CN108988590A - A kind of 6000V stator of synchronous motor winding single-point grounding failure speed discharge method - Google Patents
A kind of 6000V stator of synchronous motor winding single-point grounding failure speed discharge method Download PDFInfo
- Publication number
- CN108988590A CN108988590A CN201810966532.9A CN201810966532A CN108988590A CN 108988590 A CN108988590 A CN 108988590A CN 201810966532 A CN201810966532 A CN 201810966532A CN 108988590 A CN108988590 A CN 108988590A
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- China
- Prior art keywords
- synchronous motor
- winding
- stator
- ground connection
- discharge method
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
-
- 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
- G01R31/34—Testing dynamo-electric machines
- G01R31/346—Testing of armature or field windings
-
- 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
-
- 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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
Abstract
The invention discloses a kind of 6000V stator of synchronous motor winding single-point grounding failure speed discharge methods, are related to Large-scale High-Pressure synchronous motor maintenance technique field, comprising the following steps: step 1 searches ground connection winding；Ground connection winding that step 2, break step 1 are found simultaneously does short circuit processing to its connecting lead wire；Step 3, the ground connection winding for preventing step 1 from finding generate vortex；Step 4 carries out insulation processing to the ground connection winding cut-off point that step 2 generates；Step 5,6000V synchronous motor pressure test；Step 6,6000V synchronous motor trial operation；Step 7,6000V synchronous motor operate normally.The present invention can disconnect single-point grounding winding, quickly resume production, extend the service life of motor, be preferably minimized economic loss, the present invention is safe and reliable, simple and easy, low in cost, good application effect in the case where being changed without winding.
Description
Technical field
The present invention relates to Large-scale High-Pressure synchronous motor maintenance technique field more particularly to a kind of 6000V synchronous motors
Stator winding single-point grounding failure speed discharge method.
Background technique
In coal chemical industry Ammonia Production device, the operating condition for the synchronous motor that large-scale hydrogen nitrogen compressor uses has as follows
Situation:
6000V synchronous motor in operation, due to overvoltage, insulation ag(e)ing, mechanical damage etc., causes to occur high
Stator of synchronous motor winding single-point grounding failure is pressed, then relay protection acts, host tripping parking.
The synchronous motor of one bench-type TK5000-18/2600, stator voltage 6000V, stator current 553A, 180 slots,
Double Layer Winding, three tunnels are in parallel.If an only slot grounding of stator winding, and grounding point, in lower layer's notch, conventional repair would be more
Whole stator winding are changed, 340,000 yuan of expense or so, the repairing time about 30 days, cause greater loss to enterprise.
In order to save this expense, extend motor service life, we in the case where guaranteeing safety, the slot be grounded around
Group is disconnected with other normal windings, and takes the winding of disconnection the measure for preventing vortex, is quickly resumed production, is made company
Loss is minimized.
Therefore, those skilled in the art is dedicated to developing a kind of 6000V stator of synchronous motor single-point grounding failure
Immediate processing method.
Summary of the invention
In view of the above drawbacks of the prior art, the technical problem to be solved by the present invention is in 6000V synchronous motor
When stator single-point grounding failure occurs, maintenance cost is reduced, extends motor service life, quickly resumes production, make enterprises' loss
It is minimized.
To achieve the above object, the present invention provides a kind of 6000V stator of synchronous motor winding single-point grounding failure speed
Discharge method, which comprises the following steps:
Step 1 searches ground connection winding；
The ground connection winding that step 2, break step 1 are found simultaneously does short circuit processing to its connecting lead wire；
Step 3, the ground connection winding for preventing step 1 from finding generate vortex；
Step 4 carries out insulation processing to the ground connection winding cut-off point that step 2 generates；
Step 5, the 6000V synchronous motor pressure test；
Step 6, the 6000V synchronous motor trial operation；
Step 7, the 6000V synchronous motor operate normally.
Further, the step 1 further include:
Step 1.1 separates the 6000V stator of synchronous motor winding asterism tie point, is connect with measurement meter determination
One phase winding of ground；
Step 2.2 separates one phase winding parallel branch of the ground connection, determines that every pole is electric over the ground with the measurement meter
Resistance finally determines a slot winding of ground connection.
Further, the measurement meter in the step 1.1 is 2500V megameter.
Further, the step 2 further include:
Step 2.1 disconnects the tail end for the one slot winding of the ground connection that step 1 is found and throw away；
The lead manganese silver-bearing copper of the ground connection one slot winding connection is welded short circuit by step 2.2；
Step 2.3 is first wrapped up with mica tape, reusable heat contracting band wrapping point is shorted.
Further, in the step 2.3, the mica tape wraps up 8-10 layers, and the pyrocondensation belt wraps up 3 layers.
Further, the step 3 further include:
It is step 3.1, the ground connection winding hacksaw blade thrown away is sawed-off, and pry open；
Step 3.2 fills in insulation film filling in the gap that step 3.1 generates, and pours insulating resin solidification.
Further, the insulation film in the step 3.2 is the bakelite plate of 2 1mm thickness.
Further, in the step 5, the test voltage of the pressure test is chosen to be 9kV, tests the leakage electricity measured
Stream is in 0.1mA or less.
Further, in the step 6, the winding current and another two-phase winding current of a phase of ground fault occurred
Deviation ratio is below 3.6%.
Further, in the step 7, the 6000V synchronous motor can be safe and stable operation 12 months.
Compared with prior art, the present invention has the following technical effect that
1, the present invention can disconnect single-point grounding winding, quickly resume production, extend in the case where being changed without winding
The service life of motor, is preferably minimized economic loss.
2, the present invention is safe and reliable, simple and easy, low in cost, good application effect.
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
Detailed description of the invention
Fig. 1 is the schematic diagram of a preferred embodiment of the invention.
Wherein, 1- is grounded winding, and 2- is grounded winding cut-off point, and 3- is shorted point, 4- bakelite plate.
Specific embodiment
The preferred embodiment of the present invention is introduced below with reference to Figure of description, keeps its technology contents more clear and convenient for reason
Solution.The present invention can be emerged from by many various forms of embodiments, and protection scope of the present invention is not limited only to text
In the embodiment mentioned.
In the accompanying drawings, the identical component of structure is indicated with same numbers label, everywhere the similar component of structure or function with
Like numeral label indicates.The size and thickness of each component shown in the drawings are to be arbitrarily shown, and there is no limit by the present invention
The size and thickness of each component.Apparent in order to make to illustrate, some places suitably exaggerate the thickness of component in attached drawing.
As shown in Figure 1, the one of 6000V stator of synchronous motor winding single-point grounding failure speed discharge method provided by the invention
A preferred embodiment, in order to make up for the deficiencies of the prior art, the embodiment disconnect that slot winding of ground connection and get rid of, and root
According to electromagnetic induction principle, the induced current in failure winding is blocked using insulation film, reduces eddy-current heating phenomenon, other are complete
Good winding connects wrapping, quickly solves 6000V stator of synchronous motor winding single-point grounding failure, quickly resumes production,
It is minimized enterprises' loss, the specific steps are as follows:
Step 1, ground connection winding 1 is searched.Concrete operations method is: first stator of synchronous motor winding asterism tie point point
It opens, determines one phase winding of ground connection with 2500V megameter；The phase winding parallel branch is separated again, determine it is every extremely to ground resistance, most
A slot winding of ground connection is determined afterwards.
Step 2, it disconnects ground connection winding 1 and short circuit processing is done to its connecting lead wire.Concrete operations method is: the one of ground connection
The tail end of slot winding disconnects, and the lead connecting with the slot winding is welded with manganese silver-bearing copper and is shorted, and then uses mica tape point 3 is shorted
8-10 layers of wrapping, pyrocondensation belt wrap up 3 layers.
Step 3, ground connection winding 1 is prevented to be vortexed.Concrete operations method is: the ground connection winding 1 thrown away is sawed-off with hacksaw blade,
And pry open, the bakelite plate 4 for filling in 2 1mm thickness is filled, and pours insulating resin solidification, prevents eddy-current heating.
Step 4, insulation processing is carried out to ground connection winding cut-off point 2.
Step 5,6000V synchronous motor pressure test.Do pressure test with 9KV voltage, Leakage Current 0.1mA with
Under.
Step 6,6000V synchronous motor trial operation.Between trial run period, that phase winding electric current of ground fault occurred,
It only is higher by 20A or so than another biphase current, deviation ratio 3.6% within specification allowed band, and is no more than rated current.
Step 7,6000V synchronous motor operates normally.After having handled failure using this method, motor safety and stability fortune
It has gone 12 months, all technical is shown normally.
The preferred embodiment of the present invention has been described in detail above.It should be appreciated that the ordinary skill of this field is without wound
The property made labour, which according to the present invention can conceive, makes many modifications and variations.Therefore, all technician in the art
Pass through the available technology of logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Scheme, all should be within the scope of protection determined by the claims.
Claims (10)
1. a kind of 6000V stator of synchronous motor winding single-point grounding failure speed discharge method, which is characterized in that including following step
It is rapid:
Step 1 searches ground connection winding；
The ground connection winding that step 2, break step 1 are found simultaneously does short circuit processing to its connecting lead wire；
Step 3, the ground connection winding for preventing step 1 from finding generate vortex；
Step 4 carries out insulation processing to the ground connection winding cut-off point that step 2 generates；
Step 5, the 6000V synchronous motor pressure test；
Step 6, the 6000V synchronous motor trial operation；
Step 7, the 6000V synchronous motor operate normally.
2. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as described in claim 1, feature exist
In the step 1 further include:
Step 1.1 separates the 6000V stator of synchronous motor winding asterism tie point, determines ground connection one with measurement meter
Phase winding；
Step 2.2 separates one phase winding parallel branch of the ground connection, determined with the measurement meter it is every extremely to ground resistance, most
A slot winding of ground connection is determined afterwards.
3. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as claimed in claim 2, feature exist
In the measurement meter in the step 1.1 is 2500V megameter.
4. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as described in claim 1, feature exist
In the step 2 further include:
Step 2.1 disconnects the tail end for the one slot winding of the ground connection that step 1 is found and throw away；
The lead manganese silver-bearing copper of the ground connection one slot winding connection is welded short circuit by step 2.2；
Step 2.3 is first wrapped up with mica tape, reusable heat contracting band wrapping point is shorted.
5. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as claimed in claim 4, feature exist
In in the step 2.3, the mica tape wraps up 8-10 layers, and the pyrocondensation belt wraps up 3 layers.
6. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as described in claim 1, feature exist
In the step 3 further include:
It is step 3.1, the ground connection winding hacksaw blade thrown away is sawed-off, and pry open；
Step 3.2 fills in insulation film filling in the gap that step 3.1 generates, and pours insulating resin solidification.
7. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as claimed in claim 6, feature exist
In the insulation film in the step 3.2 is the bakelite plate of 2 1mm thickness.
8. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as described in claim 1, feature exist
In in the step 5, the test voltage of the pressure test is chosen to be 9kV, tests the Leakage Current measured in 0.1mA or less.
9. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as described in claim 1, feature exist
In the winding current of a phase of ground fault and the deviation ratio of another two-phase winding current occurred 3.6% in the step 6
Below.
10. 6000V stator of synchronous motor winding single-point grounding failure speed discharge method as described in claim 1, feature exist
In in the step 7, the 6000V synchronous motor can be safe and stable operation 12 months.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966532.9A CN108988590A (en) | 2018-08-23 | 2018-08-23 | A kind of 6000V stator of synchronous motor winding single-point grounding failure speed discharge method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810966532.9A CN108988590A (en) | 2018-08-23 | 2018-08-23 | A kind of 6000V stator of synchronous motor winding single-point grounding failure speed discharge method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108988590A true CN108988590A (en) | 2018-12-11 |
Family
ID=64547808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810966532.9A Pending CN108988590A (en) | 2018-08-23 | 2018-08-23 | A kind of 6000V stator of synchronous motor winding single-point grounding failure speed discharge method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108988590A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4001616A (en) * | 1974-02-18 | 1977-01-04 | Canadian General Electric Company Limited | Grounding of outer winding insulation to cores in dynamoelectric machines |
| CN104362804A (en) * | 2014-10-22 | 2015-02-18 | 白山发电厂 | Hydro-generator stator coil bar fault treatment method |
-
2018
- 2018-08-23 CN CN201810966532.9A patent/CN108988590A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4001616A (en) * | 1974-02-18 | 1977-01-04 | Canadian General Electric Company Limited | Grounding of outer winding insulation to cores in dynamoelectric machines |
| CN104362804A (en) * | 2014-10-22 | 2015-02-18 | 白山发电厂 | Hydro-generator stator coil bar fault treatment method |
Non-Patent Citations (1)
| Title |
|---|
| 梁冠英等: "异步电动机定子绕组接地故障的检查和修理", 《职业》 * |
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Application publication date: 20181211 |