CN106526275A - Electronic current and voltage combined transformer - Google Patents
Electronic current and voltage combined transformer Download PDFInfo
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- CN106526275A CN106526275A CN201510568289.1A CN201510568289A CN106526275A CN 106526275 A CN106526275 A CN 106526275A CN 201510568289 A CN201510568289 A CN 201510568289A CN 106526275 A CN106526275 A CN 106526275A
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Abstract
The present invention provides an electronic current and voltage combined transformer, which comprises a secondary conductor penetratingly arranged on a primary conductor. An epoxy barrel is arranged between the primary conductor and the secondary conductor. The inner surface and the outer surface of the epoxy barrel are uniformly coated with semiconductor paint. The outer side wall of the secondary conductor is provided with a coil current transformer and a coaxial capacitive voltage divider. The coaxial capacitive voltage divider comprises a high-voltage capacitor and a low-voltage capacitor. The coaxial capacitive voltage divider is provided with at least two voltage capacitors. Each low-voltage capacitor forms one output path of a voltage transformer. According to the technical scheme of the invention, an intermediate capacitive screen capable of being separated into a plurality of electrically isolated portions is additionally arranged, so that a plurality of low-voltage capacitors are formed. Therefore, the functions of two voltage transformer sensing heads, two outputs and two protection mechanisms are realized. The electronic current and voltage combined transformer has the advantages of miniaturization, high interference resistance, high reliability, low cost and the like.
Description
Technical field
The present invention relates to a kind of electronic current-voltage combination transformer.
Background technology
It is as power system develops to Large Copacity, supertension and extra-high voltage direction, to power equipment miniaturization, intelligent, the requirement of high reliability also more and more higher.The 110KV level above power station measuring system proposed to intelligent grid for national grid adopts double protection philosophies, and voltage transformer need to be using double sense heads.
Capacitance partial pressure structure is adopted electronic type voltage transformer at present more; using the coaxial configuration of primary shielding cover and suspension cylinder as high-voltage capacitance; with the coaxial metal Rotating fields of dielectric as low-voltage capacitance; after low-voltage capacitance side above resistance introducing harvester, integrated, amplification, double modulus are changed, after broadcasting and TV conversion equipment is converted into 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 to provide a kind of electronic current-voltage combination transformer of double sense heads.
What the present invention was realized in：A kind of electronic current-voltage combination transformer, including the secondary conductor being located in Primary Conductor, is provided with epoxy cylinder between the Primary Conductor and secondary conductor, the surfaces externally and internally of the epoxy cylinder is uniformly coated with semiconductor varnish；Install coil current transformer and coaxial capacitive voltage divider in secondary conductor lateral wall, coaxial capacitive voltage divider includes high voltage electric capacity and low-voltage capacity, the coaxial capacitive voltage divider is provided with least two low-voltage capacitances, and each low-voltage capacitance forms voltage transformer output all the way.
Wherein, shield semiconductors paper of the low-voltage capacitance by the intermediate capacitance screen sequentially coaxially laid on the outside of secondary conductor from inside to outside and between low-voltage capacitance screen, and intermediate capacitance screen and voltage capacitor screen is constituted；Intermediate capacitance screen include at least two along same circle distribution, shoe, mutual nonconducting second metal layer, threeth metal level of the low-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 on the iron core has padded coaming, is coated with shield semiconductors paper on the outside of the Primary Conductor, iron core and padded coaming.
It is an advantage of the current invention that：
One, the present invention are capable of achieving twin voltage transformer sensing head by increasing the intermediate capacitance screen for being separated into multiple electrical isolation parts for forming multiple low-voltage capacitances; dual output, the function of double protections, possesses miniaturization; high anti-interference, high reliability, the advantage of low cost.
It is two, with low cost using the shielding cylinder, and epoxy cylinder and semiconductor varnish convenient storage, draw materials easily, Electric Field Distribution can effectively be optimized simultaneously, ensure that the distance between Primary Conductor, secondary conductor without breakdown, so as to reach the life-span for extending insulant, run equipment more safe and reliable.
Description of the drawings
Fig. 1 is the structural representation of the electronic current-voltage combination transformer of the present invention；
Label declaration：
- 6 collecting unit -7 of -5 vessel shell of iron core -1 Primary Conductor -2 solenoid housing -4 secondary conductor of -3 coil current transformer
Specific embodiment
By describing the technology contents of the present invention in detail, structural features, realizing purpose and effect, below in conjunction with embodiment and accompanying drawing is coordinated to be explained in detail.
Refering to shown in Fig. 1, a kind of electronic current-voltage combination transformer, including the secondary conductor 5 being located in Primary Conductor 2, is provided with epoxy cylinder between the Primary Conductor 2 and secondary conductor 5, the surfaces externally and internally of the epoxy cylinder is uniformly coated with semiconductor varnish；Install coil current transformer 4 and coaxial capacitive voltage divider in 5 lateral wall of secondary conductor, coaxial capacitive voltage divider includes high voltage electric capacity and low-voltage capacity, the coaxial capacitive voltage divider is provided with least two low-voltage capacitances, and each low-voltage capacitance forms voltage transformer output all the way.
Electronic current-voltage combination transformer as above, which is based on traditional SF6 gas-insulateds GIS electric current voltage combination transformer structure, and outside is vessel shell 6, and coil current transformer 4 is fixed in solenoid housing 3.The signal that current sensing head is collected is caused collecting unit 7 by described Primary Conductor 2 and the composition current sensing head of coil current transformer 4, and Primary Conductor 2 passes through secondary conductor 5, insulation processing between secondary conductor 5 and described vessel shell 6.Correspondence is coaxially located in the ganged condenser in Primary Conductor 2, and its high-voltage capacitance is made up of Primary Conductor 2, secondary conductor 5 and the epoxy cylinder between them, and secondary conductor 5 is high-voltage capacitance screen.In the present embodiment, transformer can be exactly uniquely electric field between the epoxy shielding cylinder of secondary conductor 5 and the shielding paper of Primary Conductor 2 with less parallel electric field inside which.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.Primary Conductor 2 is wound on iron core 1, on the iron core 1, wrapping has padded coaming, Primary Conductor 2 and iron core 1 and padded coaming are all shielded ground connection by shield semiconductors paper, so that once to secondary, secondary electric field over the ground can be concentrated between epoxy cylinder and semiconducting paper, 2 surface of Primary Conductor is similar to the circular configuration for rounding off again simultaneously, concentric circular cylinder is constituted with epoxy shielding cylinder, so that Primary Conductor 2, less parallel electric field can be produced between secondary conductor 5, so that electric field intensity herein is relatively low, so quasiconductor epoxy cylinder is successfully utilized by secondary conductor 5 using equipotential principle, it is secondary that parallel electric field is become to once complicated electric field, electric field intensity is low, as long as now controlling the distance between Primary Conductor 2 and secondary conductor 5, it is to ensure that the safe and reliable of product.
The epoxy resin adopted in present embodiment is in solidification, with very strong contractility during solidification, in order to ensure forming all pole symmetrically and evenly electric field between Primary Conductor 2 and secondary conductor 5, epoxy shielding cylinder possesses very strong tensile resistance, and with certain elongation percentage, epoxy shielding cylinder is selected not only to possess this two performances, permeability can also be ensured well, paint is not fallen under semiconductor varnish brushing high temperature, and make a surface more smooth after brushing, uniformly, so as to promote electric field to improve, in addition epoxy insulation cylinder has preferable soft type and thermostability, base material thickness has washability, effectively it is easy to production.
In yet, shield semiconductors paper of the low-voltage capacitance by the intermediate capacitance screen sequentially coaxially laid on the outside of secondary conductor 5 from inside to outside and between low-voltage capacitance screen, and intermediate capacitance screen and voltage capacitor screen is constituted；Intermediate capacitance screen include at least two along same circle distribution, shoe, mutual nonconducting second metal layer, threeth metal level of the low-voltage capacitance screen for tubular.High-voltage capacitance screen and intermediate capacitance screen form intermediate capacitance with the dielectric between them，Each second metal layer and the 3rd metal level are respectively formed a sensing head interface，Build-out resistor in parallel，Constitute resistive-capacitive voltage divider circuit，It is monolithically fabricated multihead，Sampled voltage signal circuit can be distinguished，Collecting unit 7 is connected by holding wire，Collecting unit 7 is arranged on vessel shell 6，Output numerical value optical signal，Jing optical fiber outputs，Electron collection unit 7 requires to be arranged on to be had in the object of good electromagnetic shielding，Improve the working environment of electronic loop，Reduce electromagnetic interference，Power supply is powered for collecting unit 7 on the spot，The problem for overcoming Current Transformer Using Active Compensation to exist，Two ends big resistance in parallel is exported in low-voltage capacitance，Form high voltage suppression circuit，In voltage collector input parallel low resistance，Ensure voltage signal change of disease precision.
Second metal layer、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，Insulation shielding paper is provided 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，First layer metal paper tinsel forms high-voltage capacitance screen with secondary conductor 5，Second metal forming is intermediate capacitance screen，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 and low-voltage capacitance screen and the dielectric between them form low-voltage capacitance.Described second metal layer structure, size all same, high-voltage capacitance screen constitutes two low-voltage capacitances with intermediate capacitance screen, it is so overall just to constitute a high-voltage capacitance, two intermediate capacitances, two low-voltage capacitances, from two intermediate capacitances number of winning the confidence respectively, in two low-voltage capacitance side difference parallel high voltage suppression value bleeder resistances, double-sensing head difference sampled voltage signal is just constituted.
Claims (4)
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, coaxial capacitance partial pressure in secondary conductor lateral wall
Device includes high voltage electric capacity and low-voltage capacity, and the coaxial capacitive voltage divider is provided with least two low-voltage capacitances,
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 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.
3. a kind of electronic current-voltage combination transformer according to claim 2, it is characterised in that：
It is close to be provided with the first metal layer in the secondary conductor lateral wall.
4. a kind of electronic current-voltage combination transformer according to claim 3, 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 |
|---|---|---|---|
| CN201510568289.1A CN106526275A (en) | 2015-09-09 | 2015-09-09 | Electronic current and voltage combined transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510568289.1A CN106526275A (en) | 2015-09-09 | 2015-09-09 | Electronic current and voltage combined transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106526275A true CN106526275A (en) | 2017-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510568289.1A Pending CN106526275A (en) | 2015-09-09 | 2015-09-09 | Electronic current and voltage combined transformer |
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| CN (1) | CN106526275A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441560A (en) * | 2019-09-17 | 2019-11-12 | 贵州电网有限责任公司 | A kind of anti-interference electronic mutual inductor acquisition device and method |
| CN111276315A (en) * | 2020-02-10 | 2020-06-12 | 华北电力大学 | Current-voltage transformer |
-
2015
- 2015-09-09 CN CN201510568289.1A patent/CN106526275A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110441560A (en) * | 2019-09-17 | 2019-11-12 | 贵州电网有限责任公司 | A kind of anti-interference electronic mutual inductor acquisition device and method |
| CN111276315A (en) * | 2020-02-10 | 2020-06-12 | 华北电力大学 | Current-voltage transformer |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170322 |
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| WD01 | Invention patent application deemed withdrawn after publication |