CN208092201U - A kind of change of current change load ratio bridging switch switching waveform measuring device - Google Patents
A kind of change of current change load ratio bridging switch switching waveform measuring device Download PDFInfo
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- CN208092201U CN208092201U CN201820344196.XU CN201820344196U CN208092201U CN 208092201 U CN208092201 U CN 208092201U CN 201820344196 U CN201820344196 U CN 201820344196U CN 208092201 U CN208092201 U CN 208092201U
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- load ratio
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- bridging switch
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Abstract
The utility model discloses a kind of changes of current to become load ratio bridging switch switching waveform measuring device, including 50Hz/220V single phase alternating current power supplies, internal electric source module, control switch, load ratio bridging switch test interface, voltage-current sensor, collection plate, primary processor and display；50Hz/220V single phase alternating current power supplies are connect by internal electric source module, control switch and load ratio bridging switch test interface with subject load ratio bridging switch, voltage-current sensor input terminal is connect with subject load ratio bridging switch, output end is connect by collection plate with primary processor, primary processor output end is connected with display, internal electric source module is for exporting DC constant current power supply and alternating-current voltage source, and control switch is for selecting DC constant current power supply or alternating-current voltage source.The measuring device of the utility model can realize that direct current method and alternating current method measure load ratio bridging switch switching waveform simultaneously, and wave analysis is unique, easy analysis, greatly improves the accuracy rate of tap switch state-detection and fault diagnosis.
Description
Technical field
The utility model is related to a kind of changes of current to become load ratio bridging switch switching waveform measuring device.
Background technology
Load ratio bridging switch is the core element that the change of current becomes pressure regulation, is switched fast in actual operation, to tap switch machine
Tool characteristic requirements are very high, due to increasing for times of pressure regulation, once some component therein breaks down, it is likely that and cause the change of current to become
Major accident occurs with DC transmission system.Relevant inspection and experiment are carried out to it when the change of current becomes handing-over and overhaul, with
Confirm the quality of load ratio bridging switch installation or maintenance, it is ensured that load ratio bridging switch being capable of long-term safety operation.Traditional suspended core
It checks tap switch, needs a large amount of human and material resources, and quite time-consuming, detection is extremely inconvenient.Later people become according to the change of current
The information such as voltage, electric current when operation, are monitored data volume, with find loaded switch and the change of current become with the presence or absence of defect and
Failure.
Load ratio bridging switch is the device that can change tap under change of current variable speed load condition.To ensure in actual operation
Electric current it is continuous, two tap in must concatenate a transition resistance, with limit circulating current, avoid tap between short circuit.It changes
The handoff procedure of rheology load ratio bridging switch, along with transition resistance access and pick out.Load ratio bridging switch switching tests are
One important pilot project can be seen that can switching switch correctly act, to sentence by the test measurement switching waveform
Disconnected load ratio bridging switch is with the presence or absence of failures such as motor drive mechanism remarkable action, insulating cylinder deformation, contact burning, drive shafts fractures.
Utility model content
The purpose of this utility model is to provide a kind of change of current change load ratio bridging switch switching waveform measuring device, by having
The analysis of transition resistance DC waveform and AC wave shape when on-load shunting switch switches, realizes converter power transformer load ratio bridging switch shape
State detects and fault diagnosis.
To achieve the above object, technical solution used by the utility model is：
A kind of change of current change load ratio bridging switch switching waveform measuring device, including 50Hz/220V single phase alternating current power supplies, inside
Power module, control switch, load ratio bridging switch test interface, voltage-current sensor, collection plate, primary processor and display
Device；50Hz/220V single phase alternating current power supplies pass through internal electric source module, control switch and load ratio bridging switch test interface and subject
Load ratio bridging switch connects, and voltage-current sensor input terminal is connect with subject load ratio bridging switch, and output end passes through collection plate
It is connect with primary processor, primary processor output end is connected with display, and internal electric source module is for exporting DC constant current power supply and friendship
Galvanic electricity potential source, control switch is for selecting DC constant current power supply or alternating-current voltage source.
Further include the printer being connect with the primary processor output end and storage as a kind of improvement of the utility model
Device is used for the printing and storage of measured waveform.
As a kind of improvement of the utility model, the DC constant current power supply is 5A DC currents, ripple coefficient 3% with
It is interior.
As a kind of improvement of the utility model, the alternating-current voltage source is the 400V alternating voltages of 45Hz or 55Hz.It adopts
It is to reduce the interference of power frequency electromagnetic field in current conversion station with the alien frequencies voltage source of power frequency 50Hz is different from, realization is to power frequency electromagnet
The shielding of field, improves the accuracy of measurement.
As a kind of improvement of the utility model, the sample frequency of the collection plate is 100kHz, improves sampling precision, subtracts
The distortion of few waveform.
When the utility model is used, 50Hz/220V single phase alternating current power supplies are input to internal electric source module, internal electric source module
DC constant current power supply and alternating-current voltage source are exported, switch selection output DC constant current power supply or alternating-current voltage source are controlled, is divided by having to carry
It connects switch testing interface to export to subject load ratio bridging switch, voltage-current sensor measures the electricity of load ratio bridging switch respectively
Pressure, current signal are simultaneously exported to collection plate, and collection plate collection voltages, current signal are exported to primary processor, and primary processor calculates
Load ratio bridging switch switching waveform is obtained, switching waveform is shown by display, switching waveform is printed by printer and is passed through
Reservoir stores switching waveform.
When measuring transition resistance DC waveform, control switch control internal electric source module output DC constant current power supply is extremely tested
Load ratio bridging switch, voltage-current sensor measure the DC voltage of load ratio bridging switch, DC current signal and export respectively
To collection plate, collection plate acquisition DC voltage, DC current signal are exported to primary processor, and load point has been calculated in primary processor
Connect the transition resistance DC waveform of switching process.
When measuring transition resistance AC wave shape, control switch control internal electric source module output AC voltage source to subject
Load ratio bridging switch, voltage-current sensor measure the alternating voltage of load ratio bridging switch, ac current signal and export respectively
To collection plate, collection plate acquisition alternating voltage, ac current signal are exported to primary processor, and load point has been calculated in primary processor
Connect the transition resistance AC wave shape of switching process.
Compared with prior art, advantage is the utility model：
1, it can realize that direct current method and alternating current method measure load ratio bridging switch switching waveform simultaneously, wave analysis is unique, analyzes
It is convenient, greatly improve the accuracy rate of tap switch state-detection and fault diagnosis.
2, the 400V alternating voltages of AC wave shape measurement module output 45Hz or 55Hz are used to load ratio bridging switch is tested
The alien frequencies voltage source for being different from power frequency 50Hz is realized to power frequency electromagnetic field to reduce the interference of power frequency electromagnetic field in current conversion station
Shielding, improve the accuracy of measurement.
3, the sample frequency of sampling plate is 100kHz, improves sampling precision, reduces the distortion of waveform.
4, reservoir can store switching waveform, and primary processor can will survey switching waveform and transfer the history wave in memory
Shape carries out longitudinal comparison, and the switching waveform of tap switch carries out lateral comparison between the different phase changes of current are become, and obtains waveform phase relation
Number realizes converter power transformer load ratio bridging switch state-detection and fault diagnosis.
Description of the drawings
Fig. 1 is the structural schematic diagram that the utility model change of current becomes load ratio bridging switch switching waveform measuring device.
Reference sign：1-50Hz/220V single phase alternating current power supplies, 2- internal electric source modules, 3- control switches, 4- have load
Tap switch test interface, 5- subject tap switches, 6- voltage-current sensors, 7- collection plates, 8- primary processors, 9- are shown
Device, 10- printers, 11- memories.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and examples.It is understood that described herein
Specific embodiment be used only for explaining the utility model, rather than the restriction to the utility model.It also should be noted that
For ease of description, it is illustrated only in attached drawing and the relevant part of the utility model rather than full content.
It please referring to shown in Fig. 1, the change of current of the utility model becomes load ratio bridging switch switching waveform measuring device, including
50Hz/220V single phase alternating current power supplies 1, internal electric source module 2, control switch 3, load ratio bridging switch test interface 4, voltage and current
Sensor 6, collection plate 7, primary processor 8, display 9, printer 10 and memory 11.50Hz/220V single phase alternating current power supplies 1 are defeated
Enter to internal electric source module 2, internal electric source module 2 exports DC constant current power supply and alternating-current voltage source, and the control selection output of switch 3 is straight
Constant-current source or alternating-current voltage source are flowed, the output of load ratio bridging switch test interface 4 to subject load ratio bridging switch 5, voltage electricity are passed through
Flow sensor 6 measures the voltage of load ratio bridging switch, current signal and exports to collection plate 7 respectively, 7 collection voltages of collection plate,
Current signal is exported to primary processor 8, and load ratio bridging switch switching waveform is calculated in primary processor 8, can be aobvious by display 9
Show switching waveform, switching waveform is printed by printer 10 and switching waveform is stored by reservoir 11.Wherein, DC constant current power supply
For 5A DC currents, ripple coefficient is within 3%；Alternating-current voltage source is the 400V alternating voltages of 45Hz or 55Hz, using difference
It is to realize the screen to power frequency electromagnetic field to reduce the interference of power frequency electromagnetic field in current conversion station in the alien frequencies voltage source of power frequency 50Hz
It covers, improves the accuracy of measurement；The sample frequency of collection plate is 100kHz, improves sampling precision, reduces the distortion of waveform.Pass through
Internal electric source module 2 exports DC constant current power supply and alternating-current voltage source, and load ratio bridging switch switching waveform is calculated by primary processor 8
The prior art is belonged to, details are not described herein.
The measuring device of the utility model can realize that direct current method and alternating current method measure load ratio bridging switch switching wave simultaneously
Shape.Specifically：
When measuring transition resistance DC waveform, builtin voltage module 2 exports DC constant current power supply to subject loaded tap-off and opens
5 are closed, voltage-current sensor 6 measures the DC voltage of load ratio bridging switch 5, DC current signal and output to collection plate respectively
7, collection plate 7 acquires DC voltage, DC current signal is exported to primary processor 8, and primary processor 8 is calculated loaded tap-off and opens
Close the transition resistance DC waveform of handoff procedure.
When measuring transition resistance AC wave shape, 2 output AC voltage source of builtin voltage module to subject loaded tap-off is opened
5 are closed, voltage-current sensor 6 measures the alternating voltage of load ratio bridging switch 5, ac current signal and output to collection plate respectively
7, collection plate 7 acquires alternating voltage, ac current signal is exported to primary processor 8, and load ratio bridging switch is calculated in main process task 8
The AC wave shape of handoff procedure.
Above-listed detailed description is illustrating for the utility model possible embodiments, which is not to limit
The scope of the claims of the utility model, all equivalence enforcements or change without departing from carried out by the utility model are intended to be limited solely by this case
In the scope of the claims.
Claims (5)
1. a kind of change of current becomes load ratio bridging switch switching waveform measuring device, it is characterised in that：Including 50Hz/220V single phase acs
Power supply, internal electric source module, control switch, load ratio bridging switch test interface, voltage-current sensor, collection plate, main process task
Device and display；50Hz/220V single phase alternating current power supplies are connect by internal electric source module, control switch and load ratio bridging switch test
Mouth is connect with subject load ratio bridging switch, and voltage-current sensor input terminal is connect with subject load ratio bridging switch, and output end is logical
It crosses collection plate to connect with primary processor, primary processor output end is connected with display, and internal electric source module is for exporting direct current perseverance
Stream source and alternating-current voltage source, control switch is for selecting DC constant current power supply or alternating-current voltage source.
2. the change of current according to claim 1 becomes load ratio bridging switch switching waveform measuring device, it is characterised in that：Further include
The printer and memory being connect with the primary processor output end.
3. the change of current according to claim 2 becomes load ratio bridging switch switching waveform measuring device, it is characterised in that：It is described straight
Stream constant-current source is 5A DC currents, and ripple coefficient is within 3%.
4. the change of current according to claim 2 becomes load ratio bridging switch switching waveform measuring device, it is characterised in that：The friendship
Galvanic electricity potential source is the 400V alternating voltages of 45Hz or 55Hz.
5. the change of current according to claim 2 becomes load ratio bridging switch switching waveform measuring device, it is characterised in that：It is described to adopt
Integrate the sample frequency of plate as 100kHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820344196.XU CN208092201U (en) | 2018-03-13 | 2018-03-13 | A kind of change of current change load ratio bridging switch switching waveform measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820344196.XU CN208092201U (en) | 2018-03-13 | 2018-03-13 | A kind of change of current change load ratio bridging switch switching waveform measuring device |
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| CN208092201U true CN208092201U (en) | 2018-11-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763992A (en) * | 2019-11-28 | 2020-02-07 | 国网河北省电力有限公司电力科学研究院 | AC/DC comprehensive test method for on-load tap-changer of large transformer |
| CN112014727A (en) * | 2020-07-15 | 2020-12-01 | 南方电网科学研究院有限责任公司 | Testing device for harmonic current switching capacity of tap switch |
| CN113985270A (en) * | 2021-11-02 | 2022-01-28 | 广东电网有限责任公司 | Method, system and medium for detecting switching time sequence of on-load tap-changer |
| CN114089183A (en) * | 2021-11-29 | 2022-02-25 | 国网冀北电力有限公司承德供电公司 | Fault detection method and fault detection device |
-
2018
- 2018-03-13 CN CN201820344196.XU patent/CN208092201U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763992A (en) * | 2019-11-28 | 2020-02-07 | 国网河北省电力有限公司电力科学研究院 | AC/DC comprehensive test method for on-load tap-changer of large transformer |
| CN112014727A (en) * | 2020-07-15 | 2020-12-01 | 南方电网科学研究院有限责任公司 | Testing device for harmonic current switching capacity of tap switch |
| CN112014727B (en) * | 2020-07-15 | 2022-09-16 | 南方电网科学研究院有限责任公司 | Testing device for harmonic current switching capacity of tap switch |
| CN113985270A (en) * | 2021-11-02 | 2022-01-28 | 广东电网有限责任公司 | Method, system and medium for detecting switching time sequence of on-load tap-changer |
| CN113985270B (en) * | 2021-11-02 | 2022-05-27 | 广东电网有限责任公司 | Method, system and medium for detecting switching time sequence of on-load tap-changer |
| CN114089183A (en) * | 2021-11-29 | 2022-02-25 | 国网冀北电力有限公司承德供电公司 | Fault detection method and fault detection device |
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