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Zinc oxide resistor disc energy equalization matching 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., to reduce volt-ampere Differences in characteristics, improving protection performance, and reducing the effect of current non-uniformity coefficient

Active Publication Date: 2020-08-07
厦门中高智能电器科学研究院有限公司 +1
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  • 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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  • Zinc oxide resistor disc energy equalization matching 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 power systems, and particularly relates to a zinc oxide resistor disc energy equalization matching method, which comprises the processes of zinc oxide valve disc static volt-ampere characteristic normal distribution characteristic construction, zinc oxide valve disc energy distribution characteristic construction and zinc oxide valve disc energy equalization matching based on a normal distribution rule. Firstly, a zinc oxide valve plate static volt-ampere characteristic normal distribution rule is provided; secondly, a zinc oxide valve plate energy equalization principle is provided; and finally, a zinc oxide valve plate energy equalization matching method based on the normal distribution rule is proposed. The resistor disc with the maximum energy absorption difference in two lightning arresters with the maximum energy absorption difference are exchanged; multiple iteration is carried out; the current non-uniform coefficient of each lightning arrester column of the lightning arrester group is minimal, uniform energy distribution is realized, the current non-uniform coefficient of the lightning arrester group can be effectively reduced, parallel energy equalization of multi-column zinc oxide lightning arresters can be achieved, and the operation reliability of the lightning arrester group is improved.

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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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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