CN205506923U - Transformer neutral point direct current measuring device - Google Patents
Transformer neutral point direct current measuring device Download PDFInfo
- Publication number
- CN205506923U CN205506923U CN201620211145.0U CN201620211145U CN205506923U CN 205506923 U CN205506923 U CN 205506923U CN 201620211145 U CN201620211145 U CN 201620211145U CN 205506923 U CN205506923 U CN 205506923U
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- module
- neutral point
- transformer neutral
- hall element
- current measurement
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- 230000007935 neutral effect Effects 0.000 title claims abstract description 28
- 238000002955 isolation Methods 0.000 claims abstract description 24
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000001914 filtration Methods 0.000 claims abstract description 5
- 238000005259 measurement Methods 0.000 claims description 27
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 15
- 239000010949 copper Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 11
- 239000000835 fiber Substances 0.000 claims description 7
- 230000001012 protector Effects 0.000 claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000005611 electricity Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 239000013307 optical fiber Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 230000033772 system development Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a transformer neutral point direct current measuring device, it owes voltage protection module for power module's mistake to include to transmit the alternating voltage of outside working power supply input, it is connected to owe voltage protection module with the mistake, convert alternating voltage the power module of DC voltage for the hall sensor power supply into, be connected with power module, the hall sensor who keeps apart the change and send the module is given in output after carrying out filtering amplification and hall excitation processing to the signal, and be connected with hall sensor, become to send to the signal of hall sensor output and handle back output and observe and control isolation that collection system carries out direct current measuring real -time supervision and data record for the backstage and become and send the module, hall sensor's one end was connected through power module and was owed voltage protection module, and the other end is connected to keep apart to become and is sent the module. The utility model discloses an overvoltage transmission route is blocked to the electric isolation of high pressure place equipment and low pressure place equipment, has improved the stability and the security of detection device operation.
Description
Technical field
This utility model relates to high voltage dc transmission technology, particularly relates to one and has over-voltage protection function
Transformer neutral point DC current measurement apparatus.
Background technology
In the epoch of HVDC transmission system development, when HVDC transmission system is in bipolar injustice
When weighing apparatus operation or the one pole the earth method of operation, in ground, DC current can be invaded by transformer neutral point earth lead
Enter AC system, AC system transformator is caused a series of impacts such as D.C. magnetic biasing harm.For understanding direct current
Magnetic bias, in the distribution situation of electrical network, needs to be monitored neutral point of main transformer DC current.Currently for change
The measurement of pressure neutral point direct current mainly uses Hall element.
During realizing, inventor finds that in conventional art, at least there are the following problems: direct current monitoring sensing
Device need to take outside working power (Hall element job demand external power source), the letter detected in high pressure place
Number needs are sent to backstage measure and control device by signal cable.But, the overvoltage in transformer station's high pressure place
Situation, can form path, to Hall element inside by the signal cable of Hall element or feed cable
The devices such as the Hall element that voltage endurance capability is more weak cause damage.
Utility model content
Based on this, it is necessary to for the over-voltage condition in transformer station's high pressure place in conventional art, Hall is passed
The hurtful problems of device such as the Hall element that the internal voltage endurance capability of sensor is more weak, it is provided that in a kind of transformator
Property point direct current measuring devices.
To achieve these goals, the embodiment of technical solutions of the utility model is:
Provide a kind of transformer neutral point DC current measurement apparatus, including by outside working power input
AC voltages transmission to power module cross low-voltage protection module, with cross low-voltage protection module be connected,
Alternating voltage is converted to the power module that DC voltage is powered to Hall element, be connected with power module,
Signal is amplified filtering and Hall energized process after output give isolation transmitting module Hall element, with
And be connected with Hall element, to Hall element output signal carry out pick-up process after export to backstage
Observing and controlling harvester carries out the monitoring in real time of DC current measurement and the isolation transmitting module of data record；
One end of Hall element connected low-voltage protection module by power module, and the other end connects isolation
Transmitting module.
Technique scheme has the advantages that
This utility model transformer neutral point DC current measurement apparatus, uses Hall element sheathed or engagement
In the mode of copper bar, implement once with secondary insulating, intercept high-pressure side overvoltage passage；By crossing under-voltage
Protection module and isolation transmitting module transmit signal, intercept low-pressure side overvoltage passage.This utility model has
There is over-voltage protection function, it is achieved that high pressure Premises Equipment and the electrical isolation of low pressure Premises Equipment, blocked
Voltage transmission path, improves stability and the safety of detection plant running.
Accompanying drawing explanation
By being more particularly described of the preferred embodiment of the present utility model shown in accompanying drawing, of the present utility model
Above and other purpose, feature and advantage will become more fully apparent.Reference identical in whole accompanying drawings
Indicate identical part, and the most deliberately draw accompanying drawing by actual size equal proportion scaling, it is preferred that emphasis is illustrate
Purport of the present utility model.
Fig. 1 is the structural representation of this utility model transformer neutral point DC current measurement apparatus embodiment 1；
Fig. 2 is that in this utility model transformer neutral point DC current measurement apparatus embodiment 1, signal transmitted
Journey schematic diagram.
Detailed description of the invention
For the ease of understanding this utility model, below with reference to relevant drawings, this utility model is carried out more comprehensively
Description.Accompanying drawing gives first-selected embodiment of the present utility model.But, this utility model can be to be permitted
The most different forms realizes, however it is not limited to embodiment described herein.On the contrary, provide these to implement
The purpose of example is to make to disclosure of the present utility model more thoroughly comprehensively.
It should be noted that when an element is considered as " connection " another element, and it can be to be directly connected to
To another element and in combination be integrated, or may be simultaneously present centering elements.Used herein
Term " engages ", " sheathed ", " one end ", " other end " and similar statement for illustrative purposes only.
Unless otherwise defined, all of technology used herein and scientific terminology with belong to of the present utility model
The implication that those skilled in the art are generally understood that is identical.Institute in description of the present utility model herein
The term used is intended merely to describe the purpose of specific embodiment, it is not intended that in limiting this utility model.
Term as used herein " and/or " include the arbitrary and all of of one or more relevant Listed Items
Combination.
This utility model transformer neutral point DC current measurement apparatus embodiment 1:
Over-voltage condition in order to solve in conventional art in transformer station's high pressure place is resistance to Hall element inside
The hurtful problems of device such as the Hall element that pressure energy power is more weak, this utility model provides a kind of transformator
Neutral point direct current measurement apparatus embodiment 1, Fig. 1 is that this utility model transformer neutral point DC current is surveyed
The structural representation of amount device embodiment 1；As shown in Figure 1:
Transformer neutral point DC current measurement apparatus embodiment 1 can include outside working power input
AC voltages transmission is to the low-voltage protection module 130 excessively of power module 120, with low-voltage protection module excessively
130 it is connected, alternating voltage is converted to the power module 120 that DC voltage is powered to Hall element 110,
It is connected with power module 120, is amplified signal filtering and exporting after Hall energized process becoming to isolation
Send the Hall element 110 of module 140, and be connected with Hall element 110, to Hall element 110
The signal of output exports after carrying out pick-up process and carries out the real-time of DC current measurement to backstage observing and controlling harvester
Monitoring and the isolation transmitting module 140 of data record；
One end of Hall element 110 connected low-voltage protection module 130 by power module 120, another
End connects isolation transmitting module 140.
In a specific embodiment, this utility model transformer neutral point DC current measurement apparatus is implemented
Example 1 can also include tainless terminal case 150 and copper bar 160；Copper bar 160 runs through tainless terminal case 150
Casing both sides；Hall element 110 is sheathed or is engaged on the copper bar 160 in tainless terminal case 150.
In a specific embodiment, copper bar 160 is insulative water-proof with the interface of tainless terminal case 150
Interface.
In a specific embodiment, isolation transmitting module 140 is Fiber isolation transmitter；Wherein, logical
Cross Fiber isolation transmitter and can intercept overvoltage by optical fiber circuit, i.e. utilize optical fiber circuit to block overvoltage
Transmission path, thus realize the electrical isolation of low pressure Premises Equipment.
In a specific embodiment, crossing low-voltage protection module 130 is self-reset over/under-voltage protector；
Wherein, self-reset over/under-voltage protector has the effect of overvoltage protection, thus realizes low pressure Premises Equipment
Electrical isolation.
In a specific embodiment, Hall element 110 is Hall current sensor, use sheathed or
It is engaged on copper bar mode, once with secondary insulating, thus realizes the electrical isolation of high pressure Premises Equipment.
In a specific embodiment, Hall current sensor is direct measuring type Hall element；Wherein, relatively
Measurement DC current another way: diverter, directly survey type (direct measuring type) Hall current sensor has
Volume is little, low in energy consumption, isolable advantage.Additionally the transformator neutral conductor does not allow directly to seal in measurement equipment
Also the probability using diverter is eliminated.
In a specific embodiment, the analogue signal that signal is 4～20mA of Hall element output；
Wherein, analogue signal 4-20mA.DC (1-5V.DC) signal system is International Electrotechnical Commission (IEC): process control
System analogue signal standard.
In order to further illustrate the technical solution of the utility model, spy illustrates that as a example by reality is applied this practicality is new
The structure of type: transformer neutral point DC current measurement apparatus can include Hall current sensor, power supply mould
Block, self-reset over/under-voltage protector, Fiber isolation transmitter, tainless terminal case and copper bar.Wherein
Copper bar runs through the casing both sides of tainless terminal case, Hall current sensor is clipped in the copper in tainless terminal case
On row, copper bar and tainless terminal case interface are insulative water-proof interface.Wherein, close metal cabinet can rise
To intercepting electromagnetic induction effect, effectively reducing magnetic field, high pressure place affects Hall current sensor.This practicality
The bad border at novel actually used scene badly needs antirust waterproof, it is possible to select tainless terminal case.
Fig. 2 is that in this utility model transformer neutral point DC current measurement apparatus embodiment 1, signal transmitted
Journey schematic diagram.As shown in Figure 2:
220Vac (alternating voltage) deliver to after self-reset over/under-voltage protector power module be converted to ±
12Vdc (DC voltage) so that power module can be as the working power of Hall current sensor；Hall
Current sensor can be internal straight survey type (direct measuring type) Hall element not setting balance winding；
The output signal of Hall current sensor processes through amplifying zeroing, low frequency filtering and Hall excitation etc.
After can be converted to 4～20mA analogue signal；Hall current sensor by this analog signal output to optical fiber
Isolating transmitter.Fiber isolation transmitter by being acquired signal processing, A/D conversion to this analogue signal
It is sent to fiber optic receiver through fiber optic transmitter after process, then after being changed by D/A, processes output through pick-up
To backstage observing and controlling harvester, and it is uploaded to monitoring center's server, it is achieved monitoring in real time and data record merit
Energy.
This utility model transformer neutral point DC current measurement apparatus has over-voltage protection function, by adopting
Sheathed with Hall element or be engaged on copper bar mode, and Self-recover overvoltage-undervoltage protector and Fiber isolation become
Send device to transmit signal, it is achieved that high pressure Premises Equipment and the electrical isolation of low pressure Premises Equipment, block overvoltage
Transmission path, improves stability and the safety of detection plant running.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the most right
The all possible combination of each technical characteristic in above-described embodiment is all described, but, if these skills
There is not contradiction in the combination of art feature, is all considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, its describe more concrete and
In detail, but therefore can not be interpreted as the restriction to utility model patent scope.It should be pointed out that, it is right
For those of ordinary skill in the art, without departing from the concept of the premise utility, it is also possible to do
Going out some deformation and improvement, these broadly fall into protection domain of the present utility model.Therefore, this utility model is special
The protection domain of profit should be as the criterion with claims.
Claims (8)
1. a transformer neutral point DC current measurement apparatus, it is characterised in that include outside work electricity
The AC voltages transmission of source input, to the low-voltage protection module excessively of power module, crosses low-voltage protection with described
Module is connected, described alternating voltage is converted to the described power supply mould that DC voltage is powered to Hall element
Block, be connected with described power module, signal is amplified filtering and Hall energized process after output give every
From the described Hall element of transmitting module, and it is connected with described Hall element, described Hall is passed
The signal of sensor output exports after carrying out pick-up process and carries out DC current measurement to backstage observing and controlling harvester
Monitoring in real time and the described isolation transmitting module of data record；
One end of described Hall element connects described low-voltage protection module of crossing by described power module, separately
One end connects described isolation transmitting module.
Transformer neutral point DC current measurement apparatus the most according to claim 1, it is characterised in that
Also include tainless terminal case and copper bar；Described copper bar runs through the casing both sides of described tainless terminal case；Institute
State Hall element sheathed or be engaged on the described copper bar in described tainless terminal case.
Transformer neutral point DC current measurement apparatus the most according to claim 2, it is characterised in that
Described copper bar is insulative water-proof interface with the interface of described tainless terminal case.
4. according to the transformer neutral point DC current measurement apparatus described in claims 1 to 3 any one,
It is characterized in that, described isolation transmitting module is Fiber isolation transmitter.
5. according to the transformer neutral point DC current measurement apparatus described in claims 1 to 3 any one,
It is characterized in that, described low-voltage protection module of crossing is self-reset over/under-voltage protector.
6. according to the transformer neutral point DC current measurement apparatus described in claims 1 to 3 any one,
It is characterized in that, described Hall element is Hall current sensor.
Transformer neutral point DC current measurement apparatus the most according to claim 6, it is characterised in that
Described Hall current sensor is direct measuring type Hall element.
8. according to the transformer neutral point DC current measurement apparatus described in claims 1 to 3 any one,
It is characterized in that, the analogue signal that signal is 4～20mA of described Hall element output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620211145.0U CN205506923U (en) | 2016-03-18 | 2016-03-18 | Transformer neutral point direct current measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620211145.0U CN205506923U (en) | 2016-03-18 | 2016-03-18 | Transformer neutral point direct current measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205506923U true CN205506923U (en) | 2016-08-24 |
Family
ID=56729663
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620211145.0U Active CN205506923U (en) | 2016-03-18 | 2016-03-18 | Transformer neutral point direct current measuring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154017A (en) * | 2016-08-31 | 2016-11-23 | 浙江西崎电气科技有限公司 | A kind of DC current sensor |
| CN108152559A (en) * | 2017-12-23 | 2018-06-12 | 中国西电电气股份有限公司 | A kind of integrated DC magnetic bias current measuring device and method |
| CN109188054A (en) * | 2018-09-26 | 2019-01-11 | 江苏史利姆智能测控技术有限公司 | A kind of device for extra-high voltage current detecting |
| CN109239440A (en) * | 2018-10-17 | 2019-01-18 | 新疆金风科技股份有限公司 | DC current sampling apparatus, method and modular multilevel converter system |
| CN111366767A (en) * | 2018-12-25 | 2020-07-03 | 西安西电高压开关有限责任公司 | Direct current measuring device |
| CN112305295A (en) * | 2020-11-11 | 2021-02-02 | 常州常荣传感技术有限公司 | Composite current sensor |
-
2016
- 2016-03-18 CN CN201620211145.0U patent/CN205506923U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106154017A (en) * | 2016-08-31 | 2016-11-23 | 浙江西崎电气科技有限公司 | A kind of DC current sensor |
| CN106154017B (en) * | 2016-08-31 | 2022-12-20 | 乐清市西崎电气科技有限公司 | Direct current sensor |
| CN108152559A (en) * | 2017-12-23 | 2018-06-12 | 中国西电电气股份有限公司 | A kind of integrated DC magnetic bias current measuring device and method |
| CN109188054A (en) * | 2018-09-26 | 2019-01-11 | 江苏史利姆智能测控技术有限公司 | A kind of device for extra-high voltage current detecting |
| CN109239440A (en) * | 2018-10-17 | 2019-01-18 | 新疆金风科技股份有限公司 | DC current sampling apparatus, method and modular multilevel converter system |
| CN111366767A (en) * | 2018-12-25 | 2020-07-03 | 西安西电高压开关有限责任公司 | Direct current measuring device |
| CN112305295A (en) * | 2020-11-11 | 2021-02-02 | 常州常荣传感技术有限公司 | Composite current sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231010 Address after: Room 1808, No. 500 Huanshi East Road, Yuexiu District, Guangzhou City, Guangdong Province, 510000 (not usable as a factory building) Patentee after: GUANGZHOU YUYANG ELECTRIC POWER TECHNOLOGY CO.,LTD. Address before: 22nd Floor, Building 3, Dongjun Plaza, No. 836 Dongfeng East Road, Guangzhou, Guangdong Province, 510080 Patentee before: GUANGZHOU YUENENG POWER TECHNOLOGY DEVELOPMENT Co.,Ltd. |
|
| TR01 | Transfer of patent right |