CN107861057B - Method for determining key parameters of disconnector for lightning arrester - Google Patents
Method for determining key parameters of disconnector for lightning arrester Download PDFInfo
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- CN107861057B CN107861057B CN201710929957.8A CN201710929957A CN107861057B CN 107861057 B CN107861057 B CN 107861057B CN 201710929957 A CN201710929957 A CN 201710929957A CN 107861057 B CN107861057 B CN 107861057B
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- disconnector
- arrester
- lightning arrester
- current
- leakage current
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000032683 aging Effects 0.000 claims abstract description 11
- 230000007774 longterm Effects 0.000 claims abstract description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 14
- 239000011787 zinc oxide Substances 0.000 claims description 7
- 150000003839 salts Chemical class 0.000 claims description 4
- 238000005259 measurement Methods 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000008367 deionised water Substances 0.000 description 4
- 229910021641 deionized water Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 230000001680 brushing effect Effects 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- 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
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
A method for determining key parameters of a disconnector for a lightning arrester comprises the following steps: (1) acquiring leakage current of the outer surface of the arrester under an extreme condition through a manual pollution test so as to determine long-term operation current of the disconnector for the arrester; (2) acquiring internal leakage current of the aged lightning arrester through a lightning impulse aging test; determining the minimum action current I of the disconnector for the lightning arrester by combining the external leakage current obtained by the artificial pollution test; i = k (I)Outer MAX+IInner part) Wherein, IOuter MAXThe continuous running current of the disconnector for the lightning arrester; i isInner partIs the internal leakage current of the aged lightning arrester. The invention confirms the continuous operation current of the disconnector for the lightning arrester by using the leakage current of the lightning arrester during the artificial pollution test, and confirms the minimum action current of the disconnector for the lightning arrester by combining the leakage current of the lightning arrester after the lightning impulse aging test. The key parameters of the disconnector for the lightning arrester can be effectively and accurately confirmed.
Description
Technical Field
The invention relates to a method for determining key parameters of a disconnector for an arrester, belonging to the technical field of arresters.
Background
The distribution network lightning arrester usually adopts a composite insulating material outer sleeve, is difficult to find from the appearance after a fault, is difficult to find a fault point, cannot be maintained in time, forms a continuous grounding fault, and is not beneficial to the economical and reliable operation of a power system. The disconnector is a matched device of the lightning arrester and is connected with the lightning arrester in series for use. When the lightning arrester has a fault, the lightning arrester is separated from the system, so that the lightning arrester is out of operation, and the continuous grounding fault of a power grid is prevented. And an obvious disconnection identifier is required to be left after the disconnector acts, so that a fault point can be conveniently and rapidly found, and the maintenance work of operators is reduced. However, the current technical standards for detachers are still very imperfect. The relevant standards such as national standard GB11032-2010 and DL/T1294-2013 use guide rules of the disconnector for the metal oxide lightning arrester of the alternating current power system only additionally provide some technical requirements of the disconnector. The two most important technical parameters (long-term running current and minimum action current) of the disconnector for the lightning arrester are only defined in the simplest way, the value of the two parameters is not determined, and even a specific description is not given on how to determine the two parameters.
Disclosure of Invention
The invention aims to solve the problem of value taking of key parameters of a disconnector for an arrester, and discloses a method for determining the key parameters of the disconnector for the arrester.
The technical scheme of the invention is as follows, a method for determining key parameters of a disconnector for an arrester comprises the following steps:
(1) obtaining external leakage current of the arrester under extreme conditions through a manual pollution test so as to determine long-term operation current of the disconnector for the arrester;
(2) the internal leakage current of the aged arrester is obtained through a lightning impulse aging test, and the minimum action current I of the disconnector for the arrester is determined by combining the external leakage current obtained through an artificial pollution test:
I=k（Iouter MAX+IInner part）
Wherein, IOuter MAXThe continuous running current of the disconnector for the lightning arrester; i isInner partThe internal leakage current of the aged lightning arrester is obtained; k is the safety margin of the minimum action current, namely the allowed value of the uncertainty of the total leakage current, and is mainly related to the operating environment of the lightning arrester; the k value was taken to be 1.5 during the experimental analysis.
The continuous operation current of the disconnector for the lightning arrester is the maximum value of the leakage current of the outer surface of the lightning arrester.
The artificial pollution test comprises the following steps:
(1) pre-treating a test sample: washing the test sample with deionized water, and placing the test sample in a dustproof container for airing;
(2) smearing the test sample: a quantitative brushing method is adopted;
(3) and (3) retesting the salt density and the ash density: randomly selecting a test article to test whether the density of the coated salt and the ash meet the requirements;
(4) and (3) pressure test: humidifying the test sample by using an artificial fog chamber, and pressurizing by adopting a constant pressure method;
(5) and (3) measuring leakage current: and detecting the leakage current by using a universal meter and a wave recorder.
The lightning impulse aging test refers to GB11032-2010, the residual voltage value of lightning current impulse of the zinc oxide lightning arrester is tested and recorded at intervals of 1 time for 1min every time, and the leakage current value of the lightning arrester under the condition that the zinc oxide lightning arrester is at normal temperature is measured after certain times of intervals.
The method has the advantages that the continuous operation current of the disconnector for the lightning arrester is confirmed by utilizing the leakage current of the lightning arrester during the artificial pollution test, and the minimum action current of the disconnector for the lightning arrester is confirmed by combining the leakage current of the lightning arrester after the lightning impulse aging test. The key parameters of the disconnector for the arrester can be effectively and accurately confirmed, reference is provided for the standard production and use of the disconnector for the arrester, and the disconnector for the arrester is suitable for popularization and application in a power system.
Drawings
FIG. 1 is a flow chart of the method of the present invention.
Detailed Description
A specific embodiment of the present invention is shown in fig. 1.
According to the method for determining the key parameters of the disconnector for the lightning arrester, the continuous operation current and the minimum action current of the disconnector for the lightning arrester are determined according to the leakage current of the lightning arrester by utilizing an artificial pollution test and a lightning impulse aging test.
As shown in figure 1, the specific operation steps of the artificial pollution test are as follows:
(1) pre-treating a test sample: and washing the insulating surface of the lightning arrester by using the deionized water to remove dirt on the lightning arrester, and placing the cleaned lightning arrester in a dustproof container to be dried for use.
(2) Smearing the test sample: and (3) calculating the required dosage of NaCl and kaolin required by each lightning arrester test sample by referring to a quantitative brushing method according to the insulating surface area of the lightning arrester test sample and the classified pollution grades, weighing the dosage of NaCl and kaolin by using an electronic balance, and respectively packaging by using clean test paper after weighing. Pouring the NaCl and kaolin wrapped by the test paper into a glass cup cleaned by deionized water, adding a proper amount of deionized water for dissolving, stirring by using a fine brush and completely brushing the solution on the surface of the lightning arrester test article. The sample is hung on a lightning arrester sample rack and is placed for 24 hours to wait for drying, and the sample is ready to be placed in an artificial fog room for pollution test.
(3) Retesting salt density and ash density: randomly selecting one lightning arrester test article after being smeared to measure whether the pollution degree meets the expected requirement.
(4) Pressurizing: and humidifying the pollution test room by using a steam generator, recording the temperature and the humidity of the field, and putting the pollution treated lightning arrester test sample into an artificial fog room to apply constant voltage when the humidity reaches 100%.
(5) Measurement of leakage current: and (3) recording instantaneous values of the leakage current of the lightning arrester at all times by using a wave recorder and a multimeter while applying voltage to the lightning arrester test sample.
The lightning impulse aging test refers to GB11032-2010, any appropriate lightning impulse current in the range of 0.01-2 times of nominal current can be selected, the apparent wave head time of the lightning impulse aging test is 7-9 mus, and the half peak time (without strict requirements) can have any deviation. In the test process, the residual voltage value of lightning current impact of the zinc oxide arrester is tested and recorded at an interval of 1 time for 1min every time, and the leakage current value of the arrester under the condition that the zinc oxide arrester is at normal temperature is measured after a certain number of intervals.
Fig. 1 is a flow chart showing the method of this embodiment. Obtaining leakage current I of the lightning arrester under different pollution degrees through manual pollution testOuter coverAnd at the maximum value I thereofOuter MAXAs the continuous running current of the disconnector for the lightning arrester; acquiring leakage current I of aged lightning arrester through lightning impulse aging testInner partAnd adding the current to the leakage current of the dirt to obtain the minimum action current I of the disconnector for the lightning arrester.
Claims (4)
1. A method for determining key parameters of a disconnector for a lightning arrester, characterized in that the method comprises the steps of:
(1) acquiring leakage current of the outer surface of the arrester under an extreme condition through a manual pollution test so as to determine long-term operation current of the disconnector for the arrester;
(2) acquiring internal leakage current of the aged lightning arrester through a lightning impulse aging test; determining the minimum action current I of the disconnector for the lightning arrester by combining the external leakage current obtained by the artificial pollution test;
I=k（Iouter MAX+IInner part）
Wherein, IOuter MAXThe continuous running current of the disconnector for the lightning arrester; i isInner partThe internal leakage current of the aged lightning arrester is obtained; k is the safety margin for the minimum action current, i.e. the allowed value for the total leakage current uncertainty.
2. The method for determining the key parameters of the disconnector for lightning arrester as claimed in claim 1, wherein the artificial pollution test comprises pretreatment of a test sample, smearing of the test sample, repeated measurement of salt density and ash density, pressurization test and leakage current measurement.
3. The method for determining the key parameters of the disconnector for the arrester as claimed in claim 1, wherein the residual voltage value of lightning current surge of the zinc oxide arrester is tested and recorded in the lightning surge aging test at 1-time interval of 1 impact; and measuring the leakage current value of the zinc oxide arrester under the condition that the zinc oxide arrester is at normal temperature after a certain number of times.
4. The method for determining the key parameter of the disconnector for arrester according to claim 1, wherein the continuous operation current of the disconnector for arrester is a maximum value of the leakage current of the outer surface of the disconnector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710929957.8A CN107861057B (en) | 2017-10-09 | 2017-10-09 | Method for determining key parameters of disconnector for lightning arrester |
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| CN201710929957.8A CN107861057B (en) | 2017-10-09 | 2017-10-09 | Method for determining key parameters of disconnector for lightning arrester |
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| CN107861057A CN107861057A (en) | 2018-03-30 |
| CN107861057B true CN107861057B (en) | 2020-08-11 |
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Citations (4)
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|---|---|---|---|---|
| EP0911937A2 (en) * | 1997-10-21 | 1999-04-28 | ABBPATENT GmbH | Test device for a fault current circuit breaker |
| CN2852338Y (en) * | 2005-10-24 | 2006-12-27 | 董立新 | Composite casing zinc oxide lightning arrester |
| US7199587B2 (en) * | 2001-11-13 | 2007-04-03 | Hurwicz Maxim D | Portable circuit interrupter tester and method |
| CN201877234U (en) * | 2010-12-12 | 2011-06-22 | 虞城县供电有限责任公司 | Detachable lightning arrester |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2785118Y (en) * | 2005-04-12 | 2006-05-31 | 西安电瓷研究所 | Failure indicator for circuit lightning arrester |
| CN200979828Y (en) * | 2006-09-25 | 2007-11-21 | 深圳市银星电力电子有限公司 | An extra high voltage and maintenance-free arrester for a transmission line |
| DE102007021190B4 (en) * | 2007-05-05 | 2014-10-23 | Obo Bettermann Gmbh & Co. Kg | Device for protecting data lines against overvoltages and arrangement |
| CN201207564Y (en) * | 2008-04-23 | 2009-03-11 | 西安安捷迅电气有限公司 | Protection device for transformer earthing |
| CN202678726U (en) * | 2012-06-29 | 2013-01-16 | 江苏正佰电气股份有限公司 | Intelligent lightning protection power distribution cabinet |
-
2017
- 2017-10-09 CN CN201710929957.8A patent/CN107861057B/en active Active
Patent Citations (4)
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|---|---|---|---|---|
| EP0911937A2 (en) * | 1997-10-21 | 1999-04-28 | ABBPATENT GmbH | Test device for a fault current circuit breaker |
| US7199587B2 (en) * | 2001-11-13 | 2007-04-03 | Hurwicz Maxim D | Portable circuit interrupter tester and method |
| CN2852338Y (en) * | 2005-10-24 | 2006-12-27 | 董立新 | Composite casing zinc oxide lightning arrester |
| CN201877234U (en) * | 2010-12-12 | 2011-06-22 | 虞城县供电有限责任公司 | Detachable lightning arrester |
Non-Patent Citations (3)
| Title |
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| 110kV整只氧化锌避雷器雷电冲击老化特性研究;林楚标 等;《南方电网技术》;20151231;正文第40页左栏第1段-第44页右栏倒数第1段 * |
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| CN107861057A (en) | 2018-03-30 |
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