CN106383291B - Test wiring device and method for testing leakage current of lightning arrester on site - Google Patents
Test wiring device and method for testing leakage current of lightning arrester on site Download PDFInfo
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- CN106383291B CN106383291B CN201610852427.3A CN201610852427A CN106383291B CN 106383291 B CN106383291 B CN 106383291B CN 201610852427 A CN201610852427 A CN 201610852427A CN 106383291 B CN106383291 B CN 106383291B
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- lightning arrester
- leakage current
- shielding wire
- direct current
- insulating
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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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a test wiring device for testing leakage current of a lightning arrester on site, wherein an equalizing ring is arranged at the top of the lightning arrester and comprises an insulating rod, an insulating rope, a measuring shielding wire, a direct current generator and a leakage current tester, wherein the insulating rod, the insulating rope, the measuring shielding wire, the direct current generator and the leakage current tester are arranged at one side of the equalizing ring; the insulation rope is connected with the middle section of the measurement shielding wire through a fulcrum of the insulation rod, one end of the measurement shielding wire is connected to any flange arranged on the lightning arrester, the other end of the measurement shielding wire is connected with the high-voltage end of the direct current generator, and the grounding end of the direct current generator is connected with the leakage current tester through an optical fiber. The invention also discloses a test wiring method for testing the leakage current of the lightning arrester on site. The invention aims to provide a test wiring device and a test wiring method for testing leakage current of a lightning arrester on site, which solve the problem of large leakage current numerical deviation under direct current reference voltage and 0.75 time of direct current reference voltage, ensure the accuracy of on-site test, simultaneously have simple wiring, reduce the repeated line changing times and improve the test speed by 3-4 times.
Description
Technical Field
The invention relates to the technical field of field test of high-voltage electrical equipment, and belongs to a test wiring device and a test wiring method for field test of leakage current of a lightning arrester.
Background
The lightning arrester is one of the important electrical devices of the power system, and plays a very important role in the safe operation of the power system. In order to ensure that the lightning arrester can safely and reliably operate in a power system, a preventive test is required to be carried out on the lightning arrester according to the power industry standard DL/T596-1996 'preventive test procedure for electric equipment', wherein a field test DC reference voltage and a leakage current test under 0.75 times DC reference voltage are important test items for judging whether the lightning arrester is normal or not.
However, in the field test process, due to the influence of factors such as personnel, equipment, the position of the lightning arrester and the like, the test data are abnormal frequently when the lightning arrester is tested on site under the direct current reference voltage and the leakage current of 0.75 times of the direct current reference voltage, but the phenomenon that the lightning arrester is tested in a laboratory and is normal is removed, so that great inconvenience is brought to field maintenance. At present, the field test is judged by experience and historical data of testers, and a reliable test scheme is not available for solving the problem, so that a power grid operation party and equipment manufacturers are inconvenient and puzzled.
Disclosure of Invention
The invention aims to provide a test wiring device and a test wiring method for testing leakage current of a lightning arrester on site, which can solve the problem of large leakage current numerical deviation under direct current reference voltage and 0.75 time of direct current reference voltage, ensure the accuracy of on-site test, simultaneously have simple wiring, reduce the repeated line changing times and improve the test speed by 3-4 times.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a test wiring device for testing leakage current of a lightning arrester on site is characterized in that an equalizing ring is arranged at the top of the lightning arrester and comprises an insulating rod, an insulating rope, a measuring shielding wire, a direct current generator and a leakage current tester, wherein the insulating rod, the insulating rope, the measuring shielding wire, the direct current generator and the leakage current tester are arranged on one side of the equalizing ring;
the insulation rope is connected with the middle section of the measurement shielding wire through a fulcrum of the insulation rod, one end of the measurement shielding wire is connected to any flange arranged on the lightning arrester, the other end of the measurement shielding wire is connected with the high-voltage end of the direct current generator, and the grounding end of the direct current generator is connected with the leakage current tester through an optical fiber.
The test wiring device for testing the leakage current of the lightning arrester on site further comprises an insulation fixed pulley, wherein the insulation rope bypasses the insulation fixed pulley to be connected with the middle section of the measurement shielding wire, and the insulation fixed pulley is arranged at one end, far away from the lightning arrester, of the insulation rod.
The insulating rod is an insulating rod with adjustable length.
The included angle between the straight line of the measuring shielding line, where one end of the measuring shielding line is connected with the flange arranged on the lightning arrester, and the axial direction of the lightning arrester is 90 degrees.
A test wiring method for testing leakage current of a lightning arrester on site comprises the following steps:
step 2, one end of the insulating rope bypasses the insulating fixed pulley and then is connected with the measuring shielding wire, one end of the measuring shielding wire is fixed on any flange arranged on the lightning arrester, and the other end of the insulating rope is pulled to enable an included angle between a straight line of one end of the measuring shielding wire connected with the flange arranged on the lightning arrester and the axial direction of the lightning arrester to be 90 degrees;
and 3, connecting the other end of the measurement shielding wire with the high-voltage end of the direct current generator, and connecting the grounding end of the direct current generator with a leakage current tester through an optical fiber to measure the leakage current of the lightning arrester under the direct current reference voltage and the direct current reference voltage which is 0.75 times.
The invention has the beneficial effects that:
the invention provides a test wiring device and a test wiring method for testing leakage current of a lightning arrester on site under direct current reference voltage and 0.75 times of direct current reference voltage, which can solve the problem that the numerical deviation of the leakage current under the direct current reference voltage and the direct current reference voltage of 0.75 times is large by easily realizing the enlargement of the angle between a measuring shielding wire and the lightning arrester by bypassing an insulating rope on a fixed pulley, wherein the field test data is similar to laboratory test data, the error of the direct current reference voltage is less than 5 percent, and the error of the leakage current under the direct current reference voltage of 0.75 times is less than 15 mu A, thereby ensuring the accuracy of the field test; meanwhile, the wiring is simple, the repeated wire changing times are reduced, and the testing speed is improved by 3-4 times.
Drawings
FIG. 1 is a schematic diagram of a test wiring device for testing leakage current of a lightning arrester in situ;
wherein: 1. a flange; 2. equalizing rings; 3. an insulating rod; 4. an insulating fixed pulley; 5. an insulating rope; 6. measuring a shielding wire; 7. a direct current generator; 8. an optical fiber; 9. leakage current tester.
Detailed Description
The present invention will be described in further detail with reference to the drawings and detailed description.
Examples
Referring to fig. 1, a test wiring device for testing leakage current of a lightning arrester on site is provided with a grading ring 2 at the top of the lightning arrester, and comprises an insulating rod 3, an insulating fixed pulley 4, an insulating rope 5, a measuring shielding wire 6, a direct current generator 7 and a leakage current tester 9 which are arranged at one side of the grading ring 2, wherein the insulating fixed pulley 4 is arranged at one end of the insulating rod 3 far away from the lightning arrester. The length of the insulation rod 3 can be freely adjusted, and the length of the insulation rod 3 is adjusted according to different positions of the lightning arrester, so that the equalizing ring 2 on the lightning arrester is always fixedly connected with the insulation rod 3; one end of the insulating rope 5 bypasses the insulating fixed pulley 4 and then is connected with the measuring shielding wire 6 at a certain position of the measuring shielding wire 6, one end of the measuring shielding wire 6 is fixed on any flange 1 arranged on the lightning arrester, the other end of the measuring shielding wire 6 is connected with the high-voltage end of the direct-current generator 7, and the straight line where one end of the measuring shielding wire 6 connected with the flange 1 arranged on the lightning arrester is located and the axial included angle of the lightning arrester are about 90 degrees by pulling the other end of the insulating rope 5. The grounding end of the direct current generator 7 is connected with a leakage current tester 9 through an optical fiber 8, and the leakage current of the lightning arrester under the direct current reference voltage and the direct current reference voltage which is 0.75 times is measured.
A field test lightning arrester leakage current test wiring method comprises the following steps:
step 2, one end of the insulating rope 5 bypasses the insulating fixed pulley 4 and then is connected with the measuring shielding wire 6 at a certain position of the measuring shielding wire 6, one end of the measuring shielding wire 6 is fixed on any flange arranged on the lightning arrester, and the position of the connecting position of the insulating rope 5 and the measuring shielding wire 6 is driven by pulling the other end of the insulating rope 5, so that the angle between the axial direction of the lightning arrester and the angle of the measuring shielding wire 6 are controlled. When the angle between the measuring shielding wire 6 and the axial direction of the lightning arrester is enlarged, the leakage current value under the field test direct current reference voltage and the 0.75 times direct current reference voltage is not great with the error of laboratory test data. In the embodiment, the other end of the insulating rope 5 is pulled to control the included angle between the straight line of the end of the measuring shielding wire 6 connected with the flange arranged on the lightning arrester and the axial direction of the lightning arrester to be about 90 degrees;
and 3, connecting the other end of the measurement shielding wire 6 with the high-voltage end of the direct current generator 7, and connecting the grounding end of the direct current generator 7 with the leakage current tester 9 through the optical fiber 8 to measure the direct current reference voltage and the leakage current of the lightning arrester under the direct current reference voltage of 0.75 times.
In this embodiment, the leakage current value of the on-site test DC reference voltage and the 0.75 times DC reference voltage is very close to the laboratory test data, the error of the leakage current under the DC reference voltage is less than 5%, the error of the leakage current under the 0.75 times DC reference voltage is less than 15 μA, and the accuracy of the leakage current values under the on-site test DC reference voltage and the 0.75 times DC reference voltage is ensured
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or application to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (1)
1. A test wiring method for testing leakage current of a lightning arrester on site is characterized in that an equalizing ring (2) is arranged at the top of the lightning arrester, and the test wiring method comprises an insulating rod (3), an insulating rope (5), a measuring shielding wire (6), a direct current generator (7) and a leakage current tester (9) which are arranged on one side of the equalizing ring (2);
the insulation rope (5) is connected with the middle section of the measurement shielding wire (6) through a fulcrum of the insulation rod (3), one end of the measurement shielding wire (6) is connected to any flange (1) arranged on the lightning arrester, the other end of the measurement shielding wire is connected with the high-voltage end of the direct current generator (7), and the grounding end of the direct current generator (7) is connected with the leakage current tester (9) through an optical fiber (8);
the device also comprises an insulating fixed pulley (4), wherein an insulating rope (5) bypasses the insulating fixed pulley (4) and is connected with the middle section of the measuring shielding wire (6), and the insulating fixed pulley (4) is arranged at one end, far away from the lightning arrester, of the insulating rod (3); the insulation rod (3) is an insulation rod with adjustable length; the included angle between the straight line of the end of the measuring shielding wire (6) connected with the flange (1) arranged on the lightning arrester and the axial direction of the lightning arrester is 90 degrees; the method comprises the following steps:
step 1, installing an insulation rod (3) with adjustable length on an equalizing ring (2) at the top of a lightning arrester, installing an insulation fixed pulley (4) at one end of the insulation rod (3) far away from the lightning arrester, and adjusting the length of the insulation rod (3) according to the distance between the insulation rod (3) and the lightning arrester so as to ensure that the insulation rod (3) is fixedly connected with the equalizing ring (2);
step 2, one end of an insulating rope (5) bypasses an insulating fixed pulley (4) and then is connected with a measuring shielding wire (6), one end of the measuring shielding wire (6) is connected with any flange (1) arranged on the lightning arrester, and the other end of the insulating rope (5) is pulled to enable an included angle between a straight line of the end of the measuring shielding wire (6) connected with the flange (1) arranged on the lightning arrester and the axial direction of the lightning arrester to be 90 degrees;
and 3, connecting the other end of the measurement shielding wire (6) with the high-voltage end of the direct current generator (7), and connecting the grounding end of the direct current generator (7) with the leakage current tester (9) through the optical fiber (8) so as to measure the direct current reference voltage and the leakage current of the lightning arrester under the direct current reference voltage of 0.75 times.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610852427.3A CN106383291B (en) | 2016-09-26 | 2016-09-26 | Test wiring device and method for testing leakage current of lightning arrester on site |
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| CN201610852427.3A CN106383291B (en) | 2016-09-26 | 2016-09-26 | Test wiring device and method for testing leakage current of lightning arrester on site |
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| CN106383291B true CN106383291B (en) | 2023-05-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110618362A (en) * | 2019-10-15 | 2019-12-27 | 国网天津市电力公司 | High-voltage test device for lightning arrester of power transmission line |
| CN111521847A (en) * | 2020-05-20 | 2020-08-11 | 国家电网有限公司 | Lightning arrester direct current test wiring converter |
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| JPH06309973A (en) * | 1993-04-28 | 1994-11-04 | Sumitomo Wiring Syst Ltd | Method and device for feeding shielded electric wire |
| CN202421403U (en) * | 2012-01-16 | 2012-09-05 | 宁夏电力公司超高压分公司 | Direct current leakage test device for zinc oxide lightning arrester |
| CN203396788U (en) * | 2013-06-20 | 2014-01-15 | 国家电网公司 | Pressurization wire clamping tool for lightning arrester test |
| CN204142876U (en) * | 2014-09-11 | 2015-02-04 | 国家电网公司 | A kind of Leakage Current of Zinc-oxide Lightning Arresters measures servicing unit |
| CN105040755A (en) * | 2015-08-12 | 2015-11-11 | 河海大学 | Socketed pile model testing device based on transparent rock mass and using method of socketed pile model testing device |
| CN205353126U (en) * | 2016-02-24 | 2016-06-29 | 中国大唐集团科学技术研究院有限公司华中分公司 | Porcelain insulator surface leakage current shielding action bars |
| CN205506918U (en) * | 2015-07-16 | 2016-08-24 | 国家电网公司 | Multisection zinc oxide arrester leakage current measuring device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958351A (en) * | 2016-07-22 | 2016-09-21 | 国网河南省电力公司南阳供电公司 | Working method for reducing power outage time of transformer substation bus |
| CN206209028U (en) * | 2016-09-26 | 2017-05-31 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of test connection device of on-the-spot test lightning arrester leakance |
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2016
- 2016-09-26 CN CN201610852427.3A patent/CN106383291B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06309973A (en) * | 1993-04-28 | 1994-11-04 | Sumitomo Wiring Syst Ltd | Method and device for feeding shielded electric wire |
| CN202421403U (en) * | 2012-01-16 | 2012-09-05 | 宁夏电力公司超高压分公司 | Direct current leakage test device for zinc oxide lightning arrester |
| CN203396788U (en) * | 2013-06-20 | 2014-01-15 | 国家电网公司 | Pressurization wire clamping tool for lightning arrester test |
| CN204142876U (en) * | 2014-09-11 | 2015-02-04 | 国家电网公司 | A kind of Leakage Current of Zinc-oxide Lightning Arresters measures servicing unit |
| CN205506918U (en) * | 2015-07-16 | 2016-08-24 | 国家电网公司 | Multisection zinc oxide arrester leakage current measuring device |
| CN105040755A (en) * | 2015-08-12 | 2015-11-11 | 河海大学 | Socketed pile model testing device based on transparent rock mass and using method of socketed pile model testing device |
| CN205353126U (en) * | 2016-02-24 | 2016-06-29 | 中国大唐集团科学技术研究院有限公司华中分公司 | Porcelain insulator surface leakage current shielding action bars |
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