CN108362945A - A kind of bushing shell for transformer distal end power failure experimental rig and method - Google Patents
A kind of bushing shell for transformer distal end power failure experimental rig and method Download PDFInfo
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- CN108362945A CN108362945A CN201810350892.6A CN201810350892A CN108362945A CN 108362945 A CN108362945 A CN 108362945A CN 201810350892 A CN201810350892 A CN 201810350892A CN 108362945 A CN108362945 A CN 108362945A
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- transformer
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- bushing shell
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000010998 test method Methods 0.000 claims abstract description 16
- 230000001012 protector Effects 0.000 claims abstract description 12
- 238000012360 testing method Methods 0.000 claims description 45
- 238000009413 insulation Methods 0.000 claims description 12
- 210000001699 lower leg Anatomy 0.000 claims description 5
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 abstract description 14
- 230000001174 ascending effect Effects 0.000 abstract description 7
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005404 monopole Effects 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/16—Measuring impedance of element or network through which a current is passing from another source, e.g. cable, power line
- G01R27/18—Measuring resistance to earth, i.e. line to ground
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The present invention relates to the technical fields of substation's test method, more specifically, it is related to a kind of bushing shell for transformer distal end power failure experimental rig and method, including end shield adapter, cable and in-site collecting device, the cable connection is between end shield adapter and in-site collecting device；The end shield adapter is equipped with terminals and ground terminal; the in-site collecting device includes the first terminals being connect respectively with terminals, ground terminal by cable, the second terminals; first terminals are connected with anti-open-circuit protector; first terminals can be connect with megameter, dielectric loss measuring instrument, and second terminals are connected with current transformer.The present invention can realize that not tearing end shield adapter open carries out power failure experiment, the experiment of a sleeve of main transformer can be completed in ground change wiring, realize esd ground operation, elimination is ascended a height operating risk, it saves operation of ascending a height, remove the time for restoring end shield adapter, working efficiency is improved, the person, equipment Risk are reduced.
Description
Technical field
The present invention relates to the technical fields of substation's test method, stop more particularly, to a kind of bushing shell for transformer distal end
Electric test device and method.
Background technology
Bushing shell for transformer, which installs on-line monitoring system additional, can effectively find casing insulation defect, be answered extensively in electric system
With.Casing on-line monitoring system is usually made of end shield adapter, cable, in-site collecting device etc., is filled as bottom shielding of bushing is grounded
It is built-in ground connection to set structure, then need to install end shield adapter additional at bottom shielding of bushing earthing or grounding means, then by cable by end shield
Earth current signal is sent to in-site collecting device and is handled.And according to testing regulations, bushing shell for transformer need to periodically be stopped
Electric test includes mainly major insulation and casing the dielectric dissipation factor tan δ of end shield and capacitance, end shield insulation against ground electricity over the ground
Resistance experiment.
For having installed the bushing shell for transformer of on-line monitoring end shield adapter additional, to eliminate end shield adapter rear end to adopting on the spot
The influence of long range common cable stray capacitance and external disturbance to power failure preventive trial data, traditional experiment between acquisition means
Method need to remove end shield adapter and rear end cable, at end shield earthing or grounding means（Proximal end）It is directly tested, off-test is extensive
After multiple end shield adapter, and at in-site collecting device（Distally）Check that end shield is grounded recovery situation.However, because of end shield adapter
Installation, operating procedure are complicated, and 500kV bottom shielding of bushing imperfect earth, capacitor core caused by misoperation has occurred and has made moist
Defect, to increase bottom shielding of bushing lost territory, the equipment Risk that makes moist.
Invention content
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of power failure experiments of installation bushing shell for transformer distal end
Device and method carries out bushing shell for transformer insulation resistance, dielectric dissipation factor tan δ and capacitance examination at in-site collecting device
It tests.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of bushing shell for transformer distal end power failure experimental rig, including end shield adapter, cable and in-site collecting device, institute are provided
Cable connection is stated between end shield adapter and in-site collecting device；The end shield adapter is equipped with terminals and ground terminal, institute
It includes the first terminals being connect respectively with terminals, ground terminal by cable, the second terminals to state in-site collecting device, described
First terminals are connected with anti-open-circuit protector, and the first terminals can be connect with megameter, dielectric loss measuring instrument, and described second connects
Line end is connected with current transformer.
The bushing shell for transformer distal end power failure experimental rig of the present invention disconnects the company of the first terminals and anti-open-circuit protector
It connects, disconnects the connection of the second terminals and current transformer, test transformer casing is tested in the first terminals connection megameter
Insulation against ground resistance and test transformer casing insulation resistance test test transformer in the first terminals connection dielectric loss measuring instrument
Casing tan δ and capacitance experiment.The present invention can realize that not tearing end shield adapter open carries out power failure experiment, and wiring is changed on ground
The experiment of a sleeve of main transformer can be completed, realizes esd ground operation, eliminates operating risk of ascending a height, operation of ascending a height is saved, removes
Restore the time of end shield adapter, improve working efficiency, reduces the person, equipment Risk.
Further, the cable includes single-core cable and the power failure test wire with function of shielding, the power failure examination
It tests line to be connected between terminals and the first terminals, the single-core cable is connected between ground terminal and the second terminals.Stop
The setting of electric test line can eliminate the influence of electric jamming.
Further, the power failure test wire include the core-wire layer being sequentially arranged from inside to outside, equipotential layer, shielded layer with
And restrictive coating, it is equipped with the first insulating layer between the core-wire layer and equipotential layer, is equipped between the equipotential layer and shielded layer
Second insulating layer.
Further, one end of the power failure test wire is equipped with interface plug, and the interface plug includes connecting with terminals
The first foot connect and the crus secunda in hanging masked state and third foot.First foot is adapted to by power failure test wire with end shield
The terminals of device connect, and crus secunda, third foot are in hanging masked state.
Further, the first disconnecting link, the Current Mutual Inductance are connected between the anti-open-circuit protector and the first terminals
The second disconnecting link is connected between device and the second terminals.First terminals connect realization by the first disconnecting link with anti-open-circuit protector
The protection of circuit, the second terminals connect the acquisition for realizing current signal, the first disconnecting link with current transformer by the second disconnecting link
Setting with the second disconnecting link is mutual convenient for controlling the connection between the first terminals and anti-open-circuit protector, the second terminals and electric current
Connection between sensor.
Further, first disconnecting link is single-pole single-throw switch (SPST), and second disconnecting link is double-pole single throw.
Further, first terminals include the signal wire interface connected by conducting wire and high pressure line interface.The
Two movable contacts of two disconnecting links are connect with the signal wire interface of the second terminals, the first terminals respectively, and the dynamic of the first disconnecting link touches
Point is connect with the high pressure line interface of the first terminals.
Further, first terminals, the second terminals, the first disconnecting link, the second disconnecting link are set to secondary connection plate
On.First terminals, the second terminals are set in secondary connection plate, the first disconnecting link, the second disconnecting link operating side be set to and secondary connect
It is easy to operate outside line plate, and can guarantee the safety of operation.
The present invention also provides a kind of bushing shell for transformer distal end power failure test methods, which is characterized in that including：
The test method of bushing shell for transformer insulation against ground resistance：The first disconnecting link, the second disconnecting link are disconnected, by the first terminals to end
Screen adapter applies voltage and is tested, in the access megameter test of the first terminals；
The test method of bushing shell for transformer insulation resistance：The first disconnecting link, the second disconnecting link are disconnected, megameter is accessed in the first terminals
Test；
The test method of bushing shell for transformer dielectric dissipation factor tan δ and capacitance：The first disconnecting link, the second disconnecting link are disconnected,
The signal wire interface access dielectric loss measuring instrument test of one terminals.
The bushing shell for transformer distal end power failure test method of the present invention, can realize that not tearing end shield adapter open carries out power failure examination
It tests, can complete the experiment of a sleeve of main transformer in ground change wiring, realize esd ground operation, eliminate operating risk of ascending a height,
It saves operation of ascending a height, remove the time for restoring end shield adapter, improve working efficiency, reduce the person, equipment Risk.
Preferably, test transformer casing dielectric dissipation factor tan δ and when capacitance, based on reversal connection collimation method first
The high pressure line interface access dielectric loss measuring instrument test of terminals.The first terminals signal wire interface access dielectric loss measuring instrument into
The positive connection experiment of row carries out reversal connection collimation method experiment, to obtain in the high pressure line interface access dielectric loss measuring instrument of the first terminals
Accurate test transformer casing dielectric dissipation factor tan δ and capacitance.
Compared with prior art, the beneficial effects of the invention are as follows：
The bushing shell for transformer distal end power failure experimental rig and method of the present invention, can realize that not tearing end shield adapter open carries out power failure examination
It tests, can complete the experiment of a sleeve of main transformer in ground change wiring, realize esd ground operation, eliminate operating risk of ascending a height,
It saves operation of ascending a height, remove the time for restoring end shield adapter, improve working efficiency, reduce the person, equipment Risk.
Description of the drawings
Fig. 1 is the structural schematic diagram of the bushing shell for transformer distal end power failure experimental rig of the present invention.
Fig. 2 is the structural schematic diagram of the in-site collecting device of bushing shell for transformer distal end power failure experimental rig.
Fig. 3 is the structural schematic diagram of the power failure test wire of bushing shell for transformer distal end power failure experimental rig.
Specific implementation mode
The present invention is further illustrated With reference to embodiment.Wherein, attached drawing only for illustration,
What is indicated is only schematic diagram rather than pictorial diagram, should not be understood as the limitation to this patent；Reality in order to better illustrate the present invention
Example is applied, the certain components of attached drawing have omission, zoom in or out, and do not represent the size of actual product；To those skilled in the art
For, the omitting of some known structures and their instructions in the attached drawings are understandable.
The same or similar label correspond to the same or similar components in the attached drawing of the embodiment of the present invention；In retouching for the present invention
In stating, it is to be understood that if it is based on attached drawing to have the orientation or positional relationship of the instructions such as term "upper", "lower", "left", "right"
Shown in orientation or positional relationship, be merely for convenience of description of the present invention and simplification of the description, do not indicate or imply the indicated
Device or element must have a particular orientation, with specific azimuth configuration and operation, therefore position relationship described in attached drawing
Term only for illustration, should not be understood as the limitation to this patent, for the ordinary skill in the art, can
To understand the concrete meaning of above-mentioned term as the case may be.
Embodiment one
It is suitable for the first embodiment of the bushing shell for transformer distal end power failure experimental rig of the present invention, including end shield as shown in Figure 1 to Figure 3
Orchestration 1, cable and in-site collecting device 2, cable connection is between end shield adapter 1 and in-site collecting device 2；End shield is adapted to
Device 1 is equipped with terminals 11 and ground terminal 12, and in-site collecting device 2 includes being connected respectively by cable and terminals 11, ground terminal 12
The first terminals 21, the second terminals 22 connect, the first terminals 21 are connected with anti-open-circuit protector 3,21 energy of the first terminals
Enough to be connect with megameter, dielectric loss measuring instrument, the second terminals are connected with current transformer 4.
Specifically, as shown in Figure 1, cable includes single-core cable 5 and the power failure test wire 6 with function of shielding, have a power failure
Test wire 6 is connected between terminals 11 and the first terminals 21, and single-core cable 5 is connected to ground terminal 12 and the second terminals 22
Between.Wherein, as shown in figure 3, power failure test wire 6 includes the core-wire layer 61 being sequentially arranged from inside to outside, equipotential layer 62, shielding
Layer 63 and restrictive coating 64 are equipped with the first insulating layer 65, equipotential layer 62 and shielded layer between core-wire layer 61 and equipotential layer 62
Second insulating layer 66 is equipped between 63, the setting of shielded layer 63 can eliminate the influence of electric jamming.As shown in Fig. 2, the examination that has a power failure
The one end for testing line 6 is equipped with interface plug 7, and interface plug 7 includes the first foot 71 being connect with terminals and shielded in hanging
The crus secunda 72 and third foot 73 of state, the first foot 71 are connect by power failure test wire 6 with the terminals 11 of end shield adapter 1,
Crus secunda 72, third foot 73 are in hanging masked state.
As shown in Figure 1 and Figure 2, the first disconnecting link 8, Current Mutual Inductance are connected between anti-open-circuit protector 3 and the first terminals 21
The second disconnecting link 9 is connected between device 4 and the second terminals 22, the first terminals 21 pass through the first disconnecting link 8 and anti-open-circuit protector 3
Connection realizes that the protection of circuit, the second terminals 22 are connect by the second disconnecting link 9 with current transformer 4 and realize adopting for current signal
Collection, the setting of the first disconnecting link 8 and the second disconnecting link 9 convenient between the first terminals 21 of control and anti-open-circuit protector 3 connection, the
Connection between two terminals 22 and current transformer 4.Wherein, the first disconnecting link 8 is single-pole single-throw switch (SPST), and the second disconnecting link 9 is double
Monopole single throw switch, the first terminals 21 include the signal wire interface 23 connected by conducting wire and high pressure line interface 24.Second knife
Two movable contacts of lock 9 are connect with the signal wire interface 23 of the second terminals 22, the first terminals 21 respectively, the first disconnecting link 8
Movable contact is connect with the high pressure line interface 24 of the first terminals 21.
In addition, the first terminals 21, the second terminals 22, the first disconnecting link 8, the second disconnecting link 9 are set to secondary connection plate 10
On, the first terminals 21, the second terminals 22 be set to secondary connection plate 10 in, the first disconnecting link 8, the second disconnecting link 9 operating side set
It is easy to operate in outside secondary connection plate 10, and can guarantee the safety of operation.
Embodiment two
The present embodiment is the embodiment of bushing shell for transformer distal end power failure test method, including：
The test method of bushing shell for transformer insulation against ground resistance：The first disconnecting link 8, the second disconnecting link 9 are disconnected, the first terminals 21 are passed through
Apply voltage to end shield adapter 1 to test, in the access megameter test of the first terminals 21；
The test method of bushing shell for transformer insulation resistance：The first disconnecting link 8, the second disconnecting link 9 are disconnected, million are accessed in the first terminals 21
Europe table test；
The test method of bushing shell for transformer dielectric dissipation factor tan δ and capacitance：The first disconnecting link 8, the second disconnecting link 9 are disconnected,
The signal wire interface 23 of first terminals 21 accesses dielectric loss measuring instrument test.
Preferably, test transformer casing dielectric dissipation factor tan δ and when capacitance, based on reversal connection collimation method first
The high pressure line interface 24 of terminals 21 accesses dielectric loss measuring instrument test.Dielectric loss is accessed in the signal wire interface 23 of the first terminals 21
Tester carries out positive connection experiment, and accessing dielectric loss measuring instrument in the high pressure line interface 24 of the first terminals 21 carries out reversal connection collimation method
Experiment, to obtain accurate test transformer casing dielectric dissipation factor tan δ and capacitance.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
All any modification, equivalent and improvement etc., should be included in the claims in the present invention made by within the spirit and principle of invention
Protection domain within.
Claims (10)
1. a kind of bushing shell for transformer distal end power failure experimental rig, which is characterized in that including end shield adapter（1）, cable and just
Ground harvester（2）, the cable connection is in end shield adapter（1）With in-site collecting device（2）Between；The end shield adapter
（1）Equipped with terminals（11）And ground terminal（12）, the in-site collecting device（2）Including respectively by cable and terminals, connect
First terminals of ground terminal connection（21）, the second terminals（22）, first terminals（21）It is connected with anti-open-circuit protector
（3）, the first terminals（21）It can be connect with megameter, dielectric loss measuring instrument, second terminals（22）It is mutual to be connected with electric current
Sensor（4）.
2. power failure experimental rig in bushing shell for transformer distal end according to claim 1, which is characterized in that the cable includes single
Core cable（5）And the power failure test wire with function of shielding（6）, the power failure test wire（6）It is connected to terminals（11）With
First terminals（21）Between, the single-core cable（5）It is connected to ground terminal（12）With the second terminals（22）Between.
3. power failure experimental rig in bushing shell for transformer distal end according to claim 2, which is characterized in that the power failure test wire
（6）Including the core-wire layer being sequentially arranged from inside to outside（61）, equipotential layer（62）, shielded layer（63）And restrictive coating（64）, institute
State core-wire layer（61）And equipotential layer（62）Between be equipped with the first insulating layer（65）, the equipotential layer（62）And shielded layer（63）
Between be equipped with second insulating layer（66）.
4. power failure experimental rig in bushing shell for transformer distal end according to claim 3, which is characterized in that the power failure test wire
（6）One end be equipped with interface plug（7）, the interface plug includes the first foot being connect with terminals（71）And in hanging
The crus secunda of masked state（72）With third foot（73）.
5. power failure experimental rig in bushing shell for transformer distal end according to any one of claims 1 to 4, which is characterized in that described
Anti- open-circuit protector（3）With the first terminals（21）Between be connected with the first disconnecting link（8）, the current transformer（4）With second
Terminals（22）Between be connected with the second disconnecting link（9）.
6. power failure experimental rig in bushing shell for transformer distal end according to claim 5, which is characterized in that first disconnecting link
（8）For single-pole single-throw switch (SPST), second disconnecting link（9）For double-pole single throw.
7. power failure experimental rig in bushing shell for transformer distal end according to claim 6, which is characterized in that first terminals
（21）It include the signal wire interface connected by conducting wire（23）And high pressure line interface（24）.
8. power failure experimental rig in bushing shell for transformer distal end according to claim 5, which is characterized in that first terminals
（21）, the second terminals（22）, the first disconnecting link（8）, the second disconnecting link（9）It is set to secondary connection plate（10）On.
9. a kind of bushing shell for transformer distal end power failure test method, which is characterized in that including：
The test method of bushing shell for transformer insulation against ground resistance：Disconnect the first disconnecting link（8）, the second disconnecting link（9）, pass through the first wiring
End is to end shield adapter（1）Apply voltage to be tested, in the first terminals（21）Access megameter test；
The test method of bushing shell for transformer insulation resistance：Disconnect the first disconnecting link（8）, the second disconnecting link（9）, in the first terminals（21）
Access megameter test；
The test method of bushing shell for transformer dielectric dissipation factor tan δ and capacitance：Disconnect the first disconnecting link（8）, the second disconnecting link
（9）, in the first terminals（21）Signal wire interface（23）Access dielectric loss measuring instrument test.
10. power failure test method in bushing shell for transformer distal end according to claim 9, which is characterized in that test transformer set
Pipe dielectric dissipation factor tan δ and when capacitance, based on reversal connection collimation method in the first terminals（21）High pressure line interface（24）It connects
Enter dielectric loss measuring instrument test.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810350892.6A CN108362945A (en) | 2018-04-18 | 2018-04-18 | A kind of bushing shell for transformer distal end power failure experimental rig and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810350892.6A CN108362945A (en) | 2018-04-18 | 2018-04-18 | A kind of bushing shell for transformer distal end power failure experimental rig and method |
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| Publication Number | Publication Date |
|---|---|
| CN108362945A true CN108362945A (en) | 2018-08-03 |
Family
ID=63008648
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810350892.6A Pending CN108362945A (en) | 2018-04-18 | 2018-04-18 | A kind of bushing shell for transformer distal end power failure experimental rig and method |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354418A (en) * | 2008-09-22 | 2009-01-28 | 河南省电力公司商丘供电公司 | Power transformer test method without disconnecting wire |
| CN201945639U (en) * | 2010-12-23 | 2011-08-24 | 保定供电公司 | Power uninterrupted test box for capacitive equipment |
| CN203216999U (en) * | 2013-04-19 | 2013-09-25 | 保定市力兴电子设备有限公司 | Capacitive equipment dielectric loss live line measurement sampling device |
| CN103336186A (en) * | 2012-12-18 | 2013-10-02 | 辽宁省电力有限公司检修分公司 | Method for testing transformer equipment without disassembling lead |
| CN105510645A (en) * | 2015-11-30 | 2016-04-20 | 杭州西湖电子研究所 | Wiring method for automatic detection of three-phase integrated-type power transformer |
| CN205941610U (en) * | 2016-07-26 | 2017-02-08 | 广东电网有限责任公司佛山供电局 | Main transformer bushing tap adapter |
| CN208140801U (en) * | 2018-04-18 | 2018-11-23 | 广东电网有限责任公司 | A kind of bushing shell for transformer distal end power failure experimental rig |
-
2018
- 2018-04-18 CN CN201810350892.6A patent/CN108362945A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101354418A (en) * | 2008-09-22 | 2009-01-28 | 河南省电力公司商丘供电公司 | Power transformer test method without disconnecting wire |
| CN201945639U (en) * | 2010-12-23 | 2011-08-24 | 保定供电公司 | Power uninterrupted test box for capacitive equipment |
| CN103336186A (en) * | 2012-12-18 | 2013-10-02 | 辽宁省电力有限公司检修分公司 | Method for testing transformer equipment without disassembling lead |
| CN203216999U (en) * | 2013-04-19 | 2013-09-25 | 保定市力兴电子设备有限公司 | Capacitive equipment dielectric loss live line measurement sampling device |
| CN105510645A (en) * | 2015-11-30 | 2016-04-20 | 杭州西湖电子研究所 | Wiring method for automatic detection of three-phase integrated-type power transformer |
| CN205941610U (en) * | 2016-07-26 | 2017-02-08 | 广东电网有限责任公司佛山供电局 | Main transformer bushing tap adapter |
| CN208140801U (en) * | 2018-04-18 | 2018-11-23 | 广东电网有限责任公司 | A kind of bushing shell for transformer distal end power failure experimental rig |
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Application publication date: 20180803 |