CN103107012B - A kind of electronic current mutual inductor and the online energy taking device in high-pressure side thereof - Google Patents
A kind of electronic current mutual inductor and the online energy taking device in high-pressure side thereof Download PDFInfo
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- CN103107012B CN103107012B CN201310001432.XA CN201310001432A CN103107012B CN 103107012 B CN103107012 B CN 103107012B CN 201310001432 A CN201310001432 A CN 201310001432A CN 103107012 B CN103107012 B CN 103107012B
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- iron core
- pressure side
- magnet valve
- taking device
- mutual inductor
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Abstract
The invention discloses a kind of electronic current mutual inductor and the online energy taking device in high-pressure side thereof, including high-pressure side power unit and with the online energy taking device in high-pressure side powered to high-pressure side power unit, the online energy taking device in high-pressure side includes shielding shell, shielding shell is built-in with iron core and Secondary Winding, Secondary Winding is wrapped on iron core, the line end of drawing of Secondary Winding is connected to shield on the binding post of shell peripheral hardware, iron core uses annular laminated core, the excircle of iron core is laid with one group of magnet valve, the narrow slot radially extended it is provided with at magnet valve, the front end face of the most through iron core of narrow slot and rear end face.The online energy taking device of the electronic current mutual inductor of the present invention and high-pressure side thereof arranges one group of magnet valve on iron core, when not only can effectively overcome bus current bigger, routine current transformer is difficult to the energy problem of stable acquisition relatively high power because of saturated, and electric current deadband upper limit is brought up to more than 20000A.
Description
Technical field
The invention belongs to technical field of power systems, be specifically related to a kind of electronic current mutual inductor and high-pressure side is online
Energy taking device.
Background technology
In modern power systems, electronic mutual inductor is monitoring primary equipment and the key equipment of system running state.
Wherein electronic current mutual inductor is divided into active type and passive according to high-pressure side the need of power supply.Along with microelectric technique and
Under the promotion of optical fiber technology, technology is more ripe, cost is reasonable, the active type electric mutual inductor of good stability comes into one's own, and has
Source electronic current mutual inductor with the insulating properties of its excellence, without magnetically saturated good characteristic, adapted to power system Large Copacity,
Voltage levels and the needs of automation development, be able to popularization and application in high-voltage electric power system.But, active electronic
Realize data communication by optical fiber between current transformer high and low pressure, there is no any electromagnetic connection, therefore, how to make high-pressure side
Electronic circuit obtains the electric energy supply technology that always obstruction Active Electronic Current Transformer is practical of continuous-stable
A difficult problem.
The energy-provision way of active electronic current transformer mainly has following several at present: 1) utilized by electromagnetic coupled
Primary side current takes energy from bus.2) utilize optical fiber that from low potential side, the luminous energy of laser or other light sources is sent to high potential
Side, then converted light energy into electric energy by electrooptical device (light cell), the power supply providing stable after voltage stabilizing exports；3) adopt
Use chargeable storage energy supply；4) ultrasound wave function is used；5) above several mixed function mode is used.
Current mutual inductor coil take online can circuit is simple, low cost, but its application difficult point is that bus current is not
Stationary value, and excursion is very big, when the small area analysis that bus current is close to zero load, transformer is difficult to obtain enough energy
Amount；When bus current is current state, iron core magnetic is saturated and makes Secondary Winding produce amplitude peaking voltage, because of it
Easily power circuit is caused damage and need to be suppressed, from the peak voltage of Microsecond grade pulsewidth, to obtain bigger merit simultaneously
Rate, technical difficulty is relatively big, so this energy-provision way exists bound electric current dead band, therefore magnetic induction coil must be taken into account the most simultaneously
Two kinds of maximum conditions little, maximum, the subsequent process circuit protected function of palpus, just can ensure that voltage stabilization exports, and otherwise may
Cause burning of subsequent conditioning circuit.Laser power supply stable performance, but structure is complicated, and energy supply power is less, and cost is higher, laser instrument
Life-span is short, and the relatively costly and conveying power of laser instrument itself is severely limited, must increase if increasing number of fibers
Add cost.There is the problems such as light cell conversion efficiency, cell degradation in chargeable storage energy-provision way, reliability is difficult to ensure that.
Chinese patent CN101309057A discloses a kind of ultrasonic energy supply apparatus, although energy supply power is relatively big, but knot
Structure is complicated, functional reliability it cannot be guaranteed that.
Chinese patent CN1909327A discloses a kind of conventional current transformer and takes the self-excitation source apparatus of energy, conventional electricity online
Current transformer iron core uses iron-based crystallite high initial magnetoconductivity magnetic material, and electric current deadband lower limit is 0.8A, the upper limit be 5000A with
On, take online and can be not more than 150mW by power.
Chinese patent CN201219065Y discloses a kind of active electronic photoelectric current inductor mixing power supply device, adopts
With two take online can current transformer to take into account two kinds of limiting cases of bus current minimax, be simultaneously used laser power supply
Technology solves electric current dead-time problem, the size of the complex and undeclared energy supply power of this apparatus structure.
Chinese patent CN202352507U discloses a kind of electronic current mutual inductor power supply in high voltage device, and this device is adopted
With coil take can and two kinds of powered mode combined of laser power supply, but in this device take can coil bigger at bus current
Time can be difficult to the energy of stable acquisition relatively high power because of saturated.
Therefore, for current transformer take online can for technology, take can power less and to there is electric current dead band be urgently
The problem solved.
Summary of the invention
It is an object of the invention to provide the online energy taking device in a kind of electronic current mutual inductor high-pressure side, to overcome current electricity
Current transformer take online can power little and there is the deficiency in electric current dead band, provide one to use this high-pressure side to take online and can fill simultaneously
The current transformer put.
In order to realize object above, the skill of the online energy taking device in electronic current mutual inductor high-pressure side provided by the present invention
Art scheme is as follows: the online energy taking device in a kind of electronic current mutual inductor high-pressure side, and including shielding shell, shielding shell is built-in with
Iron core and Secondary Winding, Secondary Winding is wrapped on iron core, and the line end of drawing of Secondary Winding is connected to shield connecing of shell peripheral hardware
In line terminals, described iron core uses annular laminated core, and the excircle of iron core is laid with one group of magnet valve, is provided with edge at described magnet valve
The narrow slot radially extended, the front end face of the most through iron core of described narrow slot and rear end face.
Described magnet valve is uniformly laid on the excircle of iron core.
The narrow slot at described each magnet valve cross sectional shape on iron core end face is parabola shaped.
The number of described magnet valve is at least 8～16.
Described iron core and Secondary Winding use epoxide resin vacuum to be cast in shielding shell.
The technical scheme of electronic current mutual inductor provided by the present invention is as follows: a kind of electronic current mutual inductor, bag
Including high-pressure side power unit and with the online energy taking device in high-pressure side powered to high-pressure side power unit, described high-pressure side takes online
Can include shielding shell by device, shielding shell is built-in with iron core and Secondary Winding, and Secondary Winding is wrapped on iron core, Secondary Winding
Draw line end be connected to shield shell peripheral hardware binding post on, described iron core use annular laminated core, the cylindrical of iron core
It is laid with one group of magnet valve week, at described magnet valve, is provided with the narrow slot radially extended, the front end of the most through iron core of described narrow slot
Face and rear end face.
Described magnet valve is uniformly laid on the excircle of iron core.
Described magnet valve cross sectional shape on iron core end face is parabola shaped.
The number of described magnet valve is at least 8～16.
Described iron core and Secondary Winding use epoxide resin vacuum to be cast in shielding shell.
The online energy taking device of the electronic current mutual inductor of the present invention and high-pressure side thereof arranges one group of magnet valve on iron core, when
Time on bus by industrial frequency AC electric current, alternating flux will be produced in annular laminated core.When bus current by little to
When changing greatly, the magnetic flux in iron circuit also grows from weak to strong change, and magnet valve magnetic circuit part is from inner periphery along radial direction gradually
Saturated.Owing to the pcrmeability of fully saturated magnet valve magnetic circuit is equal to air permeability, therefore, magnet valve magnetic circuit is never saturated to completely
Saturated process is considered as " air gap " length process from the zero to magnet valve width nonlinear change, and air gap can be substantially reduced
The Effective permeability of whole magnetic circuit, air gap is the biggest, and effect is the most notable.When bus current dynamic range be 50A～
During 20000A, iron core Effective permeability change can be adaptive to the change of primary current, can realize to iron core flux change from
Dynamic control, thus extend the pulsewidth of Secondary Winding sensing peak voltage, reach tens milliseconds, it is sufficient to meet about 1W floated
The energy supply of power supply needs.Compared with prior art, routine Current Mutual Inductance when the present invention not only can effectively overcome bus current bigger
Device is difficult to the energy problem of stable acquisition relatively high power because of saturated, and electric current deadband upper limit is brought up to more than 20000A,
A kind of economical and practical method is provided for solving the energy supply problem of high-tension electricity equipment high-pressure side large power supply.
The parabolic shape of magnet valve be relatively preferably coordinate between a bus current and iron core Effective permeability linear.
Accompanying drawing explanation
Fig. 1 is the structural representation of the online energy taking device in electronic current mutual inductor high-pressure side of the present invention；
Fig. 2 is laminated core structural representation.
Detailed description of the invention
With specific embodiment, the present invention is further described below in conjunction with the accompanying drawings.
It is illustrated in figure 1 the structural representation of the online energy taking device in electronic current mutual inductor high-pressure side of the present invention, by scheming
Understanding, the online energy taking device in high-pressure side of this current transformer includes shielding shell 1, and shielding shell is built-in with iron core 4 and secondary
Winding 5, Secondary Winding is wrapped on iron core, and the line end of drawing of Secondary Winding is connected to shield on the binding post 2 of shell peripheral hardware,
Iron core uses annular laminated core, and the excircle of iron core is laid with one group of magnet valve, is provided with the narrow slot radially extended at magnet valve, narrow
Groove runs through front end face and the rear end face of iron core vertically, and this online energy taking device punching is enclosed within a bus 3.
For optimizing further, the magnet valve of the present invention is at least 8～16, and is uniformly laid on the excircle of iron core.
Further, the cross sectional shape on iron core end face of the narrow slot at each magnet valve uses parabola shaped, for taking online
Can for current transformer, the parabolic shape of magnet valve be between a bus current and iron core Effective permeability the most preferably
Coordinate linear.
As shown in Figure 2, the present embodiment uses 12 magnet valves to the structural representation of annular laminated core 4: iron core 4 material is
50W400 stalloy, machined, heat treatment, stacking and dipping process, iron core 4 external diameter is 96mm, internal diameter is 64mm, a height of
16mm, is circumferentially uniformly distributed 12 magnet valves, is provided with the narrow slot of parabolic shape at each magnet valve.
Secondary Winding 5 usesEnamel-covered wire annularly iron core 4 even circumferential around 200 circles, draw line end soldering
It is connected on the binding post 2 on aluminum shielding shell 1.Iron core 4 and Secondary Winding 5 use epoxy resin 6 vacuum pouring to shield at aluminum
In shell 1, the effects such as dust-proof, moistureproof, vibrationproof, insulation and electromagnetic shielding can be played.
When the ascending change of bus current, the magnetic flux in iron circuit also grows from weak to strong change, magnet valve magnetic circuit part
Divide the most saturated along radial direction from inner periphery.Owing to the pcrmeability of fully saturated magnet valve magnetic circuit is equal to air permeability, because of
This, magnet valve magnetic circuit is never saturated to fully saturated process, and to be considered as " air gap " length non-linear from the zero to magnet valve width
The process of change.Air gap can be substantially reduced the Effective permeability of whole magnetic circuit, and air gap is the biggest, and effect is the most notable.In iron circuit,
12 " air gap " length are with bus current size variation generation nonlinear change, thus cause iron core Effective permeability also with bus
Size of current changes and changes.When a bus current dynamic range is 50A～20000A, iron core Effective permeability becomes
Change can be adaptive to the change of primary current, can realize automatically controlling iron core flux change, thus extend Secondary Winding
The pulsewidth of sensing peak voltage, reaches tens milliseconds, it is sufficient to meet the energy supply needs of the floated power supply of about 1W.
The electronic current mutual inductor of the present invention includes high-pressure side power unit and to power to high-pressure side power unit
The online energy taking device in high-pressure side, the online energy taking device in high-pressure side uses structure as above.
The operation principle of electronic current mutual inductor of the present invention is as follows: when on a bus 3 by industrial frequency AC electric current,
Alternating flux will be produced in annular laminated core 4.According to Lenz's law, alternating flux makes Secondary Winding 5 produce induced voltage.
The size of induced voltage and bus current, the Effective permeability of iron core 4, the sectional area of iron core 4 and the circle of Secondary Winding 5
Number is directly proportional, and is inversely proportional to the circumference of iron core 4.In the present embodiment, the sectional area (2.56cm2) of iron core 4 and Secondary Winding 5
The number of turn (200) can ensure that when a bus current is 50A, taking of transformer can reach 1W by power；When a bus current is at 50A
～in the range of 20000A during change, use magnet valve technology, it is adaptive to a bus current by the change of iron core Effective permeability
Change to control the change of iron core magnetic flux, it is achieved that in the case of the biggest electric current (20000A), transformer takes online and can reach by power
1W。
Compared with prior art, electronic current mutual inductor and the online energy taking device thereof of the present invention not only can effectively overcome
When bus current is bigger, routine current transformer is difficult to the energy problem of stable acquisition relatively high power because of saturated, and by electric current
Deadband upper limit brings up to more than 20000A, provides one for solving the energy supply problem of high-tension electricity equipment high-pressure side large power supply
Plant economical and practical method.
Claims (8)
1. the online energy taking device in electronic current mutual inductor high-pressure side, including shielding shell, shielding shell is built-in with iron core
And Secondary Winding, Secondary Winding is wrapped on iron core, and the line end of drawing of Secondary Winding is connected to shield the terminals of shell peripheral hardware
On son, it is characterised in that: described iron core uses annular laminated core, and the excircle of iron core is laid with one group of magnet valve, described magnet valve
Place is provided with the narrow slot radially extended, the front end face of the most through iron core of described narrow slot and rear end face；At described each magnet valve
Narrow slot cross sectional shape on iron core end face is parabola shaped, this device can be applicable to bus current at 50A～
Dynamically change between 20000A.
The online energy taking device in electronic current mutual inductor high-pressure side the most according to claim 1, it is characterised in that: described
Magnet valve is uniformly laid on the excircle of iron core.
The online energy taking device in electronic current mutual inductor high-pressure side the most according to claim 2, it is characterised in that: described magnetic
The number of valve is at least 8～16.
The online energy taking device in electronic current mutual inductor high-pressure side the most according to claim 3, it is characterised in that: described ferrum
Core and Secondary Winding use epoxide resin vacuum to be cast in shielding shell.
5. an electronic current mutual inductor, including high-pressure side power unit and with the high-pressure side powered to high-pressure side power unit
Online energy taking device, the online energy taking device in described high-pressure side includes shielding shell, and shielding shell is built-in with iron core and Secondary Winding,
Secondary Winding is wrapped on iron core, and the line end of drawing of Secondary Winding is connected to shield on the binding post of shell peripheral hardware, its feature
It is: described iron core uses annular laminated core, and the excircle of iron core is laid with one group of magnet valve, is provided with radially at described magnet valve
The narrow slot extended, the front end face of the most through iron core of described narrow slot and rear end face；Narrow slot at described each magnet valve is at iron core end
Cross sectional shape on face is parabola shaped, the online energy taking device in described high-pressure side can be applicable to bus current at 50A～
Dynamically change between 20000A.
Electronic current mutual inductor the most according to claim 5, it is characterised in that: described magnet valve is uniformly laid in iron core
Excircle on.
Electronic current mutual inductor the most according to claim 6, it is characterised in that: the number of described magnet valve be at least 8～
16.
Electronic current mutual inductor the most according to claim 7, it is characterised in that: described iron core and Secondary Winding use ring
Epoxy resins vacuum pouring is in shielding shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310001432.XA CN103107012B (en) | 2013-01-04 | 2013-01-04 | A kind of electronic current mutual inductor and the online energy taking device in high-pressure side thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310001432.XA CN103107012B (en) | 2013-01-04 | 2013-01-04 | A kind of electronic current mutual inductor and the online energy taking device in high-pressure side thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103107012A CN103107012A (en) | 2013-05-15 |
| CN103107012B true CN103107012B (en) | 2016-12-28 |
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| CN201310001432.XA Expired - Fee Related CN103107012B (en) | 2013-01-04 | 2013-01-04 | A kind of electronic current mutual inductor and the online energy taking device in high-pressure side thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104200978B (en) * | 2014-09-04 | 2016-06-29 | 国家电网公司 | A kind of current transformer intelligent electricity-fetching method |
| DE112015006452T5 (en) * | 2015-04-15 | 2017-12-28 | Mitsubishi Electric Corporation | Ignition coil for an internal combustion engine |
| CN108521145B (en) * | 2018-06-15 | 2023-11-14 | 毛俊轶 | Self-powered device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1658344A (en) * | 2005-03-10 | 2005-08-24 | 上海Mwb互感器有限公司 | Low-power electronic current mutual inductor |
| CN102226976A (en) * | 2011-04-07 | 2011-10-26 | 常熟开关制造有限公司(原常熟开关厂） | Current transformer |
| EP2151692A3 (en) * | 2008-08-06 | 2012-04-18 | REO Inductive Components AG | Compensation electricity converter |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS536827A (en) * | 1976-07-09 | 1978-01-21 | Mitsubishi Electric Corp | Core for current transformer |
| JPH06267396A (en) * | 1993-03-16 | 1994-09-22 | Hitachi Ltd | Zero-phase current transformer |
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2013
- 2013-01-04 CN CN201310001432.XA patent/CN103107012B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1658344A (en) * | 2005-03-10 | 2005-08-24 | 上海Mwb互感器有限公司 | Low-power electronic current mutual inductor |
| EP2151692A3 (en) * | 2008-08-06 | 2012-04-18 | REO Inductive Components AG | Compensation electricity converter |
| CN102226976A (en) * | 2011-04-07 | 2011-10-26 | 常熟开关制造有限公司(原常熟开关厂） | Current transformer |
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| CN103107012A (en) | 2013-05-15 |
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Granted publication date: 20161228 Termination date: 20190104 |