CN108414894B - Travelling wave generating device and controllable travelling wave generating device - Google Patents
Travelling wave generating device and controllable travelling wave generating device Download PDFInfo
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- CN108414894B CN108414894B CN201810199936.XA CN201810199936A CN108414894B CN 108414894 B CN108414894 B CN 108414894B CN 201810199936 A CN201810199936 A CN 201810199936A CN 108414894 B CN108414894 B CN 108414894B
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- 230000005540 biological transmission Effects 0.000 claims abstract description 54
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
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- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 2
- 239000003063 flame retardant Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000012795 verification Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 5
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- 238000012544 monitoring process Methods 0.000 description 3
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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
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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Abstract
The invention provides a traveling wave generating device and a controllable traveling wave generating device. The device controls the potential of a plate electrode 22 relative to a transmission line lead 3 through a high-voltage normally closed relay 21, and a bar-shaped electrode 26 discharges to generate traveling waves when the plate electrode 22 and the transmission line lead 3 have potential difference; meanwhile, the pulse width and waveform amplitude of the generated traveling wave can be adjusted by changing the resistance value of the resistor 24. The invention solves the problem that no device capable of generating controllable transmission line traveling waves exists, realizes the effect of generating controllable traveling waves on the transmission line, and is beneficial to the analysis and verification of line discharge traveling wave data.
Description
Technical Field
The invention relates to the technical field of smart power grids, in particular to a traveling wave generating device and a controllable traveling wave generating device.
Background
Compared with the traditional impedance ranging method, the traveling wave method has the advantages of being less affected by system parameters, transition resistance, system operation modes, line loads and the like, so that the traveling wave method is widely applied to a power system. Besides being used for fault location, the traveling wave method can also be used for monitoring and early warning abnormal discharge of the power transmission line so as to reduce the occurrence of faults.
Because the attenuation and dispersion effects exist in the transmission process of the traveling wave, after the traveling wave is transmitted for a long distance, the waveform characteristics of the traveling wave are obviously changed, which brings adverse effects to the acquisition of the original waveform state and further analysis of the causes and formation mechanisms of faults or abnormal discharge.
From the present research and state of the art, no technique is available for generating a controllable transmission line travelling wave.
Disclosure of Invention
The invention provides a traveling wave generating device and a controllable traveling wave generating device, which at least solve the problem that no device capable of generating controllable transmission line traveling waves exists in the related art.
According to an aspect of the present invention, there is provided a traveling wave generating device, which is packaged in a housing of a flame retardant material, the traveling wave generating device comprising:
the input loop of the high-voltage normally closed relay 21 is connected with the traveling wave control device, one contact of the output loop of the high-voltage normally closed relay is electrically connected with the transmission line lead 3, and the other contact of the output loop of the high-voltage normally closed relay is electrically connected with the plate-shaped electrode 22;
the plate-shaped electrode 22 is arranged opposite to the transmission line lead 3;
the insulation limiting block 25 is arranged between the plate-shaped electrode 22 and the transmission line lead 3 and is tightly attached to the transmission line lead 3 through a plastic compression spring 23 arranged between the plate-shaped electrode 22 and the insulation limiting block 25;
a rod-shaped electrode 26 embedded in the insulation limiting block 25, wherein a tip-shaped end of the rod-shaped electrode points to the transmission line conductor 3 and keeps a gap with the transmission line conductor 3, and the rod-shaped electrode 26 is electrically connected with the plate-shaped electrode 22;
and a resistor 24 connected in series between the rod electrode 26 and the plate electrode 22.
Optionally, an aluminum foil 27 is wound on the surface of the power transmission line conductor 3 where the insulation limiting block 25 is attached to the power transmission line conductor 3.
Optionally, the plate-shaped electrode 22 is in a circular arc shape adapted to the outer surface of the power transmission line conductor 3.
Optionally, the resistor 24 is an adjustable resistor.
According to another aspect of the present invention, there is also provided a controllable traveling wave generation apparatus, comprising the traveling wave generation apparatus 2 and the traveling wave control apparatus 1 described above.
Optionally, the traveling wave control device 1 includes:
a battery 11;
a central control circuit 13;
the power management module 12 is electrically connected with the battery 11 and the central control circuit 13 respectively, and is electrically connected with an input loop of the high-voltage normally-closed relay 21;
and the wireless transmitting unit 14 is electrically connected with the central control circuit 13.
According to the traveling wave generating device and the controllable traveling wave generating device provided by the embodiment of the invention, the high-voltage normally-closed relay 21 is used for controlling the potential of the plate electrode 22 relative to the transmission line conductor 3, and the rod-shaped electrode 26 discharges electricity to generate traveling waves when the plate electrode 22 and the transmission line conductor 3 have potential difference; meanwhile, the pulse width and waveform amplitude of the generated traveling wave can be adjusted by changing the resistance value of the resistor 24. By the scheme, the problem that no device capable of generating controllable transmission line traveling waves exists is solved, the effect of generating the controllable traveling waves on the transmission line is achieved, and analysis and verification of line discharge traveling wave data are facilitated.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural diagram of a traveling wave generating apparatus according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a controllable traveling wave generation device according to an embodiment of the present invention.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
Example 1
In this embodiment, a traveling wave generating apparatus is provided, and fig. 1 is a schematic structural diagram of a traveling wave generating apparatus according to an embodiment of the present invention, and as shown in fig. 1, the traveling wave generating apparatus includes:
the input loop of the high-voltage normally closed relay 21 is connected with the traveling wave control device, one contact of the output loop of the high-voltage normally closed relay is electrically connected with the transmission line lead 3, and the other contact of the output loop of the high-voltage normally closed relay is electrically connected with the plate-shaped electrode 22;
the plate-shaped electrode 22 is arranged opposite to the transmission line lead 3;
the insulation limiting block 25 is arranged between the plate-shaped electrode 22 and the transmission line lead 3 and is tightly attached to the transmission line lead 3 through a plastic compression spring 23 arranged between the plate-shaped electrode 22 and the insulation limiting block 25;
a rod-shaped electrode 26 embedded in the insulation limiting block 25, wherein a tip-shaped end of the rod-shaped electrode points to the transmission line conductor 3 and keeps a gap with the transmission line conductor 3, and the rod-shaped electrode 26 is electrically connected with the plate-shaped electrode 22;
and a resistor 24 connected in series between the rod electrode 26 and the plate electrode 22.
Optionally, an aluminum foil 27 is wound on the surface of the power transmission line conductor 3 where the insulation limiting block 25 is attached to the power transmission line conductor 3, and the aluminum foil 27 is in equipotential connection with the power transmission line conductor 3. When the rod-shaped electrode 26 discharges, the aluminum foil 27 is preferentially discharged, and the transmission line lead 3 is effectively protected from being damaged by the discharge.
Optionally, the plate-shaped electrode 22 is in a circular arc shape adapted to the outer surface of the power transmission line conductor 3. The arc-shaped plate-shaped electrode 22 has larger area, so that the capacitance between the arc-shaped plate-shaped electrode and the transmission line lead 3 is increased, and more stable discharge is favorably formed.
In this embodiment, the front end of the rod-shaped electrode 26 is made into a sharp pointed shape, which is beneficial to generating discharge; the insulating stopper 25 is used for ensuring that the gap distance between the tip of the rod-shaped electrode 26 and the aluminum foil 27 is constant during installation, and preventing dimension errors caused by improper installation.
Example 2
In this embodiment, a controllable traveling wave generating apparatus is provided, and fig. 2 is a schematic structural diagram of the controllable traveling wave generating apparatus according to the embodiment of the present invention, as shown in fig. 2, the controllable traveling wave generating apparatus includes: the traveling-wave generation device 2 according to embodiment 1, further comprising: a traveling wave control device 1. The traveling wave control device 1 includes:
a battery 11;
a central control circuit 13;
the power management module 12 is electrically connected with the battery 11 and the central control circuit 13 respectively, and is electrically connected with an input loop of the high-voltage normally-closed relay 21;
and the wireless transmitting unit 14 is electrically connected with the central control circuit 13.
The traveling wave control device 1 performs remote communication with the system background central station through the wireless transmitting unit 14, receives a control command of the system background central station and outputs a corresponding signal. The traveling wave control device 1 is connected with the traveling wave generation device 2 through a twisted pair, and the state of the high-voltage relay 21 in the traveling wave generation device 2 can be accurately controlled by adjusting the output voltage and the waveform duty ratio of the traveling wave control device 1 through a remote control command.
The working flow of the controllable traveling wave generating device of the embodiment is as follows:
1) if no remote command is sent, the output voltage of the traveling wave control device 1 is 0, the normally closed high-voltage relay 21 in the traveling wave generation device 2 does not act, the contact of the traveling wave generation device 2 is kept in a normally closed state, at the moment, the plate-shaped electrode 22 (preferably a copper plate electrode), the rod-shaped electrode 26 and the transmission line lead 3 are connected in an equipotential manner through a normally closed node of the normally closed high-voltage relay 21, no voltage difference exists between the rod-shaped electrode 26 and the transmission line lead 3, no discharge occurs, and at the moment, no traveling wave is generated;
2) if a traveling wave needs to be generated, a remote control command is sent by a system background central station, so that the traveling wave control device 1 outputs a continuous or duty ratio-adjustable voltage (preferably 12V), at the moment, a normally closed high-voltage relay 21 in the traveling wave generation device 2 acts under the action of an input voltage, the output closed state of the normally closed high-voltage relay is changed into an open state, so that the arc-shaped plate-shaped electrode 22, the rod-shaped electrode 26 and the transmission line lead 3 are changed into a disconnected state from a connected state, the potential of the transmission line lead 3 is a normal operation voltage, the potentials of the copper plate 22 and the rod-shaped electrode 26 are in a suspension state, and at the moment. Because the front end of the rod-shaped electrode 26 is in a tip shape and the field intensity is strong, the front end of the rod-shaped electrode 26 discharges the aluminum foil 27 wound on the transmission line lead 3 and generates a discharge traveling wave to propagate to two sides along the transmission line lead 3;
in the traveling wave generating device and the controllable traveling wave generating device, the resistor 24 is changed, the time constant of the discharging loop can be changed, and finally the pulse width of the discharging traveling wave and the amplitude of the discharging waveform are changed, namely the traveling wave frequency and the amplitude are changed; the traveling wave on-line monitoring devices are arranged on two sides of the whole set of device according to different distances, traveling waves generated by the device can be obtained, the characteristic difference of the downstream waves at different transmission distances can be obtained through monitoring waveform comparative analysis, and finally the traveling wave transmission attenuation and dispersion characteristics are obtained.
In summary, the traveling wave generating device and the controllable traveling wave generating device provided by the embodiment of the invention can generate the traveling wave with controllable amplitude and frequency, and can provide a set of auxiliary tools for practical inspection for analyzing the transmission characteristics of the traveling wave of the power transmission line, thereby being beneficial to exploring the value of the traveling wave monitoring data of the power transmission line and improving the operation and maintenance management level of the line. At present, a controllable traveling wave generating device installed on a power transmission line and a related technology are not available, and the embodiment of the invention has the advantages of controllable traveling wave characteristics and freely controllable traveling wave generation.
The above description is only a preferred embodiment 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 (5)
1. A traveling wave generation device, characterized in that, the traveling wave generation device is packaged in a flame retardant material housing, the traveling wave generation device includes:
the input loop of the high-voltage normally closed relay (21) is connected with the traveling wave control device, one contact of the output loop of the high-voltage normally closed relay is electrically connected with the transmission line lead (3), and the other contact of the output loop of the high-voltage normally closed relay is electrically connected with the plate-shaped electrode (22);
the plate-shaped electrode (22) is arranged opposite to the transmission line lead (3);
the insulation limiting block (25) is arranged between the plate-shaped electrode (22) and the transmission line lead (3), and is tightly attached to the transmission line lead (3) through a plastic compression spring (23) arranged between the plate-shaped electrode (22) and the insulation limiting block (25); an aluminum foil (27) is wound on the surface of the power transmission line lead (3) at the position where the insulation limiting block (25) is tightly attached to the power transmission line lead (3);
the rod-shaped electrode (26) is embedded in the insulation limiting block (25), one end of the rod-shaped electrode points to the power transmission line lead (3) and keeps a gap with the power transmission line lead (3), and the rod-shaped electrode (26) is electrically connected with the plate-shaped electrode (22);
and a resistor (24) connected in series between the rod-like electrode (26) and the plate-like electrode (22).
2. The device according to claim 1, characterized in that the plate-shaped electrode (22) is in the shape of a circular arc adapted to the outer surface of the transmission line conductor (3).
3. The device according to claim 1, characterized in that the resistor (24) is an adjustable resistor.
4. A controllable travelling wave generating device, characterized in that it comprises a travelling wave generating device (2) and a travelling wave control device (1) according to any of claims 1 to 3.
5. The arrangement according to claim 4, characterized in that the travelling wave control arrangement (1) comprises:
a battery (11);
a central control circuit (13);
the power management module (12) is electrically connected with the battery (11) and the central control circuit (13) respectively and is electrically connected with an input loop of the high-voltage normally-closed relay (21);
and the wireless transmitting unit (14) is electrically connected with the central control circuit (13).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810199936.XA CN108414894B (en) | 2018-03-12 | 2018-03-12 | Travelling wave generating device and controllable travelling wave generating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810199936.XA CN108414894B (en) | 2018-03-12 | 2018-03-12 | Travelling wave generating device and controllable travelling wave generating device |
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| CN108414894A CN108414894A (en) | 2018-08-17 |
| CN108414894B true CN108414894B (en) | 2020-04-24 |
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| SU790149A1 (en) * | 1978-07-10 | 1980-12-23 | Предприятие П/Я Р-6511 | High-voltage strong square-wave generator |
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| CN1346053A (en) * | 2000-09-27 | 2002-04-24 | 清华大学 | Apparatus for particle operation and guide and use method thereof |
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| JP2010253698A (en) * | 2009-04-21 | 2010-11-11 | Seiko Epson Corp | Drive signal generating circuit, and fluid jetting apparatus |
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| CN107087339A (en) * | 2017-07-03 | 2017-08-22 | 李容毅 | A kind of enhanced microwave plasma torch generating means of two-chamber excitation |
| CN206788218U (en) * | 2017-05-26 | 2017-12-22 | 广西电网有限责任公司电力科学研究院 | A kind of partial discharge test zero standard signal generator |
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2018
- 2018-03-12 CN CN201810199936.XA patent/CN108414894B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU790149A1 (en) * | 1978-07-10 | 1980-12-23 | Предприятие П/Я Р-6511 | High-voltage strong square-wave generator |
| JPH055862A (en) * | 1991-06-28 | 1993-01-14 | Minolta Camera Co Ltd | Optical signal generator |
| CN1323100A (en) * | 2000-05-09 | 2001-11-21 | 西北核技术研究所 | Fast leading edge and high voltage square wave pulse generator |
| CN1346053A (en) * | 2000-09-27 | 2002-04-24 | 清华大学 | Apparatus for particle operation and guide and use method thereof |
| CN1652446A (en) * | 2005-01-21 | 2005-08-10 | 大连理工大学 | Ultra-low repeated frequency high-voltage rectangular pulse power supply |
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| CN201622340U (en) * | 2009-12-28 | 2010-11-03 | 上海佳能电力实业有限公司 | Device for generating electroscopic signals |
| CN104655979A (en) * | 2014-02-25 | 2015-05-27 | 中国南方电网有限责任公司超高压输电公司柳州局 | Method for generating failure travelling wave simulation signals |
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| CN107087339A (en) * | 2017-07-03 | 2017-08-22 | 李容毅 | A kind of enhanced microwave plasma torch generating means of two-chamber excitation |
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| CN108414894A (en) | 2018-08-17 |
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Effective date of registration: 20240412 Address after: Room 01, 8th Floor, Building 10, Dingjie Modern Electromechanical Information Incubation Park Phase 1, No. 219 Guanggu Second Road, Donghu New Technology Development Zone, Wuhan City, Hubei Province, 430000 Patentee after: Wuhan Three Phase Electrical Co.,Ltd. Country or region after: China Address before: 430074 No.1, 2, 3 and 4, 9 / F, unit 01, building 01 and 08, R & D headquarters phase II, No.3 Guanggu Avenue, Donghu New Technology Development Zone, Wuhan City, Hubei Province Patentee before: WUHAN SUNSHINE POWER SCIENCE & TECHNOLOGY Co.,Ltd. Country or region before: China |