CN113960395A - Method and device for evaluating temperature tolerance of valve plate of lightning arrester - Google Patents
Method and device for evaluating temperature tolerance of valve plate of lightning arrester Download PDFInfo
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- CN113960395A CN113960395A CN202111215881.5A CN202111215881A CN113960395A CN 113960395 A CN113960395 A CN 113960395A CN 202111215881 A CN202111215881 A CN 202111215881A CN 113960395 A CN113960395 A CN 113960395A
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/003—Environmental or reliability tests
Abstract
The invention discloses a method and a device for evaluating the temperature tolerance of a valve plate of an arrester, wherein the method comprises the following steps: measuring an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, generating an initial normalized volt-ampere characteristic curve according to the initial volt-ampere characteristic curve, and then calculating initial direct current characteristic voltage and an initial nonlinear coefficient of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve; measuring a second direct-current characteristic voltage and a second nonlinear coefficient of the lightning arrester valve plate to be evaluated after temperature processing; and comparing the second direct current characteristic voltage and the second nonlinear coefficient with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the lightning arrester to be evaluated according to the comparison result. By implementing the method and the device, the temperature tolerance of the valve plate of the lightning arrester can be evaluated.
Description
Technical Field
The invention relates to the technical field of power grids, in particular to a method and a device for evaluating the temperature tolerance of a valve plate of an arrester.
Background
The zinc oxide arrester becomes an important component of overvoltage protection of a power system due to excellent nonlinear performance, so that the electrical performance of the zinc oxide arrester during operation is very important. The gapless zinc oxide arrester can be impacted by overvoltage such as power frequency overvoltage, impact overvoltage and the like in the operation process. In this process, the zinc oxide arrester valve plate is subjected to a continuous injection of energy and absorbs it in the form of heat, so that its temperature rises continuously. When the temperature rises, the direct-current characteristic parameters corresponding to the zinc oxide arrester valve plate can change, and the reliability of power supply of a power grid can be affected, so that the temperature tolerance of the arrester valve plate needs to be evaluated.
Disclosure of Invention
The embodiment of the invention provides a method and a device for evaluating the temperature tolerance of an arrester valve plate, which can evaluate the temperature tolerance of the arrester valve plate.
An embodiment of the invention provides an assessment method for temperature tolerance of a valve plate of an arrester, which comprises the following steps: measuring an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, generating an initial normalized volt-ampere characteristic curve according to the initial volt-ampere characteristic curve, and then calculating initial direct current characteristic voltage and an initial nonlinear coefficient of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve;
measuring a second direct-current characteristic voltage and a second nonlinear coefficient of the lightning arrester valve plate to be evaluated after temperature processing; wherein the temperature treatment comprises: after the temperature of the valve plate of the lightning arrester to be evaluated is increased to a first preset temperature, gradually reducing the temperature to an initial temperature;
and comparing the second direct current characteristic voltage and the second nonlinear coefficient with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated according to a comparison result.
Further, the method also comprises the following steps: in the cooling process, the temperature and the volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated at each temperature node are measured, and the direct-current characteristic voltage and the nonlinear coefficient of the valve plate of the lightning arrester to be evaluated at each temperature are calculated according to the temperature and the volt-ampere characteristic curve;
and comparing the direct current characteristic voltage and the nonlinear coefficient of the valve plate of the arrester to be evaluated at each temperature with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated at each temperature according to the comparison result.
Further, comparing the second dc characteristic voltage and the second nonlinear coefficient with the initial dc characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature endurance of the arrester to be evaluated according to the comparison result, specifically including:
calculating a first variation amplitude of the second direct current characteristic voltage relative to the initial direct current characteristic voltage;
calculating a second variation amplitude of the second nonlinear coefficient relative to the initial nonlinear coefficient;
and when the first variation amplitude and the second variation amplitude do not exceed 5%, judging that the temperature tolerance capability of the valve plate of the arrester to be evaluated is qualified.
Further, calculating the initial direct-current characteristic voltage of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve, specifically comprising:
extracting 0.1mA/cm from the normalized volt-ampere characteristic curve2、0.2mA/cm2、0.5mA/cm2、1mA/cm2、1.5mA/cm2And 2mA/cm2And the potential gradient value at the current density is used as the initial direct current characteristic voltage.
On the basis of the above method item embodiment, the present invention correspondingly provides an apparatus item embodiment;
an embodiment of the present invention provides an apparatus for evaluating temperature tolerance of a valve plate of an arrester, including: the device comprises a first parameter testing module, a second parameter testing module and a temperature tolerance capability evaluation module;
the first parameter testing module is used for measuring an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, generating an initial normalized volt-ampere characteristic curve according to the initial volt-ampere characteristic curve, and then calculating an initial direct current characteristic voltage and an initial nonlinear coefficient of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve;
the second parameter testing module is used for measuring a second direct-current characteristic voltage and a second nonlinear coefficient of the lightning arrester valve plate to be evaluated after temperature processing; wherein the temperature treatment comprises: after the temperature of the valve plate of the lightning arrester to be evaluated is increased to a first preset temperature, gradually reducing the temperature to an initial temperature;
and the temperature endurance evaluation module is used for comparing the second direct current characteristic voltage and the second nonlinear coefficient with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature endurance of the arrester to be evaluated according to a comparison result.
Further, a second temperature tolerance capacity evaluation module is also included;
the second temperature tolerance capacity evaluation module is used for measuring the temperature and the volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated at each temperature node in the cooling process, and calculating the direct-current characteristic voltage and the nonlinear coefficient of the valve plate of the lightning arrester to be evaluated at each temperature according to the temperature and the volt-ampere characteristic curve;
and comparing the direct current characteristic voltage and the nonlinear coefficient of the valve plate of the arrester to be evaluated at each temperature with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated at each temperature according to the comparison result. The embodiment of the invention has the following beneficial effects:
the embodiment of the invention discloses a method for evaluating the temperature tolerance of an arrester valve plate, which is characterized in that the initial direct current characteristic voltage and the initial nonlinear coefficient of the arrester valve plate to be evaluated before being heated are compared with the second direct current characteristic voltage and the second nonlinear coefficient of the arrester valve plate to be evaluated, which are recovered to the initial temperature after being heated, and finally, the temperature tolerance of the arrester valve plate to be evaluated can be evaluated according to the comparison result.
Drawings
Fig. 1 is a schematic flow chart of a method for evaluating temperature tolerance of a lightning arrester valve plate according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a dc characteristic voltage of a valve plate of an arrester to be evaluated at each temperature according to an embodiment of the present invention.
Fig. 3 is a schematic view of a nonlinear coefficient of a valve plate of an arrester to be evaluated at each temperature according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of an apparatus for evaluating temperature tolerance of a lightning arrester valve plate according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a method for evaluating temperature tolerance of a lightning arrester valve plate, which at least includes:
step S101: measuring an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, generating an initial normalized volt-ampere characteristic curve according to the initial volt-ampere characteristic curve, and then calculating initial direct current characteristic voltage and an initial nonlinear coefficient of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve.
S102, measuring a second direct-current characteristic voltage and a second nonlinear coefficient of the valve plate of the lightning arrester to be evaluated after temperature processing; wherein the temperature treatment comprises: after the temperature of the valve plate of the lightning arrester to be evaluated is increased to a first preset temperature, gradually reducing the temperature to an initial temperature;
and S103, comparing the second direct current characteristic voltage and the second nonlinear coefficient with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated according to a comparison result.
In step S101, in a preferred embodiment, calculating an initial dc characteristic voltage of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve specifically includes:
extracting 0.1mA/cm from the normalized volt-ampere characteristic curve2、0.2mA/cm2、0.5mA/cm2、1mA/cm2、1.5mA/cm2And 2mA/cm2And the potential gradient value at the current density is used as the initial direct current characteristic voltage.
In a preferred embodiment, the initial nonlinear coefficient is calculated by the following formula:
wherein α is the initial nonlinear coefficient, I1Is 0.1mA/cm2，I2Is 1mA/cm2，U1Is 0.1mA/cm in the initial normalized volt-ampere characteristic curve2Corresponding potential gradient value, U2Is 1mA/cm in the initial normalized volt-ampere characteristic curve2The corresponding potential gradient value.
Specifically, an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated is measured, and then the current is divided by the bottom area of the valve plate of the lightning arrester to be evaluated to obtain the current density (mA/cm)2) Dividing the voltage by the height of the valve plate of the lightning arrester to be evaluated to obtain a potential gradient (kV/cm), generating the initial normalized volt-ampere characteristic curve according to the current density and the potential gradient, and then performing initial regressionNormalizing the volt-ampere characteristic curve, and calculating corresponding initial direct current characteristic voltage and initial nonlinear coefficient.
For step S102, in a preferred embodiment, the first preset temperature is set to 250 ℃, in an actual situation, a specific temperature value of the first preset temperature may be set according to an actual requirement, after the temperature of the valve plate of the lightning arrester to be evaluated is raised to 250 ℃, the temperature is maintained for a period of time so that the valve plate of the lightning arrester to be evaluated is fully heated, then the temperature is gradually reduced, the gradient of temperature reduction during temperature reduction may be controlled to 10 ℃, and after the valve plate of the lightning arrester to be evaluated is restored to the initial temperature, the second dc characteristic voltage and the second nonlinear coefficient thereof are measured.
For step S103, in a preferred embodiment, the comparing the second dc characteristic voltage and the second nonlinear coefficient with the initial dc characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated according to the comparison result specifically includes:
calculating a first variation amplitude of the second direct current characteristic voltage relative to the initial direct current characteristic voltage;
calculating a second variation amplitude of the second nonlinear coefficient relative to the initial nonlinear coefficient;
and when the first variation amplitude and the second variation amplitude do not exceed 5%, judging that the temperature tolerance capability of the valve plate of the arrester to be evaluated is qualified.
After the temperature of the valve plate of the lightning arrester to be evaluated is restored to the initial temperature (namely the temperature before the temperature is not raised), measuring a volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, and then equally dividing the current in the volt-ampere characteristic curve by the bottom area of the valve plate of the lightning arrester to be evaluated to obtain the current density (mA/cm)2) Dividing the voltage by the height of the lightning arrester valve plate to be evaluated to obtain a potential gradient (kV/cm), generating the normalized volt-ampere characteristic curve according to the current density and the potential gradient, and extracting 0.1mA/cm from the normalized volt-ampere characteristic curve2、0.2mA/cm2、0.5mA/cm2、1mA/cm2、1.5mA/cm2And 2mA/cm2The potential gradient value at the current density is used as the second DC characteristic voltage, and then 0.1mA/cm in the normalized volt-ampere characteristic curve is obtained2Corresponding potential gradient value of 1mA/cm2Corresponding potential gradient value of 0.1mA/cm2Current density and 1mA/cm2A current density calculating a second nonlinear coefficient with reference to the formula for calculating the initial nonlinear coefficient; and then comparing the second direct current characteristic voltage with the initial direct current characteristic voltage, comparing the second nonlinear coefficient with the initial nonlinear coefficient, and if the variation amplitude of the second nonlinear coefficient relative to the initial nonlinear coefficient is not more than 5% and the variation amplitude of the potential gradient value under each current density in the second direct current characteristic voltage is not more than 5% compared with the variation amplitude of the potential gradient value under the corresponding current density in the initial direct current characteristic voltage, judging that the temperature tolerance capability of the valve plate of the arrester to be evaluated is qualified.
In a preferred embodiment, in the process of measuring and cooling, the temperature and the volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated at each time interval are measured, and the direct-current characteristic voltage and the nonlinear coefficient of the valve plate of the lightning arrester to be evaluated at each temperature are calculated according to the temperature and the volt-ampere characteristic curve;
and comparing the direct current characteristic voltage and the nonlinear coefficient of the valve plate of the arrester to be evaluated at each temperature with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated at each temperature according to the comparison result.
Specifically, the volt-ampere curve of the valve plate of the lightning arrester to be evaluated is measured at each temperature node in the cooling process of the valve plate of the lightning arrester to be evaluated, the gradient of temperature reduction is controlled to be about 10 ℃, and the volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated is measured while the temperature of the valve plate of the lightning arrester to be evaluated is scanned by using a thermal infrared imager so as to ensure the consistency of the temperature and the volt-ampere characteristic curve. The single characteristic voltammogram measurement time was 10s (6 s for voltage rise, 4s for voltage drop).
And then generating a normalized volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated at each temperature node in the cooling process according to the same method, and calculating the direct-current characteristic voltage and the nonlinear coefficient at each temperature node according to the same principle through the normalized volt-ampere characteristic curve of each temperature node. Schematically, the direct-current characteristic voltage of the valve plate of the lightning arrester to be evaluated at each temperature node in the cooling process can be shown in fig. 2, and the nonlinear coefficient of the valve plate of the lightning arrester to be evaluated at each temperature node in the cooling process can be shown in fig. 3.
And finally, comparing the direct current characteristic voltage and the nonlinear coefficient under each temperature node with the initial direct current characteristic voltage and the initial nonlinear coefficient, so as to evaluate the temperature tolerance of the valve plate of the lightning arrester to be evaluated under each temperature node.
Schematically, the degree of change of the dc characteristic voltage of a valve plate of an arrester to be evaluated at different temperatures is shown in table 1. The smaller the current density, the larger the variation amplitude of the corresponding characteristic voltage, the obvious variation of the nonlinear performance mainly after 150 ℃, and the loss degree of the valve plate performance can be judged according to the variation amplitude of different characteristic voltages at different temperatures.
TABLE 1 amplitude of variation of DC characteristic voltage at different temperatures
Schematically, the nonlinear coefficient and the variation amplitude of the valve plate of the lightning arrester to be evaluated at different temperatures are shown in table 2. From table 2, it can be seen that the valve sheet almost completely loses the non-linear characteristic at 200 ℃, but the original characteristic can be recovered after the temperature is recovered.
TABLE 2 amplitude of variation of DC characteristic voltage at different temperatures
| Temperature of | Coefficient of non-linearity | Amplitude of |
| 50℃ | 34.69 | 0.5％ |
| 100℃ | 22.40 | 35.7％ |
| 150℃ | 8.99 | 74.2％ |
| 200℃ | 2.81 | 91.9％ |
| 250℃ | 1.18 | 96.6％ |
On the basis of the above method item embodiments, the present invention correspondingly provides apparatus item embodiments;
as shown in fig. 4, an embodiment of the present invention provides an apparatus for evaluating temperature tolerance of a lightning arrester valve plate, including: the device comprises a first parameter testing module, a second parameter testing module and a temperature tolerance capability evaluation module;
the first parameter testing module is used for measuring an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, generating an initial normalized volt-ampere characteristic curve according to the initial volt-ampere characteristic curve, and then calculating an initial direct current characteristic voltage and an initial nonlinear coefficient of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve;
the second parameter testing module is used for measuring a second direct-current characteristic voltage and a second nonlinear coefficient of the lightning arrester valve plate to be evaluated after temperature processing; wherein the temperature treatment comprises: after the temperature of the valve plate of the lightning arrester to be evaluated is increased to a first preset temperature, gradually reducing the temperature to an initial temperature;
and the temperature endurance evaluation module is used for comparing the second direct current characteristic voltage and the second nonlinear coefficient with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature endurance of the arrester to be evaluated according to a comparison result.
In a preferred embodiment, the device further comprises a second temperature endurance evaluation module;
the second temperature tolerance capacity evaluation module is used for measuring the temperature and the volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated at each temperature node in the cooling process, and calculating the direct-current characteristic voltage and the nonlinear coefficient of the valve plate of the lightning arrester to be evaluated at each temperature according to the temperature and the volt-ampere characteristic curve;
and comparing the direct current characteristic voltage and the nonlinear coefficient of the valve plate of the arrester to be evaluated at each temperature with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated at each temperature according to the comparison result.
It should be noted that the embodiment of the apparatus provided by the present invention corresponds to the implementation of the method, which can implement the method for evaluating the temperature tolerance of the valve plate of the lightning arrester according to any one of the method items of the present invention, and the above-described embodiment of the apparatus is merely illustrative, wherein the units described as the separate components may or may not be physically separated, and the components displayed as the units may or may not be physical units, that is, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. In addition, in the drawings of the embodiment of the apparatus provided by the present invention, the connection relationship between the modules indicates that there is a communication connection between them, and may be specifically implemented as one or more communication buses or signal lines. One of ordinary skill in the art can understand and implement it without inventive effort.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (7)
1. An assessment method for temperature tolerance capability of a lightning arrester valve plate is characterized by comprising the following steps:
measuring an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, generating an initial normalized volt-ampere characteristic curve according to the initial volt-ampere characteristic curve, and then calculating initial direct current characteristic voltage and an initial nonlinear coefficient of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve;
measuring a second direct-current characteristic voltage and a second nonlinear coefficient of the lightning arrester valve plate to be evaluated after temperature processing; wherein the temperature treatment comprises: after the temperature of the valve plate of the lightning arrester to be evaluated is increased to a first preset temperature, gradually reducing the temperature to an initial temperature;
and comparing the second direct current characteristic voltage and the second nonlinear coefficient with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated according to a comparison result.
2. The method for evaluating the temperature tolerance of the valve plate of the lightning arrester according to claim 1, further comprising:
in the cooling process, the temperature and the volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated at each temperature node are measured, and the direct-current characteristic voltage and the nonlinear coefficient of the valve plate of the lightning arrester to be evaluated at each temperature are calculated according to the temperature and the volt-ampere characteristic curve;
and comparing the direct current characteristic voltage and the nonlinear coefficient of the valve plate of the arrester to be evaluated at each temperature with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated at each temperature according to the comparison result.
3. The method for evaluating the temperature tolerance of the valve plate of the arrester according to claim 1, wherein the second dc characteristic voltage and the second nonlinear coefficient are compared with the initial dc characteristic voltage and the initial nonlinear coefficient, and the temperature tolerance of the arrester to be evaluated is evaluated according to the comparison result, specifically comprising:
calculating a first variation amplitude of the second direct current characteristic voltage relative to the initial direct current characteristic voltage;
calculating a second variation amplitude of the second nonlinear coefficient relative to the initial nonlinear coefficient;
and when the first variation amplitude and the second variation amplitude do not exceed 5%, judging that the temperature tolerance capability of the valve plate of the arrester to be evaluated is qualified.
4. The method for evaluating the temperature tolerance of the valve plate of the arrester according to claim 1, wherein the step of calculating the initial direct-current characteristic voltage of the valve plate of the arrester to be evaluated according to the initial normalized volt-ampere characteristic curve specifically comprises the steps of:
extracting 0.1mA/cm from the initial normalized volt-ampere characteristic curve2、0.2mA/cm2、0.5mA/cm2、1mA/cm2、1.5mA/cm2And 2mA/cm2And the potential gradient value at the current density is used as the initial direct current characteristic voltage.
5. The method for evaluating the temperature endurance of a valve plate of an arrester according to claim 4, wherein the initial nonlinear coefficient is calculated by the following formula:
wherein α is the initial nonlinear coefficient, I1Is 0.1mA/cm2，I2Is 1mA/cm2，U1Is 0.1mA/cm in the initial normalized volt-ampere characteristic curve2Corresponding potential gradient value, U2Is 1mA/cm in the initial normalized volt-ampere characteristic curve2The corresponding potential gradient value.
6. An assessment device of temperature endurance capacity of a lightning arrester valve plate is characterized by comprising: the device comprises a first parameter testing module, a second parameter testing module and a temperature tolerance capability evaluation module;
the first parameter testing module is used for measuring an initial volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated, generating an initial normalized volt-ampere characteristic curve according to the initial volt-ampere characteristic curve, and then calculating an initial direct current characteristic voltage and an initial nonlinear coefficient of the valve plate of the lightning arrester to be evaluated according to the initial normalized volt-ampere characteristic curve;
the second parameter testing module is used for measuring a second direct-current characteristic voltage and a second nonlinear coefficient of the lightning arrester valve plate to be evaluated after temperature processing; wherein the temperature treatment comprises: after the temperature of the valve plate of the lightning arrester to be evaluated is increased to a first preset temperature, gradually reducing the temperature to an initial temperature;
and the temperature endurance evaluation module is used for comparing the second direct current characteristic voltage and the second nonlinear coefficient with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature endurance of the arrester to be evaluated according to a comparison result.
7. The device for evaluating the temperature tolerance of the arrester valve plate according to claim 6, comprising: a second temperature tolerance assessment module;
the second temperature tolerance capacity evaluation module is used for measuring the temperature and the volt-ampere characteristic curve of the valve plate of the lightning arrester to be evaluated at each temperature node in the cooling process, and calculating the direct-current characteristic voltage and the nonlinear coefficient of the valve plate of the lightning arrester to be evaluated at each temperature according to the temperature and the volt-ampere characteristic curve;
and comparing the direct current characteristic voltage and the nonlinear coefficient of the valve plate of the arrester to be evaluated at each temperature with the initial direct current characteristic voltage and the initial nonlinear coefficient, and evaluating the temperature tolerance of the arrester to be evaluated at each temperature according to the comparison result.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236057A (en) * | 2011-01-14 | 2011-11-09 | 广东电网公司电力科学研究院 | Method for testing release device supporting lightning arrester |
| CN103743968A (en) * | 2013-12-17 | 2014-04-23 | 上海交通大学 | Metal oxide arrester multiple-lightning-current withstand test method |
| CN106546864A (en) * | 2016-09-23 | 2017-03-29 | 清华大学 | A kind of variable temperature measurement device of simple ZnO resistors valve block electric parameter |
| CN108414862A (en) * | 2018-03-09 | 2018-08-17 | 中国南方电网有限责任公司超高压输电公司曲靖局 | High voltage direct current neutral bus arrester energy is resistant to on-line monitoring system and method |
| CN108845214A (en) * | 2018-07-16 | 2018-11-20 | 三峡大学 | A kind of method of resistor valve sheet performance in analysis Zinc-Oxide Arrester |
| CN112904118A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | Thermal aging evaluation system and method for valve plate of lightning arrester |
| CN113075523A (en) * | 2021-03-22 | 2021-07-06 | 云南电网有限责任公司保山供电局 | Novel fitting method for direct current volt-ampere characteristic of ZnO valve plate |
-
2021
- 2021-10-19 CN CN202111215881.5A patent/CN113960395A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102236057A (en) * | 2011-01-14 | 2011-11-09 | 广东电网公司电力科学研究院 | Method for testing release device supporting lightning arrester |
| CN103743968A (en) * | 2013-12-17 | 2014-04-23 | 上海交通大学 | Metal oxide arrester multiple-lightning-current withstand test method |
| CN106546864A (en) * | 2016-09-23 | 2017-03-29 | 清华大学 | A kind of variable temperature measurement device of simple ZnO resistors valve block electric parameter |
| CN108414862A (en) * | 2018-03-09 | 2018-08-17 | 中国南方电网有限责任公司超高压输电公司曲靖局 | High voltage direct current neutral bus arrester energy is resistant to on-line monitoring system and method |
| CN108845214A (en) * | 2018-07-16 | 2018-11-20 | 三峡大学 | A kind of method of resistor valve sheet performance in analysis Zinc-Oxide Arrester |
| CN112904118A (en) * | 2021-01-20 | 2021-06-04 | 云南电网有限责任公司电力科学研究院 | Thermal aging evaluation system and method for valve plate of lightning arrester |
| CN113075523A (en) * | 2021-03-22 | 2021-07-06 | 云南电网有限责任公司保山供电局 | Novel fitting method for direct current volt-ampere characteristic of ZnO valve plate |
Non-Patent Citations (1)
| Title |
|---|
| 蔡汉生 等: "金属氧化物避雷器V-A 温度特性研究", 《电瓷避雷器》, no. 290, pages 63 - 67 * |
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