CN108548953B - Potential measurement method and device for stator bar slot of hydraulic generator - Google Patents
Potential measurement method and device for stator bar slot of hydraulic generator Download PDFInfo
- Publication number
- CN108548953B CN108548953B CN201810608847.6A CN201810608847A CN108548953B CN 108548953 B CN108548953 B CN 108548953B CN 201810608847 A CN201810608847 A CN 201810608847A CN 108548953 B CN108548953 B CN 108548953B
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- shell
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- rod
- copper
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Links
- 238000000691 measurement method Methods 0.000 title description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 48
- 229910052802 copper Inorganic materials 0.000 claims abstract description 48
- 239000010949 copper Substances 0.000 claims abstract description 48
- 238000012360 testing method Methods 0.000 claims abstract description 35
- 238000009423 ventilation Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000011810 insulating material Substances 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 abstract description 6
- 239000004745 nonwoven fabric Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Images
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)
- Manufacture Of Motors, Generators (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
A potential measuring method and device for a stator bar slot of a hydraulic generator comprises a shell, a pressure wheel, a conductive module and a test rod. The lower end of the shell is connected with a test rod. The pressure wheel comprises an insulating roller, a movable rod and a pressure spring; the insulating roller is connected with one end of a movable rod through a first bearing, the other end of the movable rod is connected with a second bearing on the shell, and the second bearing is provided with a pressure spring. The conductive module comprises a copper roller, a conductive copper block, a conductive wire and a wiring terminal. The copper roller is fixed with the shell through a third bearing; the conductive copper block is fixedly arranged in the cavity of the shell. One end of the conductive wire is connected with the conductive copper block, and the other end of the conductive wire is led out and then passes through the test rod to be connected with the wiring terminal. The terminal is fixed on the test rod. The potential difference between the semiconductor non-woven fabrics wrapped by the stator bars of the ventilation ditch section of the stator core and the stator core is measured, so that the potential of the stator bar slot at the position is obtained.
Description
Technical Field
The invention belongs to the field of high-voltage tests in the power industry, and particularly relates to a method and a device for measuring potential of a stator bar slot of a hydraulic generator.
Background
In the installation process of the large-sized hydraulic generator, after the stator bar is installed, the potential difference between the surface of the bar in the slot of the stator core and the stator core, namely the slot potential, needs to be measured. The level of the slot potential is directly related to the quality of the bar installation. The traditional slot potential testing method is to directly measure the potential difference between the wire rod and the iron core before the stator slot wedge is installed. However, there is no effective method for measuring the slot potential after the slot wedge is installed, or for a generator set that has been installed.
Disclosure of Invention
The invention aims to provide a method and a device for measuring the potential of a stator bar slot of a hydraulic generator, which can be used for measuring the potential of the stator bar slot in a generator set after the installation is completed; the potential difference between the semiconductor non-woven fabrics wrapped by the stator bars of the ventilation ditch section of the stator core and the stator core is measured, so that the potential of the stator bar slot at the position is obtained.
The technical scheme adopted by the invention is as follows:
a potential measuring device for a stator bar slot of a hydraulic generator comprises a shell, a pressure wheel, a conductive module and a test rod. The lower end of the shell is connected with a test rod. The pressure wheel comprises an insulating roller, a movable rod and a pressure spring; the insulating gyro wheel is connected with the one end of movable rod through first bearing, and the other end of movable rod is connected with the second bearing on the shell, the second bearing has and installs pressure spring, through pressure spring's deformation, can realize the multi-angle activity of pressure wheel in the shell. The conductive module comprises a copper roller, a conductive copper block, a conductive wire and a wiring terminal. The copper roller is fixed with the shell through a third bearing, and can roll freely; the conductive copper block is fixedly arranged in the cavity of the shell, and the conductive copper block and the copper roller are always in a bonding state when the copper roller rotates. One end of the conductive wire is connected with the conductive copper block, and the other end of the conductive wire is led out and then passes through the test rod to be connected with the wiring terminal. The terminal is fixed on the test rod and used for connecting the conductive wire with the test circuit.
The shell is made of insulating materials and is in a flat cuboid shape, and two cavities are formed in the shell to provide a base for the pressure wheel and the conductive module; the shell is internally provided with a pressure wheel and a conductive module.
The conductive module comprises a dustproof rubber, the dustproof rubber is arranged on the shell, the dustproof rubber is positioned on two sides of the copper roller and used for blocking dirt carried by the copper roller during rotation and protecting the copper roller and the conductive copper block.
The test rod comprises an insulating rod, a graduated scale and a handle; the insulating rod is connected with the shell and provides a path for leading out the conducting wire; the graduated scale is used for enabling a tester to know the depth of the test device inserted into the ventilation ditch; the handle is used for enabling a tester to conveniently hold the test device.
According to the potential measuring method for the stator bar slot of the hydraulic generator, a measuring device is stretched into a ventilation ditch, a copper roller in a conductive module is tightly attached to a semiconductor material on the surface of a bar in the ventilation ditch under the action of a pressure wheel, and the conductive module conducts out a potential value on the semiconductor material on the surface of the bar, so that the slot potential value at the position is obtained.
The invention discloses a method and a device for measuring the potential of a stator bar slot of a hydro-generator, which create a new method for measuring the potential of the slot from a ventilation ditch, and can reliably and conveniently measure the potential of the slot without damaging the outer slot wedge of the bar.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic diagram of the structure of the measuring device of the present invention.
Fig. 2 (1) is a plan view of the environment in the ventilation trench of the stator core.
Fig. 2 (2) is: the measuring device is positioned outside the ventilation ditch, and the pressure wheel is in a natural state schematic diagram.
Fig. 2 (3) is: the measuring device is positioned at the air inlet of the ventilation ditch, and the copper roller contacts with the insulating material schematic diagrams such as the slot wedge and the like.
Fig. 2 (4) shows: after the measuring device enters the ventilation ditch, the pressure wheel applies a pressure schematic diagram to the support steel bars of the ventilation ditch under the action of the pressure spring.
Fig. 2 (5) is: the measuring device moves to the farthest position, and a graduated scale on the test rod is close to a schematic diagram at the air inlet of the ventilation ditch.
Wherein: a is a semiconductor material on the surface of the wire rod; b is a ventilation ditch supporting steel bar; c is insulating material such as slot wedge.
Detailed Description
A potential measuring device for a stator bar slot of a hydraulic generator comprises a shell 1, a pressure wheel 2, a conductive module 3 and a test rod 4. The lower end part of the shell 1 is connected with a test rod 4. The pressure wheel 2 comprises an insulating roller 21, a movable rod 22 and a pressure spring 23; the insulating roller 21 is connected with one end of the movable rod 22 through a first bearing, the other end of the movable rod 22 is connected with a second bearing on the shell 1, the second bearing is provided with a pressure spring 23, and the pressure roller 2 can move in multiple angles in the shell 1 through deformation of the pressure spring 23.
The conductive module 3 comprises a copper roller 31, a conductive copper block 32, a conductive wire 33 and a wiring terminal 34. The copper roller 31 is fixed with the shell 1 through a third bearing, and the copper roller 31 can roll freely; the conductive copper block 32 is fixedly installed in the cavity of the housing 1, and when the copper roller 31 rotates, the conductive copper block 32 and the copper roller 31 are always in a bonding state. One end of the conductive wire 33 is connected with the conductive copper block 32, and the other end of the conductive wire 33 is led out and then passes through the test rod 4 to be connected with the wiring terminal 34. The connecting terminal 34 is fixed on the test rod 4 and is used for connecting the conductive wire 33 with a test line.
The shell 1 is made of insulating materials and is in a flat cuboid shape, and two cavities are formed in the shell 1 to provide bases for the pressure wheel 2 and the conductive module 3; the pressure wheel 2 and the conductive module 3 are arranged in the shell 1. The pressure wheel 2 causes the copper roller 31 of the device to stick to the bar slot potential test area, thereby measuring the bar slot potential in the ventilation trench. The slot potential is measured by the vent slot without damaging the bar outer slot wedge.
The conductive module 3 comprises a dustproof rubber 35, the dustproof rubber 35 is arranged on the shell 1, the dustproof rubber 35 is positioned on two sides of the copper roller 31 and used for blocking dirt carried by the copper roller 31 during rotation and protecting the copper roller 31 and the conductive copper block 32.
The test rod 4 comprises an insulating rod 41, a graduated scale 42 and a handle 43; the insulating rod 41 is connected with the shell 1, and the insulating rod 41 provides a path for leading out the conductive wire 33; the graduated scale 42 is used for allowing a tester to know the depth of the test device inserted into the ventilation ditch; the handle 43 is used for facilitating the test personnel to hold the test device.
The implementation steps are as follows:
as shown in FIG. 2 (2), the device is positioned outside the ventilation ditch, and the pressure wheel 2 is in a natural state.
As shown in fig. 2 (3), the device is located at the air inlet of the ventilation ditch, at this time, the copper roller 31 contacts with the insulation material such as slot wedge, and the pressure roller 2 contacts with the support steel bar of the ventilation ditch, so that the pressure roller 2 is pressed to rotate due to the fact that the size of the air inlet is smaller than that of the device.
After the device of the present invention enters the ventilation trench as shown in fig. 2 (4), the pressure wheel 2 applies pressure to the ventilation trench support steel bar under the action of the pressure spring 23, so that the copper roller 31 is closely attached to the semiconductor material on the surface of the bar, and the cell potential at the point can be measured in fig. 2 (1).
As shown in FIG. 2 (5), the device of the present invention is moved furthest, and the scale 42 on the test rod 4 is now close to the air inlet of the ventilation ditch, and stops further penetration, so that the device of the present invention can be slowly moved out, and the potential test of the groove is finished.
Claims (2)
1. The potential measuring device for the stator bar slot of the hydraulic generator comprises a shell (1), a pressure wheel (2), a conductive module (3) and a test rod (4); the method is characterized in that: the lower end part of the shell (1) is connected with a test rod (4); the pressure wheel (2) comprises an insulating roller (21), a movable rod (22) and a pressure spring (23); the insulation roller (21) is connected with one end of the movable rod (22) through a first bearing, the other end of the movable rod (22) is connected with a second bearing on the shell (1), the second bearing is provided with a pressure spring (23), and the pressure roller (2) can move at multiple angles in the shell (1) through deformation of the pressure spring (23);
the conductive module (3) comprises a copper roller (31), a conductive copper block (32), a conductive wire (33) and a wiring terminal (34);
the copper roller (31) is fixed with the shell (1) through a third bearing, and the copper roller (31) can roll freely; the conductive copper block (32) is fixedly arranged in the cavity of the shell (1), and when the copper roller (31) rotates, the conductive copper block (32) and the copper roller (31) are always in a bonding state;
one end of the conducting wire (33) is connected with the conducting copper block (32), and the other end of the conducting wire (33) is led out and then passes through the test rod (4) to be connected with the wiring terminal (34);
the wiring terminal (34) is fixed on the test rod (4) and is used for connecting the conductive wire (33) with the test line;
the shell (1) is made of insulating materials and is in a flat cuboid shape, and two cavities are formed in the shell (1) to provide bases for the pressure wheel (2) and the conductive module (3); the pressure wheel (2) and the conductive module (3) are arranged in the shell (1);
the conductive module (3) comprises a dustproof rubber (35), the dustproof rubber (35) is arranged on the shell (1), the dustproof rubber (35) is positioned on two sides of the copper roller (31) and used for blocking dirt brought up when the copper roller (31) rotates and protecting the copper roller (31) and the conductive copper block (32).
2. The hydro-generator stator bar slot potential measurement device of claim 1, wherein: the test rod (4) comprises an insulating rod (41), a graduated scale (42) and a handle (43); the insulating rod (41) is connected with the shell (1), and the insulating rod (41) provides a path for leading out the conductive wire (33); the graduated scale (42) is used for enabling a tester to know the depth of the test device inserted into the ventilation ditch; the handle (43) is used for enabling a tester to conveniently hold the test device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310515647.7A CN116449079A (en) | 2018-06-13 | 2018-06-13 | Potential measuring method for stator bar slot of hydraulic generator |
| CN201810608847.6A CN108548953B (en) | 2018-06-13 | 2018-06-13 | Potential measurement method and device for stator bar slot of hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810608847.6A CN108548953B (en) | 2018-06-13 | 2018-06-13 | Potential measurement method and device for stator bar slot of hydraulic generator |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310515647.7A Division CN116449079A (en) | 2018-06-13 | 2018-06-13 | Potential measuring method for stator bar slot of hydraulic generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108548953A CN108548953A (en) | 2018-09-18 |
| CN108548953B true CN108548953B (en) | 2023-06-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310515647.7A Pending CN116449079A (en) | 2018-06-13 | 2018-06-13 | Potential measuring method for stator bar slot of hydraulic generator |
| CN201810608847.6A Active CN108548953B (en) | 2018-06-13 | 2018-06-13 | Potential measurement method and device for stator bar slot of hydraulic generator |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310515647.7A Pending CN116449079A (en) | 2018-06-13 | 2018-06-13 | Potential measuring method for stator bar slot of hydraulic generator |
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| CN (2) | CN116449079A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110632513A (en) * | 2019-08-19 | 2019-12-31 | 华电电力科学研究院有限公司 | Generator stator slot anti-corona layer potential measuring device and measuring method |
| CN110687342A (en) * | 2019-09-23 | 2020-01-14 | 大唐陕西发电有限公司西安热电厂 | Generator shaft voltage measuring tool |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203727415U (en) * | 2014-03-05 | 2014-07-23 | 武汉铁路局科学技术研究所 | Portable railroad cargo loading and reinforcing state inspection instrument |
| CN204008807U (en) * | 2014-07-14 | 2014-12-10 | 葛洲坝集团机电建设有限公司 | A kind of generator unit stator slot for winding current potential detector |
| JP6631207B2 (en) * | 2015-12-01 | 2020-01-15 | 中国電力株式会社 | Connection adapter and ground short-circuit device for accident point detection device |
| CN206292284U (en) * | 2016-11-02 | 2017-06-30 | 中广核核电运营有限公司 | Generator amature shaft-voltage measurement part |
| CN208488493U (en) * | 2018-06-13 | 2019-02-12 | 中国长江电力股份有限公司 | A kind of turbine generator stator bar slot potential test device |
-
2018
- 2018-06-13 CN CN202310515647.7A patent/CN116449079A/en active Pending
- 2018-06-13 CN CN201810608847.6A patent/CN108548953B/en active Active
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| Publication number | Publication date |
|---|---|
| CN116449079A (en) | 2023-07-18 |
| CN108548953A (en) | 2018-09-18 |
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