CN206818781U - A kind of doublewound take of single can heavy impulse current sensor - Google Patents
A kind of doublewound take of single can heavy impulse current sensor Download PDFInfo
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- CN206818781U CN206818781U CN201720593020.3U CN201720593020U CN206818781U CN 206818781 U CN206818781 U CN 206818781U CN 201720593020 U CN201720593020 U CN 201720593020U CN 206818781 U CN206818781 U CN 206818781U
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Abstract
The utility model discloses a kind of single it is doublewound take can heavy impulse current sensor, including silicon steel core, take can winding, measurement winding, coil shielding case, circuit unit shielding case and communication interface；Signal processing unit and energy conditioning unit are provided with circuit unit shielding case, the silicon steel core is placed in coil shielding case, takes energy winding to be wound in the right half part of silicon steel core by the way of spaced winding, takes energy winding to be connected to energy conditioning unit by connecing hole；Measurement winding is wound in the left-half of silicon steel core by the way of spaced winding, and measurement winding is connected to signal processing unit by connecing hole；It is respectively arranged with coil shielding case and prolongs Longitudinal extending and prolong the gap extended laterally.The utility model is directed under overvoltage channel circumference complex electromagnetic environment, the problem of the supply difficulty of power supply, using heavy impulse current pickup wire coil structures, is designed induction energy fetching, is drawn the energy of heavy impulse current, supplied without external power source, not loss system energy.
Description
Technical field
It the utility model is related to current acquisition field, and in particular to a kind of doublewound take of single can heavy impulse current sensing
Device.
Background technology
The heavy impulse current occurred in power system is mainly including high current caused by lightning current, internal overvoltage.In electricity
In Force system, lightning current is monitored, can accurately understand the characteristic of lightning current, to research lightning performance, analysis lightening hazard,
Identifying lightning stroke trip accident responsibility, inquiring into lightning protection countermeasure and providing accurate initial data etc. for Insulation Coordination design has very
Important theory and realistic meaning；It is general that the proposition of lightning current and transmission line lightning stroke information measurement new technology can obtain the whole world
All over the actual measurement lightning current parameter lacked, and existing parameter is effectively corrected, improve Lightning Stroke Model.Also include in power system
Internal system energy dress change and transmit etc. caused by overvoltage, equally can produce heavy impulse current on transmission line of electricity etc..Impact
High current may be caused by many factors, and the analysis to accident judges to bring difficulty, therefore develop a set of energy complete documentation impact
High current waveform and various parameters, and the data of record are preserved to the equipment stored, accident can be analyzed for staff and be provided by force
Strong foundation, finally according to the insulation characterisitic of electrical equipment and protection feature and the overvoltage parameter of record be Insulation Coordination and
Overvoltage protection provides foundation and help.
Heavy impulse current measuring method mainly has at present：Magnetic link method, lightning location system, magnetic tape method, Rogowski coil method.
Consider sensitivity, measurement accuracy, the factor such as complete lightning current waveform and time, cost can be measured, based on Rogowski coil
Measuring method be best suitable for for heavy impulse current waveform measurement record.But Rogowski coil method is in use, still there is certain office
Limit.
First, sensing system hardware requirement used in existing Rogowski coil method is higher, costly, while often
Complicated, volume is larger, is not easy to install and use；Signal processing system need to be by cable connection, in power delivery circuit with coil
Etc. application places, longer cable is needed, while under the electromagnetic environment of complexity, it is the problems such as insulation, signal shielding need to be considered, difficult
To realize.
Secondly because heavy impulse current channel circumference electromagnetic environment is complicated, the supply of power supply is that sensor application key is asked
One of topic.Because sensor and signal pickup assembly need to be arranged on shaft tower etc. close to the position of ultra-high-tension power transmission line, it is impossible to use
Normal power supplies.Moreover, due to working in the wild, it is necessary to long-term non-maintaining, the reliability of power supply is proposed it is very high will
Ask.Being possibly used for the energy-provision way of lightning surge mainly includes：Solar energy energy supply, laser power supply, induction energy fetching etc..Solar energy
Energy supply is big by regional impact, and photoelectric transformation efficiency is low, lacks long-term non-maintaining ability；Laser power supply cost is higher, while needs low
Voltage source produces laser, limits application；Existing induction energy fetching method is more to take energy by electromagnetic induction by transmission line of electricity, only
The place of transmission line of electricity is can apply to, application is narrower, while loss system energy, influences transmission line of electricity other equipment
Operation.
Utility model content
In view of this, the purpose of this utility model be to provide a kind of single it is doublewound take can heavy impulse current sensor,
The current sensor is directed under lightning surge channel circumference complex electromagnetic environment, the problem of the supply difficulty of power supply, utilizes punching
Large current sensor loop construction is hit, designs induction energy fetching, draws the energy of heavy impulse current, is supplied without external power source, no
Loss system energy..
The purpose of this utility model realizes that a kind of doublewound take of single can impact greatly by such technical scheme
Current sensor, including silicon steel core 1, take can winding 2, measurement winding 3, coil shielding case 4, circuit unit shielding case 5 and logical
Communication interface 6；Signal processing unit and energy conditioning unit, the energy conditioning unit are provided with the circuit unit shielding case
It is connected with signal processing unit, the signal processing unit is connected with communication interface；The silicon steel core is placed in coil shielding case
It is interior, the right half part for taking energy winding to be wound in silicon steel core by the way of spaced winding, take energy winding to be connected to by connecing hole
Energy conditioning unit；The measurement winding is wound in the left-half of silicon steel core by the way of spaced winding, and measurement winding passes through
Connect hole and be connected to signal processing unit；It is respectively arranged with the coil shielding case and prolongs Longitudinal extending and prolong the seam extended laterally
Gap.
Further, the circuit unit shielding case is structure as a whole with coil shielding case.
Further, the communication interface is arranged in metallic shielding structure.
Further, the energy conditioning unit include be sequentially connected overvoltage protective module, rectification module, charging capacitor,
Voltage reduction module and Voltage stabilizing module.
Further, the overvoltage protective module includes being connected to the transient surge voltage taken between energy winding and rectification module
Killer tube D2.
Further, the overvoltage protective module also includes the electrical surge electricity being connected between rectification module and charging capacitor
Constrain tubulation D3.
Further, the signal processing unit includes the Nonvolatile ferroelectric memory electricity for taken at regular intervals communication data
Road, the Nonvolatile ferroelectric memory circuit are connected with communication interface.
By adopting the above-described technical solution, the utility model has the following advantages：
1st, under lightning surge channel circumference complex electromagnetic environment, the problem of the supply difficulty of power supply, impact is utilized
Large current sensor loop construction, induction energy fetching is designed, draw the energy of heavy impulse current, supplied, do not damage without external power source
Consume system capacity.
2nd, taking energy unit and signal processing unit are installed against coil, and collection signal automatically to be stored in non-volatile memories
Device, without any wiring during work, solves the transmission problem of electric energy, signal.
3rd, the utility model is simple in construction, and cost is cheap, easy to operate, is easily installed use, can apply to a variety of occasions.
Brief description of the drawings
In order that the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with accompanying drawing to this practicality
It is new to be described in further detail, wherein：
Fig. 1 can large current sensor scheme of installation to take；
Fig. 2 can large current sensor structural representation to take；
Fig. 3 is energy conditioning unit schematic diagram；
Fig. 4 is FeRAM circuit schematic diagram.
Embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail；It is it should be appreciated that it is preferred that real
Example is applied only for illustrating the utility model, rather than in order to limit the scope of protection of the utility model.
Single is doublewound to take energy heavy impulse current sensor to be based on Rogowski coil, is installed on high current passage (as transmitted electricity
Circuit) on, when overvoltage produces, adjoint high current produces high-intensity magnetic field in channel circumference, and taking energy coil passes through electromagnetic induction
Induced-current is produced, so as to obtain energy, supplies measuring coil, again by electromagnetic induction principle measurement heavy impulse current ginseng
Number.Large current sensor scheme of installation such as Fig. 1.
Such as Fig. 2, the sensor includes silicon steel core 1, takes energy winding 2, measurement winding 3, coil shielding case 4, circuit unit
Shielding case 5 and communication interface 6；Signal processing unit and energy conditioning unit are provided with the circuit unit shielding case.Silicon steel
Magnetic core is placed in coil shielding case, and using the structure for opening air gap, width of air gap 1mm, material uses silicon steel, and relative permeability is
8000, magnetic core size：External diameter, internal diameter, thickness are respectively 150/130/20mm.Energy winding is taken to be wound in by the way of spaced winding
The right half part of silicon steel core；With reduce frequency it is higher when, kelvin effect etc. internally resistance influence.Energy winding is taken to use section
The uniform circle of coiling 50 of diameter 1mm enamel covered wires, energy conditioning unit is connected to by connecing hole.Winding is measured equally using spaced winding
Mode, is wound in the left-half of silicon steel core, and measurement winding uses the uniform circle of coiling 100 of diameter of section 1mm enamel covered wires, led to
Cross and connect hole and be connected to signal processing unit.Coil shielding shell material selects 2mm stainless steels, is set respectively on the coil shielding case
Have and prolong Longitudinal extending and prolong the gap extended laterally.Transverse slot enables the main field of electric current to enter coil, if without horizontal stroke
An electric current Ip can be induced to gap, on coil shielding case, it forces magnetic flux not by coil shielding case；The gap of longitudinal direction
Prevent on coil shielding case formed bypass magnetic flux so that magnetic field concentration on shielding case, and cannot be introduced into inside make it is coil-induced
(because much bigger than air of magnetic conductivity of iron, there is gap, loop is not become on shielding case, magnetic resistance becomes big, and magnetic flux is also with regard to energy
Enough enter in shielding case).Circuit unit shielding shell material equally selects 2mm stainless steels, is welded as a whole with coil shielding case；Energy
Amount conditioning unit is connected to signal processing unit, is the energy supply of the processes such as signal acquisition process；Signal processing unit includes non-volatile
Property FeRAM circuit, while be connected to communication interface, gathered for regularly data communication；Communication interface uses metal screen
Shield structure, including communication energy supply line and communication signal line interface, for the heavy impulse current periodically read from ferroelectric memory
The data such as time/current peak.
Such as Fig. 3, energy conditioning unit includes overvoltage protective module, rectification module, charging capacitor, the decompression mould being sequentially connected
Block and Voltage stabilizing module.The effect of energy conditioning unit be to take can after the heavy impulse current energy that senses of winding handled,
Make the energy stable, that collecting unit energy requirements can be met and export and collecting unit is energized.Joint J1 accesses energy
Winding termination, front end overvoltage protection transient surge voltage killer tube, which is released, once to be protected, when a wing passage produces the big electricity of impact
During stream, secondary survey senses generation induced-current, rectified, and charging capacitor is charged, when energy supply voltage is more than 90V, unwanted currents
Released by two level overvoltage protection transient surge voltage killer tube part.Charging capacitor magnitude of voltage is in DC/DC decompression chip inputs
In voltage range, charging capacitor is depressured chip discharge to DC/DC.DC/DC voltage reduction modules use LM5009 chips, to signal transacting
Circuit provides 5V dc source.
FeRAM circuit uses chip FM31256.The FRAM that FM31256 is integrated with 256kb capacity non-volatile is deposited
Reservoir, real-time clock (RTC).Memory can carry out unconfined read-write in theory, and write operation is no-delay, and power failure data can preserve
10 years.Storage for data after the transmission read-write and power down of data provides safeguard；The FRAM of 256kb capacity, it can store in theory
Heavy impulse current amplitude/temporal information more than 1900 times；Real-time clock (RTC) can be calibrated.Led to using I2C bus modes
News, RTC, control function, memory read/write uniformly by two-wire system interface operation, save communication interface.FeRAM circuit
Controlled by signal processing circuit MCU and complete data storage and and external communication.
The utility model by way of induction energy fetching, can draw the energy of heavy impulse current, be sensor and signal
Processing system energizes.Using the doublewound loop construction of single, heavy impulse current measurement sensor is combined with draw-out power supply, letter
Change sensor construction, reduce sensor cost；Take can circuit and signal processing circuit installed against coil, during work without times
What wiring, avoids electric energy and signal long-distance transmissions under complex electromagnetic environment；Nonvolatile memory directly really impacts
High current data, periodic maintenance is avoided, improve operating efficiency.The utility model is simple in construction, and cost is cheap, easy to spread,
To analyze accident, improve the overvoltage protection measure of overhead transmission line, improve overhead transmission line Insulation Coordination it is horizontal, etc. tool
It is significant.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, it is clear that this area
Technical staff can to the utility model carry out it is various change and modification without departing from spirit and scope of the present utility model.This
Sample, if these modifications and variations of the present utility model belong to the utility model claims and its equivalent technologies scope it
Interior, then the utility model is also intended to comprising including these changes and modification.
Claims (7)
1. a kind of single is doublewound to take energy heavy impulse current sensor, it is characterised in that：Including silicon steel core (1), take can be around
Group (2), measurement winding (3), coil shielding case (4), circuit unit shielding case (5) and communication interface (6)；The circuit unit screen
Cover and signal processing unit and energy conditioning unit are provided with shell, the energy conditioning unit is connected with signal processing unit, institute
Signal processing unit is stated to be connected with communication interface；The silicon steel core is placed in coil shielding case, it is described take can winding use between
Around mode be wound in the right half part of silicon steel core, take can winding be connected to energy conditioning unit by connecing hole；The measurement
Winding is wound in the left-half of silicon steel core by the way of spaced winding, and measurement winding is connected to signal transacting list by connecing hole
Member；It is respectively arranged with the coil shielding case and prolongs Longitudinal extending and prolong the gap extended laterally.
2. a kind of single according to claim 1 is doublewound to take energy heavy impulse current sensor, it is characterised in that：It is described
Circuit unit shielding case is structure as a whole with coil shielding case.
3. a kind of single according to claim 1 is doublewound to take energy heavy impulse current sensor, it is characterised in that：It is described
Communication interface is arranged in metallic shielding structure.
4. a kind of single according to claim 1 is doublewound to take energy heavy impulse current sensor, it is characterised in that：It is described
Energy conditioning unit includes overvoltage protective module, rectification module, charging capacitor, voltage reduction module and the Voltage stabilizing module being sequentially connected.
5. a kind of single according to claim 4 is doublewound to take energy heavy impulse current sensor, it is characterised in that：It is described
Overvoltage protective module includes being connected to the transient surge voltage killer tube D2 taken between energy winding and rectification module.
6. a kind of single according to claim 5 is doublewound to take energy heavy impulse current sensor, it is characterised in that：It is described
Overvoltage protective module also includes the transient surge voltage killer tube D3 being connected between rectification module and charging capacitor.
7. a kind of single according to claim 1 is doublewound to take energy heavy impulse current sensor, it is characterised in that：It is described
Signal processing unit includes the Nonvolatile ferroelectric memory circuit for taken at regular intervals communication data, the Nonvolatile ferroelectric
Memory circuitry is connected with communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720593020.3U CN206818781U (en) | 2017-05-25 | 2017-05-25 | A kind of doublewound take of single can heavy impulse current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720593020.3U CN206818781U (en) | 2017-05-25 | 2017-05-25 | A kind of doublewound take of single can heavy impulse current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206818781U true CN206818781U (en) | 2017-12-29 |
Family
ID=60757126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720593020.3U Expired - Fee Related CN206818781U (en) | 2017-05-25 | 2017-05-25 | A kind of doublewound take of single can heavy impulse current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206818781U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109270337A (en) * | 2018-12-06 | 2019-01-25 | 石家庄杰泰特动力能源有限公司 | Passive and wireless current sensor based on double-winding current mutual inductor |
| CN110632468A (en) * | 2019-09-04 | 2019-12-31 | 国网辽宁省电力有限公司电力科学研究院 | Wireless cable partial discharge detection device, system and method based on high-frequency current sensor |
| CN112005122A (en) * | 2018-05-18 | 2020-11-27 | 株式会社电装 | Current sensor |
| CN115201628A (en) * | 2022-07-12 | 2022-10-18 | 云南电网有限责任公司电力科学研究院 | Cable energy-taking sampling double-thread device |
-
2017
- 2017-05-25 CN CN201720593020.3U patent/CN206818781U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112005122A (en) * | 2018-05-18 | 2020-11-27 | 株式会社电装 | Current sensor |
| CN109270337A (en) * | 2018-12-06 | 2019-01-25 | 石家庄杰泰特动力能源有限公司 | Passive and wireless current sensor based on double-winding current mutual inductor |
| CN110632468A (en) * | 2019-09-04 | 2019-12-31 | 国网辽宁省电力有限公司电力科学研究院 | Wireless cable partial discharge detection device, system and method based on high-frequency current sensor |
| CN115201628A (en) * | 2022-07-12 | 2022-10-18 | 云南电网有限责任公司电力科学研究院 | Cable energy-taking sampling double-thread device |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171229 Termination date: 20180525 |
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| CF01 | Termination of patent right due to non-payment of annual fee |