC POWER +2
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Problems solved by technology

[0005] The present invention provides a method and system for calculating the temperature of an arrester that overcomes the above-mentioned problems or at least partially solves the above-mentioned problems. Obtain the problem of temperature distribution of zinc oxide resistors at each time

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  • A method and system for calculating the temperature of a lightning arrester
  • A method and system for calculating the temperature of a lightning arrester
  • A method and system for calculating the temperature of a lightning arrester

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Embodiment Construction

[0021] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0022] Such as figure 1 As shown, the figure shows a calculation method for arrester temperature, including:

[0023] Obtain the ambient temperature of the zinc oxide arrester at different times and the applied voltage and leakage current of the zinc oxide resistor in the zinc oxide arrester, and obtain the temperature of the zinc oxide resistor at different times based on the trained electrothermal coupling model;

[0024] The electrothermal coupling model includes a circuit model and a thermal circuit model, and the circuit model is used to obtain the power loss of the zinc oxide resistor sheet according to the applied voltage and the leakage current; and the heat diss...

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Abstract

A method and system for calculating the temperature of a lightning arrester includes calculating the equivalent resistance and leakage current of zinc oxide resistor sheet by neural network algorithmaccording to the volt-ampere characteristic curve of zinc oxide resistor sheet at different temperature when the zinc oxide arrester is in operation. According to the actual structure of the lightningarrester, the equivalent model of the thermal circuit of the lightning arrester is calculated. The power loss of the zinc oxide resistor chip is output from the circuit model and inputted into the thermal circuit model. The real-time distribution of the zinc oxide lightning arrester is calculated according to the thermal circuit model. The temperature characteristics of zinc oxide resistor sheetscan be calculated through modeling. Compared with the traditional test method, the method greatly shortens the research period and saves the research cost, and has higher accuracy than the traditional curve fitting method. The transient process of current and temperature changing with time can be obtained by using the electrothermal coupling method, taking into account the interaction between temperature and current.

Description

technical field [0001] The invention relates to the technical field of electrical engineering, and more particularly, to a method and system for calculating the temperature of an arrester. Background technique [0002] Power surge arresters are widely used in power supply and railway power systems to guide lightning current to the ground, thereby suppressing the impact of lightning wave overvoltage on power users. The quality of the power surge arrester directly affects the strength of the lightning protection performance of the power system. In actual operation, it often occurs that the arrester is damaged due to heat after being subjected to overvoltage. Therefore, it is necessary to study the heat generation performance of the arrester under different voltages. [0003] The excellent nonlinear U-I characteristics of the zinc oxide arrester play a key role in the overvoltage protection of the power grid. Zinc oxide arrester dominates the main position of overvoltage prot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F2119/08G06F30/20
Inventor 陆佳政谢鹏康方针李波蒋正龙
Owner STATE GRID HUNAN ELECTRIC POWER
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