CN105510645A - Wiring method for automatic detection of three-phase integrated-type power transformer - Google Patents
Wiring method for automatic detection of three-phase integrated-type power transformer Download PDFInfo
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- CN105510645A CN105510645A CN201510861917.5A CN201510861917A CN105510645A CN 105510645 A CN105510645 A CN 105510645A CN 201510861917 A CN201510861917 A CN 201510861917A CN 105510645 A CN105510645 A CN 105510645A
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- bushing
- voltage
- shield
- cable
- heart yearn
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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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- 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
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a wiring method for the automatic detection of a three-phase integrated-type power transformer, and the wiring method specifically comprises the steps: enabling related detection long lead wires of a high-voltage wire outgoing end of a bushing to be grouped and integrated into three bushing long cables according to a winding voltage level, wherein the three bushing long cables can share one high-voltage main insulating layer, and each bushing long cable is used for enabling lead wires needed by the detection of a high-voltage bushing at one voltage level to be integrated and guided to be connected with a detection host; firstly connecting each bushing long cable connected with a ground host with one middle bushing through a main clamp, and then connecting with other bushings through a main clamp bushing tapping wire and slave clamps; enabling tail screen lead wires of each bushing to be respectively integrated into one tail screen long cable, wherein the tail screen long cables can share one main insulating layer; enabling the tail screen long cables to be tapped to the corresponding bushing tail screens through a tail screen tapping junction box and a tail screen tapping wires; and enabling the other ends of the tail screen long cables to be tapped with the detection host. The method can improve the utilization efficiency of a high-voltage insulating structure, reduces the number and weight of high-voltage lead wires, reduces the workload and labor intensity of detection operation, and improves the quality of related testing of a transformer.
Description
Technical field
The invention belongs to power measurement technical field, be specifically related to a kind of mode of connection of Integral three-phase power transformer Aulomatizeted Detect.
Background technology
Power transformer is the nucleus equipment of AC network, grasps power transformer performance, functional status and change thereof in time, to ensureing the significant of electrical network reliability service.
Current Its Relevant Technology Standards, specification, code, require test item for power transformer, routine has all items such as dielectric loss, insulation resistance, winding D.C. resistance, load ratio bridging switch switching characteristic, no-load voltage ratio and short-circuit impedance.Implement these test items, not only time-consuming, effort and also to have certain operation dangerous.
Can primary connection be passed through, automatically complete above-mentioned coherent detection project by checkout equipment, undoubtedly to the power off time of compression electrical network testing inspection, improve detection efficiency, reduce labour intensity and operation danger all has very large meaning.
In the many test items of power transformer, widely different for the requirement detecting lead-in wire.Some requirement is born high voltage and possesses double shield performance, as: dielectric loss, insulation resistance project; Some requirement can bear larger current, as: direct current resistance project.Intuitively, the method for machinery is: connect 1 ~ 2 at each terminals, can meet high voltage, checking of great current lead-in wire.The method, needs more number of leads and connection times.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, propose a kind of mode of connection of Integral three-phase power transformer Aulomatizeted Detect.
The present invention is a kind of mode of connection of Integral three-phase power transformer Aulomatizeted Detect, and concrete grammar is as follows:
1) by the coherent detection long lead of casing high pressure leading-out terminal, assemble by the high, medium and low grade grouping of winding voltage the cover pipe range cable that 3 can be shared one deck high pressure major insulation, every root cover pipe range cable is responsible for the lead-in wire set needed for three of a certain electric pressure or four bushings detections to cause detect main frame and connect; The every root be connected with ground host machine overlaps pipe range cable, selects a sleeve pipe (being conducive to shortening a point wiring) being positioned at centre position to connect by main folder, then divides wiring to be connected with other sleeve pipes with from folder from main folder sleeve pipe.
4 pairs of heart yearn groups of the described built-in mutual low-voltage insulation of every root cover pipe range cable, often pair of heart yearn carefully matches by one thick one, low-voltage insulation between each heart yearn; Thick line is mainly for detection of the applying of power supply, and through-current capability mainly considers the needs of the test items such as direct current resistance; Fine rule is used for signals collecting, does not need to consider through-current capability; Wrap up a semi-conductive tape outside heart yearn group, to improve the homogeneity of high-voltage electric field, improve the voltage endurance capability of main insulating layer; Semi-conductive tape outer wrapping one internal shield, this screen layer is made up of inner screening aluminium foil and inner screening net, wherein inner screening aluminium foil can strengthen the shield effectiveness of inner screening net, this screen layer is in ground state when low pressure test (LPT), play electrostatic screening effect, when high pressure project and internal core apply high pressure simultaneously, play equivalent potential screen, this screen layer and heart yearn group are low-voltage insulation; Internal shield outer wrapping one main insulating layer, dielectric strength needs design by insulation the highest in test item, is 10kV at home; An external shielding layer is wrapped up again outward, at the outer wrap jacket layer again of external shielding layer at main insulating layer.
Described sleeve pipe divides wiring close with cover pipe range cable, and heart yearn is 1 right, and economize main insulating layer and the external shielding layer of the long cable of Decanning, directly at the additional sheath of internal shield, a point wiring is suspended between bushing shell for transformer.
Described sleeve pipe main folder, for connecting the cover pipe range cable drawn from ground host machine, should have certain structural strength, can hang up cover pipe range cable, possess a point connection function simultaneously, divide wiring to connect other sleeve pipe by sleeve pipe.
2) each bottom shielding of bushing lead set synthesizes the long cable of end shield that can be shared major insulation, divides wiring to be tapped into each bottom shielding of bushing by end shield breakout box and end shield, and the other end of the long cable of end shield draws and connects detection main frame.
The heart yearn group of built-in 8 heart yearns (consistent with bottom shielding of bushing quantity) of the long cable of described end shield, for collection or the power supply applying of detection signal; Wrap up an internal shield outside heart yearn group, this screen layer is made up of inner screening aluminium foil and inner screening net, forms low-voltage insulation with heart yearn; Internal shield outer wrapping one main insulating layer, dielectric strength needs design by insulation (DC2500V) the highest in test item; An external shielding layer is wrapped up again outward, at the outer wrap jacket layer again of external shielding layer at main insulating layer.
Described end shield divides wiring close with the long cable of end shield, and heart yearn is 1, considers that end shield insulation against ground resistance test need ensure that this cable DC2500V is withstand voltage, therefore at internal shield outer wrapping one main insulating layer.
Described end shield breakout box is responsible for being combined drawing each bottom shielding of bushing connect, and is connected, and divides wiring to be connected with bottom shielding of bushing with clip by end shield by the long cable of end shield with ground host machine.
Beneficial effect of the present invention: High-Voltage Insulation and double shield structure, very large to the volume of cable, weight, said method can improve the utilization ratio of High-Voltage Insulation and double shield structure, reduce quantity, the weight of high-voltage connection, thus reduce the workload, the labour intensity that detect operation, improve the quality of transformer correlation test.
Accompanying drawing explanation
Fig. 1 is the wiring schematic diagram of three-phase integrated power transformer Aulomatizeted Detect;
Fig. 2 is cover pipe range cable sectional view;
Fig. 3 is main folder sleeve pipe and point map interlinking from jacket pipe;
Fig. 4 is the long construction of cable schematic diagram of end shield;
Fig. 5 is that end shield divides wiring construction schematic diagram.
Embodiment
The mode of connection of a kind of Integral three-phase power transformer of the present invention Aulomatizeted Detect, concrete grammar is as follows:
As shown in Figure 1, Figure 3,1) by the coherent detection long lead of casing high pressure leading-out terminal, assemble by the high, medium and low grade grouping of winding voltage the cover pipe range cable that 3 can be shared one deck high pressure major insulation, every root cover pipe range cable is responsible for the lead-in wire set needed for three of a certain electric pressure or four bushings detections to cause detect main frame and connect; The every root be connected with ground host machine overlaps pipe range cable, an effective main folder of cover being positioned at centre position (being conducive to shortening a point wiring) is selected to connect, divide wiring to be connected with other sleeve pipes with from folder from main folder sleeve pipe again, a point wiring is suspended between bushing shell for transformer.
2) an end shield long cable one end is separately established to divide wiring to be tapped into each bottom shielding of bushing by end shield junction box through sleeve pipe, the other end draws and is connected to detection main frame, because this group line adds end shield insulation against ground resistance test, so the long cable of this end shield, end shield divide wiring and end shield junction box structure all to have employed double shield structure.
As shown in Figure 2, the structural design of every root cover pipe range cable is:
Built-in mutual low-voltage insulation
1.4 pairs of heart yearn groups (consistent with sleeve pipe quantity), often pair of heart yearn carefully matches by one thick one, low-voltage insulation between each heart yearn; Thick line 1 is mainly for detection of the applying of power supply, and through-current capability mainly considers the needs of the test items such as direct current resistance; Fine rule 2, for signals collecting, does not need to consider through-current capability; Wrap up a semi-conductive tape 3 outside heart yearn group, the homogeneity of high-voltage electric field can be improved, improve the voltage endurance capability of main insulating layer; Semi-conductive tape outer wrapping one internal shield, this screen layer is made up of inner screening aluminium foil 4 and inner screening net 5, wherein inner screening aluminium foil can strengthen the shield effectiveness of inner screening net, this screen layer is in ground state when low pressure test (LPT), play electrostatic screening, when high pressure project and internal core apply high pressure simultaneously, play equivalent potential screen, this screen layer and heart yearn form low-voltage insulation; Internal shield outer wrapping one main insulating layer 7, dielectric strength needs design by insulation the highest in test item, is 10kV at home; An external shielding layer is wrapped up again outward, at the outer wrap jacket layer 8 again of external shielding layer at main insulating layer.
As shown in Figure 4, the structure of the long cable of end shield is: built-in 8 heart yearns of the long cable of end shield are consistent with bottom shielding of bushing quantity, and 8 heart yearn thicknesses are consistent, simultaneously for high pressure detection experiment signal collection or apply power supply simultaneously, do not need to consider its through-current capability; Wrap up an internal shield outside heart yearn group, this screen layer is made up of inner screening aluminium foil and inner screening net, forms low-voltage insulation with heart yearn; Internal shield outer wrapping one main insulating layer, dielectric strength needs design by insulation the highest in test item; An external shielding layer is wrapped up again outward, at external shielding layer wrap jacket layer again at main insulating layer.
As shown in Figure 5, wherein the structure of bushing lead-in wire is: built-in 1 core of sleeve pipe lead cable of this end shield, heart yearn outer wrapping one internal shield, and this screen layer is made up of inner screening aluminium foil and inner screening net, forms low-voltage insulation with heart yearn; Internal shield outer wrapping one main insulating layer, considers that end shield insulation against ground resistance test need ensure that this cable DC2500V is withstand voltage; An external shielding layer is wrapped up again outward, at external shielding layer wrap jacket layer again at main insulating layer.
Main folder sleeve pipe and be, point built-in two heart yearns of wiring, heart yearn outer wrapping one internal shield that this screen layer is made up of inner screening aluminium foil and inner screening net, forms low-voltage insulation with heart yearn from the structure of point wiring between jacket pipe; Internal shield outer wrapping restrictive coating.
Claims (5)
1. a mode of connection for Integral three-phase power transformer Aulomatizeted Detect, is characterized in that:
1) by the coherent detection long lead of casing high pressure leading-out terminal, assemble by the high, medium and low grade grouping of winding voltage the cover pipe range cable that 3 can be shared one deck high pressure major insulation, every root cover pipe range cable is responsible for the lead-in wire set needed for three of a certain electric pressure or four bushings detections to cause detect main frame and connect; The every root be connected with ground host machine overlaps pipe range cable, and select an effective main folder of cover being positioned at centre position to connect, then divide wiring to be connected with other sleeve pipes with from folder from main folder sleeve pipe, a point wiring is suspended between bushing shell for transformer;
2) each bottom shielding of bushing lead set is synthesized the long cable of end shield that can be shared major insulation, divide wiring to be tapped into each bottom shielding of bushing by end shield breakout box and end shield, the other end of end shield cable draws and connects detection main frame.
2. the mode of connection of a kind of Integral three-phase power transformer Aulomatizeted Detect according to claim 1, it is characterized in that: four pairs of heart yearn groups of the described built-in mutual low-voltage insulation of cover pipe range cable, often pair of heart yearn carefully matches by one thick one, low-voltage insulation between each heart yearn; Thick line is mainly for detection of the applying of power supply, and fine rule is used for signals collecting; Wrap up a semi-conductive tape outside heart yearn group, to improve the homogeneity of high-voltage electric field, improve the voltage endurance capability of main insulating layer; Semi-conductive tape outer wrapping one internal shield, this screen layer is made up of inner screening aluminium foil and inner screening net, wherein inner screening aluminium foil can strengthen the shield effectiveness of inner screening net, this screen layer is in ground state when low pressure test (LPT), when high pressure project and internal core apply high pressure simultaneously, this screen layer and heart yearn form low-voltage insulation; Internal shield outer wrapping one main insulating layer, dielectric strength needs design by insulation the highest in test item, is 10kV at home; An external shielding layer is wrapped up again outward, at the outer wrap jacket layer again of external shielding layer at main insulating layer.
3. the mode of connection of a kind of Integral three-phase power transformer Aulomatizeted Detect according to claim 1, is characterized in that: built-in 8 heart yearns of the long cable of described end shield, for collection or the experiment power supply applying of detection signal; Wrap up an internal shield outside heart yearn group, this screen layer is made up of inner screening aluminium foil and inner screening net, forms low-voltage insulation with heart yearn; Internal shield outer wrapping one main insulating layer, dielectric strength needs design by insulation the highest in test item; An external shielding layer is wrapped up again outward, at external shielding layer wrap jacket layer again at main insulating layer.
4. the mode of connection of a kind of Integral three-phase power transformer Aulomatizeted Detect according to claim 1, it is characterized in that: end shield divides wiring built-in 1 core, heart yearn outer wrapping one internal shield, this screen layer is made up of inner screening aluminium foil and inner screening net, forms low-voltage insulation with heart yearn; Internal shield outer wrapping one main insulating layer, considers that end shield insulation against ground resistance test need ensure that this cable DC2500V is withstand voltage; An external shielding layer is wrapped up again outward, at external shielding layer wrap jacket layer again at main insulating layer.
5. the mode of connection of a kind of Integral three-phase power transformer Aulomatizeted Detect according to claim 1, is characterized in that: described cover pipe range cable, the long cable of end shield, sleeve pipe divides wiring, end shield divides wiring and end shield breakout box structure all have employed double shield structure.
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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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| 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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| CN105510645A true CN105510645A (en) | 2016-04-20 |
| CN105510645B CN105510645B (en) | 2018-09-07 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108535587A (en) * | 2018-04-19 | 2018-09-14 | 云南电网有限责任公司曲靖供电局 | A kind of transformer connection fault testing apparatus |
| CN111413523A (en) * | 2019-03-27 | 2020-07-14 | 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 |
| CN112666401A (en) * | 2020-12-15 | 2021-04-16 | 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 testing device, cavity conductor and method |
| CN113514669A (en) * | 2021-03-29 | 2021-10-19 | 杭州西湖电子研究所 | Wiring method for equipment detection of traction substation |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN108535587A (en) * | 2018-04-19 | 2018-09-14 | 云南电网有限责任公司曲靖供电局 | A kind of transformer connection fault testing apparatus |
| CN111413523A (en) * | 2019-03-27 | 2020-07-14 | 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 |
| CN112666401A (en) * | 2020-12-15 | 2021-04-16 | 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 testing device, cavity conductor and method |
| CN113514669A (en) * | 2021-03-29 | 2021-10-19 | 杭州西湖电子研究所 | Wiring method for equipment detection of traction substation |
| 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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| CN105510645B (en) | 2018-09-07 |
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