CN107800123B - A kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor - Google Patents
A kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor Download PDFInfo
- Publication number
- CN107800123B CN107800123B CN201711117409.1A CN201711117409A CN107800123B CN 107800123 B CN107800123 B CN 107800123B CN 201711117409 A CN201711117409 A CN 201711117409A CN 107800123 B CN107800123 B CN 107800123B
- Authority
- CN
- China
- Prior art keywords
- temperature
- insulation
- paper
- low
- liquid nitrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/023—Current limitation using superconducting elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Containers, Films, And Cooling For Superconductive Devices (AREA)
Abstract
The embodiment of the invention provides a kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor.The device includes: outgoing line unit, superconduction resistance current limiting unit, low-temperature (low temperature) vessel, paper insulation and liquid nitrogen, two outgoing line units in center and connection that superconduction resistance current limiting unit is placed in inside device are drawn to outside device, low-temperature (low temperature) vessel is cylindrical structure, paper insulation is cylindrical structure, paper insulated outer diameter is identical as the internal diameter of low-temperature (low temperature) vessel, paper insulation is placed in the inside of low-temperature (low temperature) vessel, liquid nitrogen is placed between paper insulation and superconduction resistance current limiting unit, the composite insulation structure of liquid nitrogen and paper insulation composition, the common operating voltage and surge voltage for bearing high-temperature superconductor resistance-type current restrictor.The embodiment of the present invention can reduce the overall dimension of Main Insulation Structure of Electric device under the premise of meeting major insulation resistance to pressure request, reduce the equipment land occupation demand of superconductive current limiter, and improve the effective rate of utilization of liquid nitrogen.
Description
Technical field
The present invention relates to fault current limiter technical field more particularly to a kind of vertical high-temperature superconduction resistance-type current restrictors
Main Insulation Structure of Electric device and method.
Background technique
Resistor-type high tc superconducting fault current limiter is a kind of superconducting state using high-temperature superconductor-normal state fast transition characteristic
The novel fault current limit of work is equipped, and has fast response time, and it is small to operate normally loss, collection detection, triggering, current limliting and from
Dynamic function of restoring is the ideal current limiting technique of electric system and device development program, has broad prospects in integrated the features such as
With the huge market demand potential.
Resistive superconducting current limiter is limited using the superconduction resistance for the second generation hts band coiling commercially produced
Flow unit.Superconducting current-limiting unit is arranged in inside the low-temperature (low temperature) vessel equipped with liquid nitrogen.On the one hand liquid nitrogen is used as superconduction resistance current limliting list
The refrigeration working medium of member, to keep the superconducting state of superconductor；Another aspect liquid nitrogen is also used as the major insulation of superconductive current limiter, bears
The operating voltage and surge voltage of system.
Using liquid nitrogen as the insulating structure design of major insulation, in superconductive current limiter steady-state operation, performance is relatively stable.But
In superconductive current limiter current limliting transient process, there are failure of insulation risks.Be mainly reflected in: fault current causes superconduction resistance to limit
Stream unit quenches, and current limiting unit absorbs the energy of a large amount of fault currents, these energy pass in a short period of time to be superconducted
The liquid nitrogen around current limiting unit is hindered, causes liquid nitrogen vaporization, is finally discharged energy in the form of nitrogen.Since liquid nitrogen vaporization generates greatly
The nitrogen of amount, so that liquid nitrogen major insulation becomes gas-liquid two-phase insulation.The presence of bubble will cause electric field concentration of local, greatly
A possibility that improving shelf depreciation.During bubble motion, there is also being aligned is connected, this will provide logical for electric discharge
Road.
A kind of method of main insulation design is carried out using liquid nitrogen in the prior art are as follows: in order to ensure safety, according to nitrogen
Insulation standard is designed and there are surpluses.
It is above-mentioned in the prior art using liquid nitrogen carry out main insulation design the shortcomings that are as follows: although it is this with worst case be set out
The design of point can satisfy insulating requirements, but since surplus is stayed very big, cause the Dewar size of resistive superconducting current limiter very
Greatly, the utilization rate of liquid nitrogen is relatively low.
Summary of the invention
In order to solve the above-mentioned problems of the prior art, the embodiment provides a kind of vertical high-temperatures to superconduct
The Main Insulation Structure of Electric device and method of resistance type current limiter.
To achieve the goals above, this invention takes following technical solutions:
According to an aspect of the present invention, a kind of Main Insulation Structure of Electric dress of vertical high-temperature superconduction resistance-type current restrictor is provided
It sets characterized by comprising outgoing line unit, superconduction resistance current limiting unit, low-temperature (low temperature) vessel, paper insulation and liquid nitrogen, it is described to superconduct
Resistance current limiting unit is placed in the center inside device and connects two outgoing line units, and the outgoing line unit draws to outside device
Out, the paper insulation is placed in the inside of the low-temperature (low temperature) vessel, and the liquid nitrogen is placed in the paper insulation and the superconduction resistance current limliting
Between unit, the composite insulation structure of the liquid nitrogen and paper insulation composition is common to bear high-temperature superconductor resistance-type current restrictor
Operating voltage and surge voltage.
Preferably, the paper insulation and the low-temperature (low temperature) vessel carry out mechanical connection fixation, for preventing the paper insulation from existing
It is displaced in operation.
Preferably, the paper insulation is a kind of multilayer concentric structure being made of isolit, and paper insulation is generally round
Tubular construction.
Preferably, the gap between isolit described in adjacent layer carries out gluing as desired by impregnation method and fills out
Filling becomes an entity, or without filling retention gap.
Preferably, the paper insulated outer diameter is identical as the internal diameter of the low-temperature (low temperature) vessel.
Preferably, the isolit has good mechanical property at low temperature, at room temperature have it is good at
Shape characteristic；
The isolit selects cable paper, insulating board or PPLP.
Preferably, the low-temperature (low temperature) vessel is cylindrical structure, and the paper insulation is placed on the inside of the cylinder of the low-temperature (low temperature) vessel
Face, the cylinder top surface of the low-temperature (low temperature) vessel and bottom cylindrical face are with the liquid nitrogen at a distance of the nitrogen gas insulating distance of sufficient surplus.
According to another aspect of the present invention, a kind of major insulation method of vertical high-temperature superconduction resistance-type current restrictor is provided,
It is characterised by comprising:
It is preforming to paper insulation progress, multi-concentric cylindrical structure is formed with the isolit coiling, is obtained
To the molding paper insulation；
According to the design parameter of composite insulation structure, the paper insulation is mounted on to the inside of the low-temperature (low temperature) vessel, it is described
Paper insulation is close to the cylinder medial surface of the low-temperature (low temperature) vessel, and in paper insulated inside, filling liquid nitrogen obtains composite insulation structure；
The superconduction resistance current limiting unit is placed in the center inside the composite insulation structure, utilizes compound inslation
Structure bears the operating voltage and surge voltage of the superconduction resistance current limiting unit jointly.
Preferably, the paper insulation is mounted on the low temperature and held by the design parameter according to composite insulation structure
The inside of device, the paper insulation are close to the cylinder medial surface of the low-temperature (low temperature) vessel, and in paper insulated inside, filling liquid nitrogen is answered
Close insulation system, comprising:
The design parameter is that the partial pressure dielectric strength being subjected to by device determines that design parameter specifically includes: institute
State paper insulated thickness dPaper, the space length d of the liquid nitrogenLiquid nitrogen；
Using the composite insulation structure, the liquid nitrogen and the paper insulation bear operating voltage and surge voltage jointly,
In steady operation, electric field relationship are as follows:
EPaperdPaper+ELiquid nitrogendLiquid nitrogen=VMajor insulation voltage (1)
It is obtained from above formula:
ELiquid nitrogendLiquid nitrogen=VMajor insulation voltage-EPaperdPaper (2)
In above-mentioned two formula, according to VMajor insulation voltageValue be calculated: the paper insulated thickness dPaperWith the sky of the liquid nitrogen
Between length dLiquid nitrogen, and by increasing the paper insulated thickness dPaper, reduce the voltage value that the liquid nitrogen must endure as.
Preferably, the operating voltage and punching for bearing the superconduction resistance current limiting unit jointly using composite insulation structure
Hit voltage, comprising:
The radial major insulation electric field formed in the device, the paper insulation and institute by the low-temperature (low temperature) vessel cylindrical side
Liquid nitrogen is stated to bear jointly；
The major insulation electric field of the cylinder top surface of the low-temperature (low temperature) vessel and bottom cylindrical face in the device, is born by liquid nitrogen.
As can be seen from the technical scheme provided by the above-mentioned embodiment of the present invention, the embodiment of the invention provides a kind of vertical
The Main Insulation Structure of Electric device and method of high-temperature superconductor resistance-type current restrictor can under the premise of meeting major insulation resistance to pressure request
The block dimension for reducing superconductive current limiter reduces the equipment land occupation demand of superconductive current limiter, improves the effective rate of utilization of liquid nitrogen.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill of field, without any creative labor, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor provided in an embodiment of the present invention
Schematic diagram；
Fig. 2 is a kind of Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor provided in an embodiment of the present invention
Paper insulation structure composition schematic diagram；
Fig. 3 is a kind of production of the Main Insulation Structure of Electric of vertical high-temperature superconduction resistance-type current restrictor provided in an embodiment of the present invention
Method and step flow chart；
Wherein, 1- outgoing line unit, 2- superconduction resistance current limiting unit, 3- low-temperature (low temperature) vessel, 4- paper insulation, 5- liquid nitrogen, 41- paper are exhausted
Edge material, 42- paper insulation adjacent layer gap.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, it is done by taking several specific embodiments as an example below in conjunction with attached drawing further
Explanation, and each embodiment does not constitute the restriction to the embodiment of the present invention.
Embodiment one
In order to which the block dimension of superconductive current limiter can be reduced under the premise of meeting major insulation resistance to pressure request, reduce super
The equipment land occupation demand of current limiter is led, the embodiment of the present invention devises a kind of major insulation of vertical high-temperature superconduction resistance-type current restrictor
Constructional device and method.The insulation system device that the embodiment of the present invention is proposed is a kind of composite construction, the insulation in the device
Structure includes liquid nitrogen and isolit, forms multilayer concentric structure using isolit and liquid nitrogen is compound, can bear jointly
The operating voltage and surge voltage of high-temperature superconductor resistance-type current restrictor, and it is necessary by increasing paper insulated thickness reduction liquid nitrogen institute
The voltage value of receiving, so that the Main Insulation Structure of Electric device overall dimension reduces, improves to reduce the space length of liquid nitrogen
The effective rate of utilization of liquid nitrogen.
A kind of structure of the Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor provided in an embodiment of the present invention
Schematic diagram is as shown in Figure 1, the device includes: outgoing line unit 1, superconduction resistance current limiting unit 2, low-temperature (low temperature) vessel 3, paper insulation 4 and liquid
Nitrogen 5, low-temperature (low temperature) vessel 3 are cylindrical structure, and paper insulation 4 is columnar structured, outer diameter and the low-temperature (low temperature) vessel 3 of paper insulation 4
Internal diameter is identical；Superconduction resistance current limiting unit 2 is placed in the center inside device, and superconduction resistance current limiting unit 2 connects two and goes out
Line unit 1, two outgoing line units 1 are drawn to outside device, and paper insulation 4 is placed in the inside of low-temperature (low temperature) vessel 3, and liquid nitrogen 5 is placed in paper insulation 4
Between superconduction resistance current limiting unit 2.
Device provided in an embodiment of the present invention is a kind of major insulation knot that can be used for vertical high-temperature superconduction resistance-type current restrictor
Structure, the Main Insulation Structure of Electric are a kind of to carry out compound insulation system by liquid nitrogen and paper.
The concrete composition structure of device provided in an embodiment of the present invention is as follows:
(1) paper insulation
Paper insulation is a kind of multilayer concentric structure being made of isolit, and paper insulation is generally columnar structured.
A kind of paper of the Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor provided in an embodiment of the present invention is exhausted
Edge structure composition schematic diagram forms multilayer concentric as shown in Fig. 2, isolit is closely wound in a spiral form to given thickness
Structure, the given thickness are determined by the partial pressure dielectric strength designed；Have centainly between the adjacent layer of multilayer concentric structure
Gap, according to the needs of actual conditions, the gap between isolated from adjacent material can carry out gluing by impregnating mode and fill out
Filling becomes an entity, can also be without filling retention gap.
Wherein, isolit needs the condition met to have: having good mechanical property at low temperature, has at room temperature
There is good forming characteristic；Therefore, isolit can select cable paper, insulating board, PPLP (polypropylene layer platen) etc.
Material.
(2) composite insulation structure
Composite insulation structure includes: paper insulation and liquid nitrogen, and liquid nitrogen is placed in paper insulated inside.
Composite insulation structure is preforming to paper insulation progress in outside according to design parameter first, and design parameter is by device
What the partial pressure dielectric strength of design determined, design parameter specifically includes: paper insulated thickness dPaper, the space length d of liquid nitrogenLiquid nitrogen。
Paper insulation is carried out preforming being first to form multi-concentric cylindrical structure in external coiling with isolit to obtain
To molding paper insulation, and paper insulated outer diameter is matched with the internal diameter of low-temperature (low temperature) vessel, then integrally pacifies paper insulation
Liquid nitrogen is filled mounted in the inside of low-temperature (low temperature) vessel, and in paper insulated inside.
(3) Main Insulation Structure of Electric device
Main Insulation Structure of Electric device includes: composite insulation structure and low-temperature (low temperature) vessel, and composite insulation structure is placed in low-temperature (low temperature) vessel
Inside, low-temperature (low temperature) vessel are generally cylindrical.
Composite insulation structure is in vertical high-temperature superconduction resistor-type flow restrictor systems close on the inside of low-temperature (low temperature) vessel cylinder (i.e. zero
Current potential side) be arranged, and composite insulation structure and low-temperature (low temperature) vessel are subjected to being connected and fixed mechanically, with prevent it is compound absolutely
Paper insulation in edge structure is displaced in the process of running.
Composite insulation structure is placed in the cylinder medial surface of low-temperature (low temperature) vessel, this is mainly considered, and flow restrictor systems are integrated, group
The convenience of dress and the reliability of insulation.And the cylinder top and bottom of low-temperature (low temperature) vessel still use conventional method progress major insulation to set
Meter considers the nitrogen gas insulating distance of sufficient surplus.
Those skilled in the art will be understood that above-mentioned the lifted cylindrical low-temperature (low temperature) vessel according in superconductive current limiter system
And forming paper insulation coiling columnar structured is only the technical solution that the embodiment of the present invention is better described, rather than to the present invention
The restriction that embodiment is made.Any low-temperature (low temperature) vessel shape according in superconductive current limiter system determines the side of paper insulation shape
Method is all contained in the range of the embodiment of the present invention.
According to above-mentioned apparatus, vertical high-temperature superconductor resistance-type current restrictor carry out the method and step of major insulation as shown in figure 3,
It is specific as follows:
Step S310: it is preforming to paper insulation progress, multi-concentric cylindrical structure is formed with isolit coiling, is obtained
To molding paper insulation.
To paper insulation carry out it is preforming, i.e., be first closely wound in a spiral form with isolit to given thickness formed it is more
Layer concentric structure, obtains molding paper insulation；There is certain gap between the adjacent layer of multilayer concentric structure, according to reality
The needs of situation, the gap between isolated from adjacent material can carry out glued filling by impregnating mode becomes a reality
Body, can also be without filling retention gap；And paper insulated outer diameter is matched with the internal diameter of low-temperature (low temperature) vessel.
Step S320: according to the design parameter of composite insulation structure, the paper insulation of given thickness is mounted on low-temperature (low temperature) vessel
Inside, paper insulation be close to low-temperature (low temperature) vessel cylinder medial surface, paper insulated inside filling liquid nitrogen obtain composite insulation structure.
In the case where not using Main Insulation Structure of Electric device described in the embodiment of the present invention, liquid nitrogen undertakes as major insulation
Whole operating voltages and surge voltage.Especially in current limliting impact process, due to liquid nitrogen vaporization, failure of insulation risk compared with
Greatly.After Main Insulation Structure of Electric device described in the embodiment of the present invention, liquid nitrogen and paper insulation bear operating voltage and impact jointly
Voltage.In this way, electric field relationship when steady operation are as follows:
EPaperdPaper+ELiquid nitrogendLiquid nitrogen=VMajor insulation voltage (1)
Thus it is possible to obtain:
ELiquid nitrogendLiquid nitrogen=VMajor insulation voltage-EPaperdPaper (2)
The design parameter of composite insulation structure is the partial pressure insulation that should be born by device it can be seen from formula (1)
What intensity determined, design parameter specifically includes: paper insulated thickness dPaper, the space length d of liquid nitrogenLiquid nitrogen, according to VMajor insulation voltageIt can calculate
It obtains: paper insulated thickness dPaperWith the space length d of liquid nitrogenLiquid nitrogen。
As can be seen that the voltage that liquid nitrogen must endure as can be reduced by increasing paper insulated thickness from formula (2)
Value.Especially in current limliting impact process, although liquid nitrogen vaporization produces a large amount of bubbles, these bubbles are only distributed in liquid nitrogen sky
In.Due to paper insulated shielding action, these bubbles can't reduce the insulation performance of paper insulation part.
Step S330: being placed in the center inside the composite insulation structure for the superconduction resistance current limiting unit, benefit
Bear the operating voltage and surge voltage of the superconduction resistance current limiting unit jointly with composite insulation structure.
It insulate with the major insulation method of vertical high-temperature superconduction resistance-type current restrictor provided by the embodiment of the present invention
Structure design is born in radial major insulation electric field by the paper insulation and liquid nitrogen of close low-temperature (low temperature) vessel wall jointly；And low-temperature (low temperature) vessel
Cylinder top and bottom major insulation electric field still only have liquid nitrogen bear.
Furthermore, it is contemplated that the resistivity and relative dielectric constant of isolit will be greater than liquid nitrogen, using of the invention real
After applying composite insulation structure device described in example, liquid nitrogen space length d necessary to deviceLiquid nitrogenIt can be reduced, in other words,
The outer dimension that low-temperature (low temperature) vessel is reduced in the device that the embodiment of the present invention is proposed improves the effective rate of utilization of liquid nitrogen.
It is available with the major insulation method of vertical high-temperature superconduction resistance-type current restrictor provided by the embodiment of the present invention
Overall structure is simple, the uncomplicated Main Insulation Structure of Electric device of manufacture craft.
Embodiment two
This embodiment offers a kind of Main Insulation Structure of Electric devices of vertical high-temperature superconduction resistance-type current restrictor.
Fig. 1 is a kind of Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor provided in an embodiment of the present invention
Schematic diagram.Outgoing line unit is specifically included that using the superconductive current limiter system of compound Main Insulation Structure of Electric described in the embodiment of the present invention
1, superconduction resistance current limiting unit 2, low-temperature (low temperature) vessel 3, paper insulation 4 and liquid nitrogen 5.Paper insulation 4 be it is columnar structured, paper insulation 4 it is outer
The internal diameter of diameter size and low-temperature (low temperature) vessel 3 cooperates, and by paper insulation 4 after external coiling is formed, is installed on the inside of low-temperature (low temperature) vessel 3,
And fixation mechanically is carried out with the cylindrical side wall surface of low-temperature (low temperature) vessel 3, to prevent paper insulation 4 from running displacement occurs.
It is designed by the composite insulation structure of Fig. 1, it is exhausted by the paper close to low-temperature (low temperature) vessel side wall surface in radial major insulation electric field
Edge 3 and liquid nitrogen 5 are born jointly.And the major insulation electric field of warm container cylinder top and bottom still only has liquid nitrogen and bears.
Fig. 2 is a kind of Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor provided in an embodiment of the present invention
Paper insulated structure composition schematic diagram.The isolits such as cable paper, insulating board, PPLP 41 be closely wound in a spiral form to
Given thickness, the thickness are determined by the partial pressure dielectric strength designed.Gap 42 between isolated from adjacent material 41 can pass through
The filling of impregnating mode gluing, can also be not filled with.
In conclusion the embodiment of the present invention devises a kind of major insulation knot for vertical high-temperature superconduction resistance-type current restrictor
Structure device and method reduce the block dimension of superconductive current limiter under the premise of meeting major insulation resistance to pressure request, reduce superconduction limit
The equipment for flowing device takes up an area demand.The insulation system device of design of the embodiment of the present invention is a kind of composite construction, exhausted in the device
Edge structure includes liquid nitrogen and isolit, forms multilayer concentric structure using isolit and liquid nitrogen is compound, common to bear
The operating voltage and surge voltage of high-temperature superconductor resistance-type current restrictor, and it is necessary by increasing paper insulated thickness reduction liquid nitrogen institute
The voltage value of receiving, so that the Main Insulation Structure of Electric device overall dimension reduces, improves to reduce the space length of liquid nitrogen
The effective rate of utilization of liquid nitrogen.The structure of the embodiment of the present invention is simple, and manufacture craft is uncomplicated, high production efficiency, can satisfy big
The demand of batch production.
Those of ordinary skill in the art will appreciate that: attached drawing is the schematic diagram of one embodiment, module in attached drawing or
Process is not necessarily implemented necessary to the present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
It realizes by means of software and necessary general hardware platform.Based on this understanding, technical solution of the present invention essence
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes the certain of each embodiment or embodiment of the invention
Method described in part.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for device or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.Apparatus and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (9)
1. a kind of Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor characterized by comprising outgoing line unit,
Superconduction resistance current limiting unit, low-temperature (low temperature) vessel, paper insulation and liquid nitrogen, the superconduction resistance current limiting unit are placed in the center inside device
Position simultaneously connects two outgoing line units, and the outgoing line unit is drawn outward from the top of the low-temperature (low temperature) vessel, multilayer concentric
The paper insulation of structure is placed in the inside of the low-temperature (low temperature) vessel, and the liquid nitrogen is placed in the paper insulation and the superconduction resistance limits
It flows between unit, the composite insulation structure of the liquid nitrogen and paper insulation composition is common to bear high-temperature superconductor resistor-type current limliting
The operating voltage and surge voltage of device.
2. the Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor according to claim 1, which is characterized in that
The paper insulation and the low-temperature (low temperature) vessel carry out mechanical connection fixation, for preventing the paper insulation to be displaced in operation.
3. the Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor according to claim 2, which is characterized in that
The paper insulation is made of isolit, and paper insulation is generally columnar structured.
4. the Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor according to claim 1, which is characterized in that
Gap between isolit described in adjacent layer, carrying out glued filling as desired by impregnation method becomes an entity,
Or without filling retention gap.
5. the Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor according to claim 1, which is characterized in that
The paper insulated outer diameter is identical as the internal diameter of the low-temperature (low temperature) vessel.
6. the Main Insulation Structure of Electric device of vertical high-temperature superconduction resistance-type current restrictor according to claim 1, which is characterized in that
The low-temperature (low temperature) vessel is cylindrical structure, and the paper insulation is placed in the cylinder medial surface of the low-temperature (low temperature) vessel, the low-temperature (low temperature) vessel
Cylinder top surface and bottom cylindrical face and the liquid nitrogen at a distance of sufficient surplus nitrogen gas insulating distance.
7. a kind of design method of the major insulation of vertical high-temperature superconduction resistance-type current restrictor, based on any one of claim 1-6 institute
The device stated characterized by comprising
It is preforming to paper insulation progress, multi-concentric cylindrical structure is formed with the isolit coiling, is obtained into
The paper insulation of type；
According to the design parameter of composite insulation structure, the paper insulation is mounted on to the inside of the low-temperature (low temperature) vessel, the paper is exhausted
Edge is close to the cylinder medial surface of the low-temperature (low temperature) vessel, and in paper insulated inside, filling liquid nitrogen obtains composite insulation structure；
The superconduction resistance current limiting unit is placed in the center inside the composite insulation structure, utilizes composite insulation structure
The operating voltage and surge voltage of the superconduction resistance current limiting unit are born jointly.
8. the design method of the major insulation of vertical high-temperature superconduction resistance-type current restrictor according to claim 7, feature exist
In the paper insulation is mounted on the inside of the low-temperature (low temperature) vessel by the design parameter according to composite insulation structure, described
Paper insulation is close to the cylinder medial surface of the low-temperature (low temperature) vessel, and in paper insulated inside, filling liquid nitrogen obtains composite insulation structure, wraps
It includes:
The design parameter is that the partial pressure dielectric strength being subjected to by device determines that design parameter specifically includes: the paper
The thickness d of insulationPaper, the space length d of the liquid nitrogenLiquid nitrogen；
Using the composite insulation structure, the liquid nitrogen and the paper insulation bear operating voltage and surge voltage jointly, steady
When state works, electric field relationship are as follows:
EPaperdPaper+ELiquid nitrogendLiquid nitrogen=VMajor insulation voltage (1)
It is obtained from above formula:
ELiquid nitrogendLiquid nitrogen=VMajor insulation voltage-EPaperdPaper (2)
In above-mentioned two formula, according to VMajor insulation voltageValue be calculated: the paper insulated thickness dPaperIt is long with the space of the liquid nitrogen
Spend dLiquid nitrogen, and by increasing the paper insulated thickness dPaper, reduce the voltage value that the liquid nitrogen must endure as.
9. the design method of the major insulation of vertical high-temperature superconduction resistance-type current restrictor according to claim 7, feature exist
In the operating voltage and surge voltage for bearing the superconduction resistance current limiting unit jointly using composite insulation structure, comprising:
The radial major insulation electric field formed in the device, the paper insulation and the liquid by the low-temperature (low temperature) vessel cylindrical side
Nitrogen is born jointly；
The major insulation electric field of the cylinder top surface of the low-temperature (low temperature) vessel and bottom cylindrical face in the device, is born by liquid nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117409.1A CN107800123B (en) | 2017-11-13 | 2017-11-13 | A kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711117409.1A CN107800123B (en) | 2017-11-13 | 2017-11-13 | A kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107800123A CN107800123A (en) | 2018-03-13 |
| CN107800123B true CN107800123B (en) | 2019-11-15 |
Family
ID=61536048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711117409.1A Active CN107800123B (en) | 2017-11-13 | 2017-11-13 | A kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107800123B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649547B (en) * | 2018-03-28 | 2019-11-15 | 中国科学院电工研究所 | A kind of resistor-type high temperature superconducting malfunction current limiter |
| CN109818342B (en) * | 2019-03-18 | 2024-01-23 | 广东电网有限责任公司 | Superconducting current limiter with composite insulating structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003141946A (en) * | 2001-11-02 | 2003-05-16 | Sumitomo Electric Ind Ltd | Superconducting cable |
| CN101369481A (en) * | 2008-06-24 | 2009-02-18 | 保定天威集团有限公司 | Application of TIII sheet paper in oil-immersed type transformer as low-dielectric constant insulation material |
| WO2011142303A1 (en) * | 2010-05-10 | 2011-11-17 | 古河電気工業株式会社 | Superconducting cable |
| CN103345990B (en) * | 2013-06-16 | 2015-08-26 | 中国科学院电工研究所 | A kind of outlet casing tube being applied to high pressure superconducting power apparatus |
| CN106783027B (en) * | 2016-12-27 | 2018-04-10 | 中国科学院合肥物质科学研究院 | A kind of isolating transformer |
-
2017
- 2017-11-13 CN CN201711117409.1A patent/CN107800123B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107800123A (en) | 2018-03-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| van der Laan et al. | Characterization of a high-temperature superconducting conductor on round core cables in magnetic fields up to 20 T | |
| Marino et al. | Lightweight MgB2 superconducting 10 MW wind generator | |
| Pamidi et al. | High-temperature superconducting (HTS) power cables cooled by helium gas | |
| Xiang et al. | Short-circuit fault current-limiting characteristics of a resistive-type superconducting fault current limiter in DC grids | |
| CN107800123B (en) | A kind of Main Insulation Structure of Electric device and method of vertical high-temperature superconduction resistance-type current restrictor | |
| Hassenzahl | Superconducting magnetic energy storage | |
| Willering et al. | Effect of variations in terminal contact resistances on the current distribution in high-temperature superconducting cables | |
| Abrahamsen et al. | Large superconducting wind turbine generators | |
| Qiu et al. | Design and testing of a 10 kV/1 kA superconducting energy pipeline prototype for electric power and liquid natural gas transportation | |
| US8897845B2 (en) | Arrangement for electrically conductively connecting two electrical units | |
| CN104215355A (en) | System of online temperature monitoring for high-temperature superconducting tape | |
| US11363741B2 (en) | Systems and methods for cooling of superconducting power transmission lines | |
| Wang et al. | Study on the site selection for synchronous condenser responding to commutation failures of multi‐infeed HVDC system | |
| CN202650758U (en) | High-temperature superconductive mixed magnet for energy storage | |
| CN204303529U (en) | Photovoltaic power generation transformer loop construction | |
| Ueda et al. | R&D of HTS power cable and fault current limiter in Super-ACE project | |
| Cheetham et al. | Implementation of superconducting cables in medium voltage DC integrated power systems on all electric ships | |
| Adachi et al. | Design of 22-kV 10-kA HTS triaxial superconducting bus | |
| Vyas et al. | Superconducting magnetic energy storage (smes) | |
| Schoenung et al. | Cost savings and prospects for applications of micro superconducting magnetic energy storage (SMES) using high temperature superconductors | |
| Savoldi et al. | Thermal-hydraulic models for the cooling of HTS power-transmission cables: status and needs | |
| CN102568695A (en) | Superconducting cable system | |
| Kelley et al. | Application of HTS wire and cables to power transmission: State of the art and opportunities | |
| Noe et al. | Common characteristics and emerging test techniques for high temperature superconducting power equipment | |
| Ohsaki et al. | Development of SMES for power system control: present status and perspective |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |