CN105510646B - A kind of mode of connection of single-phase integral type power transformer automatic detection - Google Patents
A kind of mode of connection of single-phase integral type power transformer automatic detection Download PDFInfo
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- CN105510646B CN105510646B CN201510863968.1A CN201510863968A CN105510646B CN 105510646 B CN105510646 B CN 105510646B CN 201510863968 A CN201510863968 A CN 201510863968A CN 105510646 B CN105510646 B CN 105510646B
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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
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- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a kind of mode of connection of single-phase integral type power transformer automatic detection, it specifically includes the coherent detection long lead of casing high pressure leading-out terminal, 3 set pipe range cables that can share floor height pressure major insulation are assembled by the high, medium and low hierarchal grouping of winding voltage, every set pipe range cable is responsible for the lead set needed for two bushings detection of a certain voltage class leading to detection host and be connected；Every set pipe range cable being connect with detection host selects the effective main folder connection of a set close to detection host, then is connect from main folder casing tap wire and from folder with an other branch casing；It is another set an end shield and combine long cable one end each bushing is tapped into through bushing lead by end shield junction box do not shield, the other end, which draws, is connected to detection host.The present invention can improve the utilization ratio of high voltage insulation structure, reduce quantity, the weight of high-voltage connection, so as to reduce the workload of detection operation, labor intensity, 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 single-phase integral type 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.
Can above-mentioned coherent detection project 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 single-phase integral type power transformer automatic detection
Line method.
A kind of mode of connection of single-phase integral type power transformer automatic detection of the present invention, specific method are 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 two high pressures of a certain voltage class
Lead set needed for Casing Detection leads to detection host and connects；Every set pipe range cable being connect with detection host, selection
One set effective main folder connection close to detection host (being conducive to the long cable of reentrant bushing), then from main folder casing tap wire and
It is connect from folder with an other branch casing.
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；One semi-conductive tape of package outside core wire group, with
Improve the uniformity of high voltage electric field, improve 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 strengthen the shield effectiveness of inner shield net, which exists
In ground state during low pressure test (LPT), play electrostatic screen, apply 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, is provided simultaneously with tap function, other casings are connected by casing tap wire.
2) each bottom shielding of bushing lead assembles a long cable of the end shield that 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；One internal shield of package, the shielded layer are made of inner shield aluminium foil and inner shield net outside core wire group,
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 for connecing will be drawn, to be combined, by the long cable of end shield and ground host machine
Connection, and pass through end shield tap wire and clip is connect with bottom shielding of bushing.
Beneficial effects of the present invention：High-voltage isulation is born, the volume, weight to cable are very big, and the above method can be with
Improve the utilization ratio of high voltage insulation structure, reduce quantity, the weight of high-voltage connection, so as to reduce the workload of detection operation,
Labor intensity improves the quality of transformer correlation test.
Description of the drawings
Fig. 1 is the wiring schematic diagram of single-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 structure diagram；
Fig. 6 is casing tap wire structure diagram.
Specific embodiment
A kind of mode of connection of single-phase integral type power transformer automatic detection of the present invention, specific method are as follows：
As shown in Figure 1, Figure 3, it is 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 two bushings detection of grade leads to detection host and connects；Every set being connect with detection host
Pipe range cable, selects a set effective main folder connection close to detection host (being conducive to the long cable of reentrant bushing), then from main folder
It is connect with casing tap wire and from folder with an other branch casing.
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 employ 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 are carefully matched by one thick one, 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；One semi-conductive tape 3 of package, can change outside core wire group
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 strengthen the shield effectiveness of inner shield net, which exists
In ground state during low pressure test (LPT), play electrostatic screen, apply high pressure simultaneously with internal core in high pressure project, rise
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 detect the acquisition of stimulus for high pressure or apply power supply simultaneously, are not required to consider its through-flow energy
Power；One internal shield of package, the shielded layer are made of inner shield aluminium foil and inner shield net outside core wire group, 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.
As shown in fig. 6, main folder casing and the structure from the tap wire between jacketed pipe are, two core wires, core built in tap wire
One internal shield of line 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；Interior screen
Cover a layer outer wrapping restrictive coating.
Claims (4)
1. a kind of mode of connection of single-phase integral type 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 two bushings of a certain voltage class
Lead set needed for detection leads to detection host and connects；Every set pipe range cable being connect with detection host, selects one
It is connect close to the effective main folder connection of the set of detection host, then from main folder casing tap wire and from folder with an other branch casing；
2) it separately sets the long cable one end of end shield combination and each bushing is tapped into through bushing lead by end shield junction box
End shield, the other end, which draws, is connected to 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；Package half outside core wire group
Conductive strips can improve the uniformity of high voltage electric field, improve the voltage endurance capability of main insulating layer；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 strengthen the shield effectiveness of inner shield net,
The shielded layer, in ground state, applies high pressure, the shielded layer simultaneously in high pressure project in low pressure test (LPT) with internal core
Low-voltage insulation is formed with core wire；One main insulating layer of internal shield outer wrapping, dielectric strength, which presses highest insulation in detection project, to be 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 single-phase integral type power transformer automatic detection according to claim 1, feature
It is：8 core wires built in the long cable of end shield combination are consistent with bottom shielding of bushing quantity, and 8 core wire thicknesses are consistent, use simultaneously
The acquisition of stimulus is detected in high pressure or applies power supply simultaneously, is not required to consider its through-current capability；Outside core wire group in package one
Shielded layer, the shielded layer are made of inner shield aluminium foil and inner shield net, and low-voltage insulation is formed with core wire；Internal shield outer wrapping one
Main insulating layer, dielectric strength are needed to design by highest insulation in detection project；Wrap up an external shielding layer again outside main insulating layer,
External shielding layer wrap jacket layer again.
3. a kind of mode of connection of single-phase integral type power transformer automatic detection according to claim 1, feature
It is：1 core built in bushing lead, 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
Ensure the DC2500V pressure resistances of set pipe range cable；An external shielding layer is wrapped up again outside main insulating layer, in external shielding layer wrap jacket again
Layer.
4. a kind of mode of connection of single-phase integral type power transformer automatic detection according to claim 1, feature
It is：The end shield combines long cable, bushing lead and end shield junction box structure and all employs double shield structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510863968.1A CN105510646B (en) | 2015-11-30 | 2015-11-30 | A kind of mode of connection of single-phase integral type power transformer automatic detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510863968.1A CN105510646B (en) | 2015-11-30 | 2015-11-30 | A kind of mode of connection of single-phase integral type power transformer automatic detection |
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| Publication Number | Publication Date |
|---|---|
| CN105510646A CN105510646A (en) | 2016-04-20 |
| CN105510646B true CN105510646B (en) | 2018-06-12 |
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| CN201510863968.1A Active CN105510646B (en) | 2015-11-30 | 2015-11-30 | A kind of mode of connection of single-phase integral type power transformer automatic detection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AT522127B1 (en) * | 2019-01-24 | 2023-07-15 | Piezocryst Advanced Sensorics | CABLE ARRANGEMENT |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103698621A (en) * | 2013-09-05 | 2014-04-02 | 国家电网公司 | Vehicle-mounted transformer comprehensive test system |
| CN203720273U (en) * | 2014-02-28 | 2014-07-16 | 国家电网公司 | Transformer dielectric loss and insulation resistor tester |
-
2015
- 2015-11-30 CN CN201510863968.1A patent/CN105510646B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN103698621A (en) * | 2013-09-05 | 2014-04-02 | 国家电网公司 | Vehicle-mounted transformer comprehensive test system |
| CN203720273U (en) * | 2014-02-28 | 2014-07-16 | 国家电网公司 | Transformer dielectric loss and insulation resistor tester |
Non-Patent Citations (1)
| Title |
|---|
| 电力***中变压器自动检测技术研究;陈韦强;《机电信息》;20141231(第33期);第111-112页 * |
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