CN109752172A - A kind of high voltage isolator machinery bite monitoring method and device - Google Patents
A kind of high voltage isolator machinery bite monitoring method and device Download PDFInfo
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- CN109752172A CN109752172A CN201910019644.8A CN201910019644A CN109752172A CN 109752172 A CN109752172 A CN 109752172A CN 201910019644 A CN201910019644 A CN 201910019644A CN 109752172 A CN109752172 A CN 109752172A
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Abstract
The invention discloses a kind of high voltage isolator machinery bite monitoring method and device, monitoring method implementation steps include detecting the actual measurement torque and angle data of tested high voltage isolator output shaft during breaking-closing operating；The torque and angle data that survey torque and angle data and preset normal condition are compared and determine whether tested high voltage isolator occurs mechanical jam faults；Monitoring device includes rotation angle of torque measuring unit, data sink and the computer equipment for being programmed to perform aforementioned monitoring method.The present invention is based on the output datas that torque monitoring, corner monitor to realize expert diagnosis analysis, objective, accurately can judge disconnecting switch state, analyze potential faults early.Its state can be detected as long as having breaking-closing operating after it puts into operation, analyze the variation tendency of its important parameter to predict whether defective presence, to provide scientific basis for repair based on condition of component, improve power grid power supply reliability.
Description
Technical field
The present invention relates to disconnecting switch transmission parts fault detection and diagnosis fields, and in particular to a kind of high voltage isolator
Mechanical bite monitoring method and device.
Background technique
Outdoor disconnector transmission link, which is directly exposed to undergo in atmosphere, to expose to the sun and rain, and driving joint is easy because of corruption
Erosion, dust and lubrication failure and bite, lead to the inseparable failure that do not close often occur, it is reliable to seriously threaten power grid security
Operation.However, the bite of driving joint is not formed overnight, it is a slow process by quantitative change to qualitative change.Only
There is the degree for monitoring bite at any time, is before alarmed and tieed up in time in place when bite occur and influence disconnecting switch divide-shut brake enough
It repairs, so that it may eliminate or reduce the generation of disconnecting switch accident.Existing the matched motor drive mechanism of disconnecting switch is intended only as disconnecting switch
The power device of divide-shut brake does not have mechanical bite detection function.
At present both at home and abroad to none effective monitoring means of high voltage isolator machinery jam faults, product can only be relied on
Existing quality and antiseptic property and field personnel's subjective experience and technical capability cannot promptly and accurately judge potential machinery
Failure, often but operation failure due to mechanical breakdown when in use, seriously affects power supply reliability and electric power netting safe running.Cause
How this, realize the mechanical bite detection of isolator operating mechanism, have become a key technical problem urgently to be resolved.
Summary of the invention
The technical problem to be solved in the present invention: in view of the above problems in the prior art, a kind of high voltage isolator machine is provided
Tool bite monitoring method and device, the present invention, which can be realized the on-line monitoring of disconnecting switch machinery bite and diagnosis, makes mechanical bite
The early early processing of discovery, provides scientific basis for repair based on condition of component, also can be used as equipment day-to-day operation state evaluation foundation.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention are as follows:
A kind of high voltage isolator machinery bite monitoring method, implementation steps include:
1) detect tested the high voltage isolator torque of output shaft and corner during breaking-closing operating obtain actual measurement torque with
And angle data；
2) torque and angle data that survey torque and angle data and preset normal condition are compared determining quilt
Survey whether high voltage isolator occurs mechanical jam faults.
Abscissa is corner in the actual measurement torque and angle data generated in step 1), ordinate is torque.
The detailed step of the mechanical breakdown type of relatively more determining tested high voltage isolator includes: in step 2
2.1) the torque average value of actual measurement torque and angle data is calculated；
2.2) the torque average value of actual measurement torque and angle data, the torque and angle data of preset normal condition are calculated
Torque average value between ratio；
2.3) judge whether ratio is more than preset threshold, if it exceeds preset threshold, then determine to be tested high voltage isolator
Mechanical jam faults；Otherwise, it is determined that mechanical jam faults do not occur for tested high voltage isolator.
Further include in step 2.3) detection actual measurement torque and angle data absolute presupposition normal condition torque and
Whether angle data integrally translates up, and exposed turn of output shaft of tested high voltage isolator is determined if integrally translating up
Clamping stagnation occurs for the pivot pin of dynamic part or inner rotation part.
Further include in step 2.3) detection actual measurement torque and angle data absolute presupposition normal condition torque and
Whether local angle data difference is obvious, if local difference obviously if determine the apparent angular position card of local difference
It is stagnant.
Step 2.3) is middle to determine to further include exporting mechanical bite event when machinery jam faults occur for tested high voltage isolator
The treatment advice of barrier.
The present invention provides a kind of high voltage isolator machinery bite monitoring device, including computer equipment, further includes being used for
Acquire the rotation angle of torque measuring unit of torque and corner information, for receiving and forwarding the data of torque and corner information to connect
Receiving apparatus is connected between the rotation angle of torque measuring unit, data sink by wireless network, the data sink
It is connected with computer equipment, the computer equipment is programmed to perform aforementioned high voltage isolator machinery bite monitoring method
Step.
The rotation angle of torque measuring unit includes torque sensor, analog-to-digital conversion module, rotary angle transmitter, the first processing
The output end of device, wireless sending module and the first power module, the torque sensor passes through analog-to-digital conversion module and first
The input terminal of processor is connected, and the output end of the rotary angle transmitter is connected with the input terminal of first processor, at described first
Reason device is connected by wireless sending module with data sink, the output end of first power module respectively with torque sensing
Device, analog-to-digital conversion module, rotary angle transmitter, first processor, wireless sending module are connected.
The data sink includes wireless receiving module, second processor, Upper machine communication module and second source
Module is connected between the wireless receiving module and rotation angle of torque measuring unit by wireless network, the second processor point
Be not connected with wireless receiving module, Upper machine communication module, the output end of the second power supply module respectively with wireless receiving mould
Block, second processor, Upper machine communication module are connected, and the Upper machine communication module is connected with computer equipment.
The present invention provides a kind of high voltage isolator machinery bite monitoring device, comprising:
Curve generator unit, for detect tested high voltage isolator during breaking-closing operating the torque of output shaft and
Corner simultaneously generates actual measurement torque and angle data；
Tracing analysis diagnostic program unit will survey the torque and corner of torque and angle data and preset normal condition
Data, which are compared, determines whether tested high voltage isolator occurs mechanical jam faults.
Compared to the prior art, the present invention has an advantage that the present invention is based on the output numbers of torque monitoring, corner monitoring
According to expert diagnosis analysis is realized, objective, accurately disconnecting switch state can be judged, analyze potential faults early.When
It can detect its state as long as having breaking-closing operating after putting into operation, and the variation tendency for analyzing its important parameter is come in advance
Survey whether defective presence, to provide scientific basis for repair based on condition of component, raising power grid power supply reliability.
Detailed description of the invention
Fig. 1 is the basic procedure schematic diagram of present invention method.
Fig. 2 is the structural schematic diagram of the device of that embodiment of the invention.
Fig. 3 is the structural schematic diagram of rotation angle of torque measuring unit in the embodiment of the present invention.
Fig. 4 is the structural schematic diagram of data sink in the embodiment of the present invention.
Fig. 5 be the embodiment of the present invention in actual measurement torque and angle data schematic diagram (superposition normal condition torque with
And angle data).
Marginal data: 1, computer equipment；2, rotation angle of torque measuring unit；21, torque sensor；22, analog-to-digital conversion mould
Block；23, rotary angle transmitter；24, first processor；25, wireless sending module；26, the first power module；3, data receiver fills
It sets；31, wireless receiving module；32, second processor；33, Upper machine communication module；34, second power supply module.
Specific embodiment
As shown in Figure 1, the implementation steps that the present embodiment proposes high voltage isolator machinery bite monitoring method include:
1) detect tested the high voltage isolator torque of output shaft and corner during breaking-closing operating obtain actual measurement torque with
And angle data；
2) torque and angle data that survey torque and angle data and preset normal condition are compared determining quilt
Survey whether high voltage isolator occurs mechanical jam faults.
In the present embodiment, torque and angle data are (including actual measurement torque and angle data, preset normal condition
Torque and angle data) it is specially torsion curve (M- θ curve), abscissa is rotational angle theta, ordinate is torque M,
It should be understood that torsion curve is only a kind of specific manifestation form of torque and angle data, it is right
For those skilled in the art, as long as can ensure that torque and angle data can obtain the data between torque-corner
Corresponding relationship, data mode can use other forms.
The present embodiment proposes the output data that high voltage isolator machinery bite monitoring method is monitored based on torque monitoring, corner
Expert diagnosis analysis is realized, objective, accurately disconnecting switch state can be judged, analyze potential faults early.When it
Its state can be detected as long as having breaking-closing operating after putting into operation, analyze the variation tendency of its important parameter to predict
Whether defective presence to provide scientific basis for repair based on condition of component improves power grid power supply reliability.
In the present embodiment, abscissa is corner in the actual measurement torque and angle data that generate in step 1), ordinate is
Torque.
In the present embodiment, the detailed step packet of the mechanical breakdown type of tested high voltage isolator is relatively determined in step 2
It includes:
2.1) the torque average value of actual measurement torque and angle data is calculated；
2.2) the torque average value of actual measurement torque and angle data, the torque and angle data of preset normal condition are calculated
Torque average value between ratio；
2.3) judge whether ratio is more than preset threshold, if it exceeds preset threshold, then determine to be tested high voltage isolator
Mechanical jam faults；Otherwise, it is determined that mechanical jam faults do not occur for tested high voltage isolator.
As shown in figure 5, actual measurement torque and the torque average value of angle data (a), preset normal condition torque with
And the ratio between the torque average value of angle data (b) is 176%, has been more than preset threshold, therefore, it is determined that tested high_voltage isolation
Mechanical jam faults occur for switch.It surveys in torque and angle data (a), the corresponding corner of crest location is 92 °, and torque is
292.5N.m, the torque maximum of crest location occur during conductive arm overturning, remaining section torque is smaller.
It further include the normal condition of detection actual measurement torque and angle data absolute presupposition in the present embodiment, in step 2.3)
Torque and angle data whether integrally translate up, the defeated of tested high voltage isolator is determined if integrally translating up
Clamping stagnation occurs for the exposed rotating part of shaft or the pivot pin of inner rotation part.Wherein, it integrally translates up and specifically refers to survey
Torque and angle data, the torque difference of the torque of normal condition and angle data between the two are more than turning for preset threshold
Angle Position is more than preset ratio, such as output shaft 10 rotates ± 180 ° when divide-shut brake, turns round if it exceeds 90% angular position is surveyed
Square and angle data, the torque difference of the torque of normal condition and angle data between the two are more than preset threshold
The torque and angle data for determining the normal condition of actual measurement torque and angle data absolute presupposition integrally translate up.
It further include the normal condition of detection actual measurement torque and angle data absolute presupposition in the present embodiment, in step 2.3)
Torque and the whether local difference of angle data it is obvious, if local difference obviously if determine the apparent corner position of local difference
Set generation clamping stagnation.Wherein, local difference obviously specifically refer to actual measurement torque and angle data, normal condition torque and turn
The torque difference of angular data between the two is more than preset threshold.
Determining that tested high voltage isolator occurs in the present embodiment, in step 2.3) further includes output when mechanical jam faults
The treatment advice of mechanical jam faults.In the present embodiment, the torque average value, preset of torque and angle data (a) is surveyed
Ratio between the torque of normal condition and the torque average value of angle data (b) is 176%, exports mechanical jam faults
Treatment advice are as follows: torque load increase clearly, please apply now power failure plan and be handled.Moreover, because actual measurement torque
And integrally translated up between the torque and angle data of the normal condition of angle data absolute presupposition, it is therefore proposed that externally
The pivot pin of dew rotating part carries out disintegration cleaning, lubrication, needs if the torque of operation is not obviously improved to inside after lubrication
It cleaned, lubricated in rotating shaft pin position.Due to actual measurement torque and angle data absolute presupposition normal condition torque with
And local difference is obvious between angle data, it is therefore proposed that carrying out emphasis to the apparent angular position of local difference checks for card
It is stagnant.The present embodiment show that early warning value and maintenance refer to by the analysis for whether having corresponding characteristic spectrum to emulation and detection data
The property led opinion, patent diagnostic system may be mounted in field measurement apparatus to be checked at any time, also may be mounted in the computer of backstage
For checking, analyzing, generating printing service bulletin.Patent diagnostic system will measure the curve of gained torque and same history song
Line is compared in the same coordinate system, can also further study influence of the various factors to relation curve, as burn into lubricates
The reason of failure, spring pressure change, rotational angle changes etc., analyze its change in torque and early warning value, obtain corresponding maintenance
Instruction.
As shown in Fig. 2, the present embodiment provides a kind of high voltage isolator machinery bite monitoring device, including computer equipment
1, it further include for acquiring the rotation angle of torque measuring unit 2 of torque and corner information, for receiving and forwarding torque and turn
The data sink 3 of angle information is connected between rotation angle of torque measuring unit 2, data sink 3 by wireless network, number
It is connected according to reception device 3 with computer equipment, computer equipment 1 is programmed to perform aforementioned high voltage isolator machinery bite prison
The step of survey method.It is connected between rotation angle of torque measuring unit 2, data sink 3 by wireless network, and mechanism divide-shut brake
When main shaft rotate ± 180 °, between rotation angle of torque measuring unit 2, data sink 3 signal transmission if with cable transmission
Cable easily snaps off, and wireless transmission can solve this problem.
As shown in figure 3, rotation angle of torque measuring unit 2 includes torque sensor 21, analog-to-digital conversion module 22, rotary angle transmitter
23, first processor 24, wireless sending module 25 and the first power module 26, the output end of torque sensor 21 pass through modulus
Conversion module 22 is connected with the input terminal of first processor 24, the input of the output end and first processor 24 of rotary angle transmitter 23
End is connected, and first processor 24 is connected by wireless sending module 25 with data sink 3, the output of the first power module 26
End respectively with torque sensor 21, analog-to-digital conversion module 22, rotary angle transmitter 23, first processor 24, wireless sending module 25
It is connected.In the present embodiment, 21 resistance-strain type torque sensor of torque sensor, structure is simple, precision is high, reproducible.
Torque sensor 21 is serially connected on output shaft 10, measurement result can reflect the variation of 10 torque of output shaft.Rotation angular sensing
Device 23 carries out main axis angle measurement, and also there are many schemes, such as photoelectric sensor, encoder, potentiometer.Due to being in case
Install that its space is smaller, rotary angle transmitter 23 selects attitude transducer small in size, easy for installation (gyroscope) in the present embodiment.
When rotary angle transmitter 23 rotates together with output shaft 10, internal circuit will calculate rotation angle, and be converted into digital letter
Number output.In the present embodiment, first processor 24 is single-chip microcontroller, and furthermore first processor 24 also can according to need using other
Microprocessor.
The major function of data sink 3 is carried out wireless communication with sending device, and torque and angle data are passed through
Interface circuit send to host computer and carries out subsequent processing.As shown in figure 4, data sink 3 includes wireless receiving module 31, second
Processor 32, Upper machine communication module 33 and second power supply module 34, wireless receiving module 31 and rotation angle of torque measuring unit 2 it
Between by wireless network be connected, second processor 32 is connected with wireless receiving module 31, Upper machine communication module 33 respectively, second
The output end of power module 34 is connected with wireless receiving module 31, second processor 32, Upper machine communication module 33 respectively, upper
Machine communication module 33 is connected with computer equipment 1.In the present embodiment, second processor 32 is single-chip microcontroller, Upper machine communication module
33 specifically use RS232 serial communication module, and furthermore second processor 32 also can according to need using other microprocessors, on
Position machine communication module 33 also can according to need using other communication modules.Wireless sending module 25 and wireless receiving module 31 can
To use the home control network communication protocols such as bluetooth, WiFi to carry out data transmission as needed.
The present embodiment high voltage isolator machinery bite monitoring device, which is directed to, does not at present have high voltage isolator mechanical property
There is dedicated on-line measurement device status, the small space in existing mechanism case is suitable for by research, torque and rotation angular sensing are installed
Device measures the important parameters such as the torque of disconnecting switch, and disconnecting switch driving joint bite necessarily leads to motor drive mechanism
It operates torque to increase, therefore monitor motor drive mechanism operation torque can directly reflect the variation degree of bite, be provided for repair based on condition of component
Reliable scientific basis.Measurement number of the application method of the present embodiment high voltage isolator machinery bite monitoring device for acquisition
According to drawing out torque and angle data automatically, and automatically analyze out the torque and angle data and normal condition of this equipment
Torque and angle data (history torque and angle data) difference, capable of emitting early warning, to be provided for repair based on condition of component
Scientific basis also can be used as equipment day-to-day operation state evaluation foundation.
In addition, the present embodiment provides a kind of high voltage isolator machinery bite monitoring devices, comprising:
Curve generator unit, for detect tested high voltage isolator during breaking-closing operating the torque of output shaft and
Corner simultaneously generates actual measurement torque and angle data；
Tracing analysis diagnostic program unit will survey the torque and corner of torque and angle data and preset normal condition
Data, which are compared, determines whether tested high voltage isolator occurs mechanical jam faults.
Abscissa is corner in the actual measurement torque and angle data that curve generator unit generates, ordinate is torsion
Square.
Tracing analysis diagnostic program unit relatively determines that the mechanical breakdown type of tested high voltage isolator includes following moulds
Block:
Torque mean computation routine module, for calculating the torque average value of actual measurement torque and angle data；
Torque toaverage ratio calculation procedure module, for calculating the torque average value of actual measurement torque and angle data, presetting
The torque of normal condition and the torque average value of angle data between ratio；
Torque toaverage ratio determining program module, for judging whether ratio is more than preset threshold, if it exceeds preset threshold,
Then determine that mechanical jam faults occur for tested high voltage isolator；Otherwise, it is determined that mechanical card does not occur for tested high voltage isolator
Puckery failure.
In the present embodiment, torque toaverage ratio determining program module further includes detection actual measurement torque and angle data phase
The subroutine module whether torque and angle data to preset normal condition integrally translate up, if whole flat upwards
It moves the then subroutine module and determines the exposed rotating part of output shaft of tested high voltage isolator or the axis of inner rotation part
Clamping stagnation occurs for pin.
In the present embodiment, torque toaverage ratio determining program module further includes detection actual measurement torque and angle data phase
Torque and angle data to preset normal condition whether the apparent subroutine module of local difference, if local difference is bright
The aobvious then subroutine module determines that clamping stagnation occurs for the local apparent angular position of difference.
In the present embodiment, torque toaverage ratio determining program module further includes determining to be tested high voltage isolator
The treatment advice output subroutine module of the treatment advice of mechanical jam faults is exported when mechanical jam faults.
The above is only a preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-mentioned implementation
Example, all technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
Those of ordinary skill for, several improvements and modifications without departing from the principles of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of high voltage isolator machinery bite monitoring method, it is characterised in that implementation steps include:
1) detect tested the high voltage isolator torque of output shaft and corner during breaking-closing operating obtain actual measurement torque with
And angle data；
2) torque and angle data that survey torque and angle data and preset normal condition are compared determining quilt
Survey whether high voltage isolator occurs mechanical jam faults.
2. high voltage isolator machinery bite monitoring method according to claim 1, which is characterized in that generated in step 1)
Actual measurement torque and angle data in abscissa be corner, ordinate is torque.
3. high voltage isolator machinery bite monitoring method according to claim 1, which is characterized in that compare in step 2
The detailed step for determining the mechanical breakdown type of tested high voltage isolator includes:
2.1) the torque average value of actual measurement torque and angle data is calculated；
2.2) the torque average value of actual measurement torque and angle data, the torque and angle data of preset normal condition are calculated
Torque average value between ratio；
2.3) judge whether ratio is more than preset threshold, if it exceeds preset threshold, then determine to be tested high voltage isolator
Mechanical jam faults；Otherwise, it is determined that mechanical jam faults do not occur for tested high voltage isolator.
4. high voltage isolator machinery bite monitoring method according to claim 3, which is characterized in that in step 2.3) also
Whether the torque and angle data of the normal condition including detection actual measurement torque and angle data absolute presupposition are whole upwards
Translation determines the exposed rotating part of output shaft or inner rotating portion of tested high voltage isolator if integrally translating up
Clamping stagnation occurs for the pivot pin divided.
5. high voltage isolator machinery bite monitoring method according to claim 3, which is characterized in that in step 2.3) also
The whether local difference of the torque and angle data of normal condition including detection actual measurement torque and angle data absolute presupposition
Obviously, if local difference obviously if determine that clamping stagnation occurs for the apparent angular position of local difference.
6. according to high voltage isolator machinery bite monitoring method described in claim 3 or 4 or 5, which is characterized in that step
2.3) determine that when mechanical jam faults occur for tested high voltage isolator further include the treatment advice for exporting mechanical jam faults in.
7. a kind of high voltage isolator machinery bite monitoring device, including computer equipment (1), which is characterized in that further include using
In the rotation angle of torque measuring unit (2) of acquisition torque and corner information, for receiving and forwarding torque and corner information
Data sink (3) is connected between the rotation angle of torque measuring unit (2), data sink (3) by wireless network,
The data sink (3) is connected with computer equipment, and the computer equipment (1) is programmed to perform claim 1~6
Any one of described in high voltage isolator machinery bite monitoring method the step of.
8. high voltage isolator machinery bite monitoring device according to claim 7, it is characterised in that: the rotation angle of torque
Measuring unit (2) include torque sensor (21), analog-to-digital conversion module (22), rotary angle transmitter (23), first processor (24),
The output end of wireless sending module (25) and the first power module (26), the torque sensor (21) passes through analog-to-digital conversion mould
Block (22) is connected with the input terminal of first processor (24), the output end and first processor (24) of the rotary angle transmitter (23)
Input terminal be connected, the first processor (24) is connected by wireless sending module (25) with data sink (3), described
The output end of first power module (26) respectively with torque sensor (21), analog-to-digital conversion module (22), rotary angle transmitter (23),
First processor (24), wireless sending module (25) are connected.
9. high voltage isolator machinery bite monitoring device according to claim 7 or 8, it is characterised in that: the data
Reception device (3) includes wireless receiving module (31), second processor (32), Upper machine communication module (33) and second source mould
Block (34) is connected between the wireless receiving module (31) and rotation angle of torque measuring unit (2) by wireless network, and described second
Processor (32) is connected with wireless receiving module (31), Upper machine communication module (33) respectively, the second power supply module (34)
Output end be connected respectively with wireless receiving module (31), second processor (32), Upper machine communication module (33), it is described upper
Machine communication module (33) is connected with computer equipment (1).
10. a kind of high voltage isolator machinery bite monitoring device characterized by comprising
Curve generator unit, for detect tested high voltage isolator during breaking-closing operating the torque of output shaft and
Corner simultaneously generates actual measurement torque and angle data；
Tracing analysis diagnostic program unit will survey the torque and corner of torque and angle data and preset normal condition
Data, which are compared, determines whether tested high voltage isolator occurs mechanical jam faults.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111122137A (en) * | 2019-12-20 | 2020-05-08 | 深圳供电局有限公司 | Digital diagnostic device for mechanical fault of isolating switch |
| CN112763118A (en) * | 2020-12-09 | 2021-05-07 | 国网湖南省电力有限公司检修公司 | Real-time monitoring device and monitoring method for isolating switch operating torque |
| CN114428209A (en) * | 2022-04-06 | 2022-05-03 | 广东电网有限责任公司云浮供电局 | Isolator monitoring devices |
| CN115347678A (en) * | 2022-10-13 | 2022-11-15 | 广东南海电力设计院工程有限公司 | Protection system of outdoor high-voltage isolating switch |
| WO2024099022A1 (en) * | 2022-11-07 | 2024-05-16 | 中广核太阳能德令哈有限公司 | Method and system for testing rotation performance of heat collector |
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| CN106546917A (en) * | 2016-11-24 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of disconnecting switch mechanical fault diagnosis device |
| CN106680700A (en) * | 2016-11-25 | 2017-05-17 | 云南电网有限责任公司电力科学研究院 | Isolation switch intelligence diagnosis system and method thereof |
| CN108414200A (en) * | 2018-02-14 | 2018-08-17 | 武汉大学 | A kind of high voltage isolator mechanical defect diagnostic method |
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| CN111122137A (en) * | 2019-12-20 | 2020-05-08 | 深圳供电局有限公司 | Digital diagnostic device for mechanical fault of isolating switch |
| CN111122137B (en) * | 2019-12-20 | 2022-10-28 | 深圳供电局有限公司 | Digital diagnostic device for mechanical fault of isolating switch |
| CN112763118A (en) * | 2020-12-09 | 2021-05-07 | 国网湖南省电力有限公司检修公司 | Real-time monitoring device and monitoring method for isolating switch operating torque |
| CN114428209A (en) * | 2022-04-06 | 2022-05-03 | 广东电网有限责任公司云浮供电局 | Isolator monitoring devices |
| CN115347678A (en) * | 2022-10-13 | 2022-11-15 | 广东南海电力设计院工程有限公司 | Protection system of outdoor high-voltage isolating switch |
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Application publication date: 20190514 |