CN208636370U - A kind of CVT secondary side remote monitoring device - Google Patents
A kind of CVT secondary side remote monitoring device Download PDFInfo
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- CN208636370U CN208636370U CN201820804701.4U CN201820804701U CN208636370U CN 208636370 U CN208636370 U CN 208636370U CN 201820804701 U CN201820804701 U CN 201820804701U CN 208636370 U CN208636370 U CN 208636370U
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Abstract
The utility model discloses a kind of CVT secondary side remote monitoring devices, including micro-chip processor, low-pass filter circuit, voltage changing module, display module, the first data storage and the second data storage, the input terminal of low-pass filter circuit is electrically connected with the connecting terminal of CVT secondary side；The output end of low-pass filter circuit is electrically connected with the input terminal of voltage changing module；The output end of voltage changing module is electrically connected with the first input end of micro-chip processor；First output end of micro-chip processor is electrically connected with the input terminal of display module；The second output terminal of micro-chip processor is electrically connected with the input terminal of the first data storage；The third output end of micro-chip processor is electrically connected with the input terminal of the second data storage.The utility model is not under the premise of influencing power grid running, the voltage condition of real-time detection and analysis CVT secondary side, and the synchronous information of voltage and analysis of saving is as a result, ensured the safety of CVT equipment.
Description
Technical field
The utility model relates to CVT monitoring fields, more particularly, to a kind of CVT secondary side remote monitoring device.
Background technique
Capacitance type potential transformer (Capacitor Voltage Transformer, CVT) is widely used in electric power
It is voltage supplied measurement, power observing and controlling, automatic control, relay protection and the electric power being used as power line carrier capacitor in system
Equipment, impact strength is small, small in size, light-weight, can reliably damp ferromagnetic resonance, has excellent transient response characteristic.Electricity
Power equipment preventive trial is a kind of test that periodically has a power failure, and is an important ring in power equipment operation and maintenance work
Section.
Currently, CVT prerun mainly passes through measurement capacitor and dielectric loss can diagnose the dielectric insulation performance of CVT, capacitor is hit
Wear, oil starvation situations such as.And it can also reach this purpose actually by monitoring in real time to secondary voltage, or even pass through analysis CVT
The variation tendency of secondary voltage, moreover it is possible to find the problem of traditional prerun can not be found out.Current CVT on-line monitoring system is usually straight
The data for obtaining CVT secondary voltage from EMS Energy Management System backstage are connect, original voltage can be counted in real time at EMS system
It is mean effective value, 15 minutes primary deposit databases according to processing.So the number that can be got from EMS database is also 15 points
Clock is primary.The data of this frequency be for the steady-state analysis of CVT it is enough, also meet the basic need of test, but if
Transient state or transient affair has occurred in CVT, can not be captured by on-line monitoring system.
Utility model content
The utility model overcomes the defect of existing CVT detection, provides the new CVT secondary side of one kind and remotely monitors dress
It sets.The utility model effectively detects the voltage condition of CVT secondary side, has ensured that CVT is set under the premise of not influencing power grid running
Standby safety.
In order to solve the above technical problems, the technical solution of the utility model is as follows:
A kind of CVT secondary side remote monitoring device, which is characterized in that including micro-chip processor, low-pass filter circuit, transformation
Module, display module, the first data storage and the second data storage, wherein
The input terminal of the low-pass filter circuit is electrically connected with the connecting terminal of CVT secondary side；
The output end of the low-pass filter circuit is electrically connected with the input terminal of voltage changing module；
The output end of the voltage changing module is electrically connected with the first input end of micro-chip processor；
First output end of the micro-chip processor is electrically connected with the input terminal of display module；
The second output terminal of the micro-chip processor is electrically connected with the input terminal of the first data storage；
The third output end of the micro-chip processor is electrically connected with the input terminal of the second data storage.
Utility model works process is as follows:
First from the secondary side collection voltages signal of CVT, after being filtered by low-pass filter circuit, pass through voltage changing module
Voltage signal (0 ~ 57V) is depressured to 0V ~ 3V or so, then carries out analog-to-digital conversion and data analysis by micro-chip processor, and
Analysis result and signal waveform are shown by display module.Meanwhile for the abnormal data in acquisition data, deposit every time
Storage is in the first data storage；For the normal data in acquisition data, interruption is stored in the second data storage.
In a preferred solution, the low-pass filter circuit include first resistor, second resistance, 3rd resistor,
First capacitor, the second capacitor, operational amplifier, wherein
Input terminal of the one end of the first resistor as low-pass filter circuit, the other end of first resistor and the second electricity
One end of resistance is electrically connected；
The other end of the first resistor is electrically connected with one end of first capacitor；
The other end of the first capacitor is electrically connected with the output end of operational amplifier；
The other end of the second resistance is electrically connected with the non-inverting input terminal of operational amplifier；
The other end of the second resistance is electrically connected with one end of the second capacitor；
The other end of second capacitor is grounded；
The output end of the operational amplifier is electrically connected with the output end inverting input terminal of operational amplifier；
The output end of the operational amplifier is electrically connected with one end of 3rd resistor, and the other end of 3rd resistor is as low
The output end of bandpass filter circuit.
In a preferred solution, the CVT secondary side remote monitoring device further includes shell, the micro process
Chip, low-pass filter circuit, voltage changing module, the first data storage and the second data storage are all disposed within the inside of shell,
The outside of shell is arranged in the input port of low-pass filter circuit；The display module is arranged in the outside of shell.
In a preferred solution, the shell includes pedestal, and the pedestal is provided with bolt hole, and CVT bis- times
By bolt, nuts and bolt hole is fixed in CVT equipment side remote monitoring device.
In a preferred solution, the CVT secondary side remote monitoring device further includes wireless communication module, described
Wireless communication module be electrically connected with micro-chip processor.
In a preferred solution, the wireless communication module includes 4G communication module, the 4G communication module
Input terminal and micro-chip processor the 4th output end.
In this preferred embodiment, 4G communication module can be sent monitoring data in staff's hand in a distant place.
In a preferred solution, the wireless communication module includes WIFI module, the WIFI module it is defeated
Enter the 5th output end of end and micro-chip processor；Several CVT secondary side remote real time monitoring devices are made up of WIFI module
Local area network.
In this preferred embodiment, local area network, the monitoring number of CVT secondary side remote real time monitoring device are formed by WIFI module
According to can circulate in local area network.
In a preferred solution, the CVT secondary side remote monitoring device further includes backup power source, and described is standby
With power supply in the event of a power failure, micro-chip processor to send power cut-off information by 4G communication module.
In a preferred solution, the CVT secondary side remote monitoring device further includes power supply circuit, the confession
Circuit is directly connected to commercial power socket and power supply circuit also charges to backup power source.
In this preferred embodiment, power supply circuit ensure that CVT secondary side remote monitoring device both can directly use mains-supplied,
It can also be powered with backup power source.
In a preferred solution, the CVT secondary side remote monitoring device further includes protective tube, wherein
One end of the protective tube is electrically connected with the input terminal of low-pass filter circuit；
The other end of the protective tube is electrically connected with the input terminal of voltage changing module.
In this preferred embodiment, protective tube ensures that CVT secondary side will not directly burn damage equipment.
In a preferred solution, the protective tube is 0.1A protective tube.
Compared with prior art, the beneficial effect of technical solutions of the utility model is:
The utility model is not under the premise of influencing power grid running, the voltage condition of real-time detection and analysis CVT secondary side,
The synchronous information of voltage and analysis of saving is as a result, ensured the safety of CVT equipment.
Detailed description of the invention
Fig. 1 is the module installation diagram of embodiment.
Fig. 2 is the low-pass filter circuit figure in embodiment.
Label declaration: 1. input terminals；2. output end；3. operational amplifier；.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The technical solution of the utility model is described further with reference to the accompanying drawings and examples.
As shown in Figure 1, a kind of CVT secondary side remote monitoring device, including low-pass filter circuit, protective tube, voltage transmission
Device, enhanced STM32 chip, WIFI module, camera, 4G communication module, the first TF card, the second TF card, shell and LCD are shown
Screen, wherein
The input terminal of low-pass filter circuit is electrically connected with the connecting terminal of CVT secondary side；
The output end of low-pass filter circuit is electrically connected with one end of protective tube；
The other end of protective tube is electrically connected with the input terminal of voltage transmitter；
The output end of voltage transmitter is electrically connected with the first input end of enhanced STM32 chip；
The output end of camera is electrically connected with the second input terminal of enhanced STM32 chip；
First output end of enhanced STM32 chip is electrically connected with the input terminal of WIFI module；
The second output terminal of enhanced STM32 chip is electrically connected with the input terminal of 4G communication module；
The third output end of enhanced STM32 chip is electrically connected with the input terminal of the first TF card；
4th output end of enhanced STM32 chip is electrically connected with the input terminal of LCD display；
5th output end of enhanced STM32 chip is electrically connected with the input terminal of the second TF card.
Wherein, as shown in Fig. 2, low-pass filter circuit includes first resistor, second resistance, 3rd resistor, first capacitor,
Two capacitors, operational amplifier, wherein
Input terminal 1 of the one end of first resistor as low-pass filter circuit, the other end of first resistor and second resistance
One end electrical connection；
The other end of first resistor is electrically connected with one end of first capacitor；
The other end of first capacitor is electrically connected with the output end of operational amplifier 3；
The other end of second resistance is electrically connected with the non-inverting input terminal of operational amplifier 3；
The other end of second resistance is electrically connected with one end of the second capacitor；
The other end of second capacitor is grounded；
The output end of operational amplifier 3 is electrically connected with the output end inverting input terminal of operational amplifier 3；
The output end of operational amplifier 3 is electrically connected with one end of 3rd resistor, and the other end of 3rd resistor is as low pass filtered
The output end 2 of wave circuit.
Wherein, low-pass filter circuit, protective tube, voltage transmitter, enhanced STM32 chip, WIFI module, 4G communicate mould
Block, the first TF card, the second TF card are all disposed within the inside of shell, and the outer of shell is arranged in the input port of low-pass filter circuit
Side；Camera and LCD display are arranged in the outside of shell.Shell includes pedestal, and pedestal is provided with bolt hole, and embodiment is logical
Bolt is crossed, nuts and bolt hole is fixed in CVT equipment.
The present embodiment course of work:
Voltage signal (0 ~ 57V) is collected from the secondary side of CVT first, low-pass filter circuit is first passed around and is filtered,
Then decompression processing is being carried out by voltage transmitter, is finally carrying out analog-to-digital conversion and data point by enhanced STM32 chip
Analysis, and data and analysis result are stored by TF card.Meanwhile the analysis result of enhanced STM32 chip being led to by 4G
Letter module is sent in staff's hand, and LCD display is for showing analysis result.WIFI module is used for the office formed in CVT
Carry out data transmission in the net of domain.Camera acquires the waveform image of LCD display and the image data of CVT secondary side, passes through 4G
Communication module is sent in staff's hand in a distant place.If the electric current of CVT secondary side is more than the limitation of protective tube, protective tube is certainly
Dynamic circuit breaker is opened, and equipment is protected.For the abnormal data in acquisition data, it is stored in the first TF card every time；For in acquisition data
Normal data, interruption are stored in the second TF card.
The same or similar label correspond to the same or similar components；
The terms describing the positional relationship in the drawings are only for illustration, should not be understood as the limitation to this patent；
Obviously, the above embodiments of the present invention is merely examples for clearly illustrating the present invention, and
It is not limitations of the embodiments of the present invention.For those of ordinary skill in the art, in above description
On the basis of can also make other variations or changes in different ways.There is no need and unable to give all embodiments
Exhaustion.Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention etc., should be included in
Within the protection scope of the utility model claims.
Claims (7)
1. a kind of CVT secondary side remote monitoring device, which is characterized in that including micro-chip processor, low-pass filter circuit, transformation mould
Block, display module, the first data storage and the second data storage, wherein
The input terminal of the low-pass filter circuit is electrically connected with the connecting terminal of CVT secondary side；
The output end of the low-pass filter circuit is electrically connected with the input terminal of voltage changing module；
The output end of the voltage changing module is electrically connected with the first input end of micro-chip processor；
First output end of the micro-chip processor is electrically connected with the input terminal of display module；
The second output terminal of the micro-chip processor is electrically connected with the input terminal of the first data storage；
The third output end of the micro-chip processor is electrically connected with the input terminal of the second data storage；
The low-pass filter circuit includes that first resistor, second resistance, 3rd resistor, first capacitor, the second capacitor, operation are put
Big device, wherein
Input terminal of the one end of the first resistor as low-pass filter circuit, the other end of first resistor and second resistance
One end electrical connection；
The other end of the first resistor is electrically connected with one end of first capacitor；
The other end of the first capacitor is electrically connected with the output end of operational amplifier；
The other end of the second resistance is electrically connected with the non-inverting input terminal of operational amplifier；
The other end of the second resistance is electrically connected with one end of the second capacitor；
The other end of second capacitor is grounded；
The output end of the operational amplifier is electrically connected with the output end inverting input terminal of operational amplifier；
The output end of the operational amplifier is electrically connected with one end of 3rd resistor, and the other end of 3rd resistor is as low pass filtered
The output end of wave circuit；
The CVT secondary side remote monitoring device further includes backup power source and power supply circuit, and the power supply circuit directly connects
It connects commercial power socket and power supply circuit also charges to backup power source.
2. CVT secondary side remote monitoring device according to claim 1, which is characterized in that the CVT secondary side is long-range
Monitoring device further includes shell, the micro-chip processor, low-pass filter circuit, voltage changing module, the first data storage and
Two data storages are all disposed within the inside of shell, and the outside of shell is arranged in the input port of low-pass filter circuit；Described
Display module is arranged in the outside of shell.
3. CVT secondary side remote monitoring device according to claim 2, which is characterized in that the shell includes pedestal,
The pedestal is provided with bolt hole, and by bolt, nuts and bolt hole is fixed at CVT secondary side remote monitoring device
In CVT equipment.
4. according to claim 1 to CVT secondary side remote monitoring device described in any claim in 3, which is characterized in that institute
The CVT secondary side remote monitoring device stated further includes wireless communication module, the wireless communication module and micro-chip processor electricity
Connection.
5. CVT secondary side remote monitoring device according to claim 4, which is characterized in that the wireless communication module
Including 4G communication module, the input terminal of the 4G communication module and the 4th output end of micro-chip processor.
6. CVT secondary side remote monitoring device according to claim 5, which is characterized in that the wireless communication module
Including WIFI module, the input terminal of the WIFI module and the 5th output end of micro-chip processor；Several CVT secondary sides are remote
Journey real-time monitoring device forms local area network by WIFI module.
7. according to claim 1, CVT secondary side remote monitoring device described in 2,3 or 5, which is characterized in that the CVT bis-
Secondary side remote monitoring device further includes protective tube, wherein
One end of the protective tube is electrically connected with the input terminal of low-pass filter circuit；
The other end of the protective tube is electrically connected with the input terminal of voltage changing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804701.4U CN208636370U (en) | 2018-05-28 | 2018-05-28 | A kind of CVT secondary side remote monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820804701.4U CN208636370U (en) | 2018-05-28 | 2018-05-28 | A kind of CVT secondary side remote monitoring device |
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| Publication Number | Publication Date |
|---|---|
| CN208636370U true CN208636370U (en) | 2019-03-22 |
Family
ID=65732419
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820804701.4U Active CN208636370U (en) | 2018-05-28 | 2018-05-28 | A kind of CVT secondary side remote monitoring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542784A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT secondary side remote monitoring device |
| CN110554931A (en) * | 2019-07-29 | 2019-12-10 | 南京兆伏电力科技有限公司 | Relay protection device and data backup and recovery method thereof |
-
2018
- 2018-05-28 CN CN201820804701.4U patent/CN208636370U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110542784A (en) * | 2018-05-28 | 2019-12-06 | 广东电网有限责任公司 | CVT secondary side remote monitoring device |
| CN110554931A (en) * | 2019-07-29 | 2019-12-10 | 南京兆伏电力科技有限公司 | Relay protection device and data backup and recovery method thereof |
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