CN106526274A - Electronic current and voltage combined mutual inductor - Google Patents
Electronic current and voltage combined mutual inductor Download PDFInfo
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- CN106526274A CN106526274A CN201510567990.1A CN201510567990A CN106526274A CN 106526274 A CN106526274 A CN 106526274A CN 201510567990 A CN201510567990 A CN 201510567990A CN 106526274 A CN106526274 A CN 106526274A
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Abstract
The invention provides an electronic current and voltage combined mutual inductor, and the mutual inductor comprises a secondary conductor passing through a primary conductor. An epoxy cylinder is disposed between the primary conductor and the secondary conductor, and the internal and external surfaces of the epoxy cylinder are uniformly coated with semiconductor paint. An outer side wall of the secondary conductor is provided with a coil current transformer and a coaxial capacitor voltage divider, and the outer side wall of the secondary conductor is coaxially provided with an internal shielding cylinder and an external shielding cylinder, wherein the internal shielding cylinder and the external shielding cylinder are coaxially set with the secondary conductor. In use, each coil is placed in an annular cavity formed by the internal shielding cylinder and the external shielding layer. The mutual inductor is simple in structure, and is convenient to use. Meanwhile, the external shielding cylinder and the internal shielding cylinder cooperate to wrap the coil, thereby solving a problem that a Rogowski Coil is liable to be affected by the outside.
Description
Technical field
The present invention relates to a kind of electronic current-voltage combination transformer.
Background technology
As power system develops to Large Copacity, supertension and extra-high voltage direction, to power equipment miniaturization,
Intellectuality, the requirement of high reliability also more and more higher.For the 110KV that national grid is proposed to intelligent grid
, using double protection philosophies, voltage transformer need to be using double sense heads for level above power station measuring system.
Active Electronic Current Transformer mainly uses Luo-coil and low-power coil as transformer, tradition
Electronic current mutual inductor is fixed to coil by squeezing action, this installation side by adjusting Top fastening screw
Formula coil is difficult to fix well, and needs many parts, installation to waste time and energy when installing, and due to
Luo-coil belongs to non magnetic skeleton, easily receives external interference in small-signal, affects certainty of measurement.
Capacitance partial pressure structure being adopted electronic type voltage transformer at present, using primary shielding cover and suspension cylinder more
Coaxial configuration as high-voltage capacitance, with the coaxial metal Rotating fields of dielectric as low-voltage capacitance, low pressure
After capacitive side above resistance introducing harvester, integrated, amplification, double modulus are changed, by broadcasting and TV converting means
Put and be converted into after optical signal only intelligent acess combining unit synchronization process in measurement protection equipment.
The content of the invention
The technical problem to be solved in the present invention, is that a kind of coil of offer is easy for installation, coil current transformer
It is not susceptible to the electronic current-voltage combination transformer of external interference.
What the present invention was realized in：A kind of electronic current-voltage combination transformer, including being located in once
Secondary conductor on conductor, is provided with epoxy cylinder between the Primary Conductor and secondary conductor, the epoxy cylinder
Surfaces externally and internally is uniformly coated with semiconductor varnish；Install coil current transformer and coaxial in secondary conductor lateral wall
Capacitive divider；The secondary conductor lateral wall is axially arranged inner shield cylinder and an external shield cylinder, inner shield cylinder,
External shield cylinder is coaxially disposed with secondary conductor；Inner shield cylinder, one end of external shield cylinder are provided with front annular cover plate,
The annular cover plate makes to form the annular housing of accommodating coil current transformer between the inside and outside shielding cylinder at the end,
It is provided with the inside and outside shielding cylinder or annular cover plate and is coaxially set and is used for the inside and outside shielding cylinder
The branch sleeve being set on corresponding secondary conductor lateral wall；The coaxial capacitive voltage divider includes high voltage electricity
Hold and low-voltage capacity, the coaxial capacitive voltage divider is provided with least two low-voltage capacitances, each low-voltage capacitance
Form voltage transformer output all the way.
Wherein, the inside and outside shielding cylinder is wholely set with front annular cover plate, the rear end of branch sleeve perpendicular to
It is axially arranged with and turns up, the rear end face for turning up is fitted with the front end face of front annular cover plate and is fixed with adpting flange.
Wherein, the low-voltage capacitance is by the intermediate capacitance screen sequentially coaxially laid on the outside of secondary conductor from inside to outside
Constitute with the shield semiconductors paper between low-voltage capacitance screen, and intermediate capacitance screen and voltage capacitor screen；It is middle
Capacitance plate include at least two along same circle distribution, shoe, mutual nonconducting second metal layer, it is low
Threeth metal level of the voltage capacitance screen for tubular.
Wherein, the secondary conductor lateral wall is close to be provided with the first metal layer.
Wherein, the Primary Conductor is wound on iron core, and wrapping up on the iron core has padded coaming, and described one
Shield semiconductors paper is coated with the outside of partial conductor, iron core and padded coaming.
It is an advantage of the current invention that：
Each coil is installed in the annular housing that inner shield cylinder, external shield cylinder are formed when one, use, its
Simple structure, it is easy to use；External shield cylinder, inner shield cylinder coordinate and wrap up coil simultaneously, solve
Luo-coil is easily by the problem of external interference.
Two, the present invention is separated into the intermediate capacitance screen of multiple electrical isolation parts by increase, for shape
Into multiple low-voltage capacitances, twin voltage transformer sensing head is capable of achieving, dual output, the function of double protections possess
Miniaturization, high anti-interference, high reliability, the advantage of low cost.
It is three, with low cost as shielding cylinder using the epoxy cylinder, and epoxy cylinder and semiconductor varnish storage
It is convenient, draw materials easily, while Electric Field Distribution effectively can be optimized, it is ensured that Primary Conductor, secondary conductor
The distance between without breakdown, so as to reach the life-span for extending insulant, run equipment and more pacify
It is complete reliable.
Description of the drawings
Fig. 1 is the structural representation of the electronic current-voltage combination transformer of the present invention；
Fig. 2 show the inner shield cylinder of the present invention, the structural representation of external shield cylinder.
Label declaration：
- 4 secondary conductor -5 of -3 coil current transformer of iron core -2 solenoid housing of -1 Primary Conductor
Annular cover plate -9 before -7 branch sleeve -8 of -6 collecting unit of vessel shell
- 12 dead ring -13 of annular cover plate after -10 external shield cylinder -11 of adpting flange
Inner shield cylinder -14
Specific embodiment
By describing technology contents of the invention, structural features in detail, realizing purpose and effect, below in conjunction with
Embodiment simultaneously coordinates accompanying drawing to be explained in detail.
Refering to shown in Fig. 1,2, a kind of electronic current-voltage combination transformer, including being located in Primary Conductor
Secondary conductor 5 on 2, is provided with epoxy cylinder, the epoxy cylinder between the Primary Conductor 2 and secondary conductor 5
Surfaces externally and internally be uniformly coated with semiconductor varnish；Install coil current transformer 4 in 5 lateral wall of secondary conductor
And coaxial capacitive voltage divider.
The secondary conductor lateral wall is axially arranged inner shield cylinder 14 and an external shield cylinder 11, inner shield cylinder 14,
External shield cylinder 11 is coaxially disposed with secondary conductor；Inner shield cylinder 14, one end of external shield cylinder 11 are provided with front ring
Shape cover plate 9, the front annular cover plate 9 make to form accommodating coil current between the inside and outside shielding cylinder 11 at the end
The annular housing of transformer, be connected by screw on the rear end of external shield cylinder 11 for block inner shield cylinder 14,
The rear annular cover plate 12 in gap between external shield cylinder 11.Set between annular cover plate 12 and inner barrel rear end face afterwards
There is dead ring 13.It is provided with the inside and outside shielding cylinder 11 or front annular cover plate 9 and the inside and outside shielding
Cylinder is coaxially set and the branch sleeve 8 for being set on corresponding secondary conductor lateral wall；Branch sleeve 8
Rear end stretches out to be provided with and turns up, and the rear end face for turning up is fitted with the front end face of front annular cover plate and is provided with
Adpting flange 10, adpting flange 10 are fixed on front annular cover plate 9 by screw.
The coaxial capacitive voltage divider of the secondary conductor lateral wall includes high voltage electric capacity and low-voltage capacity, institute
State coaxial capacitive voltage divider and be provided with least two low-voltage capacities, each low-voltage capacitance forms mutual induction of voltage all the way
Device is exported.
Electronic current-voltage combination transformer as above, which is based on traditional SF6 gas-insulateds GIS and uses
Current/voltage combination transformer structure, outside is vessel shell 6, and coil current transformer 4 is fixed on line
In circle housing 3.Described Primary Conductor 2 and the composition current sensing head of coil current transformer 4, by electric current
The signal that sensing head is collected causes collecting unit 7, and Primary Conductor 2 passes through secondary conductor 5, secondary conductor 5
The insulation processing between described vessel shell 6.Correspondence is coaxially located in coaxial in Primary Conductor 2
Capacitor, its high-voltage capacitance are made up of Primary Conductor 2, secondary conductor 5 and the epoxy cylinder between them, and two
Partial conductor 5 is high-voltage capacitance screen.In the present embodiment, transformer uniquely can be with less parallel electricity inside which
Be exactly electric field between the epoxy shielding cylinder of secondary conductor 5 and the shielding paper of Primary Conductor 2.Epoxy
Shielding cylinder can effectively allow electric field to become comparison is round and smooth, the electric field in cylinder is in the smooth cylindrical plane.One
Partial conductor 2 is wound on iron core 1, and wrapping on the iron core 1 has a padded coaming, and shield semiconductors paper is by one
Partial conductor 2 and iron core 1 and padded coaming all shield ground connection so that once to secondary, it is secondary over the ground
Electric field can concentrate between epoxy cylinder and semiconducting paper, while 2 surface of Primary Conductor is similar to and is again
The circular configuration of rounding off, constitutes concentric circular cylinder with epoxy shielding cylinder so that Primary Conductor 2, secondary lead
Less parallel electric field can be produced between body 5 so that electric field intensity herein is relatively low, so using equipotential
Secondary conductor 5, the secondary electric field to once complexity are successfully become parallel electricity using quasiconductor epoxy cylinder by principle
, electric field intensity is low, as long as now controlling the distance between Primary Conductor 2 and secondary conductor 5, just
Ensure that the safe and reliable of product.
The epoxy resin adopted in present embodiment solidification, solidification when with very strong contractility, in order to true
Protect, epoxy shielding cylinder possesses very strong
Tensile resistance, and with certain elongation percentage, select epoxy shielding cylinder not only to possess this two performances,
Permeability can also be ensured well, do not fall paint under semiconductor varnish brushing high temperature, and a surface is made more after brushing
Smooth, uniform, so as to promote electric field to improve, epoxy insulation cylinder has preferable soft type and thermostability in addition,
Base material thickness has washability, is effectively easy to production.
In yet, the low-voltage capacitance is by sequentially coaxially cloth from inside to outside on the outside of secondary conductor 5
If intermediate capacitance screen and the quasiconductor screen between low-voltage capacitance screen, and intermediate capacitance screen and voltage capacitor screen
Cover paper composition；Intermediate capacitance screen include at least two along same circle distribution, shoe, it is mutually nonconducting
Second metal layer, threeth metal level of the low-voltage capacitance screen for tubular.High-voltage capacitance screen is with intermediate capacitance screen with him
Between dielectric form intermediate capacitance, each second metal layer and the 3rd metal level are respectively formed a biography
Sense head interface, build-out resistor in parallel constitute resistive-capacitive voltage divider circuit, are monolithically fabricated multihead, can be respectively
Sampled voltage signal circuit, connects collecting unit 7 by holding wire, and collecting unit 7 is arranged on pressure shell
On body 6, output numerical value optical signal, Jing optical fiber outputs, electron collection unit 7 requires to be arranged on good
The working environment of electronic loop in the object of electromagnetic shielding, is improved, electromagnetic interference is reduced, power supply is on the spot
Collecting unit 7 is powered, the problem for overcoming Current Transformer Using Active Compensation to exist, and exports the big of two ends parallel connection in low-voltage capacitance
Resistance, forms high voltage suppression circuit, in voltage collector input parallel low resistance, it is ensured that voltage signal
Change of disease precision.
Second metal layer, the 3rd metal level can adopt metal forming, between second metal layer and the 3rd metal level,
Dielectric between secondary conductor 5 and second metal layer can adopt insulation shielding paper, intermediate capacitance screen and
Low-voltage capacitance screen can be constituted using overall three-layer metal paper tinsel, be provided with insulation shielding paper between three-layer metal paper tinsel,
First layer metal paper tinsel is closely pasted on the outside of secondary conductor 5, with 5 conductive shorting of secondary conductor, ground floor gold
Category paper tinsel and secondary conductor 5 form high-voltage capacitance screen, and the second metal forming is intermediate capacitance screen, and the 3rd metal forming is
Low-voltage capacitance screen, Primary Conductor 2 and high-voltage capacitance screen and the epoxy cylinder between them form high-voltage capacitance, high
Voltage capacitance screen and intermediate capacitance screen and the dielectric between them form intermediate capacitance, intermediate capacitance screen with it is low
Voltage capacitance screen and the dielectric between them form low-voltage capacitance.The high-voltage capacitance screen and intermediate capacitance screen
Constitute two low-voltage capacitances, so integrally just constitute a high-voltage capacitance, two intermediate capacitances, two it is low
Voltage capacitance, from two intermediate capacitances number of winning the confidence respectively, two low-voltage capacitance sides, parallel high voltage suppression value is let out respectively
Electric discharge resistance, just constitutes double-sensing head difference sampled voltage signal.
Claims (5)
1. a kind of electronic current-voltage combination transformer, it is characterised in that：Including being located in Primary Conductor
Secondary conductor, be provided with epoxy cylinder, the interior appearance of the epoxy cylinder between the Primary Conductor and secondary conductor
Face is uniformly coated with semiconductor varnish；
Install coil current transformer and coaxial capacitive voltage divider in secondary conductor lateral wall；
The secondary conductor lateral wall is axially arranged inner shield cylinder and external shield cylinder, inner shield cylinder, external shield
Cylinder is coaxially disposed with secondary conductor；Inner shield cylinder, one end of external shield cylinder are provided with front annular cover plate, it is described before
Annular cover plate makes to form the annular housing of accommodating coil current transformer, institute between the inside and outside shielding cylinder at the end
State to be provided with inside and outside shielding cylinder or annular cover plate and be coaxially set with the inside and outside shielding cylinder and be used for covering
Loaded on the branch sleeve on corresponding secondary conductor lateral wall；
The coaxial capacitive voltage divider includes high voltage electric capacity and low-voltage capacity, the coaxial capacitive voltage divider
At least two low-voltage capacitances are provided with, each low-voltage capacitance forms voltage transformer output all the way.
2. a kind of electronic current-voltage combination transformer according to claim 1, it is characterised in that：
The inside and outside shielding cylinder is wholely set with front annular cover plate, and the rear end of branch sleeve is outer perpendicular to being axially arranged with
Turn over, the rear end face for turning up is fitted with the front end face of front annular cover plate and is fixed with adpting flange.
3. a kind of electronic current-voltage combination transformer according to claim 2, it is characterised in that：
The low-voltage capacitance is by the intermediate capacitance screen and low-voltage capacitance sequentially coaxially laid on the outside of secondary conductor from inside to outside
Screen, and the shield semiconductors paper composition between intermediate capacitance screen and voltage capacitor screen；Intermediate capacitance screen includes
At least two along same circle distribution, shoe, mutual nonconducting second metal layer, low-voltage capacitance screen is
3rd metal level of tubular.
4. a kind of electronic current-voltage combination transformer according to claim 3, it is characterised in that：
It is close to be provided with the first metal layer in the secondary conductor lateral wall.
5. a kind of electronic current-voltage combination transformer according to claim 4, it is characterised in that：
The Primary Conductor is wound on iron core, and wrapping on the iron core has padded coaming, the Primary Conductor, ferrum
Shield semiconductors paper is coated with the outside of core and padded coaming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510567990.1A CN106526274A (en) | 2015-09-09 | 2015-09-09 | Electronic current and voltage combined mutual inductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510567990.1A CN106526274A (en) | 2015-09-09 | 2015-09-09 | Electronic current and voltage combined mutual inductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106526274A true CN106526274A (en) | 2017-03-22 |
Family
ID=58345427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510567990.1A Pending CN106526274A (en) | 2015-09-09 | 2015-09-09 | Electronic current and voltage combined mutual inductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106526274A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597826A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Totally-enclosed epoxy resins insulation voltage transformer |
| CN109300576A (en) * | 2018-12-03 | 2019-02-01 | 大连北方互感器集团有限公司 | A kind of major insulation device and production method, voltage transformer and production method |
| CN112415248A (en) * | 2019-08-20 | 2021-02-26 | 西安西电高压开关有限责任公司 | Current-voltage transformer |
-
2015
- 2015-09-09 CN CN201510567990.1A patent/CN106526274A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597826A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Totally-enclosed epoxy resins insulation voltage transformer |
| CN108597826B (en) * | 2018-04-27 | 2020-11-24 | 上海大一互电力电器有限公司 | Totally-enclosed epoxy resin insulation voltage transformer |
| CN109300576A (en) * | 2018-12-03 | 2019-02-01 | 大连北方互感器集团有限公司 | A kind of major insulation device and production method, voltage transformer and production method |
| CN112415248A (en) * | 2019-08-20 | 2021-02-26 | 西安西电高压开关有限责任公司 | Current-voltage transformer |
| CN112415248B (en) * | 2019-08-20 | 2024-04-05 | 西安西电高压开关有限责任公司 | Current-voltage transformer |
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| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170322 |