CN107167717B - Partial discharge signal blocking device - Google Patents
Partial discharge signal blocking device Download PDFInfo
- Publication number
- CN107167717B CN107167717B CN201710593629.5A CN201710593629A CN107167717B CN 107167717 B CN107167717 B CN 107167717B CN 201710593629 A CN201710593629 A CN 201710593629A CN 107167717 B CN107167717 B CN 107167717B
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- Prior art keywords
- blocking
- partial discharge
- insulating
- insulating shell
- electrically connected
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- 230000000903 blocking effect Effects 0.000 title claims abstract description 72
- 238000001514 detection method Methods 0.000 claims abstract description 34
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 21
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 10
- 239000010949 copper Substances 0.000 claims abstract description 10
- 239000012212 insulator Substances 0.000 claims description 12
- 238000009413 insulation Methods 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000011324 bead Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention discloses a partial discharge signal blocking device, which comprises: the device comprises a stopper and an insulating guide rod, wherein the stopper comprises an insulating shell and a plurality of blocking bodies which are sequentially arranged in parallel and are mutually connected in series, the blocking bodies are wrapped by the insulating shell, and the blocking bodies comprise ferrite magnetic rings and wrapped copper wires wound on the ferrite magnetic rings; the insulating guide rod penetrates through the insulating shell and the blocking body, and is perpendicular to the blocking body; the input end of the wrapped copper wire close to the top wall of the insulating shell is electrically connected with a high-voltage lead-in terminal arranged on the insulating shell, and the high-voltage lead-in terminal is used for being electrically connected with the output end of the test power supply system; the output ends of all the wrapped copper wires are respectively and electrically connected with a high-voltage lead-out terminal arranged on the insulating shell, and the high-voltage lead-out terminal is used for being electrically connected with a detection loop consisting of high-voltage detection equipment and partial discharge detection impedance. The device solves the problem that the local discharge interference signals generated by the test power supply system in the local discharge test interfere with the detection result.
Description
Technical Field
The invention relates to the technical field of high-voltage electric tests, in particular to a partial discharge signal blocking device.
Background
Partial discharge refers to discharge which occurs between electrodes but does not penetrate the electrodes, and is a phenomenon that repeated breakdown or extinction occurs under the action of high electric field intensity due to weak points of insulation inside equipment or defects caused in the production process. With the continuous increase of the voltage of the power system, the partial discharge of high-voltage electric equipment such as a high-voltage transmission line and the like under the working voltage is an important cause of insulation aging and even breakdown of the high-voltage electric equipment. In the high-voltage electric test, the partial discharge test is an important means for checking the insulation state of the high-voltage electric equipment, and thus, the partial discharge detection of the high-voltage electric equipment has been clearly required in numerous standards or regulations.
At present, in the partial discharge test, as shown in fig. 1, an output end of a test power supply system 01 for generating alternating high voltage is directly and electrically connected with a detection loop consisting of a detected high voltage device 02 and a partial discharge detection impedance 03. The partial discharge detection impedance 03 transmits the collected partial discharge signal to analysis software, so that a partial discharge detection result of the high-voltage electrical equipment 02 to be detected is obtained in the analysis software.
However, since the test power supply system 01 is not normally a partial discharge system in the actual field test, this causes that in the partial discharge test, the test power supply system 01 may generate partial discharge interference signals, which are collected by the partial discharge detection impedance 03 together with the partial discharge signal of the measured high voltage electric device 02, and the partial discharge detection impedance 03 couples the collected partial discharge interference signals together with the partial discharge signal generated by the detected measured high voltage electric device 02 and then sends the coupled partial discharge interference signals to the analysis software, thereby causing inaccuracy in the partial discharge detection result of the measured high voltage electric device 02. Therefore, in the partial discharge test of the high-voltage electric power equipment, a partial discharge signal blocking device is required to remove the partial discharge disturbance signal generated by the test power supply system 01.
Disclosure of Invention
The invention provides a partial discharge signal blocking device, which is used for solving the problem of inaccurate detection results caused by partial discharge tests of high-voltage electric equipment which are disturbed by a test power supply system in the prior art.
The invention provides a partial discharge signal blocking device, which comprises: an occluder and an insulated guide rod, wherein,
the blocking device comprises an insulating shell and a plurality of blocking bodies which are sequentially arranged in parallel and are mutually connected in series, wherein the insulating shell wraps the blocking bodies, and the blocking bodies comprise ferrite magnetic rings and wrapped copper wires wound on the ferrite magnetic rings;
the insulating guide rod penetrates through the insulating shell and the blocking body, and is perpendicular to the blocking body;
the input end of the wrapped copper wire close to the top wall of the insulating shell is electrically connected with a high-voltage lead-in terminal arranged on the insulating shell, and the high-voltage lead-in terminal is used for being electrically connected with the output end of the test power supply system;
the output ends of all the wrapped copper wires are respectively and electrically connected with a high-voltage leading-out terminal arranged on the insulating shell, and the high-voltage leading-out terminal is used for being electrically connected with a detection loop consisting of detected high-voltage electric equipment and partial discharge detection impedance.
Preferably, the upper end and the lower end of the stopper are respectively provided with an equalizing ring, and the two equalizing rings are respectively and fixedly connected with the insulating guide rod.
Preferably, the apparatus further comprises a post insulator connected to one of the grading rings.
Preferably, the device further comprises a base for placing the post insulator and a movable wheel provided on the bottom surface of the base.
Preferably, the insulating housing is internally filled with insulating oil.
The technical scheme provided by the invention can comprise the following beneficial effects:
according to the partial discharge signal blocking device provided by the embodiment of the invention, through the design that the inside of the insulating shell of the blocking device is provided with the plurality of blocking bodies which are sequentially arranged in parallel and are mutually connected in series, and each blocking body comprises the ferrite magnetic ring and the wrapping copper wire wound on the ferrite magnetic ring, the blocking body is manufactured into a large inductance coil, and the principle characteristics of passing low frequency and blocking high frequency through the inductance are utilized to prevent high-frequency interference signals generated by partial discharge of a test power supply system from being collected by partial discharge detection impedance, so that the partial discharge signals collected by the partial discharge detection impedance are completely measured voltage electrical equipment, and the analysis result of an analysis element is more accurate. The device can realize the blocking effect of partial discharge high-frequency signals, solves the problem of interference of partial discharge interference signals generated by a test power supply system on detection results in partial discharge tests, has simple structure and simple and easy device, and meanwhile, the number of blocking bodies is selectively accessed, the number of the blocking bodies can be selected according to the needs, and the device is convenient and safe to operate by a single person.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic diagram of a partial discharge test apparatus according to the prior art;
FIG. 2 is a schematic view of a stopper according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an obstruction according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a partial discharge signal blocking device according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an application scenario of a partial discharge signal blocking device according to an embodiment of the present invention.
Detailed Description
An embodiment of the present invention provides a partial discharge signal blocking device, as shown in fig. 2, including: a stopper 1 and an insulated guide rod 2.
The stopper 1 comprises an insulating housing 11, inside which a plurality of blocking bodies 12 are arranged in series and parallel in sequence, the insulating housing 11 enveloping the blocking bodies 12.
As shown in fig. 3, the blocking bodies 12 each include a ferrite bead 121 and a copper wire 122 wound around the ferrite bead 121, and each copper wire 122 of the blocking body 12 has an input end and an output end. All the wrapped copper wires of the blocking body 12 inside the insulating housing 11 are connected in series in sequence.
In the specific implementation process, the blocking body 12 adopts a large aperture arrangement, a ferrite magnetic ring 121 is adopted to form a high inductance by wrapping copper wires, and the inductance coil has the characteristics of passing low frequency and blocking high frequency, so that the impedance voltage drop generated in the inductance by a high-frequency interference signal generated in the test power supply system 01 is large and cannot be output, the effect of preventing the output of the high-frequency interference signal is achieved, and the high-frequency interference signal generated in the test power supply system 01 cannot be output to a detection loop consisting of the measured high-voltage electrical equipment 02 and the partial discharge detection impedance 03, so that the aim that the local discharge detection impedance 03 cannot be acquired is achieved.
The insulating guide rod 2 is arranged perpendicularly to the blocking body 12 and penetrates the insulating housing 11 and the blocking body 12.
The insulating housing 11 is provided with a high-voltage lead-in terminal 3 and a plurality of high-voltage lead-out terminals 4, and the number of the high-voltage lead-out terminals 4 is the same as that of the blocking bodies 12.
The input end of the wrapped copper wire close to the top wall of the insulating shell 11 is electrically connected with the high-voltage introducing terminal 3, and the high-voltage introducing terminal 3 is used for being electrically connected with the output end of the test power supply system 01 during the partial discharge test. In a specific implementation process, the test power supply system 01 generally includes a power supply and a transformer, wherein a voltage generated by the power supply is converted into a high voltage by the transformer, and a high voltage output end of the transformer is electrically connected with the high voltage introducing terminal 3 of the stopper 1.
The output ends of the wrapped copper wires 122 of all the blocking bodies 12 are respectively electrically connected with a high-voltage lead-out terminal 4, and the high-voltage lead-out terminal 4 is used for being electrically connected with a detection loop consisting of the detected high-voltage equipment 02 and the partial discharge detection impedance 03. In the local discharge test site, the high-voltage leading-out terminals 4 can be selectively connected according to test requirements, namely the number of the blocking bodies 12 which are connected can be selected according to the requirements, so that the blocking effect on the local discharge high-frequency signals of the test power supply system 01 under various test working conditions, such as the blocking effect on the local discharge high-frequency signals of the test power supply system 01 under a plurality of different voltage test working conditions, and the like, can be realized.
In order to provide a good insulation between the blocking bodies 12 inside the stopper 1, the insulating housing 11 is filled with insulating oil 9.
In order to balance the electric field intensity of the high-voltage end part of the stopper and eliminate corona interference signals, equalizing rings 5 are respectively arranged at the upper end and the lower end of the stopper 1, and as shown in fig. 4, the two equalizing rings 5 are respectively fixedly connected with the insulating guide rod 2. In the specific implementation process, the equalizing ring 5 can be sleeved on the insulating guide rod 2, and the outer diameter of the equalizing ring 5 is larger than the outer diameter of the stopper 1.
The partial discharge signal blocking device in the embodiment of the invention is also provided with a post insulator 6, and the post insulator 6 is connected with a equalizing ring 5. In an embodiment, the post insulators 6 may be connected to a grading ring 5 provided at the lower end of the stopper 1. Specifically, the pillar insulator 6 and the equalizing ring 5 arranged at the lower end of the stopper 1 can be fastened and connected through the fixing bolts, on one hand, the pillar insulator 6 bears the insulating function of the device, and on the other hand, the pillar insulator can also support the stopper 1.
In order to facilitate the movement of the device, the device is further provided with a base 7 and a movable wheel 8 arranged on the bottom surface of the base 7, wherein the base 7 is used for placing the post insulator 6.
Fig. 5 is a schematic diagram of an application scenario of a partial discharge signal blocking device provided in an embodiment of the present invention, where the partial discharge signal blocking device is disposed between an output end of a test power supply system 01 and a detection loop formed by a detected high voltage electric device 02 and a partial discharge detection impedance 03 when a partial discharge test is performed, and in a specific implementation process, the output end of the test power supply system 01 is electrically connected with a high voltage lead-in terminal of the device blocker 1, and a high voltage lead-out terminal is electrically connected with the detection loop formed by the detected high voltage electric device 02 and the partial discharge detection impedance 03.
The embodiment of the invention provides a partial discharge signal blocking device, which comprises: the device comprises a blocking device and an insulating guide rod, wherein the blocking device comprises an insulating shell and a plurality of blocking bodies which are sequentially arranged in parallel and are mutually connected in series, the blocking body is wrapped by the insulating shell, and the blocking body comprises a ferrite magnetic ring and a wrapped copper wire wound on the ferrite magnetic ring; the insulating guide rod penetrates through the insulating shell and the blocking body, and is perpendicular to the blocking body; the input end of the wrapped copper wire close to the top wall of the insulating shell is electrically connected with a high-voltage lead-in terminal arranged on the insulating shell, and the high-voltage lead-in terminal is used for being electrically connected with the output end of the test power supply system; the output ends of all the wrapped copper wires are respectively and electrically connected with a high-voltage leading-out terminal arranged on the insulating shell, and the high-voltage leading-out terminal is used for being electrically connected with a detection loop consisting of detected high-voltage electric equipment and partial discharge detection impedance. According to the partial discharge signal blocking device provided by the embodiment of the invention, through the design that the inside of the insulating shell of the blocking device is provided with the plurality of blocking bodies which are sequentially arranged in parallel and are mutually connected in series, and each blocking body comprises the ferrite magnetic ring and the wrapping copper wire wound on the ferrite magnetic ring, the blocking body is manufactured into a large inductance coil, and the principle characteristics of passing low frequency and blocking high frequency through the inductance are utilized to prevent high-frequency interference signals generated by partial discharge of a test power supply system from being collected by partial discharge detection impedance, so that the partial discharge signals collected by the partial discharge detection impedance are completely measured voltage electrical equipment, and the analysis result of an analysis element is more accurate. The device can realize the blocking effect of partial discharge high-frequency signals, solves the problem of interference of partial discharge interference signals generated by a test power supply system on detection results in partial discharge tests, has simple structure and simple and easy device, and meanwhile, the number of blocking bodies is selectively accessed, the number of the blocking bodies can be selected according to the needs, and the device is convenient and safe to operate by a single person.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure of the invention herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
The embodiments of the present invention described above do not limit the scope of the present invention.
Claims (5)
1. A partial discharge signal blocking device, the device comprising: a stopper (1) and an insulated guide rod (2), wherein,
the blocking device (1) comprises an insulating shell (11) and a plurality of blocking bodies (12) which are sequentially arranged in parallel and are mutually connected in series, wherein the blocking bodies (12) are wrapped by the insulating shell (11), and the blocking bodies (12) comprise ferrite magnetic rings (121) and wrapped copper wires (122) wound on the ferrite magnetic rings (121);
the insulation guide rod (2) penetrates through the insulation shell (11) and the blocking body (12), and the insulation guide rod (2) is perpendicular to the blocking body (12);
the input end of the wrapped copper wire (122) close to the top wall of the insulating shell (11) is electrically connected with a high-voltage introducing terminal (3) arranged on the insulating shell (11), and the high-voltage introducing terminal (3) is used for being electrically connected with the output end of the test power supply system (01);
the output ends of all the wrapped copper wires (122) are respectively and electrically connected with a high-voltage lead-out terminal (4) arranged on the insulating shell (11), and the high-voltage lead-out terminal (4) is used for being electrically connected with a detection loop consisting of detected high-voltage electric equipment (02) and partial discharge detection impedance (03).
2. The device according to claim 1, wherein the upper end and the lower end of the stopper (1) are respectively provided with a equalizing ring (5), and the two equalizing rings (5) are respectively fixedly connected with the insulating guide rod (2).
3. The device according to claim 2, characterized in that it further comprises a post insulator (6), said post insulator (6) being connected to one of said grading rings (5).
4. A device according to claim 3, characterized in that the device further comprises a base (7) for placing the post insulators (6) and a movable wheel (8) arranged on the bottom surface of the base (7).
5. The device according to claim 1, characterized in that the insulating housing (11) is internally filled with insulating oil (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710593629.5A CN107167717B (en) | 2017-07-20 | 2017-07-20 | Partial discharge signal blocking device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710593629.5A CN107167717B (en) | 2017-07-20 | 2017-07-20 | Partial discharge signal blocking device |
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| CN107167717A CN107167717A (en) | 2017-09-15 |
| CN107167717B true CN107167717B (en) | 2024-02-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107167717B (en) * | 2017-07-20 | 2024-02-06 | 云南电网有限责任公司电力科学研究院 | Partial discharge signal blocking device |
| CN112946433A (en) * | 2021-01-29 | 2021-06-11 | 云南电网有限责任公司电力科学研究院 | Cubical switchboard partial discharge signal prevents diffusion equipment |
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Effective date of registration: 20191108 Address after: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Applicant after: ELECTRIC POWER RESEARCH INSTITUTE, YUNNAN POWER GRID Co.,Ltd. Address before: Yunda economic and Technological Development Zone in Yunnan province Kunming city 650217 West Road No. 105 Applicant before: ELECTRIC POWER RESEARCH INSTITUTE, YUNNAN POWER GRID Co.,Ltd. Applicant before: NANJING SUTE ELECTRIC Co.,Ltd. |
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