CN108931443A - The warp resistance detection method of 6kV to 35kV wind generator system flexible cable - Google Patents
The warp resistance detection method of 6kV to 35kV wind generator system flexible cable Download PDFInfo
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- CN108931443A CN108931443A CN201810536965.0A CN201810536965A CN108931443A CN 108931443 A CN108931443 A CN 108931443A CN 201810536965 A CN201810536965 A CN 201810536965A CN 108931443 A CN108931443 A CN 108931443A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/22—Investigating strength properties of solid materials by application of mechanical stress by applying steady torsional forces
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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
- G01R31/12—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
- G01R31/1227—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 of components, parts or materials
- G01R31/1263—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—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 of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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Abstract
The invention discloses a kind of warp resistance detection methods of 6kV to 35kV wind generator system flexible cable, mainly include：Initial measurement, temperature control, torsion test and last qualification test, detection method of the invention reduce the length of sample, improve efficiency；Increase and detected in the case of bearing a heavy burden, actual condition can be simulated；It is detected under cold environmental conditions；Therefore the result of detection can more embody properties of product, test result more has public credibility closer to actual conditions.
Description
Technical field
The present invention relates to wire and cable the field of test technology, it particularly relates to a kind of 6kV to 35kV wind generator system
With the warp resistance detection method of flexible cable.
Background technique
To the end of the year 2010, global installed capacity of wind-driven power has reached 200,000,000 kilowatts, and existing more than 100 a countries start to develop wind-powered electricity generation,
Installed capacity is more than that 1,000,000 kilowatts of country has 20, and popularity of the wind-powered electricity generation in the whole world improves rapidly.Tire out in addition to Taiwan in China
Installed capacity of wind-driven power is counted up to 44,000,000 kilowatts, it has also become the wind-powered electricity generation big country of installed capacity the first in the world.2010, China's wind-powered electricity generation
Unit manufacturing capacity has broken through 2 000 ten thousand kilowatts, has grasped the above Wind turbines manufacturing technology of MW class, Some Enterprises 3MW with
Upper large-scale wind electricity unit also starts large-scale production, indicates that China's wind-powered electricity generation manufacturing industry starts to stride forward to enlargement, scale.
The chinese national standard of voltage rating 1.8/3kV and following torsion-resisting soft cable for wind power generation was sent out in 2013
Cloth is implemented.Cable voltage class involved in the standard is 1.8/3kV and hereinafter, generally is suitable for 2.5MW and following power wind-force
Generator uses.Voltage rating 3.6/6kV to 26/35kV torsion-resisting soft cable for wind power generation chinese national standard in
Publication in 2017 is implemented.Cable voltage class involved in the standard is 3.6/6kV to 26/35kV, generally is suitable for 3MW or more
Power wind-driven generator uses.
The maximum that the blower of the high-power blower of 3MW or more and 2.5MW or less power requires cable, which is distinguished, to be, greatly
The transformer of power Fan is on tower bucket top, therefore the voltage class for conveying the cable of resistance to torsion of electrical power is generally 6kV~35kV.
The cable product is no matter from technology content or from the safety to blower, with 2.5MW or less blower institute matched 1.8/
The cable of 3kV is compared, and is required higher.And resistance to twisting property, it is that the core capabilities of torsion-resisting soft cable for wind power generation refer to
Mark.
The voltage rating 3.6/6kV issued at present to 26/35kV torsion-resisting soft cable for wind power generation China national mark
Standard still continues to use the Chinese state of 1.8/3kV torsion-resisting soft cable for wind power generation about the detection method of the resistance to twisting property of cable
Family's standard test method.This detection method has not met actual conditions, and in practical application, 3.6/6kV presses wind into 26/35kV
The self weight of energy cable is very big, does not have weight bearing that can not simulate actual operating state in twist process.And former detection method needs
12 meters of sample, middle pressure wind energy cable cost is very high, is also a kind of burden for manufacturing enterprise's test.
Summary of the invention
For above-mentioned technical problem in the related technology, the present invention proposes a kind of 6kV to 35kV wind generator system with soft
The warp resistance detection method of cable can overcome the above-mentioned deficiency of the prior art.
To realize the above-mentioned technical purpose, the technical proposal of the invention is realized in this way：
A kind of warp resistance detection method of 6kV to 35kV wind generator system flexible cable, includes the following steps：
S1：At least 3 meters of long cable samples are intercepted from subject cable, carry out initial testing；
S2：Temperature Treatment is carried out using the sample of initial testing qualification, specially：
S2.1：The sample of initial testing qualification is completely placed in temperature-controllable cabinet；
S2.2：The intracorporal temperature of case is transferred to test temperature as defined in cable model in 1 hour；
S2.3：Sample top is fixed on torsion:After rotating clockwise 150 ° on the runner of device, placed not under test temperature
Less than 12 hours；
S3：Torsion test is carried out to the sample within the scope of the test temperature as defined in cable model, is specifically included：
S3.1：In the lower end of sample, according to cable, actually freely-suspended length carries out counterweight；
S3.2：The correct position of torsion device will be mounted on by sample is turned round, by the revolving speed control of torsion device runner 360 °/
Min~720 °/min, sample are 1 meter by length is turned round, and carry out the torsion test in several periods；
S4：Qualification test is carried out to the sample Jing Guo torsion test, judges whether tested cable is distortion resistant flexible cable.
Further, initial measurement specifically includes in step S1：
S1.1：Whether there are cracks and twisted phenomena for detection cable sample surfaces；
S1.2：The cable sample for choosing surface flawless and twisted phenomena carries out ground wire core pattern metallic shield test.
Further, the D.C. resistance for referring to test cable sample, resistance are tested in ground wire core pattern metallic shield in step S1.2
Value is no more than corresponding nominal section in GB/T 3956-2008 and provides that the cable sample of resistance value is the qualified samples of initial testing.
Further, in step S3.1, the weight of counterweight at least should be the weight of 40 meters of cables.
Further, the torsion test in each period includes in step S3.2：Rotating wheel turns round sample first clockwise
Turn 150 °, then torsion equal angular returns to original state sample counterclockwise, suitable again after 150 ° of torsion that continuation is counterclockwise
When torsion equal angular return to original state sample.
Further, the qualification test in step S4 specifically includes：
S4.1：Check that whether there are cracks and twisted phenomena for specimen surface；
S4.2：The sample of surface flawless and twisted phenomena is taken to carry out AC voltage test；
S4.3：The sample that all cores do not puncture in step S4.2 is taken to carry out shelf depreciation test；
S4.4：The sample of shelf depreciation test passes is taken to carry out metallic shield inspection, the sample of metallic shield passed examination is
Qualified distortion resistant flexible cable.
Further, in step S4.2, AC voltage test is specially that 3.5U0 voltage is utilized to test 15 points in specimen surface
Clock, wherein U0 refers to specified power-frequency voltage of the conductor of cable design over the ground or between metallic shield.
Further, in step S4.3, shelf depreciation test refers under 1.73U0 voltage, and detection cable is super whether there is or not generating
Cross statement assay sensitivity detectable electric discharge, if without if the cable be shelf depreciation test passes cable.
Further, in step S4.4, the check object of metallic shield inspection be by turn round sample by turn round length except
Position.
Further, metallic shield inspection is specially：
S4.4.1：The fracture of wire situation that oversheath checks metallic shield is stripped, the radical of fracture of wire is not to be exceeded on any cross section
Total braiding is dredged around the 5% of wire radical；
S4.4.2：The sample of fracture of wire situation qualification is taken to carry out ground wire core pattern metallic shield detection, specially：Test its direct current
Corresponding nominal section regulation resistance value is not to be exceeded in GB/T 3956-2008 in resistance, resistance value.
Beneficial effects of the present invention：Present invention test is only 1m or so by reverse part, and overall test sample is only 3m or so,
Sample length is greatly reduced, business burden is reduced.In experimentation, simulation actual condition increases to sample to bear a heavy burden, 1 meter long
Sample is subjected to the weight of at least 40 meters length cables, while corresponding cold environmental conditions are simulated on the basis of weight bearing, makes
Cable embrittlement increases test Stringency.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without creative efforts, can also obtain according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the warp resistance detection of 6kV to the 35kV wind generator system flexible cable described according to embodiments of the present invention
The flow chart of method.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art's every other embodiment obtained belong to what the present invention protected
Range.
As shown in Figure 1, a kind of 6kV to 35kV wind generator system flexible cable according to embodiments of the present invention is resistance to
Detection method is distorted, is included the following steps：
S1：At least 3 meters of long cable samples are intercepted from subject cable, carry out initial testing；
S2：Temperature Treatment is carried out using the sample of initial testing qualification, specially：
S2.1：The sample of initial testing qualification is completely placed in temperature-controllable cabinet；
S2.2：The intracorporal temperature of case is transferred to test temperature as defined in cable model in 1 hour；
S2.3：Sample top is fixed on torsion:After rotating clockwise 150 ° on the runner of device, placed not under test temperature
Less than 12 hours；
S3：Torsion test is carried out to the sample within the scope of the test temperature as defined in cable model, is specifically included：
S3.1：In the lower end of sample, according to cable, actually freely-suspended length carries out counterweight；
S3.2：The correct position of torsion device will be mounted on by sample is turned round, by the revolving speed control of torsion device runner 360 °/
Min~720 °/min, sample are 1 meter by length is turned round, and carry out the torsion test in several periods；
S4：Qualification test is carried out to the sample Jing Guo torsion test, judges whether tested cable is distortion resistant flexible cable.
In one embodiment, initial measurement specifically includes in step S1：
S1.1：Whether there are cracks and twisted phenomena for detection cable sample surfaces；
S1.2：The cable sample for choosing surface flawless and twisted phenomena carries out ground wire core pattern metallic shield test.
In one embodiment, the direct current for referring to test cable sample is tested in ground wire core pattern metallic shield in step S1.2
Resistance, resistance value are no more than corresponding nominal section in GB/T 3956-2008 and provide that the cable sample of resistance value is the conjunction of initial testing
Lattice sample.
In one embodiment, in step S3.1, the weight of counterweight at least should be the weight of 40 meters of cables.
In one embodiment, the torsion test in each period includes in step S3.2：Rotating wheel keeps sample first
150 ° of torsion clockwise, then torsion equal angular returns to original state sample counterclockwise, continues torsion counterclockwise
Up time torsion equal angular returns to original state sample again after 150 °.
In one embodiment, the qualification test in step S4 specifically includes：
S4.1：Check that whether there are cracks and twisted phenomena for specimen surface；
S4.2：The sample of surface flawless and twisted phenomena is taken to carry out AC voltage test；
S4.3：The sample that all cores do not puncture in step S4.2 is taken to carry out shelf depreciation test；
S4.4：The sample of shelf depreciation test passes is taken to carry out metallic shield inspection, the sample of metallic shield passed examination is
Qualified distortion resistant flexible cable.
In one embodiment, in step S4.2, AC voltage test is specially to utilize 3.5U0 voltage in specimen surface
Test 15 minutes, wherein U0 refers to specified power-frequency voltage of the conductor of cable design over the ground or between metallic shield.
In one embodiment, in step S4.3, shelf depreciation test refers to that under 1.73U0 voltage, detection cable has
Without generate be more than statement assay sensitivity detectable electric discharge, if without if the cable be shelf depreciation test passes
Cable.
In one embodiment, in step S4.4, the check object of metallic shield inspection is to be grown by torsion sample by torsion
Position except degree.
In one embodiment, metallic shield inspection is specially：
S4.4.1：The fracture of wire situation that oversheath checks metallic shield is stripped, the radical of fracture of wire is not to be exceeded on any cross section
Total braiding is dredged around the 5% of wire radical；
S4.4.2：The sample of fracture of wire situation qualification is taken to carry out ground wire core pattern metallic shield detection, specially：Test its direct current
Corresponding nominal section regulation resistance value is not to be exceeded in GB/T 3956-2008 in resistance, resistance value.
In order to facilitate understanding above-mentioned technical proposal of the invention, below by way of in specifically used mode to of the invention above-mentioned
Technical solution is described in detail.
A kind of 6 kV according to the present invention is to the warp resistance detection side of 35 kV wind generator system flexible cables
Method mainly includes：Initial measurement, temperature control, torsion test and last qualification test, detection method of the invention reduce
The length of sample, improves efficiency；Increase and detected in the case of bearing a heavy burden, actual condition can be simulated；Under cold environmental conditions
It is detected；Therefore the result of detection can more embody properties of product, test result more has public credibility closer to actual conditions.
In conclusion present invention test is only 1m or so by reverse part, overall test sample is only 3m or so, is substantially reduced
Sample length reduces business burden.In experimentation, simulation actual condition increases to sample to bear a heavy burden, and 1 meter of long sample need to be held
By the weight of at least 40 meters length cables, while corresponding cold environmental conditions are simulated on the basis of weight bearing, keep cable brittle,
Increase test Stringency.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
- The warp resistance detection method of 1.6kV to 35kV wind generator system flexible cable, which is characterized in that include the following steps：S1：At least 3 meters of long cable samples are intercepted from subject cable, carry out initial testing；S2：Temperature Treatment is carried out using the sample of initial testing qualification, specially：S2.1：The sample of initial testing qualification is completely placed in temperature-controllable cabinet；S2.2：The intracorporal temperature of case is transferred to test temperature as defined in cable model in 1 hour；S2.3：Sample top is fixed on torsion:After rotating clockwise 150 ° on the runner of device, placed not under test temperature Less than 12 hours；S3：Torsion test is carried out to the sample within the scope of the test temperature as defined in cable model, is specifically included：S3.1：In the lower end of sample, according to cable, actually freely-suspended length carries out counterweight；S3.2：The correct position of torsion device will be mounted on by sample is turned round, by the revolving speed control of torsion device runner 360 °/ Min~720 °/min, sample are 1 meter by length is turned round, and carry out the torsion test in several periods；S4：Qualification test is carried out to the sample Jing Guo torsion test, judges whether tested cable is distortion resistant flexible cable.
- 2. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 1, feature It is, initial measurement specifically includes in step S1：S1.1：Whether there are cracks and twisted phenomena for detection cable sample surfaces；S1.2：The cable sample for choosing surface flawless and twisted phenomena carries out ground wire core pattern metallic shield test.
- 3. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 2, feature It is, ground wire core pattern metallic shield test refers to the D.C. resistance of test cable sample in step S1.2, and resistance value is no more than GB/T Corresponding nominal section provides that the cable sample of resistance value is the qualified samples of initial testing in 3956-2008.
- 4. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 1, feature It is, in step S3.1, the weight of counterweight at least should be the weight of 40 meters of cables.
- 5. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 1, feature It is, the torsion test in each period includes in step S3.2：Rotating wheel makes sample first 150 ° of torsion clockwise, then Torsion equal angular returns to original state sample counterclockwise, and up time reverses same angular again after 150 ° of torsion that continuation is counterclockwise Degree returns to original state sample.
- 6. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 1, feature It is, the qualification test in step S4 specifically includes：S4.1：Check that whether there are cracks and twisted phenomena for specimen surface；S4.2：The sample of surface flawless and twisted phenomena is taken to carry out AC voltage test；S4.3：The sample that all cores do not puncture in step S4.2 is taken to carry out shelf depreciation test；S4.4：The sample of shelf depreciation test passes is taken to carry out metallic shield inspection, the sample of metallic shield passed examination is Qualified distortion resistant flexible cable.
- 7. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 6, feature It is, in step S4.2, AC voltage test is specially to utilize 3.5U0Voltage is tested 15 minutes in specimen surface, wherein U0It is Refer to specified power-frequency voltage of the conductor of cable design over the ground or between metallic shield.
- 8. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 7, feature It is, in step S4.3, shelf depreciation test refers in 1.73U0Under voltage, detection cable is more than the test stated whether there is or not generating The detectable electric discharge of sensitivity, if without if the cable be shelf depreciation test passes cable.
- 9. the warp resistance detection method of 6kV to 35kV wind generator system flexible cable according to claim 8, feature It is, in step S4.4, the check object of metallic shield inspection is by the position except by torsion length for turning round sample.
- 10. the warp resistance detection method of 6 kV to 35kV wind generator system flexible cable according to claim 9, special Sign is that metallic shield inspection is specially：S4.4.1：The fracture of wire situation that oversheath checks metallic shield is stripped, the radical of fracture of wire is not to be exceeded on any cross section Total braiding is dredged around the 5% of wire radical；S4.4.2：The sample of fracture of wire situation qualification is taken to carry out ground wire core pattern metallic shield detection, specially：Test its direct current Corresponding nominal section regulation resistance value is not to be exceeded in GB/T 3956-2008 in resistance, resistance value.
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| CN110595989A (en) * | 2019-08-30 | 2019-12-20 | 国网福建省电力有限公司电力科学研究院 | Cable damage test platform and method for manually simulating strong wind and coastal environment |
| CN111289387A (en) * | 2020-03-24 | 2020-06-16 | 远东电缆有限公司 | Slippage testing method for medium-high voltage wind power cable |
| CN113075055A (en) * | 2021-03-29 | 2021-07-06 | 上海南洋-藤仓电缆有限公司 | Test method for measuring anti-distortion characteristic of flat elevator cable |
| CN114354391A (en) * | 2021-12-31 | 2022-04-15 | 远东电缆有限公司 | Intelligent cable torsion test device and method for wind power generation |
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Application publication date: 20181204 |