CN112326736B - Nondestructive testing method for zinc oxide arrester valve plate - Google Patents
Nondestructive testing method for zinc oxide arrester valve plate Download PDFInfo
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- CN112326736B CN112326736B CN202011152002.4A CN202011152002A CN112326736B CN 112326736 B CN112326736 B CN 112326736B CN 202011152002 A CN202011152002 A CN 202011152002A CN 112326736 B CN112326736 B CN 112326736B
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- oxide arrester
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- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
Abstract
The invention relates to the technical field of detection of an oxidizing lightning arrester valve plate, in particular to a nondestructive detection method of a zinc oxide lightning arrester valve plate. In the invention, a programmed direct-current high-voltage generator is used for pressurizing a connecting circuit to two opposite ends of a zinc oxide arrester valve plate to obtain a voltage value and a current value; then acquire the voltage value and the current value of other arbitrary two positions in the circuit respectively, compare three voltage value and current value, judge whether zinc oxide arrester valve block is damaged through the comparison result, solved the great problem of nondestructive test error that exists among the prior art.
Description
Technical Field
The invention relates to the technical field of detection of an oxidizing lightning arrester valve plate, in particular to a nondestructive detection method of a zinc oxide lightning arrester valve plate.
Background
The zinc oxide arrester is also called as a metal oxide arrester, and is an electric appliance which prevents various electric equipment from being damaged by lightning overvoltage, operation overvoltage and power frequency transient overvoltage impact. When the voltage reaches the breakdown voltage of the lightning arrester, the lightning current is discharged to the ground in a breakdown mode so as to release a large amount of energy.
The using effect of the zinc oxide arrester is based on the quality of the zinc oxide arrester valve plate, and the current capacity of the zinc oxide arrester valve plate is an important index of the quality of the zinc oxide arrester valve plate. The current capacity is an indication of how much current the arrester valve can pass, and of course these currents are the result of lightning overvoltages and operational overvoltages which dump the energy of lightning and the energy in the power system in the form of current to the arrester valve to see if it can withstand.
At present, the current capacity of the zinc oxide arrester valve plate is generally determined by the current capacity, destructive tests are adopted for detecting the current capacity, and meanwhile, the detection of the method adopts sampling inspection, the detection accuracy is poor, the misjudgment probability is high, and the method is an effective method for the comprehensive nondestructive detection method before the zinc oxide arrester is produced and put into production.
Secondly, the through-current capacity of the zinc oxide arrester valve plate is influenced by various factors, and the secondary influence parameter of the factors is the uniformity of the zinc oxide arrester valve plate. When the uniformity of the material is consistent, the through-flow capacity is better, otherwise, the through-flow capacity is poor.
Moreover, when the zinc oxide arrester is produced, the valve plate is generally subjected to double-sided aluminum plating based on the production process of the zinc oxide arrester valve plate, and the uniformity and even the through-current capacity of the zinc oxide arrester valve plate are affected after aluminum plating, so that the situation of poor use effect is easy to occur.
Disclosure of Invention
The invention aims to: in order to solve the problems in the prior art, the invention provides a nondestructive testing method for a zinc oxide arrester valve plate.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
a nondestructive testing method for a zinc oxide arrester valve plate comprises the following steps:
programming the direct-current high-voltage generator;
the method comprises the following steps of building an experimental platform for a zinc oxide arrester valve plate, fixing the zinc oxide arrester valve plate through the experimental platform, connecting a programmed direct-current high-voltage generator with the zinc oxide arrester valve plate through a circuit, and connecting a voltage and current measurer on the circuit;
pressurizing a zinc oxide arrester valve plate by a programmed direct-current high-voltage generator;
in the pressurizing process, acquiring and recording a first voltage value and a first current value of two ends of a zinc oxide arrester valve plate;
moving the programmed direct-current high-voltage generator to any other two positions of the circuit, and respectively obtaining a second voltage value, a second current value, a third voltage value and a third current value corresponding to the two positions;
comparing the first voltage value, the second voltage value and the third voltage value;
comparing the first current value, the second current value and the third current value;
if the difference between the first voltage value, the second voltage value and the third voltage value and the difference between the first current value, the second current value and the third current value are larger, judging that the zinc oxide arrester valve plate is damaged; and if the first voltage value, the second voltage value and the third voltage value are respectively similar to the first current value, the second current value and the third current value, judging that the zinc oxide arrester valve plate is not damaged.
As an improvement of the technical scheme of the nondestructive testing method for the zinc oxide arrester valve plate, the experiment platform comprises a clamp and two metal electrodes, the two metal electrodes are respectively connected with a circuit, the two metal electrodes form two clamping parts of the clamp, and the zinc oxide arrester valve plate is arranged between the two clamping parts.
As an improvement of the technical scheme of the nondestructive testing method for the zinc oxide arrester valve plate, the direct-current high-voltage generator is connected with an upper computer through a communication line, and the programming control of the direct-current high-voltage generator is realized through the upper computer.
As an improvement of the technical scheme of the nondestructive testing method of the zinc oxide arrester valve plate, the circuit is also connected with a dual-channel voltage and current measuring instrument.
As an improvement of the technical scheme of the nondestructive testing method of the zinc oxide arrester valve plate, the sampling rate of the dual-channel voltage and current measuring instrument is maximally 1MS/s, the sampling current measuring range is 10 muA-3A, and the voltage measuring range is 100 mV-1000V.
As an improvement of the technical scheme of the nondestructive testing method for the zinc oxide arrester valve plate, the zinc oxide arrester valve plate is a double-sided non-aluminum-plated valve plate, the sections of the two metal electrodes are opposite, and the two metal electrodes are respectively clamped on two opposite sides of the zinc oxide arrester valve plate.
The invention has the beneficial effects that:
in the invention, a programmed direct-current high-voltage generator is used for pressurizing a connecting circuit to two opposite ends of a zinc oxide arrester valve plate to obtain a voltage value and a current value; then acquire the voltage value and the current value of other arbitrary two positions in the circuit respectively, compare three voltage value and current value, judge whether zinc oxide arrester valve block is damaged through the comparison result, solved the great problem of nondestructive test error that exists among the prior art.
Drawings
FIG. 1 is a flow chart of the non-destructive testing of the present invention;
FIG. 2 is a schematic diagram of a non-destructive testing of the present invention;
FIG. 3 is a one-time experimental test structure of the present invention.
Description of reference numerals: 1-an upper computer; 2-a communication line; 3-a direct current high voltage generator; 4-two-channel voltage current measuring instrument; 5-a metal electrode; 6-conductive rubber; 7-zinc oxide arrester valve plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of embodiments of the present invention, and not all embodiments.
As shown in fig. 1 to 3, a nondestructive testing method for a zinc oxide arrester valve plate comprises the following steps:
programming the direct current high voltage generator 3;
an experimental platform of a zinc oxide arrester valve plate 7 is built, the zinc oxide arrester valve plate 7 is fixed through the experimental platform, the programmed direct-current high-voltage generator 3 is connected with the zinc oxide arrester valve plate 7 through a circuit, and a voltage and current measurer is connected to the circuit;
pressurizing a zinc oxide arrester valve plate 7 through a programmed direct-current high-voltage generator 3;
in the pressurizing process, acquiring and recording a first voltage value and a first current value of two ends of a zinc oxide arrester valve plate 7;
moving the programmed direct-current high-voltage generator 3 to any other two positions of the circuit, and respectively obtaining a second voltage value, a second current value, a third voltage value and a third current value corresponding to the two positions;
comparing the first voltage value, the second voltage value and the third voltage value;
comparing the first current value, the second current value and the third current value;
if the difference between the first voltage value, the second voltage value and the third voltage value and the difference between the first current value, the second current value and the third current value are larger, judging that the zinc oxide arrester valve plate 7 is damaged; and if the first voltage value, the second voltage value and the third voltage value are respectively similar to the first current value, the second current value and the third current value, judging that the zinc oxide arrester valve plate 7 is lossless.
In the invention, the programmed direct-current high-voltage generator 3 is used for pressurizing the connecting circuit to two opposite ends of the zinc oxide arrester valve plate 7 to obtain a first voltage value and a first current value, then the voltage value and the current value of any other two positions in the circuit are respectively obtained, the three voltage values and the three current values are compared, whether the zinc oxide arrester valve plate 7 is damaged or not is judged according to the comparison result, and the problem of larger nondestructive detection error in the prior art is solved.
Further, the experiment platform comprises a clamp and two metal electrodes 5, the two metal electrodes 5 are respectively connected with a circuit, the two metal electrodes 5 form two clamping parts of the clamp, the zinc oxide arrester valve plate 7 is arranged between the two clamping parts, when the experiment platform is used, the zinc oxide arrester valve plate 7 is fixed through the clamp, the two metal electrodes 5 are respectively contacted with two opposite ends of the zinc oxide arrester valve plate 7, the effect of fixing the zinc oxide arrester valve plate 7 can be realized, the metal electrodes 5 can be connected with the circuit to form a loop, so that the voltage value and the current value can be measured, and the problem that the uniformity of the zinc oxide arrester valve plate 7 in the prior art is not good is solved.
The direct-current high-voltage generator 3 is connected with the upper computer 1 through the communication line 2, programming control over the direct-current high-voltage generator 3 is achieved through the upper computer 1, and the effect of a uniform pressurization process from zero to a set voltage is achieved, for example, the direct-current high-voltage generator can be set in 2s time through the upper computer 1.
The voltage and current measurer is a two-channel voltage and current measuring instrument 4, and the two-channel voltage and current measuring instrument 4 is a high-precision measuring instrument, so that the effect of acquiring more accurate data can be realized. Preferably, the sampling rate of the dual-channel voltage and current measuring instrument 4 is 1MS/s at most, the measuring range of the sampling current is 10 muA-3A, and the measuring range of the voltage is 100 mV-1000V.
The zinc oxide arrester valve plate 7 is a double-sided non-aluminum-plated valve plate, the sections of the two metal electrodes 5 are opposite, and the two metal electrodes 5 are clamped on two opposite sides of the zinc oxide arrester valve plate 7 respectively, so that the problems that the uniformity and even the through-current capacity of the zinc oxide arrester valve plate 7 are affected after aluminum plating in the prior art, and the using effect is not good easily occur are solved. Preferably, the conductive rubber 6 is arranged at one end of the metal electrode 5, which is in contact with the zinc oxide arrester, and the conductive effect between the metal electrode 5 and the zinc oxide arrester can be better through the conductive rubber 6.
The nondestructive testing method of the zinc oxide arrester comprises the following steps:
programming control over the direct current high voltage generator 3 is realized through programming of the upper computer 1, for example, a uniform pressurization process from zero to a set voltage is realized within a set time of 2s, and the effect of detecting a current value and a voltage value through the direct current high voltage generator 3 is realized;
an experiment platform of the zinc oxide arrester valve plate 7 is built, the zinc oxide arrester valve plate 7 is fixed through a clamp and two metal electrodes 5, and a loop is formed, so that the current value and the voltage value can be detected conveniently;
pressurizing the double-sided non-aluminum-plated zinc oxide arrester valve plate 7 through a programmed direct-current high-voltage generator and a clamp, and acquiring and recording a first voltage value and a first current value at two ends of the zinc oxide arrester valve plate 7 in the pressurizing process, wherein the maximum sampling rate of a double-channel voltage current value is 1MS/s, the measurement range of the sampling current is 10 muA-3A, and the measurement range of the voltage is 100 mV-1000V.
Randomly moving the metal electrode 5 to other two areas in the circuit, and recording a second voltage value, a second current value, a third voltage value and a third current value corresponding to the two positions;
comparing and analyzing the obtained three groups of voltage value and current value data, and judging that the zinc oxide arrester valve plate 7 is damaged if the difference between the first voltage value, the second voltage value and the third voltage value and the difference between the first current value, the second current value and the third current value are larger; and if the first voltage value, the second voltage value and the third voltage value are respectively similar to the first current value, the second current value and the third current value, judging that the zinc oxide arrester valve plate 7 is lossless.
As one group of measurement data in the invention, as shown in fig. 3, the first voltage value, the second voltage value, the third voltage value, the first current value, the second current value, and the third current value are respectively close to each other, and it is determined that the zinc oxide arrester valve plate 7 is not damaged.
All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Claims (6)
1. A nondestructive testing method for a zinc oxide arrester valve plate is characterized by comprising the following steps:
programming the direct-current high-voltage generator;
the method comprises the following steps of building an experimental platform for a zinc oxide arrester valve plate, fixing the zinc oxide arrester valve plate through the experimental platform, connecting a programmed direct-current high-voltage generator with the zinc oxide arrester valve plate through a circuit, and connecting a voltage and current measurer on the circuit;
pressurizing a zinc oxide arrester valve plate by a programmed direct-current high-voltage generator;
in the pressurizing process, acquiring and recording a first voltage value and a first current value of two ends of a zinc oxide arrester valve plate;
moving the programmed direct-current high-voltage generator to any other two positions of the circuit, and respectively obtaining a second voltage value, a second current value, a third voltage value and a third current value corresponding to the two positions;
comparing the first voltage value, the second voltage value and the third voltage value; comparing the first current value, the second current value and the third current value;
if the difference between the first voltage value, the second voltage value and the third voltage value and the difference between the first current value, the second current value and the third current value are larger, judging that the zinc oxide arrester valve plate is damaged; and if the first voltage value, the second voltage value and the third voltage value are respectively similar to the first current value, the second current value and the third current value, judging that the zinc oxide arrester valve plate is not damaged.
2. The nondestructive testing method for the zinc oxide arrester valve plate according to claim 1, wherein the experiment platform comprises a clamp and two metal electrodes, the two metal electrodes are respectively connected with a circuit, the two metal electrodes form two clamping portions of the clamp, and the zinc oxide arrester valve plate is arranged between the two clamping portions.
3. The nondestructive testing method for the zinc oxide arrester valve plate according to claim 2, wherein the direct-current high-voltage generator is connected with an upper computer through a communication line, and the programming control of the direct-current high-voltage generator is realized through the upper computer.
4. The nondestructive testing method for the zinc oxide arrester valve plate according to claim 3, wherein the voltage and current measurer is a dual-channel voltage and current measurer.
5. The nondestructive testing method for the zinc oxide arrester valve plate according to claim 4, wherein the sampling rate of the dual-channel voltage and current measuring instrument is at most 1MS/s, the sampling current measuring range is 10 μ A-3A, and the voltage measuring range is 100 mV-1000V.
6. The nondestructive testing method for the zinc oxide arrester valve plate according to claim 2, wherein the zinc oxide arrester valve plate is a double-sided non-aluminized valve plate, the two metal electrodes have opposite cross sections, and the two metal electrodes are respectively clamped on two opposite sides of the zinc oxide arrester valve plate.
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| CN202011152002.4A CN112326736B (en) | 2020-10-23 | 2020-10-23 | Nondestructive testing method for zinc oxide arrester valve plate |
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| CN202011152002.4A CN112326736B (en) | 2020-10-23 | 2020-10-23 | Nondestructive testing method for zinc oxide arrester valve plate |
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| CN112326736B true CN112326736B (en) | 2021-10-01 |
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| CN101246196A (en) * | 2008-03-24 | 2008-08-20 | 江苏省电力公司南京供电公司 | Double-segment zinc oxide lightning arrester insulation status testing method |
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| CN104950178A (en) * | 2015-06-29 | 2015-09-30 | 国网天津市电力公司 | Method for testing external insulation resistance of zinc oxide arrester from middle |
| CN108693434A (en) * | 2018-08-29 | 2018-10-23 | 深圳天溯计量检测股份有限公司 | A kind of Leakage Current of Zinc-oxide Lightning Arresters test device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0301980D0 (en) * | 2003-01-28 | 2003-02-26 | Natural Environment Res | Systems and methods for resistivity measurement |
| CA2585820A1 (en) * | 2007-04-18 | 2008-10-18 | Hydro-Quebec | Localizing faults on an electrical network using distributed voltage measurement |
| GB201120477D0 (en) * | 2011-11-28 | 2012-01-11 | Univ Nottingham | Fault location in power distribution systems |
| CN105044524B (en) * | 2015-08-10 | 2018-12-04 | 许继集团有限公司 | A kind of arrester monitoring method and system suitable for intelligent substation |
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- 2020-10-23 CN CN202011152002.4A patent/CN112326736B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246196A (en) * | 2008-03-24 | 2008-08-20 | 江苏省电力公司南京供电公司 | Double-segment zinc oxide lightning arrester insulation status testing method |
| CN101887073A (en) * | 2009-05-13 | 2010-11-17 | 武汉特试特电气有限公司 | High voltage power supply for direct current characteristics test of zinc oxide arrester |
| CN103884918A (en) * | 2014-03-10 | 2014-06-25 | 西安交通大学 | Method for detecting aging degree of zinc oxide lightning arrester resistor disc |
| CN104950178A (en) * | 2015-06-29 | 2015-09-30 | 国网天津市电力公司 | Method for testing external insulation resistance of zinc oxide arrester from middle |
| CN108693434A (en) * | 2018-08-29 | 2018-10-23 | 深圳天溯计量检测股份有限公司 | A kind of Leakage Current of Zinc-oxide Lightning Arresters test device |
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