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A kind of zinc oxide resistor sheet can be combined group method

A zinc oxide resistor sheet, zinc oxide valve sheet technology, applied in resistors, resistor manufacturing, varistor and other directions, can solve the problems of uneven current distribution, aging arrester, poor volt-ampere characteristics, etc. The effect of uniform coefficient, improving protection performance and improving operational reliability

Active Publication Date: 2022-02-01
厦门中高智能电器科学研究院有限公司 +1
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Surge arrester is a main equipment used for lightning protection in power system, and zinc oxide resistor is the core component of surge arrester. Zinc oxide resistor is a functional composite ceramic material. Large capacity and other characteristics make it play an important role in limiting the overvoltage amplitude and absorbing overvoltage energy in the zinc oxide arrester. As the core component of the arrester, it is widely used in power systems to protect electrical equipment from lightning and other overvoltages. The difference in volt-ampere characteristics of the arrester group will cause uneven current distribution, and the arrester with poor volt-ampere characteristics will accelerate aging and even be broken down, causing serious safety problems

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  • A kind of zinc oxide resistor sheet can be combined group method

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Embodiment 1

[0025] see figure 1 , the present invention provides the following technical solutions: a zinc oxide resistor can be grouped method, including zinc oxide valve static volt-ampere characteristics of the normal distribution characteristic construction, zinc oxide valve energy distribution characteristic construction and based on the normal distribution law Zinc oxide valves can be combined with three processes.

[0026] Specifically, according to the measurement data of the reference voltage U1mA of 23 pieces of resistors, the normal distribution characteristics of the reference voltage are constructed to satisfy the normal distribution U1mA~N(μ,σ 2 ) (where μ is the mean value of 23 pieces of resistor U1mA reference voltage, σ 2 It is the standard deviation of the reference voltage U1mA of 23 pieces of resistors).

[0027] Specifically, according to the static volt-ampere characteristics (V-A) of m zinc oxide valve slices, exponential function fitting and characteristic curve...

Embodiment 2

[0037] see figure 1 , the present invention provides the following technical solutions: a zinc oxide resistor can be grouped method, including zinc oxide valve static volt-ampere characteristics of the normal distribution characteristic construction, zinc oxide valve energy distribution characteristic construction and based on the normal distribution law Zinc oxide valves can be combined with three processes.

[0038] Specifically, according to the measurement data of the reference voltage U1mA of 25 pieces of resistors, the normal distribution characteristics of the reference voltage are constructed to satisfy the normal distribution U1mA~N(μ,σ 2 ) (where μ is the mean value of 25 pieces of resistor U1mA reference voltage, σ 2 It is the standard deviation of the reference voltage U1mA of 25 pieces of resistors).

[0039] Specifically, according to the static volt-ampere characteristics (V-A) of m zinc oxide valve slices, exponential function fitting and characteristic curve...

Embodiment 3

[0049] see figure 1, the present invention provides the following technical solutions: a zinc oxide resistor can be grouped method, including zinc oxide valve static volt-ampere characteristics of the normal distribution characteristic construction, zinc oxide valve energy distribution characteristic construction and based on the normal distribution law Zinc oxide valves can be combined with three processes.

[0050] Specifically, according to the measurement data of the reference voltage U1mA of 30 pieces of resistors, the normal distribution characteristics of the reference voltage are constructed to satisfy the normal distribution U1mA~N(μ,σ 2 ) (where μ is the mean value of the reference voltage U1mA of 30 pieces of resistors, σ 2 It is the standard deviation of the reference voltage U1mA of 30 pieces of resistors).

[0051] Specifically, according to the static volt-ampere characteristics (V-A) of m zinc oxide valve slices, exponential function fitting and characteristi...

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Abstract

The invention belongs to the technical field of electric power systems, in particular to a method for combining zinc oxide resistance plates, which includes the construction of the normal distribution characteristics of the static volt-ampere characteristics of the zinc oxide valve plates, the construction of the energy distribution characteristics of the zinc oxide valve plates, and the normal distribution based Regular zinc oxide valves can be combined in three processes; firstly, the normal distribution law of static volt-ampere characteristics of zinc oxide valves is proposed; All valves can be matched in groups, swapping the resistors with the largest energy absorption difference among the two-column surge arresters with the largest difference in energy absorption, and performing multiple iterations to achieve the smallest current unevenness coefficient of each arrester column in the arrester group, and realize the uniform distribution of energy , can effectively reduce the current non-uniformity coefficient of the arrester group, realize the uniform distribution of energy, can realize the parallel connection of multi-column zinc oxide arresters, and improve the operation reliability of the arrester group.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a method for combining all zinc oxide resistance plates. Background technique [0002] Surge arrester is a main equipment used for lightning protection in power system, and zinc oxide resistor is the core component of surge arrester. Zinc oxide resistor is a functional composite ceramic material. Large capacity and other characteristics make it play an important role in limiting the overvoltage amplitude and absorbing overvoltage energy in the zinc oxide arrester. As the core component of the arrester, it is widely used in power systems to protect electrical equipment from lightning and other overvoltages. The difference in volt-ampere characteristics of the arrester group will cause uneven current distribution, and the arrester with poor volt-ampere characteristics will accelerate aging and even be broken down, causing serious safety problems. [0003...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/12H01C7/00H01C17/00
CPCH01C7/12H01C7/001H01C17/00
Inventor 张泽林黄辉兴曹忺刘斌
Owner 厦门中高智能电器科学研究院有限公司
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