CN108802560A - A kind of electric testing device of large turbo-type generator stator simulation winding - Google Patents
A kind of electric testing device of large turbo-type generator stator simulation winding Download PDFInfo
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- CN108802560A CN108802560A CN201810775453.XA CN201810775453A CN108802560A CN 108802560 A CN108802560 A CN 108802560A CN 201810775453 A CN201810775453 A CN 201810775453A CN 108802560 A CN108802560 A CN 108802560A
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- Prior art keywords
- groove portion
- support
- support unit
- winding
- stator
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- 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
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/72—Testing of electric windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
The present invention relates to the electric testing devices that a kind of large turbo-type generator stator simulates winding.The experimental rig that the present invention establishes can effectively carry large turbo-type generator stator simulation winding, ensure that accurate size, stabilized structure, angle are suitable, ensure that the safety of stator simulation winding high voltage electrical test carries out.The present invention accurately establishes the slot wedging device and device for fixing end part of stator of steam turbine generator simulation winding, specifies the concrete structure and correlation of these devices for the first time.The device of the invention structure is practical, method is efficient, easily designed, processing and molding, and effective foundation of stator of steam turbine generator simulation winding electrical test integration unit of the present invention lays a good foundation for further further investigation winding electric property.
Description
Technical field
The present invention relates to the electric testing devices that a kind of large turbo-type generator stator simulates winding.
Background technology
Often there is corona and puts during complete machine corona test and pressure test in large turbo-type generator stator winding
Situations such as electricity, flashover breakdown, seriously affects experiment and prototype operation.The electrical test of stator winding includes corona test, pressure resistance
Experiment, Leakage Current experiment, complete machine dielectric loss and local discharge test etc., with the development of the electrical detection technique of winding, Visual retrieval
Technology is more widely applied in the experiment of winding corona detection, and horizontal to the discharge inception voltage of winding more stringent requirements are proposed.
With the promotion of turbine-generator rated capacity and rated voltage, the design structure of unit is more compact, and insulation is set
Meter nargin is smaller and smaller, and more stringent requirements are proposed for insulation and anti-corona performance to complete machine winding.Meanwhile air cooling unit knot due to
Structure is simple, easy to maintain, becomes one of the Main way of market exploitation and demand.Steam turbine generator product equally faces installation
The trend that ground height above sea level increases.These variations, it is desirable that more strictly examine and verify steam turbine generator winding insulation performance, need
Effectively carry out correlation test and analysis work.Therefore, the electric testing device of large turbo-type generator stator simulation winding is made
Be very it is necessary to.
Large turbo-type generator stator coil, shape is longer, heavier-weight, and end torsion angle is larger, centre-of gravity shift, places
It is more demanding for the stability of experimental rig with fixed more difficulty.Moreover, steam turbine generator stator coil end is mostly gradually
Involute shape, from end turn beginning to lead, bevel edge gap design theory value is consistent.If slightly deviation when installation is held
Easily cause bevel edge gap uneven, influences experiment and operational effect.
When steam turbine generator winding electrical test, the voltage applied is high voltage, and generally up to 10kV or more, highest can
Up to 70kV or so, it is easy because arcing distance or creepage distance are insufficient, the problems such as causing flashover or climb electricity.When unit design, not only
It is considered as compact-sized, should also fully consider safe-discharge distance and safety creepage distance.
When the branched bar electrical test of traditional analog, using in identical platform the branched stator bar of laid parallel carry out electricity
Gas is tested, and this method precision is too low, can not ensure that branched bar relative position is accurate embedding with the consistent and prototype of involute distance
The position difference of winding is very big after line, therefore test effect is undesirable.
When winding electrical test, the application of visible detection method in the unit is more and more.Visible detection method packet
Include ultraviolet image method, infrared thermal imagery method and high speed video process.Wherein, ultraviolet image method detects corona, infrared thermal imagery method detection temperature
Degree, high speed video process record flashover discharge scenario.Electrical test is high-voltage test, and tester needs to keep centainly with winding
Safety operation distance, and need good observation angle.It is tested particularly with UV corona, the observation photon of different angle
Number should ensure that observation angle is parallel with discharging gap there are bigger difference.When winding test, in the case that consideration is mechanically fixed,
Also to ensure good observation angle.
Therefore, the electric testing device of large turbo-type generator stator simulation winding, need to consider structure, it is electrical,
The problem of observation etc., it is difficult to implement.Meanwhile there are certain correlations for the parameter of each support construction, need
It to be fully considered in design.
Invention content
The purpose of the present invention is establishing, a kind of structure is accurate, the simple large turbo-type generator stator of moulding simulates winding
Electric testing device, the device can firmly carry branched stator bar of turbo generator, composition gap uniformity, safe distance
Enough, the suitable stator winding of angle ensures being smoothed out for large turbo-type generator stator simulation winding electrical test.This hair
Bright technical solution is：A kind of electric testing device of large turbo-type generator stator simulation winding, the simulation test device by
Groove portion support device (1), end support device (2) and end other devices composition, end support device by connecting component with
Groove portion support device is effectively fixed and connects, and the regular length of connecting component is consistent with bar end axial direction extension elongation, end
Other devices and groove portion support device are effectively fixed and connect, and relative altitude is consistent with drawing, groove portion support device (1) by
Multiple identical groove portion support unit (3) compositions, carry out unit connection by groove portion connecting component (4), ensure that device is stablized, end
Portion's support device (2) is made of two various sizes of end support units (5), and unit is carried out by end fixed component (6)
It is fixed；Groove portion support unit (3) shape is identical as stator core groove portion structure, and the groove on groove portion support unit (3) is annular in shape,
It is distributed in rectangular configuration, groove portion support unit (3) upper ground surface vertical line L1With structure centre line L2Angle is groove portion corner φ1, slot
Number >=5, grooved size depend on bar specification, and groove portion support unit number >=3 use groove portion to connect between unit in an axial direction
Component (4) is fixed.
End support unit (5) is installed at the support coil lead head at groove portion support unit (3) both ends, and end support is single
In a ring, groove is distributed on rectangle support the groove of first (5), and the slot number of groove is consistent with groove portion support unit with size, end
Portion's support unit (5) upper ground surface vertical line L3With structure centre line L4Angle is end corner φ2, groove portion support unit (3) both ends,
End support unit (5) respectively has 1, end support unit (5) and flatly between, end fixed using end fixed component (6)
The high h of minimum point in support unit (5) medial end portions slot2。
Groove portion support device (1) and end support device (2) are an overall structure, and there are following relationships：
In formula：R1For groove portion inner circle radius；R2For end inner circle radius；For groove portion corner；For end corner；h1For
Minimum point is high in end grooves；h0It is high for groove portion inner circle minimum point.
Operation principle of the present invention：
The electric testing device of the present invention, groove portion support construction is consistent with stator laminating structure, and guarantee is put into a device
After stator bar, winding is in divergent shape structure, identical as the winding construction after practical Turbo-generator Set embedding.End support knot
The uniformity in each bar end bevel edge gap has been effectively ensured in structure.The conjunctive use of groove portion support construction and end support structure,
And locked, the stability of intensifier effectively fixed to the winding of branched stator bar composition.End support uses insulating materials
It makes, high voltage effectively separates when to electrical test, ensures being smoothed out for stator simulation winding electrical test.
The present invention under the premise of ensureing groove width, slot high size constancy, can adjust groove portion support construction according to experiment needs
Angle, groove portion inner circle radius between the slot of end support structure, end inner circle radius, adjustment groove portion groove portion corner and end corner etc.
Size, and then winding bar spacing and observation angle are adjusted, precise verification is carried out to different winding dimensional structures.
The technique effect of the present invention：
The present invention devises the internal relation between groove portion support, end support structure and bar parameter, ensure that experiment
The structure accuracy of device, it is ensured that the accuracy of test result.
The groove portion support construction of the present invention is formed using 3 groups or more of groove portion support units, consolidates the heavier steamer of carrying
Machine stator bar.The end support structure of the present invention, shape is accurate, while lifting-line stick end weight, is formed with groove portion
Locking structure further enhances structural stability, while not discharging when the guarantee electrical test of its insulation performance, not being afraid of electricity.Groove portion
Support construction and end support structure have certain corner design, can adjust observation angle, reach ideal observation effect.
The present invention have the characteristics that size precisely, stabilized structure, angle it is suitable, can quickly establish structural unit and entire
Device provides a strong guarantee to carry out winding electrical test research, and this method has a wide range of application, is versatile, big to meet
Application demand of the type Stator Coil in occasions such as scientific research, design, experiments.The device of the invention structure is practical, square
Method is efficient, and easily designed, processing and molding, stator of steam turbine generator of the present invention simulate winding electrical test integration unit
Effective foundation, for further further investigation winding electric property lay a good foundation.
Description of the drawings
Fig. 1：Large turbo-type generator stator simulates winding groove portion support unit
Fig. 2：Large turbo-type generator stator simulates winding overhang support unit
Fig. 3：Large turbo-type generator stator simulates winding electrical test combination unit
Specific implementation mode：
Stator of steam turbine generator simulation winding electric property is that winding construction is related to being critical to unit operation stability
Element, inventor pass through rigorous drawing practice and theory deduction, accurately establish the groove portion of stator of steam turbine generator simulation winding
Fixing device and device for fixing end part specify the concrete structure and correlation of these devices for the first time.Specific implementation method is such as
Under：
Model basic parameter includes：Groove portion inner circle radius R1, end inner circle radius R2, angle α between slot, groove portion cornerEnd
Portion's cornerGroove width w1, the high s of slot1, slot number n, the high h in groove portion inner circle bottom0, end and groove portion h0The high h of point corresponding position1, end grooves
The interior high h of minimum point2；
As shown in figure 3, a kind of electric testing device of large turbo-type generator stator simulation winding, the simulation test device
It is made of groove portion support device 1, the other devices of end support device 2 and end, end support device passes through connecting component and slot
Portion's support device is effectively fixed and connection, and the regular length of connecting component is consistent with bar end axial direction extension elongation, end its
Its device is effectively fixed and is connect with groove portion support device, and relative altitude is consistent with drawing, and groove portion support device 1 is by multiple
Identical groove portion support unit 3 forms, and unit connection is carried out by groove portion connecting component 4, ensures that device is stablized, end support dress
It sets 2 to be made of two various sizes of end support units 5, carrying out unit by end fixed component 6 fixes；Groove portion support is single
First 3 shapes are identical as stator core groove portion structure.As shown in Figure 1, the groove on groove portion support unit 3 is annular in shape, it is distributed in square
In shape structure, 3 upper ground surface vertical line L of groove portion support unit1With structure centre line L2Angle is groove portion corner φ1, slot number >=5, slot
Molded dimension depends on bar specification.Groove portion support unit number >=3 use groove portion connecting component 4 to fix between unit in an axial direction.
End support unit 5 is installed at the support coil lead head at 3 both ends of groove portion support unit.As shown in Fig. 2, end
In a ring, groove is distributed on rectangle support the groove of support unit 5, slot number and the size and groove portion support unit one of groove
It causes, 5 upper ground surface vertical line L of end support unit3With structure centre line L4Angle is end corner φ2.3 both ends of groove portion support unit,
End support unit 5 respectively has 1, end support unit 5 and flatly between fixed using end fixed component 6, end support is single
The high h of minimum point in first 5 medial end portions slots2。
Groove portion support device 1 and end support device 2 are an overall structure, and there are following relationships：
In formula：R1For groove portion inner circle radius；R2For end inner circle radius；For groove portion corner；For end corner；h1For
Minimum point is high in end grooves；h0It is high for groove portion inner circle minimum point.
Claims (3)
1. a kind of electric testing device of large turbo-type generator stator simulation winding, it is characterized in that：By groove portion support device
(1), the other device compositions of end support device (2) and end, end support device pass through connecting component and groove portion support device
Effectively fixed and connection, the regular length of connecting component is consistent with bar end axial direction extension elongation, the other devices in end and slot
Portion's support device is effectively fixed and connection, relative altitude are consistent with drawing, and groove portion support device (1) is by multiple identical slots
Portion's support unit (3) forms, and unit connection is carried out by groove portion connecting component (4), ensures that device is stablized, end support device
(2) it is made of two various sizes of end support units (5), carrying out unit by end fixed component (6) fixes；Groove portion branch
Support unit (3) shape is identical as stator core groove portion structure, and the groove on groove portion support unit (3) is annular in shape, is distributed in rectangle
In structure, groove portion support unit (3) upper ground surface vertical line L1With structure centre line L2Angle is groove portion corner φ1, slot number >=5, slot
Molded dimension depends on bar specification, and groove portion support unit number >=3 use groove portion connecting component (4) solid between unit in an axial direction
It is fixed.
2. the electric testing device of large turbo-type generator stator simulation winding according to claim 1, it is characterized in that：End
Portion's support unit (5) is installed at the support coil lead head at groove portion support unit (3) both ends, end support unit (5) it is recessed
In a ring, groove is distributed on rectangle support slot, and the slot number of groove is consistent with groove portion support unit with size, end support unit
(5) upper ground surface vertical line L3With structure centre line L4Angle is end corner φ2, groove portion support unit (3) both ends, end support list
First (5) respectively have 1, end support unit (5) with flatly between use end fixed component (6) fixation, end support unit (5)
The high h of minimum point in medial end portions slot2。
3. the electric testing device of large turbo-type generator stator simulation winding according to claim 1, it is characterized in that：Slot
Portion's support device (1) and end support device (2) are an overall structure, and there are following relationships：
In formula：R1For groove portion inner circle radius；R2For end inner circle radius；For groove portion corner；For end corner；h1For end
Minimum point is high in slot；h0It is high for groove portion inner circle minimum point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775453.XA CN108802560A (en) | 2018-07-16 | 2018-07-16 | A kind of electric testing device of large turbo-type generator stator simulation winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810775453.XA CN108802560A (en) | 2018-07-16 | 2018-07-16 | A kind of electric testing device of large turbo-type generator stator simulation winding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108802560A true CN108802560A (en) | 2018-11-13 |
Family
ID=64076498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810775453.XA Pending CN108802560A (en) | 2018-07-16 | 2018-07-16 | A kind of electric testing device of large turbo-type generator stator simulation winding |
Country Status (1)
| Country | Link |
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| CN (1) | CN108802560A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986756A (en) * | 2021-01-29 | 2021-06-18 | 哈尔滨理工大学 | Nondestructive testing method for determining anti-corona structure of generator stator bar |
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| CN101252300A (en) * | 2008-03-12 | 2008-08-27 | 哈尔滨电机厂有限责任公司 | Stator winding end assembling process |
| CN201398137Y (en) * | 2009-05-19 | 2010-02-03 | 山东齐鲁电机制造有限公司 | Shaping and solidification rake for stator bars |
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| CN201749155U (en) * | 2010-08-06 | 2011-02-16 | 天津市天发重型水电设备制造有限公司 | Medium loss test fixture for generator stator bar coil |
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| CN206114838U (en) * | 2016-11-01 | 2017-04-19 | 国家电网公司 | Generator stator bar's pressure resistance test installation |
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2018
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| CN201438652U (en) * | 2009-06-04 | 2010-04-14 | 水利部杭州机械设计研究所 | Stator wire rod fastening structure |
| CN201749155U (en) * | 2010-08-06 | 2011-02-16 | 天津市天发重型水电设备制造有限公司 | Medium loss test fixture for generator stator bar coil |
| US10020702B2 (en) * | 2012-06-22 | 2018-07-10 | Brusa Elektronik Ag | Stator |
| CN203337771U (en) * | 2013-06-28 | 2013-12-11 | 葛洲坝集团机电建设有限公司 | Voltage-withstanding testing apparatus of stator winding bar of water-turbine generator set |
| CN203707894U (en) * | 2013-10-28 | 2014-07-09 | 哈尔滨电机厂有限责任公司 | Stator bar in-slot gapless fixing structure of hydro-generator |
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| CN206114838U (en) * | 2016-11-01 | 2017-04-19 | 国家电网公司 | Generator stator bar's pressure resistance test installation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112986756A (en) * | 2021-01-29 | 2021-06-18 | 哈尔滨理工大学 | Nondestructive testing method for determining anti-corona structure of generator stator bar |
| CN112986756B (en) * | 2021-01-29 | 2022-08-02 | 哈尔滨理工大学 | Nondestructive testing method for determining anti-corona structure of generator stator bar |
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Application publication date: 20181113 |
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