CN105510645B - A kind of mode of connection of Integral three-phase power transformer automatic detection - Google Patents
A kind of mode of connection of Integral three-phase power transformer automatic detection Download PDFInfo
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- CN105510645B CN105510645B CN201510861917.5A CN201510861917A CN105510645B CN 105510645 B CN105510645 B CN 105510645B CN 201510861917 A CN201510861917 A CN 201510861917A CN 105510645 B CN105510645 B CN 105510645B
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- shield
- detection
- end shield
- cable
- insulation
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Classifications
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- 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
- G01R1/02—General constructional details
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
-
- 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
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
Abstract
The invention discloses a kind of mode of connection of Integral three-phase power transformer automatic detection, it specifically includes the coherent detection long lead of casing high pressure leading-out terminal, the set pipe range cable that a floor height presses major insulation can be shared by assembling 3 by winding voltage hierarchal grouping, and the lead set that every set pipe range cable is responsible for needed for the bushing detection by a certain voltage class leads to detection host and connects；Connect with ground host machine every set pipe range cable, selects the effective main folder connection of a centrally located set, then from main folder casing tap wire and from folder and other casing connections；Each bottom shielding of bushing lead assembles the long cable of end shield that one can share major insulation, is tapped into each bottom shielding of bushing by end shield breakout box and end shield tap wire, the other end of the long cable of end shield, which draws, connects detection host.The present invention can improve the utilization ratio of high voltage insulation structure, reduce quantity, the weight of high-voltage connection, to reduce the labor intensity of detection operation, improve the quality of transformer correlation test.
Description
Technical field
The invention belongs to power measurement technical fields, and in particular to a kind of Integral three-phase power transformer automatic detection
Mode of connection.
Background technology
Power transformer is the core equipment of AC network, grasps power transformer performance, functional status and its change in time
Change, to ensureing the significant of power grid reliability service.
Presently relevant technical standard, specification, regulation, for power transformer require detection project, routinely have dielectric loss,
Insulation resistance, load ratio bridging switch switching characteristic, becomes when all items such as short-circuit impedance at winding D.C. resistance.Implement these detections
Project, it is not only time-consuming, laborious and also dangerous with certain operation.
Above-mentioned coherent detection project can be automatically performed by detection device by primary connection, undoubtedly to compression power grid examination
The power off time of detection is tested, detection efficiency is improved, reduces labor intensity and operation danger all with great significance.
It is widely different for the requirement for detecting lead in many detection projects of power transformer.Some requirement bear compared with
High voltage and has double shield performance, such as：Dielectric loss, insulation resistance project；Some requirements can bear larger current, such as：Directly
Leakage resistance project.Intuitively, mechanical method is：1~2 is connected in each terminals, disclosure satisfy that high voltage, checking of great current
Lead.The method needs more number of leads and connection times.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of connecing for Integral three-phase power transformer automatic detection
Line method.
The present invention is a kind of mode of connection of Integral three-phase power transformer automatic detection, and the specific method is as follows：
1) by the coherent detection long lead of casing high pressure leading-out terminal, 3 are assembled by the high, medium and low hierarchal grouping of winding voltage
Root can share the set pipe range cable of floor height pressure major insulation, and every set pipe range cable is responsible for three of a certain voltage class or four
Lead set needed for the detection of branch bushing leads to detection host and connects；Every set pipe range electricity being connect with ground host machine
Cable selects a centrally located casing (being conducive to shorten tap wire) to be connected with main folder, then is tapped from main folder with casing
Line and from folder with other casing connections.
Mutually 4 pairs of core wire groups of low-voltage insulation, each pair of core wire are carefully matched by one thick one built in the every set pipe range cable
It is right, low-voltage insulation between each core wire；For thick line mainly for detection of the application of power supply, through-current capability mainly considers the inspections such as D.C. resistance
The needs of survey project；Filament is used for signal acquisition, without the concern for through-current capability；A semi-conductive tape is wrapped up outside core wire group, with
The uniformity for improving high voltage electric field, improves the voltage endurance capability of main insulating layer；One internal shield of semi-conductive tape outer wrapping, the shielded layer
It is made of inner shield aluminium foil and inner shield net, wherein inner shield aluminium foil can reinforce the shield effectiveness of inner shield net, which exists
It is in ground state when low pressure test (LPT), plays electrostatic screen, applies high pressure simultaneously with internal core in high pressure project, rise etc.
The effect of potential screen, the shielded layer are low-voltage insulation with core wire group；One main insulating layer of internal shield outer wrapping, dielectric strength are pressed
Highest insulation needs to design in detection project, is at home 10kV；An external shielding layer is wrapped up again outside main insulating layer, in external shield
The outer wrap jacket layer again of layer.
The casing tap wire with set pipe range cable it is close, core wire be 1 pair, save the long cable of Decanning main insulating layer and
External shielding layer, directly outside internal shield plus sheath, tap wire are suspended between bushing shell for transformer.
The casing main folder should have certain structural strength, energy for connecting the set pipe range cable drawn from ground host machine
Set pipe range cable is hung up, tap function is provided simultaneously with, other casings are connected by casing tap wire.
2) each bottom shielding of bushing lead assembles the long cable of end shield that one can share major insulation, passes through end shield breakout box and end
Screen tap wire is tapped into each bottom shielding of bushing, and the other end of the long cable of end shield, which draws, connects detection host.
The core wire group of 8 core wires (consistent with bottom shielding of bushing quantity) built in the long cable of the end shield, for detecting signal
Acquisition or power supply apply；An internal shield is wrapped up outside core wire group, which is made of inner shield aluminium foil and inner shield net,
Low-voltage insulation is formed with core wire；One main insulating layer of internal shield outer wrapping, dielectric strength press highest in detection project and insulate
(DC2500V) it needs to design；Wrap up an external shielding layer again outside main insulating layer, the wrap jacket layer again outside external shielding layer.
The end shield tap wire is close with the long cable of end shield, and core wire is 1, considers that end shield insulation against ground resistance test needs
Ensure cable DC2500V pressure resistances, therefore in one main insulating layer of internal shield outer wrapping.
The end shield breakout box, which is responsible for that each bottom shielding of bushing connect will be drawn, to be combined, by the long cable of end shield and ground host machine
Connection, and connect with bottom shielding of bushing by end shield tap wire and clip.
Beneficial effects of the present invention：High-voltage isulation and double shield structure, it is very big to the volume of cable, weight, it is above-mentioned
Method can improve the utilization ratio of high-voltage isulation and double shield structure, reduce quantity, the weight of high-voltage connection, to reduce inspection
Workload, the labor intensity for surveying operation, improve the quality of transformer correlation test.
Description of the drawings
Fig. 1 is the wiring schematic diagram of three-phase integrated power transformer automatic detection；
Fig. 2 is set pipe range cable sectional view；
Fig. 3 is main jacketed pipe and the tap figure from jacketed pipe；
Fig. 4 is the long construction of cable schematic diagram of end shield；
Fig. 5 is end shield tap wire structural schematic diagram.
Specific implementation mode
A kind of mode of connection of Integral three-phase power transformer automatic detection of the present invention, the specific method is as follows：
As shown in Figure 1, Figure 3, high, medium and low etc. by winding voltage 1) by the coherent detection long lead of casing high pressure leading-out terminal
Grade grouping assembles 3 set pipe range cables that can share floor height pressure major insulation, and every set pipe range cable is responsible for a certain voltage
Lead set needed for three of grade or the detection of four bushings lead to detection host and connect；It is connect with ground host machine
Every set pipe range cable, selects the effective main folder connection of the set of one centrally located (be conducive to shorten tap wire), then from master
Folder casing tap wire and from folder and other casing connections, tap wire is suspended between bushing shell for transformer.
2) separately set the long cable one end of an end shield is tapped into each bottom shielding of bushing by end shield junction box through casing tap wire, separately
One end, which is drawn, is connected to detection host, because this group of line increases end shield insulation against ground resistance test, so the long cable of the end shield, end shield point
Wiring and end shield junction box structure all use double shield structure.
As shown in Fig. 2, the structure design of every set pipe range cable is：
4 pairs of core wire groups (consistent with casing quantity) of built-in mutual low-voltage insulation, each pair of core wire is by one thick one thin pairing, respectively
Low-voltage insulation between core wire；For thick line 1 mainly for detection of the application of power supply, through-current capability mainly considers the detections such as D.C. resistance
Purpose needs；Filament 2 is used for signal acquisition, without the concern for through-current capability；A semi-conductive tape 3 is wrapped up outside core wire group, can be changed
The uniformity of kind high voltage electric field, improves the voltage endurance capability of main insulating layer；One internal shield of semi-conductive tape outer wrapping, the shielded layer by
Inner shield aluminium foil 4 and inner shield net 5 form, and wherein inner shield aluminium foil can reinforce the shield effectiveness of inner shield net, which exists
It is in ground state when low pressure test (LPT), plays electrostatic screen, applies high pressure simultaneously with internal core in high pressure project, rises
The effect of equivalent potential screen, the shielded layer form low-voltage insulation with core wire；One main insulating layer 7 of internal shield outer wrapping, insulation are strong
Degree is needed to design by highest insulation in detection project, is at home 10kV；Wrap up an external shielding layer again outside main insulating layer, outside
Wrap jacket layer 8 again outside shielded layer.
As shown in figure 4, the structure of the long cable of end shield is：8 core wires are consistent with bottom shielding of bushing quantity built in the long cable of end shield,
8 core wire thicknesses are consistent, while applying for the acquisition of high pressure detection stimulus or simultaneously power supply, are not required to consider its through-flow energy
Power；An internal shield is wrapped up outside core wire group, which is made of inner shield aluminium foil and inner shield net, and low pressure is formed with core wire
Insulation；One main insulating layer of internal shield outer wrapping, dielectric strength are needed to design by highest insulation in detection project；In main insulating layer
An external shielding layer is wrapped up again outside, in external shielding layer wrap jacket layer again.
As shown in figure 5, the structure of wherein bushing lead is：1 core, core wire built in the casing leader cable of the end shield
One internal shield of outer wrapping, the shielded layer are made of inner shield aluminium foil and inner shield net, and low-voltage insulation is formed with core wire；Inner shield
Layer one main insulating layer of outer wrapping considers that end shield insulation against ground resistance test need to ensure cable DC2500V pressure resistances；In main insulating layer
An external shielding layer is wrapped up again outside, in external shielding layer wrap jacket layer again.
Claims (4)
1. a kind of mode of connection of Integral three-phase power transformer automatic detection, it is characterised in that：
1) by the coherent detection long lead of casing high pressure leading-out terminal, assembling 3 by the high, medium and low hierarchal grouping of winding voltage can
The set pipe range cable of shared floor height pressure major insulation, every set pipe range cable are responsible for three of a certain voltage class or four height
Lead set needed for pressure Casing Detection leads to detection host and connects；Every set pipe range cable being connect with detection host, choosing
Select the effective main folder connection of a centrally located set, then from main folder casing tap wire and from folder and other casing connections,
Tap wire is suspended between bushing shell for transformer；
2) each bottom shielding of bushing lead is assembled into the long cable of end shield that one can share major insulation, passes through end shield breakout box and end shield
Tap wire is tapped into each bottom shielding of bushing, and the other end of the long cable of end shield, which draws, connects detection host；
Mutually four pairs of core wire groups of low-voltage insulation, each pair of core wire are carefully matched by one thick one built in the set pipe range cable, each core
Low-voltage insulation between line；Thick line is mainly for detection of the application of power supply, and filament is for signal acquisition；Half is wrapped up outside core wire group
Conductive strips improve the voltage endurance capability of main insulating layer to improve the uniformity of high voltage electric field；One inner shield of semi-conductive tape outer wrapping
Layer, the shielded layer are made of inner shield aluminium foil and inner shield net, and wherein inner shield aluminium foil can reinforce the shield effectiveness of inner shield net,
The shielded layer is in ground state in low pressure test (LPT), applies high pressure simultaneously with internal core in high pressure project, the shielded layer
Low-voltage insulation is formed with core wire；One main insulating layer of internal shield outer wrapping, dielectric strength are pressed highest insulation in detection project and are needed
Design, is at home 10kV；Wrap up an external shielding layer again outside main insulating layer, the wrap jacket layer again outside external shielding layer.
2. a kind of mode of connection of Integral three-phase power transformer automatic detection according to claim 1, feature
It is：8 core wires built in the long cable of the end shield, acquisition or experiment power supply for detecting signal apply；Outside core wire group
An internal shield is wrapped up, which is made of inner shield aluminium foil and inner shield net, and low-voltage insulation is formed with core wire；Internal shield
One main insulating layer of outer wrapping, dielectric strength are needed to design by highest insulation in detection project；It is wrapped up outside one again outside main insulating layer
Shielded layer, in external shielding layer wrap jacket layer again.
3. a kind of mode of connection of Integral three-phase power transformer automatic detection according to claim 1, feature
It is：1 core built in end shield tap wire, one internal shield of core wire outer wrapping, the shielded layer is by inner shield aluminium foil and inner shield net
Composition forms low-voltage insulation with core wire；One main insulating layer of internal shield outer wrapping considers that end shield insulation against ground resistance test needs to protect
Demonstrate,prove the long cable DC2500V pressure resistances of end shield；An external shielding layer is wrapped up again outside main insulating layer, in external shielding layer wrap jacket layer again.
4. a kind of mode of connection of Integral three-phase power transformer automatic detection according to claim 1, feature
It is：Set pipe range cable, the long cable of end shield, casing tap wire, end shield tap wire and the end shield breakout box structure is all adopted
With double shield structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510861917.5A CN105510645B (en) | 2015-11-30 | 2015-11-30 | A kind of mode of connection of Integral three-phase power transformer automatic detection |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510861917.5A CN105510645B (en) | 2015-11-30 | 2015-11-30 | A kind of mode of connection of Integral three-phase power transformer automatic detection |
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| Publication Number | Publication Date |
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| CN105510645A CN105510645A (en) | 2016-04-20 |
| CN105510645B true CN105510645B (en) | 2018-09-07 |
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| CN108362945A (en) * | 2018-04-18 | 2018-08-03 | 广东电网有限责任公司 | A kind of bushing shell for transformer distal end power failure experimental rig and method |
| CN108535587B (en) * | 2018-04-19 | 2021-05-14 | 云南电网有限责任公司曲靖供电局 | Transformer wiring fault testing device |
| CN111413523B (en) * | 2019-03-27 | 2022-03-22 | 山东双益电气有限责任公司 | Automatic wiring robot for transformer measurement |
| CN111707887A (en) * | 2020-05-22 | 2020-09-25 | 国网河北省电力有限公司保定供电分公司 | Optimal scheme for routine test of power transformer |
| CN112666401B (en) * | 2020-12-15 | 2022-04-29 | 广东电网有限责任公司电力科学研究院 | Transformer insulating sleeve frequency domain dielectric spectrum field test device and method |
| CN113514669B (en) * | 2021-03-29 | 2024-03-12 | 杭州西湖电子研究所 | Wiring method for traction substation equipment detection |
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| CN102645563A (en) * | 2012-04-30 | 2012-08-22 | 山西省电力公司临汾供电分公司 | Testing connection wire of multifunctional transformer |
| CN103698621B (en) * | 2013-09-05 | 2016-08-17 | 国家电网公司 | A kind of transformer vehicular integrated test system |
| CN203720273U (en) * | 2014-02-28 | 2014-07-16 | 国家电网公司 | Transformer dielectric loss and insulation resistor tester |
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