CN112630696A - Capacitive screen coupling simulation testing device - Google Patents
Capacitive screen coupling simulation testing device Download PDFInfo
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- CN112630696A CN112630696A CN202011438146.6A CN202011438146A CN112630696A CN 112630696 A CN112630696 A CN 112630696A CN 202011438146 A CN202011438146 A CN 202011438146A CN 112630696 A CN112630696 A CN 112630696A
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- capacitive screen
- conducting rod
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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
- G01R31/62—Testing of transformers
-
- 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
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
-
- 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
-
- 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
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- 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
- G01R31/72—Testing of electric windings
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention relates to a capacitive screen coupling simulation test device, which comprises: the device comprises a conducting rod, a first capacitive screen, a second capacitive screen, a cylinder, a metal belt, a bracket, a pulse generator and a pulse detector; the first capacitive screen, the second capacitive screen, the cylinder and the conducting rod are coaxially arranged in sequence and are separated and fixed by insulating materials, and the pulse generator and the pulse detector are respectively connected with the leading-out conducting rod and the metal strip. The conductive rod, the first capacitive screen, the second capacitive screen and the cylinder are arranged to respectively simulate the sleeve conductive rod, the main capacitor, the end screen and the porcelain bushing; the metal belt analog coupling sensor is arranged, so that the signal transmission relation between metal belts with different widths and the conducting rod can be researched; the pulse generator and the pulse detector are arranged to simulate and analyze the transmission relationship of partial discharge and winding deformation fault signals. The invention has the advantages of simple structure, convenient installation, convenient measurement and the like, and can simulate the coupling sensor, the sleeve and the signal transmission relationship thereof.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a capacitive screen coupling simulation testing device.
Background
The transformer and the reactor are key equipment of a power grid transformer substation, when a fault occurs inside the transformer or a pulse method winding deformation test needs to be carried out on a transformer winding, a partial discharge signal or a pulse signal is detected through a tail screen generally, and with higher and higher requirements on equipment state perception and power failure, the online monitoring technology is more and more widely applied, and the equipment is required to be safely and reliably monitored under the condition of electrification. However, the transformation of the end screen not only needs power failure construction, which causes electric quantity loss and increases cost, but also easily causes the problems of inlet water wetting, aging, poor contact, discharging, wire breakage, inconvenient test and the like, and brings risks to the safe operation of equipment. The research of obtaining information on the lead by the principle of a coupling sensor or a coupling mutual inductor is a relatively new subject, in particular to the simulation research of capacitive screen coupling.
Disclosure of Invention
In view of the above problems, embodiments of the present invention provide a capacitive screen coupling simulation test apparatus, which is capable of simulating a coupling sensor, a sleeve and a signal transmission relationship between the coupling sensor and the sleeve.
In order to achieve the purpose, the invention adopts the following technical scheme:
a capacitive screen coupling simulation testing device comprises a conducting rod, a first capacitive screen, a second capacitive screen, a cylinder, a metal belt, a support, a pulse generator and a pulse detector; the conducting rod is arranged on the bracket; the first capacitive screen and the second capacitive screen are composed of a paper tube and an aluminum foil, and the aluminum foil is wound on the paper tube; the first capacitive screen, the second capacitive screen and the cylinder are coaxially arranged with the conducting rod in sequence and are separated and fixed by insulating materials; the first capacitive screen is suspended, the second capacitive screen is led out, the cylinder and the support are made of insulating materials, the pulse generator is connected with the conductive rod, and the pulse detector is connected with the metal belt.
The conducting rod is made of a copper pipe.
The conducting rod is made of an aluminum pipe.
The invention has the beneficial effects that:
1. the conductive rod, the first capacitive screen, the second capacitive screen and the cylinder are arranged to respectively simulate the sleeve conductive rod, the main capacitor, the end screen and the porcelain bushing, but the structure is simple, the installation is convenient and the measurement is convenient;
2. the metal belt analog coupling sensor is arranged, so that the signal transmission relation between metal belts with different widths and the conducting rod can be researched;
3. the pulse generator and the pulse detector are arranged to simulate and analyze the transmission relationship of partial discharge and winding deformation fault signals.
The invention has the advantages of simple structure, convenient installation, convenient measurement and the like, can simulate the transmission relationship between the coupling sensor and the sleeve and the signal thereof, and provides scientific basis for realizing non-contact measurement and improving the detection sensitivity.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a capacitive screen coupling simulation test apparatus in an embodiment of the present invention, wherein:
the labels shown in the figures are: 1: conductive rod, 2: first capacitive screen, 3: second capacitive screen, 4: cylinder, 5: metal strip, 6: support, 7: pulse generator, 8: pulse detector.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Fig. 1 shows a schematic structural diagram of a capacitive screen coupling simulation test device according to an embodiment of the present invention, which includes a conductive rod (1), a first capacitive screen (2), a second capacitive screen (3), a cylinder (4), a metal belt (5), a bracket (6), a pulse generator (7), and a pulse detector (8); the conducting rod (1) is arranged on the bracket (6); the first capacitive screen (2) and the second capacitive screen (3) are composed of a paper tube and an aluminum foil, and the aluminum foil is wound on the paper tube; the first capacitive screen (2), the second capacitive screen (3) and the cylinder (4) are sequentially and coaxially mounted with the conducting rod (1) and are separated and fixed by insulating materials; the first capacitive screen (2) is suspended, the second capacitive screen (3) is led out, the cylinder (4) and the support (6) are made of insulating materials, the pulse generator (7) is connected with the conducting rod (1), and the pulse detector (8) is connected with the metal belt (5).
The conducting rod (1) adopts a copper pipe; or the conducting rod (1) adopts an aluminum pipe.
The conducting rod is made of a copper pipe or an aluminum pipe, and the copper pipe or the aluminum pipe has excellent conducting and bending resistance.
The invention has the beneficial effects that:
1. the conductive rod, the first capacitive screen, the second capacitive screen and the cylinder are arranged to respectively simulate the sleeve conductive rod, the main capacitor, the end screen and the porcelain bushing, but the structure is simple, the installation is convenient and the measurement is convenient;
2. the metal belt analog coupling sensor is arranged, so that the signal transmission relation between metal belts with different widths and the conducting rod can be researched;
3. the pulse generator and the pulse detector are arranged to simulate and analyze the transmission relationship of partial discharge and winding deformation fault signals.
The invention has the advantages of simple structure, convenient installation, convenient measurement and the like, can simulate the transmission relationship between the coupling sensor and the sleeve and the signal thereof, and provides scientific basis for realizing non-contact measurement and improving the detection sensitivity.
Example two
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a capacitive screen coupling simulation test apparatus in an embodiment of the present invention, including a conductive rod 1, a first capacitive screen 2, a second capacitive screen 3, a cylinder 4, a metal strip 5, a bracket 6, a pulse generator 7, and a pulse detector 8; the conducting rod 1 is arranged on the bracket 6, and the conducting rod 1 adopts a copper pipe or an aluminum pipe; the first capacitive screen 2 and the second capacitive screen 3 are composed of a paper tube and an aluminum foil, and the aluminum foil is wound on the paper tube; the first capacitive screen 2, the second capacitive screen 3 and the cylinder 4 are coaxially arranged with the conductive rod 1 in sequence and are separated and fixed by insulating materials, preferably, the insulating materials are annular plastic blocks and are arranged at two ends in rows; the first capacitive screen 2 is suspended, the second capacitive screen 3 is led out, the cylinder 4 and the support 6 are made of insulating materials, preferably, the insulating materials of the cylinder 4 and the support 6 are epoxy resin, the pulse generator 7 and the pulse detector 8 are respectively connected with the conducting rod 1 and the metal strip 5, preferably, the model of the pulse generator 7 is XD56J, and the model of the pulse detector 8 is XD5102 EY.
When the pulse detector is used, the second capacitive screen 3 is led out to be grounded, the width of the metal strip 5 is selected or a plurality of metal strips 5 are sequentially arranged to form a wider metal strip and are connected, the power supply of the pulse detector 8 is turned on, the power supply of the pulse generator 7 is turned on, the amplitude and the frequency of pulses are selected, the amplitude and the frequency of the pulse detector 8 are observed, and data are recorded; by replacing the metal strip 5 of different width or by placing the metal strip 5 at different positions, the frequency and amplitude effects of the width and position of the metal strip 5 can be obtained by repeating the above steps. Furthermore, by varying the diameters of the first capacitive screen 2, the second capacitive screen 3 and the cylinder 4, bushings of different voltage levels can be simulated. Therefore, according to the above measurement results, it is possible to select a metal strip 5 of an appropriate width and its mounting position according to different voltage class bushings.
The conductive rod, the first capacitive screen, the second capacitive screen and the cylinder are arranged to respectively simulate the sleeve conductive rod, the main capacitor, the end screen and the porcelain bushing; the metal belt analog coupling sensor is arranged, so that the signal transmission relation between metal belts with different widths and the conducting rod can be researched; the pulse generator and the pulse detector are arranged to simulate and analyze the transmission relationship of partial discharge and winding deformation fault signals. The invention has the advantages of simple structure, convenient installation, convenient measurement and the like, and can simulate the coupling sensor, the sleeve and the signal transmission relationship thereof.
The above embodiments of the present invention are described in detail, and the principle and the implementation manner of the present invention should be described herein by using specific embodiments, and the above description of the embodiments is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (3)
1. The utility model provides a capacitive screen coupling simulation testing arrangement which characterized in that: the device comprises a conducting rod (1), a first capacitive screen (2), a second capacitive screen (3), a cylinder (4), a metal belt (5), a bracket (6), a pulse generator (7) and a pulse detector (8); the conducting rod (1) is arranged on the bracket (6); the first capacitive screen (2) and the second capacitive screen (3) are composed of a paper tube and an aluminum foil, and the aluminum foil is wound on the paper tube; the first capacitive screen (2), the second capacitive screen (3) and the cylinder (4) are sequentially and coaxially mounted with the conducting rod (1) and are separated and fixed by insulating materials; the first capacitive screen (2) is suspended, the second capacitive screen (3) is led out, the cylinder (4) and the support (6) are made of insulating materials, the pulse generator (7) is connected with the conducting rod (1), and the pulse detector (8) is connected with the metal belt (5).
2. The capacitive screen coupling simulation test device of claim 1, wherein: the conducting rod (1) is made of a copper pipe.
3. The capacitive screen coupling simulation test device of claim 1, wherein: the conducting rod (1) is an aluminum pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011438146.6A CN112630696B (en) | 2020-12-07 | 2020-12-07 | Capacitive screen coupling simulation testing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011438146.6A CN112630696B (en) | 2020-12-07 | 2020-12-07 | Capacitive screen coupling simulation testing device |
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| CN112630696A true CN112630696A (en) | 2021-04-09 |
| CN112630696B CN112630696B (en) | 2022-09-09 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484799A (en) * | 2021-06-17 | 2021-10-08 | 广西电网有限责任公司电力科学研究院 | Device and method for testing influence of coupling mutual inductor on operation of transformer bushing |
| CN113484798A (en) * | 2021-06-17 | 2021-10-08 | 广西电网有限责任公司电力科学研究院 | Simulation test device and method for selecting transformer bushing coupling sensor |
Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020180417A1 (en) * | 2001-04-02 | 2002-12-05 | Sentec Limited, A Great Britain Corporation | Current Sensor |
| KR100654040B1 (en) * | 2005-09-28 | 2006-12-05 | 매그나칩 반도체 유한회사 | Forming method of mim capacitor in image sensor |
| CN104215842A (en) * | 2013-06-03 | 2014-12-17 | 国家电网公司 | Sleeve based online transformer monitoring system |
| CN104714157A (en) * | 2015-02-04 | 2015-06-17 | 国家电网公司 | High-sensitivity spiral capacity coupling sensor and installing method thereof |
| CN105469958A (en) * | 2016-01-05 | 2016-04-06 | 北京中联科创高压电器有限公司 | High-current glue-impregnated fiber dry type capacitive type transformer bushing |
| CN205542212U (en) * | 2016-01-26 | 2016-08-31 | 北京天威瑞恒高压套管有限公司 | Exempt from insulating sleeve pipe of capacitanc of packing |
| CA2899351A1 (en) * | 2015-08-05 | 2017-02-05 | Henrique Matulis | Tangible user interfaces for touch systems without need of users capacitance |
| CN107613076A (en) * | 2016-07-12 | 2018-01-19 | 武星 | Gun shaped touch controller for electric capacity screen mobile phone |
| JP2018060887A (en) * | 2016-10-04 | 2018-04-12 | ローム株式会社 | Semiconductor integrated circuit device and screening method thereof and operational amplifier |
| CN109857284A (en) * | 2019-01-29 | 2019-06-07 | 晟光科技股份有限公司 | A kind of two-sided ITO film structure capacitive screen and preparation method thereof |
| CN110033933A (en) * | 2019-04-26 | 2019-07-19 | 江苏神马电力股份有限公司 | A kind of preparation method of bushing shell for transformer and bushing shell for transformer |
| CN110208637A (en) * | 2019-06-20 | 2019-09-06 | 国网天津市电力公司电力科学研究院 | A kind of isolated on-Line Monitor Device and its method of DC bushing end shield ground connection |
| CN110221141A (en) * | 2019-05-08 | 2019-09-10 | 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 change of current inversion of direct current casing overheating fault analog platform and method |
| CN209544034U (en) * | 2019-03-11 | 2019-10-25 | 江苏神马电力股份有限公司 | Capacitor core and bushing shell for transformer |
| CN209641511U (en) * | 2019-05-08 | 2019-11-15 | 国网陕西省电力公司咸阳供电公司 | A kind of current transformer preventing suspended voltage |
| CN110542838A (en) * | 2019-08-14 | 2019-12-06 | 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 | Destructive testing system and method for sleeve core with capacitive screen |
| CN110927620A (en) * | 2019-09-10 | 2020-03-27 | 重庆大学 | Sleeve with winding deformation and overvoltage on-line monitoring sensor |
| CN110967601A (en) * | 2019-11-21 | 2020-04-07 | 南京航空航天大学 | Transformer bushing partial discharge multidimensional detection method |
-
2020
- 2020-12-07 CN CN202011438146.6A patent/CN112630696B/en active Active
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020180417A1 (en) * | 2001-04-02 | 2002-12-05 | Sentec Limited, A Great Britain Corporation | Current Sensor |
| KR100654040B1 (en) * | 2005-09-28 | 2006-12-05 | 매그나칩 반도체 유한회사 | Forming method of mim capacitor in image sensor |
| CN104215842A (en) * | 2013-06-03 | 2014-12-17 | 国家电网公司 | Sleeve based online transformer monitoring system |
| CN104714157A (en) * | 2015-02-04 | 2015-06-17 | 国家电网公司 | High-sensitivity spiral capacity coupling sensor and installing method thereof |
| CA2899351A1 (en) * | 2015-08-05 | 2017-02-05 | Henrique Matulis | Tangible user interfaces for touch systems without need of users capacitance |
| CN105469958A (en) * | 2016-01-05 | 2016-04-06 | 北京中联科创高压电器有限公司 | High-current glue-impregnated fiber dry type capacitive type transformer bushing |
| CN205542212U (en) * | 2016-01-26 | 2016-08-31 | 北京天威瑞恒高压套管有限公司 | Exempt from insulating sleeve pipe of capacitanc of packing |
| CN107613076A (en) * | 2016-07-12 | 2018-01-19 | 武星 | Gun shaped touch controller for electric capacity screen mobile phone |
| JP2018060887A (en) * | 2016-10-04 | 2018-04-12 | ローム株式会社 | Semiconductor integrated circuit device and screening method thereof and operational amplifier |
| CN109857284A (en) * | 2019-01-29 | 2019-06-07 | 晟光科技股份有限公司 | A kind of two-sided ITO film structure capacitive screen and preparation method thereof |
| CN209544034U (en) * | 2019-03-11 | 2019-10-25 | 江苏神马电力股份有限公司 | Capacitor core and bushing shell for transformer |
| CN110033933A (en) * | 2019-04-26 | 2019-07-19 | 江苏神马电力股份有限公司 | A kind of preparation method of bushing shell for transformer and bushing shell for transformer |
| CN110221141A (en) * | 2019-05-08 | 2019-09-10 | 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 change of current inversion of direct current casing overheating fault analog platform and method |
| CN209641511U (en) * | 2019-05-08 | 2019-11-15 | 国网陕西省电力公司咸阳供电公司 | A kind of current transformer preventing suspended voltage |
| CN110208637A (en) * | 2019-06-20 | 2019-09-06 | 国网天津市电力公司电力科学研究院 | A kind of isolated on-Line Monitor Device and its method of DC bushing end shield ground connection |
| CN110542838A (en) * | 2019-08-14 | 2019-12-06 | 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 | Destructive testing system and method for sleeve core with capacitive screen |
| CN110927620A (en) * | 2019-09-10 | 2020-03-27 | 重庆大学 | Sleeve with winding deformation and overvoltage on-line monitoring sensor |
| CN110967601A (en) * | 2019-11-21 | 2020-04-07 | 南京航空航天大学 | Transformer bushing partial discharge multidimensional detection method |
Non-Patent Citations (2)
| Title |
|---|
| E.ANGELICO 等: "Capacitively coupled pickup in MCP-based photodetectors using a conductive metallic anode", 《NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH SECTION A: ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT》 * |
| 陈梁远 等: "110 kV及以上变压器套管常见缺陷和故障分析", 《广西电力》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113484799A (en) * | 2021-06-17 | 2021-10-08 | 广西电网有限责任公司电力科学研究院 | Device and method for testing influence of coupling mutual inductor on operation of transformer bushing |
| CN113484798A (en) * | 2021-06-17 | 2021-10-08 | 广西电网有限责任公司电力科学研究院 | Simulation test device and method for selecting transformer bushing coupling sensor |
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| CN112630696B (en) | 2022-09-09 |
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