CN107340049A - A kind of method and test device that the loosening of GIS sealing rings is judged based on vibratory drilling method - Google Patents
A kind of method and test device that the loosening of GIS sealing rings is judged based on vibratory drilling method Download PDFInfo
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- CN107340049A CN107340049A CN201710573652.8A CN201710573652A CN107340049A CN 107340049 A CN107340049 A CN 107340049A CN 201710573652 A CN201710573652 A CN 201710573652A CN 107340049 A CN107340049 A CN 107340049A
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- gis
- intrinsic frequency
- sealing rings
- characteristic value
- sealing ring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H1/00—Measuring characteristics of vibrations in solids by using direct conduction to the detector
- G01H1/12—Measuring characteristics of vibrations in solids by using direct conduction to the detector of longitudinal or not specified vibrations
- G01H1/14—Frequency
Abstract
The invention discloses a kind of method that the loosening of GIS sealing rings is judged based on vibratory drilling method, comprise the following steps：Step S1, the intrinsic frequency during fastening of GIS sealing rings is obtained, using this intrinsic frequency as referring to intrinsic frequency；Step S2, the vibration signal of GIS sealing rings is measured in real time, natural frequencies analysis is carried out to vibration signal, chooses intrinsic frequency corresponding to maximum admittance as fault characteristic value；Step S3, by this fault characteristic value compared with reference to intrinsic frequency, if fault characteristic value reduces, judge that looseness fault occurs in this GIS sealing ring.Accordingly, the invention also discloses a kind of test device that the loosening of GIS sealing rings is judged based on vibratory drilling method.The inventive method is simple, easy to operate, can interpolate that whether GIS sealing rings loosen, and certain guarantee is provided for the reliability service of gas insulated combined electrical equipment.
Description
Technical field
The present invention relates to electrical equipment technical field, and in particular to one kind judges gas insulated combined electrical equipment based on vibratory drilling method
Whether sealing ring there is the method loosened, further relates to a kind of test device based on the method.
Background technology
Compared to open combined electri cappliance, gas insulated combined electrical equipment（Abbreviation GIS）It is small with floor space, reliability
The advantages that height, good insulation preformance, maintenance workload are few, that is applied in power system is more and more.With the increasing of service life
Add, its failure situation is more and more, and GIS failure is broadly divided into insulation fault and mechanical breakdown.At present, both at home and abroad on GIS
The research of failure is concentrated mainly in insulation class failure, and relative maturity, the research for mechanical failure are relatively fewer.
Vibration is an inherent characteristic of power equipment, can reflect low-frequency vibration caused by mechanical breakdown, can also reflect
Dither caused by insulation fault.So the mechanical breakdown based on vibratory drilling method detection GIS device has certain research meaning
Justice.In vibratory drilling method detection process, GIS device is monitored by the vibration acceleration sensor on GIS device shell in real time
Running status.So when with the state of vibratory drilling method detection device, pass through the vibration signal that vibration acceleration sensor obtains
It is particularly important.
In the mechanical breakdown of GIS device, it is a kind of relatively common phenomenon that sealing ring, which loosens,.The sealing of GIS device
It is the important step for ensureing GIS device safe operation, if sealing effectiveness is bad SF6 gases can be caused to leak, pressure declines, so as to
Cause GIS critical failure.
At present, for the sealing ring looseness fault of GIS device, also without definite method, so, loosened for sealing ring
Checkout and diagnosis be particularly important, and finding a kind of fast and effectively determination methods has necessary practical value.
The content of the invention
It is an object of the invention to overcome deficiency of the prior art, there is provided a kind of to judge that GIS is sealed based on vibratory drilling method
The method and test device loosened is enclosed, first measures each rank intrinsic frequency corresponding to the vibration signal acquisition of GIS sealing rings, selection is most
Intrinsic frequency corresponding to big admittance judges whether GIS sealing rings loosen as fault characteristic value, with this fault characteristic value.
In order to solve the above technical problems, the invention provides it is a kind of based on vibratory drilling method judge GIS sealing rings loosen method,
It is characterized in that comprise the following steps：
Step S1, the intrinsic frequency during fastening of GIS sealing rings is obtained, using this intrinsic frequency as referring to intrinsic frequency；
Step S2, the vibration signal of GIS sealing rings is measured in real time, natural frequencies analysis is carried out to vibration signal, choose maximum and lead
Intrinsic frequency is as fault characteristic value corresponding to receiving；
Step S3, by this fault characteristic value compared with reference to intrinsic frequency, if fault characteristic value reduces, judge this GIS
There is looseness fault in sealing ring.
Further, several vibration signal measuring points are provided with GIS sealing rings surface.
Further, this vibration signal is measured using vibration acceleration sensor, and this vibration acceleration sensor is arranged on
At GIS sealing ring marginal surfaces.
Accordingly, present invention also offers a kind of test device that the loosening of GIS sealing rings is judged using the above method, it is special
Sign is, including is loosened with reference to intrinsic frequency acquisition module, vibration measurement module, fault characteristic value extraction module and sealing ring
Judge module；
With reference to intrinsic frequency acquisition module, the intrinsic frequency during fastening of GIS sealing rings is obtained, using this intrinsic frequency as with reference to solid
There is frequency, be transferred to sealing ring and loosen judge module；
Vibration measurement module, measures the vibration signal of GIS sealing rings in real time, and this vibration signal is transferred into fault signature
Measure extraction module；
Fault characteristic value extraction module, natural frequencies analysis is carried out to vibration signal, chooses intrinsic frequency corresponding to maximum admittance
As fault characteristic value, and this fault characteristic value is transferred to sealing ring and loosens judge module；
Sealing ring loosens judge module, by fault characteristic value compared with reference to intrinsic frequency, if fault characteristic value reduces,
Judge that looseness fault occurs in this GIS sealing ring.
Further, several vibration signal measuring points are provided with GIS sealing rings surface.
Further, this vibration signal is measured using vibration acceleration sensor, and this vibration acceleration sensor is arranged on
At GIS sealing ring marginal surfaces.
Compared with prior art, the beneficial effect that is reached of the present invention is：The vibration signal that the present invention passes through GIS sealing rings
Each rank intrinsic frequency corresponding to acquisition, and intrinsic frequency corresponding to maximum admittance is chosen as fault characteristic value, according to this failure
, to judge whether GIS sealing rings loosen, if reducing, there is looseness fault in characteristic quantity and the contrast with reference to intrinsic frequency,
And the amplitude reduced is bigger, then sealing ring loosens more serious.The inventive method is simple, easily realizes, is gas insulated combined electrical equipment
Reliability service provide certain guarantee.
Brief description of the drawings
Fig. 1 is the flow chart of the inventive method；
Fig. 2 is test device schematic diagram in the embodiment of the present invention；
Fig. 3 is the distribution schematic diagram of the vibration signal measuring point of test device in Fig. 2；
Fig. 4 is the experiment process flow diagram flow chart of test device in Fig. 2；
Fig. 5 is fault characteristic value and the graph of a relation of aeration level when test device loosens a bolt in Fig. 2；
Fig. 6 is fault characteristic value and the graph of a relation of aeration level when test device loosens all bolts in Fig. 2.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in figure 1, a kind of method that the loosening of GIS sealing rings is judged based on vibratory drilling method of the present invention, is comprised the following steps：
Step S1, the intrinsic frequency during fastening of GIS sealing rings is obtained, using this intrinsic frequency as referring to intrinsic frequency；
Step S2, after GIS device uses a period of time, the vibration signal of GIS sealing rings is measured in real time, vibration signal is carried out
Natural frequencies analysis, intrinsic frequency corresponding to maximum admittance is chosen as fault characteristic value；
Step S3, by fault characteristic value compared with reference to intrinsic frequency, if fault characteristic value reduces, judge that this GIS is close
There is looseness fault in seal.
The present invention chooses maximum admittance pair by each rank intrinsic frequency corresponding to the vibration signal acquisition of GIS sealing rings
The intrinsic frequency answered is as fault characteristic value, according to this fault characteristic value and the contrast with reference to intrinsic frequency, to judge that GIS is sealed
Whether circle loosens, if reducing, looseness fault occurs, and the amplitude reduced is bigger, then sealing ring loosens more serious.
In order to verify the validity of the inventive method, following testing experiment is carried out.Judge the test dress that GIS sealing rings loosen
Put including vibration acceleration sensor, impulsive force hammer and data collecting instrument, referring specifically to Fig. 2.Vibration acceleration sensor is installed
In sealing ring ambient envelope, for gathering the vibration signal on GIS sealing rings surface, its model CA-YD-182（Sensitivity is
20mV/g）.Impulsive force hammer is for carrying out the carry out exciter test to GIS sealing rings, and chooses the central point of GIS sealing rings
As beating point.Data collecting instrument can be acquired to acceleration signal, voltage, current signal etc., and inside carries a variety of filters
Ripple device, simple process can be carried out to signal.
In this experiment, 4 vibration acceleration sensors, corresponding 4 vibrations measuring point, vibration are installed around sealing ring
The installation site of acceleration transducer is as shown in figure 3, wherein 1,2, No. 3 measuring point is respectively positioned on sealing ring surface, and No. 4 measuring points are positioned at close
The seal back side（Positioned at the back side of No. 1 measuring point, it is not shown in this figure）.
GIS sealing effectiveness depends on the welding quality and the manufacture of sealing ring of tank body, installation and flange sealing surface
Docking, and the tightness of sealing surface docking situation and bolt is closely related.Therefore in this testing experiment, using loose bolts come
Adjust the different degrees of loosening of GIS sealing rings.As shown in figure 4, specific experiment process is：
（1）Different degrees of loosening is set on GIS sealing rings, and sealing ring, which loosens experiment, to be realized by setting nut loosening
, such as the number of loose nut, length difference；
Before remembering loose nut, i.e., the normal condition that all nuts fasten is situation A, and chooses the sealings of the GIS under this situation A
The intrinsic frequency of circle is used as and refers to intrinsic frequency.Intrinsic frequency when this GIS sealing ring fastens can be provided from GIS device
Obtain in technical parameter or obtained using above-mentioned vibration acceleration sensor measurement.This example first loosens a nut,
And it is 2mm and 5mm to loosen length（It is designated as situation B and situation C）；Then all nuts are loosened, and it is respectively 2mm to loosen length
And 5mm（It is designated as situation D and situation E）.
（2）For each situation, i.e., when the number of nut loosening and length are in a certain state, are hammered into shape and tapped with impulsive force
The center of sealing ring carries out exciter test, and corresponding 4 vibrations measuring point is provided with around sealing ring, obtains each measuring point
Vibration signal.And 3 experiments are carried out in testing to homologous state, are to take 3 average values tested as the examination under this state
Test result, it is therefore an objective to avoid single experiment from the influence of accidentalia being present, experimental result is had more convincingness, improve measurement essence
Degree.
（3）The vibration signal measured for different measuring points, natural frequencies analysis is carried out to it, obtained each under every kind of state
The intrinsic frequency characteristic response curve of measuring point, each rank intrinsic frequency of sealing ring is obtained according to resonance principle（Pass through input
Force signal and the vibration signal measured carry out passing letter analysis, obtain each rank intrinsic frequency）；
（4）By observation analysis, sealing ring looseness fault for natural frequencies effect characteristicses and unobvious, selected from most
Big admittanceY max Corresponding intrinsic frequency（It is designated asf m ）It is compared as fault characteristic value；Draw out and respectively surveyed under different situations
Point vibration signalf m With the line chart of sealing ring aeration level corresponding relation, difference is as shown in Figure 5 and Figure 6.
Intrinsic frequencies of the Fig. 5 and Fig. 6 respectively corresponding to the full pine of one nut of loosening and all nuts is with aeration level
Variation relation, and 1,2,3, No. 4 measuring point is analyzed.Fig. 5 and Fig. 6 line chart is observed, when sealing ring is in just
During normal state, i.e., no nut loosening, intrinsic frequency corresponding at its admittance maximum is 2010 Hz or so, when nut occurs
During looseness fault, the intrinsic frequency corresponding to admittance maximum reduces.If during an only nut loosening（Fig. 5）, it is corresponding
Intrinsic frequency reduces with the increase of aeration level, but it not is apparent to change；If all nuts all loosen, admittance
Intrinsic frequency corresponding to maximum declines obvious.
Compare Fig. 5 and Fig. 6, the number of sealing ring surface nut loosening and the length of loosening can all make it that maximum admittance is corresponding
Intrinsic frequency reduce, the number of loosening is more, the length that loosens is longer, this phenomenon change will be more obvious.
Therefore choose intrinsic frequency corresponding to maximum admittance as fault characteristic value, by its with reference to intrinsic frequency（Normally
Situation, i.e. situation A）It is compared, it can be determined that whether gas insulated combined electrical equipment occurs looseness fault.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and modification can also be made, these improvement and modification
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of method that the loosening of GIS sealing rings is judged based on vibratory drilling method, it is characterized in that, comprise the following steps：
Step S1, the intrinsic frequency during fastening of GIS sealing rings is obtained, using this intrinsic frequency as referring to intrinsic frequency；
Step S2, the vibration signal of GIS sealing rings is measured in real time, natural frequencies analysis is carried out to vibration signal, choose maximum and lead
Intrinsic frequency is as fault characteristic value corresponding to receiving；
Step S3, by this fault characteristic value compared with reference to intrinsic frequency, if fault characteristic value reduces, judge this GIS
There is looseness fault in sealing ring.
2. a kind of method that the loosening of GIS sealing rings is judged based on vibratory drilling method according to claim 1, it is characterized in that, in GIS
Sealing ring surface is provided with several vibration signal measuring points.
3. a kind of method that the loosening of GIS sealing rings is judged based on vibratory drilling method according to claim 1, it is characterized in that, this shakes
Dynamic signal is measured using vibration acceleration sensor, and this vibration acceleration sensor is arranged at GIS sealing ring marginal surfaces.
4. a kind of test device that the loosening of GIS sealing rings is judged based on vibratory drilling method based on any one of power 1-3 methods described, it is special
Sign is, including is loosened with reference to intrinsic frequency acquisition module, vibration measurement module, fault characteristic value extraction module and sealing ring
Judge module；
With reference to intrinsic frequency acquisition module, the intrinsic frequency during fastening of GIS sealing rings is obtained, using this intrinsic frequency as with reference to solid
There is frequency, be transferred to sealing ring and loosen judge module；
Vibration measurement module, measures the vibration signal of GIS sealing rings in real time, and this vibration signal is transferred into fault signature
Measure extraction module；
Fault characteristic value extraction module, natural frequencies analysis is carried out to vibration signal, chooses intrinsic frequency corresponding to maximum admittance
As fault characteristic value, and this fault characteristic value is transferred to sealing ring and loosens judge module；
Sealing ring loosens judge module, by fault characteristic value compared with reference to intrinsic frequency, if fault characteristic value reduces,
Judge that looseness fault occurs in this GIS sealing ring.
5. a kind of test device that the loosening of GIS sealing rings is judged based on vibratory drilling method according to claim 4, it is characterized in that,
Several vibration signal measuring points are provided with GIS sealing rings surface.
6. a kind of test device that the loosening of GIS sealing rings is judged based on vibratory drilling method according to claim 4, it is characterized in that,
This vibration signal is measured using vibration acceleration sensor, and this vibration acceleration sensor is arranged on GIS sealing ring marginal surfaces
Place.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710573652.8A CN107340049A (en) | 2017-07-14 | 2017-07-14 | A kind of method and test device that the loosening of GIS sealing rings is judged based on vibratory drilling method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710573652.8A CN107340049A (en) | 2017-07-14 | 2017-07-14 | A kind of method and test device that the loosening of GIS sealing rings is judged based on vibratory drilling method |
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| CN107340049A true CN107340049A (en) | 2017-11-10 |
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| CN201710573652.8A Pending CN107340049A (en) | 2017-07-14 | 2017-07-14 | A kind of method and test device that the loosening of GIS sealing rings is judged based on vibratory drilling method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631790A (en) * | 2019-09-25 | 2019-12-31 | 歌尔科技有限公司 | Wearable device and detection method thereof |
| CN111474241A (en) * | 2020-06-10 | 2020-07-31 | 国网山西省电力公司电力科学研究院 | Method for evaluating latent fault factors existing in GIS structural state |
| CN113030257A (en) * | 2021-02-26 | 2021-06-25 | 天地上海采掘装备科技有限公司 | Method for detecting looseness of long screw rod assembly of mining machine body and method for overhauling long screw rod assembly |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110631790A (en) * | 2019-09-25 | 2019-12-31 | 歌尔科技有限公司 | Wearable device and detection method thereof |
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| CN111474241A (en) * | 2020-06-10 | 2020-07-31 | 国网山西省电力公司电力科学研究院 | Method for evaluating latent fault factors existing in GIS structural state |
| CN113030257A (en) * | 2021-02-26 | 2021-06-25 | 天地上海采掘装备科技有限公司 | Method for detecting looseness of long screw rod assembly of mining machine body and method for overhauling long screw rod assembly |
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