CN207352061U - A kind of Rogowski coil for being used to measure weak current traveling wave - Google Patents
A kind of Rogowski coil for being used to measure weak current traveling wave Download PDFInfo
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- CN207352061U CN207352061U CN201721511762.3U CN201721511762U CN207352061U CN 207352061 U CN207352061 U CN 207352061U CN 201721511762 U CN201721511762 U CN 201721511762U CN 207352061 U CN207352061 U CN 207352061U
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- rogowski coil
- shielding
- metal shielding
- traveling wave
- weak current
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Abstract
The utility model provides a kind of Rogowski coil for being used to measure weak current traveling wave, including metal shielding and Rogowski coil, the Rogowski coil and metal shielding are semi-circular shape, the Rogowski coil is embedded in the metal shielding, and the metal shielding is equipped with annular opening close to tested side of wire.Using semi-circular structure, magnetic circuit is not easy saturation, the shortcomings that overcoming the easy saturation of whole-round Rogowski coil magnetic circuit at this stage, and there is shielding shell in Rogowski coil exterior design, high voltage, high-intensity magnetic field are influenced caused by it in practical applications for reduction, it is set to keep high-precision measurement under voltage levels, strong magnetic field circumstance, to line current high certainty of measurement, sensitive, wide range of measurement the requirement of response.Device volume is small.Shielding shell apertureization design makes the travelling wave current of tested conducting wire to interlink with Rogowski coil generation, is effectively measured.
Description
Technical field
Weak current traveling wave technical field of measuring equipment is the utility model is related to, it is more particularly to a kind of to be used to measure light current prevalence
The Rogowski coil of ripple.
Background technology
Transmission line of electricity is indispensable pith in power network.Its main function is conveying, distribution and exchanges electricity
Can, and several independent power grids are connected, interconnected network or integrated power system are formed, will once transmission line of electricity breaks down
Trigger long-time power outage.China's power transmission network is quickly grown to high voltage, high power capacity direction, therefore line status is monitored and is filled
Put the requirement for proposing higher.
Conventionally employed line current measuring device is the electromagnetic electric current sensor of ribbon core both at home and abroad, because it need to use iron
Core causes the shortcomings that sensor bulk is big, measurement frequency band is narrow, measurement range is small, slow in reacting, the opposing party as magnetic circuit carrier
, easily there is the phenomenon of magnetic circuit saturation because current sensor iron core is run in the environment of high load capacity, high current, causes line electricity in face
Drive test accuracy of measurement is low, is far unsatisfactory for the required precision at this stage to line status monitoring.Recently, to overcome iron core type current sense
The shortcomings of body product is big, measures line current, i.e., using a kind of air core coil that conducting wire is wound on non magnetic ring skeleton
Rogowski coil.Rogowski coil is small, easy to use, but since it is generally whole-round structure, in addition often in high electromagnetism, strong
Used in the environment of electric field, coil does not obtain good electromagnetic shielding, causes the easy saturation of its magnetic circuit, precise decreasing, measurement range
It is small, the shortcomings of being easily disturbed.
The content of the invention
Mirror, the utility model proposes a kind of Rogowski coil for being used to measure weak current traveling wave, can overcome wholecircle type with this
The shortcomings that Rogowski coil magnetic circuit easy saturation, to line current high certainty of measurement, respond sensitive, wide range of measurement.
What the technical solution of the utility model was realized in：A kind of Rogowski coil for being used to measure weak current traveling wave, bag
Metal shielding and Rogowski coil are included, the Rogowski coil and metal shielding are semi-circular shape, and the Rogowski coil is inlayed
In the metal shielding, the metal shielding is equipped with annular opening close to tested side of wire.
Further, it is cased with protective shell outside the metal shielding.
Further, air-gap is left between the metal shielding and the protective shell.
Further, epoxy filling is equipped between the metal shielding and the Rogowski coil.
Further, the metal shielding closes metal shielding made of material for perm.
Further, the annular opening on the metal shielding is wavy first annular opening, the metal screen
Cover shell and be equipped with shielding slab, the shielding slab and the metal shielding slidable connection, the shielding slab are equipped with wavy the
Second ring opening.
Compared with prior art, the beneficial effects of the utility model are：Using semi-circular structure, magnetic circuit is not easy saturation, gram
The shortcomings that having taken the easy saturation of whole-round Rogowski coil magnetic circuit at this stage, and have shielding shell in Rogowski coil exterior design, reduce
High voltage, high-intensity magnetic field are influenced caused by it in practical applications, it is kept high under voltage levels, strong magnetic field circumstance
The measurement of precision, to line current high certainty of measurement, sensitive, wide range of measurement the requirement of response.Device volume is small.Shield shell
Openingization design makes the travelling wave current of tested conducting wire to interlink with Rogowski coil generation, is effectively measured.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the utility model embodiment 1；
Fig. 2 is the theory structure schematic diagram of the utility model embodiment 1；
Fig. 3 is the opening maximum rating dimensional structure diagram of the utility model embodiment 2；
Fig. 4 is the opening minimum state dimensional structure diagram of the utility model embodiment 2；
In figure, 1 metal shielding, 2 Rogowski coils, 3 annular openings, 4 protective shells, 5 air-gaps, 6 epoxy fillings,
7 shielding slabs, 8 first annular openings, 9 second annular openings.
Embodiment
In order to be best understood from the utility model technology contents, specific embodiment is provided below, and with reference to attached drawing to this practicality
It is new to be described further.
Embodiment 1
Referring to Fig. 1 to 2, a kind of Rogowski coil for being used to measure weak current traveling wave of company provided by the utility model, including gold
Belong to shielding case 1 and Rogowski coil 2, the Rogowski coil 2 and metal shielding 1 are semi-circular shape, and the Rogowski coil 2 is inlayed
In the metal shielding 1, the metal shielding 1 is equipped with annular opening 3 close to tested side of wire.
Rogowski coil 2 uses semicircular structure, the shortcomings that effectively prevent wholecircle shape coil magnetic circuit easy saturation, coil output
It is larger, not only measurable weak current traveling wave, but also saturation is not easy under high current running environment.Further, the magnetic core of Rogowski coil 2
Material uses nanocrystalline material, nanocrystalline to possess excellent comprehensive magnetic energy, high saturation magnetic strength, high initial magnetoconductivity, in high magnetic
Possess the low characteristic of high-frequency loss under sense, can accurately measure weak current travelling wave signal.Rogowski coil 2 is placed in half-round metal screen
Cover in shell 1, metal shielding 1 possesses high magnetic permeability, the characteristic of low magnetic resistance, isolates interior or exterior space using metal shielding 1, can have
Effect hinders the transmission of external disturbance electromagnetic wave energy, and it is popular to prevent that ultra-high-tension power transmission line electromagnetic field from measuring light current to Rogowski coil 2
The interference of ripple, meanwhile, metal shielding 1 is designed with an annular opening 3 by tested side of wire, and the purpose that annular opening 3 designs is
The magnetic power of weak current traveling wave of tested conducting wire is interlinked with the Rogowski coil 2 in shielded layer, produce induced voltage, from
And measure current traveling wave.
Specifically, it is cased with protective shell 4 outside the metal shielding 1.By the one of metal shielding 1 and Rogowski coil 2
Makeup is placed in the protective shell 4, prevents corrosion.Further, the protective shell 4 is made of ABS fire proofings.
Specifically, leave air-gap 5 between the metal shielding 1 and the protective shell 4.Metal shielding 1 and protection
Medium is used air as between shell 4, is avoided that influence of the circuit temperature rise to sensor accuracy.
Specifically, epoxy filling 6 is equipped between the metal shielding 1 and the Rogowski coil 2.Can be effective
Isolating metal shielding case 1 and Rogowski coil 2.
Specifically, the metal shielding 1 closes metal shielding 1 made of material for perm.Perm is closed made of material
Metal shielding 1 possesses high magnetic permeability, the good characteristic of low magnetic resistance.
Embodiment 2
Referring to Fig. 3 to 4, difference lies in the annular opening 3 on the metal shielding 1 is the present embodiment with embodiment 1
Wavy first annular opening 8, the metal shielding 1 are equipped with shielding slab 7, the shielding slab 7 and the metal shielding 1
Slidable connection, the shielding slab 7 are equipped with wavy second annular opening 9.Due to 3 undulate of annular opening, work as movement
After shielding slab 7, the second annular opening 9 on shielding slab 7 can block a part of first annular opening 8 on metal shielding 1, etc.
The opening of effect is equal to the second annular opening 9 and the lap of first annular opening 8 on metal shielding 1 on shielding slab 7, leads to
Openings of sizes can be adjusted by crossing slight slip, can be adjusted according to the actual conditions of tested conducting wire, improve measurement accuracy and
Use scope.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on, should be included in the utility model
Protection domain within.
Claims (6)
- A kind of 1. Rogowski coil for being used to measure weak current traveling wave, it is characterised in that：Including metal shielding and Rogowski coil, institute It is semi-circular shape to state Rogowski coil and metal shielding, and the Rogowski coil is embedded in the metal shielding, the gold Belong to shielding case and be equipped with annular opening close to tested side of wire.
- A kind of 2. Rogowski coil for being used to measure weak current traveling wave as claimed in claim 1, it is characterised in that：The metal screen Cover and protective shell is cased with outside shell.
- A kind of 3. Rogowski coil for being used to measure weak current traveling wave as claimed in claim 2, it is characterised in that：The metal screen Cover and leave air-gap between shell and the protective shell.
- A kind of 4. Rogowski coil for being used to measure weak current traveling wave as claimed in claim 1, it is characterised in that：The metal screen Cover and epoxy filling is equipped between shell and the Rogowski coil.
- A kind of 5. Rogowski coil for being used to measure weak current traveling wave as claimed in claim 1, it is characterised in that：The metal screen Cover shell and close metal shielding made of material for perm.
- A kind of 6. Rogowski coil for being used to measure weak current traveling wave as claimed in claim 1, it is characterised in that：The metal screen It is wavy first annular opening to cover the annular opening on shell, and the metal shielding is equipped with shielding slab, the shielding slab with The metal shielding slidable connection, the shielding slab are equipped with wavy second annular opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721511762.3U CN207352061U (en) | 2017-11-14 | 2017-11-14 | A kind of Rogowski coil for being used to measure weak current traveling wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721511762.3U CN207352061U (en) | 2017-11-14 | 2017-11-14 | A kind of Rogowski coil for being used to measure weak current traveling wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207352061U true CN207352061U (en) | 2018-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721511762.3U Active CN207352061U (en) | 2017-11-14 | 2017-11-14 | A kind of Rogowski coil for being used to measure weak current traveling wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207352061U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289046A (en) * | 2019-06-26 | 2019-09-27 | 浙江诺尔康神经电子科技股份有限公司 | A kind of electric field shielding device not influencing wireless coupling transmission coil efficiency of transmission |
| CN111122949A (en) * | 2020-01-15 | 2020-05-08 | 中北大学 | TMR and Rogowski coil composite current testing method |
-
2017
- 2017-11-14 CN CN201721511762.3U patent/CN207352061U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110289046A (en) * | 2019-06-26 | 2019-09-27 | 浙江诺尔康神经电子科技股份有限公司 | A kind of electric field shielding device not influencing wireless coupling transmission coil efficiency of transmission |
| CN111122949A (en) * | 2020-01-15 | 2020-05-08 | 中北大学 | TMR and Rogowski coil composite current testing method |
| CN111122949B (en) * | 2020-01-15 | 2021-12-03 | 中北大学 | TMR and Rogowski coil composite current testing method |
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