CN107831410A - A kind of capacitive bottom shielding of bushing signal supervisory instrument - Google Patents
A kind of capacitive bottom shielding of bushing signal supervisory instrument Download PDFInfo
- Publication number
- CN107831410A CN107831410A CN201710883253.1A CN201710883253A CN107831410A CN 107831410 A CN107831410 A CN 107831410A CN 201710883253 A CN201710883253 A CN 201710883253A CN 107831410 A CN107831410 A CN 107831410A
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- metal shell
- low frequency
- signal
- end shield
- high frequency
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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
- G01R31/12—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
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- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention relates to a kind of capacitive bottom shielding of bushing signal supervisory instrument.There is installation inconvenience in existing device, signal attenuation is big, detection efficiency is low, the defects of potential safety hazard be present.The present invention includes the signal pickup assembly and signal processing apparatus of threaded connection.Signal pickup assembly includes the first metal shell, end shield terminals, high frequency partial discharge sensor and low frequency dielectric loss sensor, and end shield terminals are located in the first metal shell, and high frequency partial discharge sensor and low frequency dielectric loss sensor are nested with end shield terminals.Signal processing apparatus includes the second metal shell, high-frequency signal modulate circuit plate, low frequency signal modulate circuit plate, high frequency BNC connector, low frequency BNC connector, high-frequency signal modulate circuit plate and low frequency signal modulate circuit plate are arranged in the second metal shell, and BNC connector is arranged on the second metal shell.Shielding properties of the present invention is superior, and good in anti-interference performance is safe and reliable, can be long-term use of, effectively adapts to site environment.
Description
Technical field
The invention belongs to high pressure detection technique field, and in particular to a kind of capacitive bottom shielding of bushing signal supervisory instrument.
Background technology
Sleeve pipe failure is one of major reason for causing electrical equipment fault to have a power failure.The state of insulation master of detection sleeve pipe at present
If detected by traditional preventive trial, but the prerun test period is grown, it is difficult to find the potential event of operation middle sleeve in time
Barrier.In general, bottom shielding of bushing mainly has two kinds of structures, and one kind is external thread structure, and one kind is female thread structure, and both of which is led to
Cross bottom shielding of bushing ground connection lid reliable ground.
Sleeve pipe partial discharge detection mainly carries out high frequency Partial discharge signal collection by bottom shielding of bushing, has related personnel at present and grinds
Study carefully and a kind of device in bottom shielding of bushing collection signal, mainly change bottom shielding of bushing ground structure, extend bottom shielding of bushing ground connection
The modes such as line, gather the signals such as electric current, the phase of bottom shielding of bushing.There is installation inconvenience in existing device, signal attenuation is big, detects
Efficiency is low, the defects of potential safety hazard be present.
The content of the invention
The purpose of the present invention is aiming at the deficiencies in the prior art, there is provided a kind of capacitive bottom shielding of bushing signal supervisory instrument.
The present invention specific solution be：
Signal pickup assembly and signal processing apparatus including threaded connection.
Described signal pickup assembly includes the first metal shell, end shield terminals, high frequency partial discharge sensor and low frequency and is situated between
Damage sensor.
The first described metal shell and end shield terminals are cylindrical shape, and end shield terminals are located in the first metal shell,
System is integrally washed with the first metal shell；End shield terminals are connected with the first metal shell by connecting platform, and connecting platform is by end
Shield one end closing of terminals, toroidal cavity is formed between end shield terminals and the first metal shell.
The horizontal annular baffle plate of insulating materials is provided with toroidal cavity, toroidal cavity is divided into two by horizontal annular baffle plate
Space, high frequency partial discharge sensor and low frequency dielectric loss sensor are separately positioned in two spaces, and punching is nested with end shield wiring
On end；One end of coaxial cable for high frequency connects with high frequency partial discharge sensor, one end and the low frequency dielectric loss sensor of low frequency signal line
Connection.
The inwall on the top of the first metal shell is tapped with internal thread, and the outer wall of bottom is externally threaded；In end shield terminals
It is provided with the hat spring for fixed sleeving end shield exit.
Described signal processing apparatus includes the second metal shell, high frequency BNC connector, low frequency BNC connector, high-frequency signal and adjusted
Manage circuit board, low frequency signal modulate circuit plate；Horizontal baffle, the second metal shell and horizontal baffle are set in the second metal shell
The entirety system of washing；High frequency BNC connector and low frequency BNC connector are disposed side by side on horizontal baffle, and one end is set through horizontal baffle, are used
Analyzed in the signal transmission tremendously high frequency partial discharge detection instrument or relative dielectric loss measuring instrument for handling device well；Second metal shell
For the cylindrical shape of both ends open, the outer wall of its upper and lower part is externally threaded respectively.
The bottom of the second described metal shell is threadedly coupled with the top of the first metal shell, and the end face of connection is provided with
Sealing ring, forms cylindrical cavity after connection, high-frequency signal modulate circuit plate and low frequency signal modulate circuit plate are arranged on the circle
In cylindrical cavity；Another input for terminating at high-frequency signal modulate circuit plate of coaxial cable for high frequency, high-frequency signal conditioning electricity
The output end of road plate connects with the input of high frequency BNC connector；The another of low frequency signal line terminates at low frequency signal modulate circuit
The input of plate, the output end of low frequency signal modulate circuit plate connect with the input of low frequency BNC connector.
The top of grounded metal cap and the second metal shell can be threaded connection with.When covering, high frequency BNC connector and low frequency BNC
Joint connects with grounded metal cap.
In use, by the end shield terminals center inside the bottom shielding of bushing exit alignment signal collecting device of capacitive sleeve pipe
Insertion, by rotating ground connection screw thread bottom shielding of bushing exit and internal hat spring reliable contacts, the first metal shell and sleeve pipe
End shield ground connection lid is reliably connected so that bottom shielding of bushing exit is grounded cap-shaped into reliable earth-return circuit with bottom shielding of bushing, not
Most short grounding path is formed in the case of changing original earthing mode.
The present invention uses integrated sealing structure, and shielding properties is superior, good in anti-interference performance, and each component contact is reliable, energy
Ensure effective grounding, and oil resistant, solvent resistant and high-low temperature resistant, it is safe and reliable, can be long-term use of, effectively adapt to live ring
Border.And the device is equipped with scalable hat spring, have that applicability is good, pull out force is soft, contact resistance is small, conduct electricity very well, antidetonation, resistance to
Impact, the features such as stable connection is reliable, it can be suitably used for the bottom shielding of bushing exit of different structure size.Separately can be according to actual transformation
Device end shield size needs to match somebody with somebody screw thread modular converter, and the module replacing is convenient, and contact is reliable, can be suitably used for sizes size structure
Bottom shielding of bushing ground connection lid, have a wide range of application.Whole device does not change the original earthing mode of bottom shielding of bushing, and is not changing original
Most short grounding path is formed in the case of having earthing mode, easy for installation, signal attenuation is small.Special high frequency partial discharge passes built in device
Sensor and low frequency dielectric loss sensor, detect bandwidth, high sensitivity, and built-in special signal processing circuit, and detection efficiency is high.
Brief description of the drawings
Fig. 1 is detection means monnolithic case figure；
Fig. 2 is the structural representation of the present invention.
Embodiment
As shown in figure 1, a kind of capacitive bottom shielding of bushing signal supervisory instrument, include the He of signal pickup assembly 1 of threaded connection
Signal processing apparatus 2.
As shown in Fig. 2 signal pickup assembly 1 includes the first metal shell 1-1, end shield terminals 1-2, high frequency partial discharge sensing
Device 1-3 and low frequency dielectric loss sensor 1-4.
First metal shell 1-1 and end shield terminals 1-2 is cylindrical shape, and end shield terminals 1-2 is located at the first metal shell
In 1-1, system is integrally washed with the first metal shell 1-1；End shield terminals 1-2 and the first metal shell 1-1 pass through connecting platform 1-5
Connect, connecting platform 1-5 closes end shield terminals 1-2 one end, between end shield terminals 1-2 and the first metal shell 1-1
Form toroidal cavity.
Horizontal annular the baffle plate 1-6, horizontal annular baffle plate 1-6 that insulating materials is provided with toroidal cavity divide toroidal cavity
Into two spaces, high frequency partial discharge sensor 1-3 and low frequency dielectric loss sensor 1-4 are separately positioned in two spaces, and punching set
Put on end shield terminals 1-2.One end of coaxial cable for high frequency connects with high frequency partial discharge sensor 1-3, and the one of low frequency signal line
End is connected with low frequency dielectric loss sensor 1-4；
The inwall on the first metal shell 1-1 top is tapped with internal thread, and the outer wall of bottom is externally threaded；End shield terminals
The hat spring 1-7 for fixed sleeving end shield exit is provided with 1-2.
Signal processing apparatus 2 includes the second metal shell 2-1, high frequency BNC connector 2-2, low frequency BNC connector 2-3, high frequency letter
Number modulate circuit plate 2-4, low frequency signal modulate circuit plate 2-5.Horizontal baffle 2-6, the second gold medal are set in the second metal shell 2-1
Category housing 2-1 and horizontal baffle 2-6 integrally washes system；High frequency BNC connector 2-2 and low frequency BNC connector 2-3 be disposed side by side on it is horizontal every
On plate 2-6, one end through horizontal baffle 2-6 set, for device is handled well signal transmission tremendously high frequency partial discharge detection instrument or
Analyzed with respect to dielectric loss measuring instrument.Second metal shell 2-1 is the cylindrical shape of both ends open, and the outer wall of its upper and lower part divides
It is not externally threaded.
Second metal shell 2-1 bottom is threadedly coupled with the first metal shell 1-1 top, and the end face of connection is provided with
Sealing ring 4, forms cylindrical cavity after connection, high-frequency signal modulate circuit plate 2-4 and low frequency signal modulate circuit plate 2-5 are set
In the cylindrical empty intracavitary；Another input for terminating at high-frequency signal modulate circuit plate 2-4 of coaxial cable for high frequency, high frequency letter
Number modulate circuit plate 2-4 output end connects with high frequency BNC connector 2-2 input；Low frequency signal line it is another terminate at it is low
Frequency signal conditioning circuit plate 2-5 input, low frequency signal modulate circuit plate 2-5 output end are defeated with low frequency BNC connector 2-3's
Enter end to connect.
The top of grounded metal cap 3 and the second metal shell 2-1 be can be threaded connection with, and wiring work is not needed in BNC connector
When, grounded metal cap 3 is covered, as sealing waterproof, while the interference of maskable external signal.When covering, BNC connector is with connecing
Ground metal cap 3 connects, and is grounded BNC connector.
In work, if the end shield ground connection lid 5 of transformer is internal thread, the bottom shielding of bushing exit 6 of transformer is stretched into
End shield terminals 1-2, while the first metal shell 1-1 is directly threadedly coupled with end shield ground connection lid 5, you can start to test.Such as
The end shield ground connection lid 5 of fruit transformer is external screw thread, then connects the first metal shell 1-1 with end shield by internal and external threads bridgeware 7
Ground lid 5 is threadedly coupled.
The more springs of beryllium-bronze built in the hat spring of use simultaneously connect with twill, resilientiy stretchable are carried, suitable for sizes
Bottom shielding of bushing exit, and allow to plug, compared to plain clamp structure, have good applicability, high reliability, pull out force soft
With, contact resistance is small, conduct electricity very well, antidetonation, impact resistance, it is stable and firm the features such as.
High frequency partial discharge sensor uses special high frequency magnetic core, frequency band 10kHz-60MHz is detected, compared to common Roche line
Circle, possesses the advantages that detection bandwidth, high sensitivity.
Coaxial cable for high frequency uses special high-frequency signal transmission wire, the high frequency partial discharge that high frequency partial discharge sensor is detected
Signal is transferred to signal processing circuit and analyzed and processed, and transmission range is short, and signal attenuation is small.
High-frequency signal modulate circuit plate and low frequency signal modulate circuit plate are using low distortion, high-speed transitions, high sampling rate
Special Partial discharge signal process circuit, can directly to high frequency sensors output electric signal carry out signal modulation, amplification, A/D conversion,
Valid data extraction etc..
In use, the end shield terminals center by the bottom shielding of bushing exit alignment signal collecting inside modules of capacitive sleeve pipe
Insertion, by rotating ground connection screw thread bottom shielding of bushing exit and internal hat spring reliable contacts, the first metal shell and sleeve pipe
End shield ground connection lid is reliably connected so that bottom shielding of bushing exit is grounded cap-shaped into reliable earth-return circuit with bottom shielding of bushing, and leads to
The high frequency sensors detection high frequency Partial discharge signal that punching is enclosed on earth-return circuit is crossed, in the case where not changing original earthing mode
Form most short grounding path.
Claims (1)
1. a kind of capacitive bottom shielding of bushing signal supervisory instrument, include the signal pickup assembly (1) and signal processing device of threaded connection
Put (2)；It is characterized in that：
Described signal pickup assembly (1) includes the first metal shell (1-1), end shield terminals (1-2), high frequency partial discharge sensor
(1-3) and low frequency dielectric loss sensor (1-4)；
Described the first metal shell (1-1) and end shield terminals (1-2) is cylindrical shape, and end shield terminals (1-2) are located at first
In metal shell (1-1), with the overall system of washing of the first metal shell (1-1)；End shield terminals (1-2) and the first metal shell (1-
1) connected by connecting platform (1-5), connecting platform (1-5) closes one end of end shield terminals (1-2), end shield terminals
Toroidal cavity is formed between (1-2) and the first metal shell (1-1)；
The horizontal annular baffle plate (1-6) of insulating materials is provided with toroidal cavity, horizontal annular baffle plate (1-6) divides toroidal cavity
Into two spaces, high frequency partial discharge sensor (1-3) and low frequency dielectric loss sensor (1-4) are separately positioned in two spaces, and are worn
The heart is nested with end shield terminals (1-2)；One end of coaxial cable for high frequency connects with high frequency partial discharge sensor (1-3), low frequency letter
One end of number line is connected with low frequency dielectric loss sensor (1-4)；
The inwall on the top of the first metal shell (1-1) is tapped with internal thread, and the outer wall of bottom is externally threaded；End shield terminals
The hat spring (1-7) for fixed sleeving end shield exit is provided with (1-2)；
Described signal processing apparatus (2) includes the second metal shell (2-1), high frequency BNC connector (2-2), low frequency BNC connector
(2-3), high-frequency signal modulate circuit plate (2-4), low frequency signal modulate circuit plate (2-5)；Set in second metal shell (2-1)
Horizontal baffle (2-6), the second metal shell (2-1) and the overall system of washing of horizontal baffle (2-6)；High frequency BNC connector (2-2) and low frequency
BNC connector (2-3) is disposed side by side on horizontal baffle (2-6), and one end is set through horizontal baffle (2-6), for by device
The signal transmission tremendously high frequency partial discharge detection instrument or relative dielectric loss measuring instrument managed are analyzed；Second metal shell (2-1) is two
Open cylindrical shape is held, the outer wall of its upper and lower part is externally threaded respectively；
The bottom of described the second metal shell (2-1) is threadedly coupled with the top of the first metal shell (1-1), the end face of connection
Sealing ring (4) is provided with, cylindrical cavity, high-frequency signal modulate circuit plate (2-4) and low frequency signal conditioning electricity are formed after connection
Road plate (2-5) is arranged on the cylindrical empty intracavitary；The another of coaxial cable for high frequency terminates at high-frequency signal modulate circuit plate (2-4)
Input, the output end of high-frequency signal modulate circuit plate (2-4) connects with the input of high frequency BNC connector (2-2)；Low frequency is believed
Another input for terminating at low frequency signal modulate circuit plate (2-5) of number line, the output of low frequency signal modulate circuit plate (2-5)
End connects with the input of low frequency BNC connector (2-3)；
The top of grounded metal cap (3) and the second metal shell (2-1) can be threaded connection with, when covering, high frequency BNC connector (2-2)
Connect with low frequency BNC connector (2-3) with grounded metal cap (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710883253.1A CN107831410B (en) | 2017-09-26 | 2017-09-26 | Capacitive sleeve end screen signal detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710883253.1A CN107831410B (en) | 2017-09-26 | 2017-09-26 | Capacitive sleeve end screen signal detection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107831410A true CN107831410A (en) | 2018-03-23 |
| CN107831410B CN107831410B (en) | 2023-05-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710883253.1A Active CN107831410B (en) | 2017-09-26 | 2017-09-26 | Capacitive sleeve end screen signal detection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN107831410B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710005A (en) * | 2018-06-12 | 2018-10-26 | 广州供电局有限公司 | Dielectric loss partial discharge sensor structure and capacitive high-voltage electrical equipment testing agency |
| CN110568229A (en) * | 2019-09-10 | 2019-12-13 | 国网安徽省电力有限公司 | 220KV current transformer bushing end screen signal pickup device |
| CN111141961A (en) * | 2019-12-06 | 2020-05-12 | 国网冀北电力有限公司电力科学研究院 | Sensor and transformer bushing monitoring system |
| CN111722038A (en) * | 2020-06-18 | 2020-09-29 | 浙江省开化七一电力器材有限责任公司 | Shielding sleeve detection device |
| CN114167184A (en) * | 2021-12-06 | 2022-03-11 | 国网新疆电力有限公司电力科学研究院 | Sleeve and mutual inductor end screen online monitoring networking system and method based on Internet of things |
| WO2023217053A1 (en) * | 2022-05-07 | 2023-11-16 | 国网新疆电力有限公司电力科学研究院 | Multiple-in-one sensing apparatus for monitoring end screen of transformer bushing |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108710005A (en) * | 2018-06-12 | 2018-10-26 | 广州供电局有限公司 | Dielectric loss partial discharge sensor structure and capacitive high-voltage electrical equipment testing agency |
| CN110568229A (en) * | 2019-09-10 | 2019-12-13 | 国网安徽省电力有限公司 | 220KV current transformer bushing end screen signal pickup device |
| CN111141961A (en) * | 2019-12-06 | 2020-05-12 | 国网冀北电力有限公司电力科学研究院 | Sensor and transformer bushing monitoring system |
| CN111722038A (en) * | 2020-06-18 | 2020-09-29 | 浙江省开化七一电力器材有限责任公司 | Shielding sleeve detection device |
| CN111722038B (en) * | 2020-06-18 | 2022-11-29 | 浙江省开化七一电力器材有限责任公司 | Shielding sleeve detection device |
| CN114167184A (en) * | 2021-12-06 | 2022-03-11 | 国网新疆电力有限公司电力科学研究院 | Sleeve and mutual inductor end screen online monitoring networking system and method based on Internet of things |
| CN114167184B (en) * | 2021-12-06 | 2024-01-23 | 国网新疆电力有限公司电力科学研究院 | Sleeve and transformer end screen online monitoring networking system and method based on Internet of things |
| WO2023217053A1 (en) * | 2022-05-07 | 2023-11-16 | 国网新疆电力有限公司电力科学研究院 | Multiple-in-one sensing apparatus for monitoring end screen of transformer bushing |
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| Publication number | Publication date |
|---|---|
| CN107831410B (en) | 2023-05-30 |
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