CN106501584A - Leakage Current of Zinc-oxide Lightning Arresters measuring method - Google Patents
Leakage Current of Zinc-oxide Lightning Arresters measuring method Download PDFInfo
- Publication number
- CN106501584A CN106501584A CN201611117419.0A CN201611117419A CN106501584A CN 106501584 A CN106501584 A CN 106501584A CN 201611117419 A CN201611117419 A CN 201611117419A CN 106501584 A CN106501584 A CN 106501584A
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- China
- Prior art keywords
- arrester
- direct current
- reading
- ammeter
- section arrester
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- 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
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
- G01R19/16571—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 comparing AC or DC current with one threshold, e.g. load current, over-current, surge current or fault current
-
- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The invention discloses a kind of Leakage Current of Zinc-oxide Lightning Arresters measuring method, comprises the following steps：The high-voltage output end of high voltage direct current generator is connected with " " terminals of the first DC ammeter, the "+" wiring of the first DC ammeter is connected to the junction of section arrester and lower section arrester, the voltage tester end of high voltage direct current generator is connected with DC microammeter, the end ground connection of high voltage direct current generator；Divider resistance of the resistance for 25k Ω～35k Ω is connected with the lower end of lower section arrester with after discharge counter parallel connection, the end ground connection of divider resistance；Connection of the lower section arrester with discharge counter is disconnected, starts high voltage direct current generator, when the reading of the first DC ammeter reaches 1mA, the reading of DC microammeter is the 1mA voltages of upper section arrester.The potential safety hazard that high-altitude disconnects high-voltage connection operation is present invention, avoiding, operating efficiency and measurement accuracy is improved.
Description
Technical field
The present invention relates to a kind of current measuring method, more particularly to a kind of Leakage Current of Zinc-oxide Lightning Arresters measuring method.
Background technology
Arrester, will be typically all kept away when carrying out preventive trial every year as installation number is more and place dispersion
Thunder device disconnecting lead, installing and using again after pass the test, detects the health condition of arrester by test, so not only time-consuming but also
Arduously, and in many cases, the transmission line of electricity high to electric pressure carry out when high-altitude disconnects high-voltage connection operation exist very
Big potential safety hazard.Conventional method of testing is to remove to check Zinc-Oxide Arrester (MOA) outward by the high-voltage connection of arrester
A lead and down conductor filthy and that clean, check Zinc-Oxide Arrester in time on surface, the safety for checking arrester
Distance, make regular check on insulating resistance value of arrester etc..This mode that takes out stitches from high-voltage connection, needs manually with the time all
Comparison is more, and since it is desired that high-altitude application, so there is very big potential safety hazard.
The measuring method of without disconnecting power lead has two-terminal-grounding method and upper underground screen method.Two-terminal-grounding method is in arrester to be measured
Line ball is increased in the junction of two section porcelain vases, and the other end of two section porcelain vases adds ground wire respectively, treats that digital display microampere meter indicates to reach 2000
During microampere, while measuring the 1mA DC reference voltage values of two sections.Two-terminal-grounding method shortcoming has：First, data accuracy is poor,
The shunt voltage value of two economize on electricitys resistance can only be read simultaneously, electric current can be caused to steeply rise when two sections are asynchronous to be punctured and be made measurement
Cannot carry out；Second, there is stealthy risk of equipment damage, economy is general；3rd, generalization is poor, can be only applied to
In 220kV test of lightning arrester, cannot use on 500kV test of lightning arrester.Upper underground screen method is in two section of arrester to be measured
Line ball is increased in the junction of porcelain vase, and upper section top adds ground wire, and lower section end is dismantled after ground wire plus shielding line, treats that digital display meter is indicated
Read when reaching 1000 microamperes and save 1mA DC reference voltage values.The shortcoming of upper underground screen method has：Instantly economize on electricity resistance is prior to upper
Section can cause electric current to steeply rise and measurement is carried out when puncturing.
Content of the invention
In view of this, it is an object of the invention to provide a kind of Leakage Current of Zinc-oxide Lightning Arresters measuring method, it is to avoid
High-altitude disconnects the potential safety hazard of high-voltage connection operation, improves operating efficiency and measurement accuracy.
The Leakage Current of Zinc-oxide Lightning Arresters measuring method of the present invention, comprises the following steps：
A：The high-voltage output end of high voltage direct current generator is connected with the "-" terminals of the first DC ammeter, first is straight
The "+" wiring of stream ammeter is connected to the junction of section arrester and lower section arrester, and the voltage of high voltage direct current generator is surveyed
Examination end is connected with DC microammeter, the end ground connection of high voltage direct current generator；
B：By resistance for 25k Ω～35k Ω divider resistance in parallel with discharge counter after with lower save arrester lower end
It is connected, the end ground connection of divider resistance；
C：Connection of the lower section arrester with discharge counter is disconnected, starts high voltage direct current generator, when the first direct current
When the reading of flow table reaches 1mA, the reading of DC microammeter is the 1mA voltages of upper section arrester；Then high direct voltage is sent out
The high-voltage output end of raw device discharges and adjusts output voltage, as the reading U on DC microammeter1It is equal to 75% upper section arrester
1mA voltages when, the reading I of the first DC ammeter1The leakage current I of as upper section arresteru；
D：After the leakage current of upper section arrester is determined, connection of the lower section arrester with divider resistance is disconnected, by second
The "-" terminals of DC ammeter are connected with the lower end of lower section arrester, the "+" terminals ground connection of the second DC ammeter；
E：Start high voltage direct current generator, when the reading of the second DC ammeter reaches 1mA, the reading of DC microammeter
The 1mA voltage of section arrester is as descended；Then the high-voltage output end of high voltage direct current generator is discharged and adjusts output voltage, when
Reading U on DC microammeter2During the 1mA voltages of the lower section arrester for being equal to 75%, the reading I of the second DC ammeter2As
The leakage current I of upper section arresterd.
Further, the divider resistance includes insulating cylinder, the valve element being located in insulating cylinder and is located at the company at insulating cylinder two ends
Connecting terminal, by multi-disc resistor disc, by organic conductive adhesive, along the axial direction of insulating cylinder, bonding is formed the valve element successively.
Further, the resistor disc is nonlinear resistance body structure.
Further, the outer surface of the resistor disc is provided with water-repellent layer.
Beneficial effects of the present invention：The Leakage Current of Zinc-oxide Lightning Arresters measuring method of the present invention, need not disconnect high pressure and draw
Line, it is to avoid high-altitude disconnects the potential safety hazard of high-voltage connection operation, improves operating efficiency；The setting of divider resistance improves down
Section lightning arrestor movement voltage, makes the electric current for flowing through lower section arrester very faint and can ignore, be not only convenient for the carrying out for measuring,
Measurement accuracy is improve, and lower section arrester is effectively prevented because hanging and powered, with higher measurement security；Pass through
The present invention can measure magnitude of voltage when upper and lower two sections arrester is 1mA by electric current, and measure in the case of 75% voltage
The value of leakage current, the leakage current that measurement income value is measured with the arrester delivery test is compared, you can verify that this is kept away
The state of thunder device.
Description of the drawings
The invention will be further described with reference to the accompanying drawings and examples：
Fig. 1 is the instrumentation plan for saving leakage current of an arrester in the measurement of the present invention；
Fig. 2 is the instrumentation plan for saving leakage current of an arrester under measurement of the invention；
Fig. 3 is the structural representation of the divider resistance of the present invention.
Specific embodiment
As shown in Figure 1 to Figure 3：The Leakage Current of Zinc-oxide Lightning Arresters measuring method of the present embodiment, comprises the following steps：
A：The high-voltage output end of high voltage direct current generator is connected with the "-" terminals of the first DC ammeter, first is straight
The "+" wiring of stream ammeter is connected to the junction of section arrester and lower section arrester, and the voltage of high voltage direct current generator is surveyed
Examination end is connected with DC microammeter, the end ground connection of high voltage direct current generator.
B：By resistance for 25k Ω～35k Ω divider resistance in parallel with discharge counter after with lower save arrester lower end
It is connected, the end ground connection of divider resistance；The setting of divider resistance improves lower section lightning arrestor movement voltage, makes to flow through lower section lightning-arrest
The electric current of device is very faint and can ignore, be not only convenient for measure carrying out, improve measurement accuracy, and effectively prevent down
Arrester is saved because hanging and powered, with higher measurement security；The divider resistance includes insulating cylinder 1, is located at insulating cylinder 1
In valve element and be located at the connection terminal at 1 two ends of insulating cylinder, the valve element passes through organic conductive adhesive edge by multi-disc resistor disc 2
Bonding is formed successively for the axial direction of insulating cylinder 1；The resistor disc 2 is nonlinear resistance body structure, to keep the characteristic with arrester
Unanimously, measurement accuracy is improved；The outer surface of the resistor disc 2 is provided with water-repellent layer, and water-repellent layer is mainly by the height containing hydrophobic group
Molecular compound is spun into, and hydrophobic group can for example be one or a combination set of fluorocarbon radical, silylation, to improve the moisture resistance energy of resistor disc 2
Power；During manufacture divider resistance, transformation is processed to insulating cylinder 1 according to 2 internal diameter size of resistor disc and desirable tablet number, first with heavily fortified point
Hard helical spring fixed spool, there is provided the tightening contact pressure of resistance and terminal, then using organosilicon sealant and sealing ring to exhausted
Edge cylinder 1 carries out encapsulation process, and fills insulating oil 3 in cylinder as interior insulation medium, constructs and carry out appearance insulating cylinder 1 is improved
After the shielding of face, at the two ends of insulating cylinder 1 respectively plus metal connecting plate to form the path of leakage current, while by electricity in two
Extremely each leading-out terminal facilitates field test wiring, is finally packaged.
C：Connection of the lower section arrester with discharge counter is disconnected, the suitable shelves of DC microammeter are selected as needed
Position, starts to measure after inspection apparatus, meter, test connection are correct；Start high voltage direct current generator, DC current passes through upper section
The valve block of arrester flows into the earth and constitutes loop, when the reading of the first DC ammeter reaches 1mA, DC microammeter with ground connection
Reading be the 1mA voltages of upper section arrester；Then the high-voltage output end of high voltage direct current generator is discharged and adjusts output
Voltage, as the reading U on DC microammeter1During the 1mA voltages of the upper section arrester for being equal to 75%, the reading of the first DC ammeter
Number I1The leakage current I of as upper section arresteru.
D：After the leakage current of upper section arrester is determined, connection of the lower section arrester with divider resistance is disconnected, by second
The "-" terminals of DC ammeter are connected with the lower end of lower section arrester, the "+" terminals ground connection of the second DC ammeter.
E：Start to measure after inspection apparatus, meter, test connection are correct；Start high voltage direct current generator, when second straight
When the reading of stream ammeter reaches 1mA, the reading of DC microammeter is the 1mA voltages of lower section arrester；Then high to direct current
The high-voltage output end of pressure generator discharges and adjusts output voltage, as the reading U on DC microammeter2The lower section for being equal to 75% is kept away
During the 1mA voltages of thunder device, the reading I of the second DC ammeter2The leakage current I of as upper section arresterd.
Finally illustrate, above example is only unrestricted in order to technical scheme to be described, although with reference to compared with
Good embodiment has been described in detail to the present invention, it will be understood by those within the art that, can be to the skill of the present invention
Art scheme is modified or equivalent, and without deviating from the objective and scope of technical solution of the present invention, which all should be covered at this
In the middle of the right of invention.
Claims (4)
1. a kind of Leakage Current of Zinc-oxide Lightning Arresters measuring method, it is characterised in that comprise the following steps：
A：The high-voltage output end of high voltage direct current generator is connected with the "-" terminals of the first DC ammeter, the first direct current
The "+" wiring of flow table is connected to the junction of section arrester and lower section arrester, the voltage tester end of high voltage direct current generator
It is connected with DC microammeter, the end ground connection of high voltage direct current generator；
B：Divider resistance of the resistance for 25k Ω～35k Ω is connected with the lower end of lower section arrester with after discharge counter parallel connection,
The end ground connection of divider resistance；
C：Connection of the lower section arrester with discharge counter is disconnected, starts high voltage direct current generator, when the first DC ammeter
Reading when reaching 1mA, the reading of DC microammeter is the 1mA voltages of upper section arrester；Then to high voltage direct current generator
High-voltage output end discharge and adjust output voltage, as the reading U on DC microammeter1Upper section arrester equal to 75%
During 1mA voltages, the reading I of the first DC ammeter1The leakage current I of as upper section arresteru；
D：After the leakage current of upper section arrester is determined, connection of the lower section arrester with divider resistance is disconnected, by the second direct current
The "-" terminals of ammeter are connected with the lower end of lower section arrester, the "+" terminals ground connection of the second DC ammeter；
E：Start high voltage direct current generator, when the reading of the second DC ammeter reaches 1mA, the reading of DC microammeter is
The 1mA voltages of lower section arrester；Then the high-voltage output end of high voltage direct current generator is discharged and adjusts output voltage, work as direct current
Reading U on microampere meter2During the 1mA voltages of the lower section arrester for being equal to 75%, the reading I of the second DC ammeter2As upper section
The leakage current I of arresterd.
2. Leakage Current of Zinc-oxide Lightning Arresters measuring method according to claim 1, it is characterised in that：The divider resistance
Including insulating cylinder, the valve element being located in insulating cylinder and the connection terminal at insulating cylinder two ends is located at, the valve element is by multi-disc resistor disc
By organic conductive adhesive, along the axial direction of insulating cylinder, bonding is formed successively.
3. Leakage Current of Zinc-oxide Lightning Arresters measuring method according to claim 2, it is characterised in that：The resistor disc is
Nonlinear resistance body structure.
4. Leakage Current of Zinc-oxide Lightning Arresters measuring method according to claim 3, it is characterised in that：The resistor disc
Outer surface is provided with water-repellent layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117419.0A CN106501584A (en) | 2016-12-07 | 2016-12-07 | Leakage Current of Zinc-oxide Lightning Arresters measuring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611117419.0A CN106501584A (en) | 2016-12-07 | 2016-12-07 | Leakage Current of Zinc-oxide Lightning Arresters measuring method |
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| CN106501584A true CN106501584A (en) | 2017-03-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201611117419.0A Pending CN106501584A (en) | 2016-12-07 | 2016-12-07 | Leakage Current of Zinc-oxide Lightning Arresters measuring method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037297A (en) * | 2017-06-15 | 2017-08-11 | 国网辽宁省电力有限公司锦州供电公司 | 220kV arresters exempt to tear the intelligent test method of high-voltage connection open |
| CN107894519A (en) * | 2017-12-01 | 2018-04-10 | 国网黑龙江省电力有限公司大庆供电公司 | 220kV and above more piece Zinc-Oxide Arrester integration test case |
| CN109324214A (en) * | 2018-11-22 | 2019-02-12 | 国网新疆电力有限公司电力科学研究院 | Combined arrester leakage current measurement device |
| CN110108923A (en) * | 2019-05-29 | 2019-08-09 | 国网青海省电力公司检修公司 | The test method of high-voltage connection measurement Zinc-Oxide Arrester direct current leakage is not removed |
| CN111856113A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Non-intrusive measurement method for true leakage current of zinc oxide arrester |
| CN111856114A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Lightning arrester leakage current testing system and method for eliminating parasitic parameter influence |
| CN111856115A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Intervention type measuring method for true leakage current of zinc oxide lightning arrester |
| CN112068029A (en) * | 2020-09-15 | 2020-12-11 | 国网河南省电力公司平顶山供电公司 | 6-10 kV lightning arrester leakage current measuring method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901309A (en) * | 2014-04-29 | 2014-07-02 | 国家电网公司 | Test method for high-voltage lead uncleared test device of 220-kV zinc oxide arrester |
| CN104049161A (en) * | 2014-05-20 | 2014-09-17 | 国家电网公司 | Testing connecting structure and testing method for substation field lightning arrester without demounting primary high-voltage lead |
-
2016
- 2016-12-07 CN CN201611117419.0A patent/CN106501584A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103901309A (en) * | 2014-04-29 | 2014-07-02 | 国家电网公司 | Test method for high-voltage lead uncleared test device of 220-kV zinc oxide arrester |
| CN104049161A (en) * | 2014-05-20 | 2014-09-17 | 国家电网公司 | Testing connecting structure and testing method for substation field lightning arrester without demounting primary high-voltage lead |
Non-Patent Citations (2)
| Title |
|---|
| 吴琦: "《用电检查》", 30 September 2010, 《北京：中国电力出版社》 * |
| 徐近龙: "《氧化锌避雷器现场直流试验的有关问题》", 《电气技术》 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037297A (en) * | 2017-06-15 | 2017-08-11 | 国网辽宁省电力有限公司锦州供电公司 | 220kV arresters exempt to tear the intelligent test method of high-voltage connection open |
| CN107894519A (en) * | 2017-12-01 | 2018-04-10 | 国网黑龙江省电力有限公司大庆供电公司 | 220kV and above more piece Zinc-Oxide Arrester integration test case |
| CN107894519B (en) * | 2017-12-01 | 2023-08-04 | 国网黑龙江省电力有限公司大庆供电公司 | 220kV and above voltage class multisection zinc oxide arrester comprehensive test box |
| CN109324214A (en) * | 2018-11-22 | 2019-02-12 | 国网新疆电力有限公司电力科学研究院 | Combined arrester leakage current measurement device |
| CN110108923A (en) * | 2019-05-29 | 2019-08-09 | 国网青海省电力公司检修公司 | The test method of high-voltage connection measurement Zinc-Oxide Arrester direct current leakage is not removed |
| CN111856113A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Non-intrusive measurement method for true leakage current of zinc oxide arrester |
| CN111856114A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Lightning arrester leakage current testing system and method for eliminating parasitic parameter influence |
| CN111856115A (en) * | 2020-06-24 | 2020-10-30 | 国网山东省电力公司淄博供电公司 | Intervention type measuring method for true leakage current of zinc oxide lightning arrester |
| CN112068029A (en) * | 2020-09-15 | 2020-12-11 | 国网河南省电力公司平顶山供电公司 | 6-10 kV lightning arrester leakage current measuring method |
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Application publication date: 20170315 |