CN114200222A - High-voltage direct-current transmission line space charge measuring device - Google Patents
High-voltage direct-current transmission line space charge measuring device Download PDFInfo
- Publication number
- CN114200222A CN114200222A CN202111354087.9A CN202111354087A CN114200222A CN 114200222 A CN114200222 A CN 114200222A CN 202111354087 A CN202111354087 A CN 202111354087A CN 114200222 A CN114200222 A CN 114200222A
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- Prior art keywords
- measuring
- transmission line
- space charge
- hole
- seat
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 8
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 238000009413 insulation Methods 0.000 claims description 9
- 239000012212 insulator Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 5
- 150000002500 ions Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002245 particle Substances 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
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
-
- 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
- G01R31/1263—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
A high-voltage DC transmission line space charge measuring device comprises an insulating seat, exhaust holes which are circumferentially arranged and radially extend are arranged on the insulating seat, an air inlet hole which is vertical and communicated with each exhaust hole is arranged in the center of the insulating seat, tubular measuring electrodes are arranged in each exhaust hole, a metal net and a fan are arranged on the inner wall of each measuring electrode from inside to outside, a sampling resistor which leads out of the insulating seat is connected to each measuring electrode through a lead, and a voltmeter is connected between the two ends of the resistor. In the process of measuring the space charge density, the influence of transverse wind is small, the fluctuation of measurement reading is small, and the measurement result is accurate.
Description
Technical Field
The invention relates to a space charge measuring device of a power transmission line, in particular to a space charge measuring device of a high-voltage direct-current power transmission line.
Background
Corona phenomenon is generated in the operation process of the high-voltage direct-current transmission line, and air molecules around the high-voltage direct-current transmission line are ionized into positive ions and negative ions to form space charge. The space charge is related to the discharge of the high-voltage direct-current transmission line and the charge characteristics of atmospheric particles under different environmental factors. In order to monitor the atmospheric particulate charge characteristics and the influence thereof on space charge, accurate measurement of space charge density is required.
The existing space charge measuring device is only provided with a horizontal air inlet and an air outlet, and is easily interfered by transverse wind in the measuring process, so that the fluctuation of the measured reading is large, and the measuring result is not accurate.
Disclosure of Invention
The invention aims to solve the technical problems and provides a high-voltage direct-current transmission line space charge measuring device which is slightly influenced by transverse wind, has small measurement reading fluctuation and accurate measurement result in the process of measuring the space charge density.
The technical solution of the invention is as follows:
the utility model provides a high-voltage direct current transmission line space charge measuring device, includes the insulating seat, its characterized in that: the insulation seat is provided with exhaust holes which are circumferentially arranged and radially extend, the center of the insulation seat is provided with an air inlet hole which is vertical and communicated with each exhaust hole, tubular measuring electrodes are arranged in each exhaust hole, a metal net and a fan are arranged on the inner wall of each measuring electrode from inside to outside, the measuring electrodes are connected with sampling resistors led out of the insulation seat through leads, and a voltmeter is connected between the two ends of each resistor.
Furthermore, a wind shield is covered and fastened on the top surface of the insulating base, the air inlet hole is led out from the top of the wind shield, the outer edge of the wind shield is bent downwards and shields the air exhaust hole, and side wind is prevented from blowing into the air exhaust hole to influence the measurement result.
Furthermore, a plate-shaped grounding electrode is arranged on the bottom surface of the insulating base, and the outer end of the resistor is connected with the grounding electrode.
Furthermore, the insulating seat is cross-shaped, the number of the exhaust pipes is four, and the exhaust pipes are located in the cross-shaped edges corresponding to the insulating seat.
The invention has the beneficial effects that:
the insulation seat is provided with air exhaust holes which are circumferentially arranged and radially extend, the center of the insulation seat is provided with a vertical air inlet hole communicated with the air exhaust holes, tubular measuring electrodes are arranged in the air exhaust holes, a metal net and a fan are arranged on the inner wall of each measuring electrode from inside to outside, the measuring electrodes are connected through leads to lead out a sampling resistor of the insulation seat, a voltmeter is connected between the two ends of the resistor, the air inlet holes are vertically downward, the air exhaust holes are circumferentially arranged and radially extend, the influence of transverse wind is small, the comprehensive measurement is realized through a measurement structure in the air exhaust holes, the measurement reading fluctuation is small, and the measurement result is accurate.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of FIG. 1;
in the figure: 1-insulating seat, 2-air outlet, 3-air inlet, 4-measuring electrode, 5-metal mesh, 6-fan, 7-grounding electrode, 8-sampling resistor, 9-voltmeter and 10-windshield.
Detailed Description
As shown in fig. 1 and 2, a space charge measuring device for a high-voltage direct-current transmission line comprises a cross-shaped insulating base 1, wherein radially extending air exhaust holes 2 are respectively arranged in each cross side of the insulating base 1, a vertical air inlet hole 3 communicated with each air exhaust hole 2 is arranged in the center of the insulating base 1, a tubular measuring electrode 4 is arranged in each air exhaust hole 2, a metal mesh 5 and a fan 6 are arranged on the inner wall of each measuring electrode 4 from inside to outside, a plate-shaped grounding electrode 7 is arranged on the bottom surface of the insulating base 1, a sampling resistor 8 is connected between the measuring electrode 4 and the grounding electrode 7, a voltmeter 9 is connected between two ends of the resistor, a wind shield 10 is covered on the top surface of the insulating base 1, the air inlet hole 3 is led out from the top of the wind shield 10, and the outer edge of the wind shield 10 is bent downwards and shields the air exhaust holes 2.
When the device is operated, firstly, the device for measuring the space charge of the high-voltage direct-current transmission line is placed on the ground of the space of the high-voltage direct-current transmission line to be measured, so that the measuring electrode 4 is conducted with the ground through the metal mesh 5, the sampling resistor 8 and the grounding electrode 7, then the fan 6 is started, the air in the space of the high-voltage direct-current transmission line to be measured sequentially passes through the air inlet hole 3 and the air outlet hole 2, the metal mesh 5 captures the charge in the air flowing through in the process that the air in the space of the high-voltage direct-current transmission line passes through the air outlet hole 2, the captured charge generates current between the measuring electrode 4 and the ground, the current value is obtained by dividing the voltage value displayed by the voltmeter 9 by the resistance value of the sampling resistor 8, and the charge density in the space of the high-voltage direct-current transmission line to be measured is calculated according to the current value.
The above description is only exemplary of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a HVDC transmission line space charge measuring device, includes the insulator foot, its characterized in that: the insulation seat is provided with exhaust holes which are circumferentially arranged and radially extend, the center of the insulation seat is provided with an air inlet hole which is vertical and communicated with each exhaust hole, tubular measuring electrodes are arranged in each exhaust hole, a metal net and a fan are arranged on the inner wall of each measuring electrode from inside to outside, the measuring electrodes are connected with sampling resistors led out of the insulation seat through leads, and a voltmeter is connected between the two ends of each resistor.
2. The device of claim 1 for measuring space charge on an hvdc transmission line, wherein: and a wind shield is covered and fastened on the top surface of the insulating base, the air inlet hole is led out from the top of the wind shield, and the outer edge of the wind shield is bent downwards and shields the air outlet hole.
3. The device of claim 1 for measuring space charge on an hvdc transmission line, wherein: and a plate-shaped grounding electrode is arranged on the bottom surface of the insulating base, and the outer end of the resistor is connected with the grounding electrode.
4. The device of claim 1 for measuring space charge on an hvdc transmission line, wherein: the insulating seat is cross, the exhaust pipe is four, the exhaust pipe is located the cross limit that insulating seat corresponds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111354087.9A CN114200222A (en) | 2021-11-13 | 2021-11-13 | High-voltage direct-current transmission line space charge measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111354087.9A CN114200222A (en) | 2021-11-13 | 2021-11-13 | High-voltage direct-current transmission line space charge measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114200222A true CN114200222A (en) | 2022-03-18 |
Family
ID=80647707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111354087.9A Pending CN114200222A (en) | 2021-11-13 | 2021-11-13 | High-voltage direct-current transmission line space charge measuring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114200222A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058649A (en) * | 1990-08-02 | 1992-02-12 | 任志刚 | Blast ELIMINATION OF ITS INTERFERENCE method and equipment therefor thereof |
| CN203490299U (en) * | 2013-08-29 | 2014-03-19 | 华北电力大学 | Space charge density measuring apparatus |
| CN105510854A (en) * | 2015-12-02 | 2016-04-20 | 中国电力科学研究院 | Device for calibrating space charge density measurement equipment |
| WO2017152692A1 (en) * | 2016-03-06 | 2017-09-14 | 淄博环能海臣环保技术服务有限公司 | Air purification electric fan |
| CN110763966A (en) * | 2019-11-21 | 2020-02-07 | 华北电力大学（保定） | Sand and dust weather simulation experiment system |
-
2021
- 2021-11-13 CN CN202111354087.9A patent/CN114200222A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1058649A (en) * | 1990-08-02 | 1992-02-12 | 任志刚 | Blast ELIMINATION OF ITS INTERFERENCE method and equipment therefor thereof |
| CN203490299U (en) * | 2013-08-29 | 2014-03-19 | 华北电力大学 | Space charge density measuring apparatus |
| CN105510854A (en) * | 2015-12-02 | 2016-04-20 | 中国电力科学研究院 | Device for calibrating space charge density measurement equipment |
| WO2017152692A1 (en) * | 2016-03-06 | 2017-09-14 | 淄博环能海臣环保技术服务有限公司 | Air purification electric fan |
| CN110763966A (en) * | 2019-11-21 | 2020-02-07 | 华北电力大学（保定） | Sand and dust weather simulation experiment system |
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