CN106992510B - Inhibit the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear - Google Patents
Inhibit the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear Download PDFInfo
- Publication number
- CN106992510B CN106992510B CN201710378733.2A CN201710378733A CN106992510B CN 106992510 B CN106992510 B CN 106992510B CN 201710378733 A CN201710378733 A CN 201710378733A CN 106992510 B CN106992510 B CN 106992510B
- Authority
- CN
- China
- Prior art keywords
- magnet ring
- open loop
- air gap
- saturation
- loop anti
- 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
Images
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
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/02—Permanent magnets [PM]
- H01F7/0205—Magnetic circuits with PM in general
- H01F7/021—Construction of PM
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Soft Magnetic Materials (AREA)
Abstract
The present invention relates to a kind of magnetic ring devices of very fast transient overvoltage in inhibition gas-insulated switchgear, including magnet ring string, copper foil tape and fixing shell, magnet ring string is made of multiple open loop anti-saturation magnet rings, is closely connected between two neighboring open loop anti-saturation magnet ring by adhesive；Air gap is provided on open loop anti-saturation magnet ring；Fixing shell is set outside the outer surface package copper foil tape and magnet ring string of magnet ring string.The present invention can effectively improve the saturated characteristic of device, and cause more energy consumptions to traveling wave, reduce the VFTO value caused by disconnecting switch operation in GIS by opening up the air gap of suitable length on magnet ring；Copper foil tape can effectively prevent the magnetic line of force to reveal, and enhance the eddy-current loss of magnetic ring device, reduce influence of the VFTO to equipment, can also improve the field distribution in magnet ring string list face, avoid local field strength it is excessively high caused by partial discharge phenomenon.Fixing shell can be improved the strength and stiffness of magnetic ring device entirety.
Description
Technical field
The present invention relates to inhibit express speed in overvoltage technical field more particularly to a kind of inhibition gas-insulated switchgear
The magnetic ring device of transient overvoltage.
Background technique
In network system, accounted for since GIS (Gas Insulated Switchgear, gas-insulated switchgear) has
Ground area is small, high reliablity, safety is good, installation period is short and it is easy to maintain the advantages that so that GIS, which becomes, constitutes electricity at different levels
It the important component of net and is widely used in power grid.Opened from composed structure, GIS be by breaker, bus, every
Leave high voltage distribution installation made of pass, voltage transformer, current transformer, arrester and sleeve combination.When operation isolation is opened
Guan Shi can generate multiple arc reignition or prebreakdown between the fracture of disconnecting switch, and arc reignition each time can all generate centainly
The transient overvoltage of amplitude, transient overvoltage is transmitted along the fracture of disconnecting switch to two sides, by repeatedly reflecting and reflecting to form
The higher VFTO of amplitude (Very Fast Transient Overvoltage, very fast transient overvoltage), VFTO can serious prestige
GIS and GIS is coerced adjacent to one of the insulation safety of secondary device, the main reason for being GIS failure, therefore, is inhibiting overvoltage skill
Art field, it is an important problem that how research effectively inhibits VFTO in GIS.
There is a kind of magnetic ring device at present, which is closed loop configuration, mainly inhibits high-frequency electromagnetic dry using bead
The principle disturbed designs.Magnetic ring device is installed on conducting rod in GIS, is equivalent to increase equivalent resistance and inductance, change
The circuit parameter near conducting rod is become.Therefore, when generating VFTO in GIS, the amplitude and steepness of traveling wave also will be because of increases
Magnetic ring device and reduce.That is: current magnetic ring device inhibits VFTO by magnet ring equivalent resistance in high frequency and inductance
Steepness and amplitude, thus realize inhibiting VFTO in GIS.
However, if the current magnetic ring device of large-scale use, or current magnetic ring device is applied to super-pressure, spy
In the GIS of high pressure level, when disconnecting switch operation, under extreme conditions, the voltage value that isolation switch contact gap generates is about
For 2 times of power-frequency voltage amplitudes, therefore, the current peak flowed through in the conducting rod near disconnecting switch inside bus is also easy to reach
KA rank.Since current magnetic ring device uses closed loop configuration, by Ampere circuit law it is found that when the current value for flowing through conducting rod
When I is very big, it is also very big to incude the magnetic field strength H of formation on closed loop magnet ring, in conjunction with B-H loop it is found that magnetic field strength H very
When big, magnet ring is easily accessible saturation state；Finally, by the relationship of magnetic flux density, magnetic field strength and magnetic conductivity it is found that working as magnet ring
When the magnetic field strength H that upper induction is formed is very big, the magnetic conductivity of magnet ring is close to 0, at this point, under equivalent inductance and impedance are all significant
Drop, causes the inhibiting effect of magnet ring also obviously to fail.Therefore, current magnetic ring device is due to using closed loop configuration, so that magnetic
Loop device is easily saturated, large-scale use magnet ring or by magnet ring be applied to super-pressure, extra-high voltage grade GIS in when, at present
Magnetic ring device can not effectively inhibit VFTO.
Summary of the invention
To overcome the problems in correlation technique, the present invention provides express speed in a kind of inhibition gas-insulated switchgear
The magnetic ring device of transient overvoltage.
The magnetic ring device of very fast transient overvoltage in a kind of inhibition gas-insulated switchgear, including magnet ring string, copper foil
Adhesive tape and fixing shell, in which: magnet ring string is set on the conducting rod inside GIS, and is fitted closely with conducting rod, magnet ring string by
Multiple open loop anti-saturation magnet rings are constituted, and the central axes of multiple open loop anti-saturation magnet rings are overlapped and closely connect along axial, adjacent two
It is closely connected between a open loop anti-saturation magnet ring by adhesive；The identical gas of length is provided on multiple open loop anti-saturation magnet rings
Gap；Copper foil tape is wrapped up in the outer surface of magnet ring string, is enclosed with outside the magnet ring string of copper foil tape and fixing shell is arranged.
Optionally, insulating oil cardboard, and insulating oil cardboard and gas are closely embedded at the air gap of single open loop anti-saturation magnet ring
It is closely connected between gap by adhesive；
Two sides of the insulating oil cardboard contacted with air gap are matched with air gap, the thickness of insulating oil cardboard and the length of air gap
Degree matching.
Optionally, the length of air gap is 1mm-2mm.
Optionally, adhesive is set as modified epoxide resin adhesive.
Optionally, fixing shell is set as aluminum hull.
Optionally, open loop anti-saturation magnet ring is set as ferrite soft magnetic open loop anti-saturation magnet ring.
Optionally, the cut-out direction of the air gap of multiple open loop anti-saturation magnet rings is consistent.
Optionally, the sectional area of fixing shell is identical as the sectional area of single open loop anti-saturation magnet ring.
The technical solution that the embodiment of the present invention provides can include the following benefits:
The present invention provides a kind of magnetic ring device for inhibiting very fast transient overvoltage in gas-insulated switchgear, including magnetic
Ring string, copper foil tape and fixing shell, in which: magnet ring string is set on the conducting rod inside GIS, and is closely pasted with conducting rod
It closes, magnet ring string is made of multiple open loop anti-saturation magnet rings, and the central axes of multiple open loop anti-saturation magnet rings are overlapped and along axial close
It connects, is closely connected between two neighboring open loop anti-saturation magnet ring by adhesive；It is provided on multiple open loop anti-saturation magnet rings
The identical air gap of length；Copper foil tape is wrapped up in the outer surface of magnet ring string, is enclosed with outside the magnet ring string of copper foil tape and is arranged outside fixed
Shell.
Magnet ring is designed as open loop structure, operated in GIS by the present invention by opening up the air gap of suitable length on magnet ring
When disconnecting switch, even if the voltage value that isolation switch contact gap generates is very big, the electric current for flowing through conducting rod will not be too big,
The magnetic field strength for incuding formation on magnet ring is caused to greatly reduce, therefore, magnet ring is not easily accessed saturation state, that is to say, that this hair
The setting of bright middle open loop anti-saturation magnet ring, can effectively improve the saturated characteristic of magnetic ring device entirety.In addition, in the feelings of transient state
Under condition, due to being provided with air gap in magnetic ring device, air gap can cause more energy consumptions to traveling wave, to reduce traveling wave
Amplitude, and then reduce the VFTO value caused by disconnecting switch operation in GIS, that is to say, that the setting of air gap in magnetic ring device,
VFTO value can also effectively be inhibited.In addition, the copper foil tape in the present invention can be effectively prevented magnetic line of force leakage, to enhance
The eddy-current loss of magnetic ring device reduces influence of the VFTO to equipment, moreover, the setting of copper foil tape can also improve magnet ring string list
The field distribution in face, thus magnet ring string list face avoid local field strength it is excessively high caused by partial discharge phenomenon.Fixing shell is set
The strength and stiffness that can be improved magnetic ring device entirety are set, avoiding device is collided with and damaged during carrying.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
It can the limitation present invention.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without creative efforts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of magnetic for inhibiting very fast transient overvoltage in gas-insulated switchgear provided in an embodiment of the present invention
The structural schematic diagram of loop device；
Fig. 2 is very fast transient overvoltage in another inhibition gas-insulated switchgear provided in an embodiment of the present invention
The structural schematic diagram of magnetic ring device.
Symbol in Fig. 1 and Fig. 2 indicates:
1- open loop anti-saturation magnet ring, 2- fixing shell, 3- copper foil tape, 4- adhesive, 5- insulating oil cardboard.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of device and method being described in detail in claims, some aspects of the invention are consistent.
Gas-insulated switchgear GIS is common electrical equipment in power grid, super-pressure, extra-high voltage grade GIS in
When disconnecting switch operation, isolation switch contact gap can generate a kind of very fast transient overvoltage VFTO, and VFTO, which will lead to, to be flowed through
Current peak in conducting rod reaches kA rank.By taking the GIS device of 550kV as an example, the wave impedance model of China's 550kV GIS device
Substantially 70~100 Ω are enclosed, in folding, the reflection process for not considering traveling wave, are likely to occur by isolation switch contact gap
2 times of power frequency supply crest voltages estimation, generate VFTO when travelling wave current in 4.49kA or more.Therefore VFTO is seriously threatened
Secondary device in GIS simultaneously causes GIS failure, and in order to effectively inhibit VFTO, the present invention provides a kind of inhibition gas-insulated and opens
Close the magnetic ring device of very fast transient overvoltage in equipment.
Below with reference to attached drawing to very fast transient overvoltage in the inhibition gas-insulated switchgear of the embodiment of the present invention
Magnetic ring device be described in detail.
Embodiment one
It is very fast transient mistake in a kind of inhibition gas-insulated switchgear provided in an embodiment of the present invention referring to Fig. 1, Fig. 1
The structural schematic diagram of the magnetic ring device of voltage.As shown in Figure 1, the invention mainly comprises three parts: magnet ring string, copper foil tape 3
And fixing shell 2.Wherein, magnet ring string is set on the conducting rod in GIS median generatrix, and magnet ring string is closely pasted with conducting rod
It closes.Magnet ring string is made of multiple open loop anti-saturation magnet rings 1, and the central axes of multiple open loop anti-saturation magnet rings 1 are overlapped and along axial tight
Close connection is closely connected by adhesive 4 between two neighboring open loop anti-saturation magnet ring 1；It is set on multiple open loop anti-saturation magnet rings 1
It is equipped with the identical air gap of length.
Magnetic ring device is installed on GIS inner conductive bar, i.e., circuit is filtered, no matter magnetic ring device is open loop magnet ring
Or closed loop magnet ring, is all equivalent to and increases equivalent resistance and inductance to conducting rod, therefore can change the circuit near conducting rod
Parameter.In this case, when generating VFTO in GIS, the amplitude and steepness of traveling wave will be dropped because magnetic ring device is increased
It is low.It is both provided with an air gap on each open loop anti-saturation magnet ring 1 in the embodiment of the present invention, therefore open loop anti-saturation magnet ring
Cross sectional shape is similar to an annular jaggy.The present invention is designed magnet ring by opening up the air gap of suitable length on magnet ring
For open loop structure, in GIS when disconnecting switch operation, even if the voltage value that isolation switch contact gap generates is very big, due to
Magnet ring is not closed loop configuration, and the electric current for flowing through conducting rod will not be too big, therefore the magnetic field strength of formation is incuded on magnet ring significantly
Reduce, magnet ring is not easily accessed saturation state, this is equivalent to the saturated characteristic for improving magnetic ring device entirety.Moreover, temporary
In the case where state, due to the presence of air gap, energy consumptions more more than closed loop magnet ring can be caused to traveling wave, so can result in row
The amplitude and steepness of wave further decrease.Therefore, the present invention can effectively improve the saturated characteristic of magnetic ring device, and can show
Write the inhibitory effect improved to VFTO.
In the embodiment of the present invention, in open loop anti-saturation magnet ring 1 length of air gap be 1mm-2mm, optimal selection 1.5mm,
This size requirement of open loop anti-saturation magnet ring, can either improve the saturated characteristic of entire magnetic ring device, and will not influence magnet ring
Other performances.
The identical air gap of length is provided on multiple open loop anti-saturation magnet rings 1, and multiple open loop anti-saturation magnet rings constitute one
A magnet ring string is set on conducting rod.It is in multiple open loop anti-saturation 1 axially close-packed arrays of magnet ring, multiple open loops are anti-full
It is consistent with the cut-out direction of magnet ring, is conducive to the stability for improving magnetic ring device entirety.
Further, in multiple open loop anti-saturation 1 axially close-packed arrays of magnet ring, the notch side of air gap can be enabled
To unanimously vertically downward, when due to execute-in-place, the arm of operator needs to go deep into pipeline, gas in open loop anti-saturation magnet ring is enabled
The cut-out direction of gap is unanimously conducive to operator vertically downward and easily unifies arrangement magnet ring, to further ensure that device
Stability.
With continued reference to Fig. 1, in the embodiment of the present invention, the copper foil tape 3 is wrapped up in the outer surface of magnet ring string, is enclosed with copper foil
Fixing shell 2 is provided with outside the magnet ring string of adhesive tape 3.Copper foil tape 3 is wrapped in around magnet ring string by included viscose glue, can be with
It effectively prevent the magnetic line of force to reveal, reinforces the eddy-current loss of magnetic ring device, to cause more energy consumptions to traveling wave, be conducive to
The amplitude of traveling wave is reduced, influence of the VFTO to GIS and other secondary devices is reduced.Moreover, copper foil tape can also improve magnetic
The field distribution in ring string list face avoids magnet ring string list face from generating shelf depreciation since local field strength is excessively high.
In terms of the apparent size of fixing shell 2, the sectional area of the sectional area of fixing shell 2 and single open loop anti-saturation magnet ring
Identical, the length of fixing shell 2 can be depending on the quantity of open loop anti-saturation magnet ring in practical magnetic ring device.This structure is set
Meter, it can be ensured that fixing shell 2 and the magnet ring string for being enclosed with copper foil tape 3 fit closely together, are conducive to improve magnet ring dress
The stability set.
By Fig. 1 it can also be seen that closely being connected between two neighboring open loop anti-saturation magnet ring 1 by adhesive 4.Pass through glue
Stick 4 will closely connect between two neighboring open loop anti-saturation magnet ring 1, it can be ensured that the fastness of magnet ring string avoids list
Loosening is generated between a open loop anti-saturation magnet ring, to improve entire magnetic ring device to the inhibitory effect of VFTO.
Specifically, the adhesive 4 in the embodiment of the present invention can use modified epoxide resin adhesive, modified epoxy
Adhesive is modified processing to epoxy resin using polyurethane prepolymer, can overcome the brittleness of general epoxyn
The poor disadvantage with heat-resisting quantity, and there are the good characteristics such as oil resistant, water-fast and organic solvent-resistant, it is accordingly possible to ensure opening
Connection between ring anti-saturation magnet ring is even closer and secured.
Embodiment two
On the basis of above-mentioned embodiment shown in FIG. 1 referring to fig. 2, Fig. 2 is another kind provided in an embodiment of the present invention
Inhibit the structural schematic diagram of the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear.As shown in Figure 2, of the invention
Closely be embedded in insulating oil cardboard 5 in embodiment at the air gap of single open loop anti-saturation magnet ring 1, and insulating oil cardboard 5 and air gap it
Between by adhesive 4 closely connect.Two sides of the insulating oil cardboard 5 contacted with air gap are matched with air gap, insulating oil cardboard 5
Thickness matched with the length of air gap.
Insulating oil cardboard 5 is a kind of non-magnet material, and the sky in magnetic field will not be both influenced to magnetic field generation beam magnetic action
Between distribution will not reduce the saturated characteristic of open loop anti-saturation magnet ring 1 again.In the gas of open loop anti-saturation magnet ring 1 in the embodiment of the present invention
It is closely embedded in insulating oil cardboard 5 at gap, the shelf depreciation of air gap surface can be effectively prevent, to improve entire magnetic ring device
Safety.The part that the embodiment is not described in detail can refer to embodiment shown in FIG. 1, between the two can mutual reference,
This is no longer elaborated.
In addition, the open loop anti-saturation magnet ring 1 in present invention implementation can choose ferrite soft magnetic open loop anti-saturation magnet ring, iron
Oxysome soft magnetism open loop anti-saturation magnet ring is a kind of magnet ring that air gap is opened made of soft magnetic materials, and this magnet ring does not need to be grounded,
No particular/special requirement is designed to its structure, therefore is suitble to promote the use of, and the loss of this magnet ring medium-high frequency is low, as common mode
Choke coil is more obvious particularly with its advantage for the conducting wire of transmission high-frequency signal in use, not will cause distorted signals.
By taking 550kV GIS as an example, when carrying out structure design for the magnetic ring device in the present invention, following ruler can be referred to
It is very little: since magnet ring string is set on the conducting rod in GIS, it is contemplated that the size of magnet ring string needs and conducting rod in existing GIS
Outer diameter parameters match, the outer diameter of single open loop anti-saturation magnet ring 1 can be set to 210mm-250mm, internal diameter 150mm-
200mm, with a thickness of 15mm-35mm, wherein the optimum size selection of single open loop anti-saturation magnet ring 1 are as follows: outer diameter 230mm, internal diameter
170mm, thickness 20mm.The length of air gap is 1mm-2mm in single open loop anti-saturation magnet ring, and best gas length is 1.5mm.Gu
Determining shell 2 can choose aluminum hull, it is assumed that magnet ring string includes 20 magnet rings altogether, and entire aluminum hull is cylindrical, be may be sized to:
The floor space of outer diameter 240mm, internal diameter 230mm, thickness 400mm, aluminum hull both ends base area and single open loop anti-saturation magnet ring 1 is protected
It holds consistent.
Those skilled in the art will readily occur to of the invention its after considering specification and the disclosure invented here of practice
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (7)
1. a kind of magnetic ring device for inhibiting very fast transient overvoltage in gas-insulated switchgear, which is characterized in that including magnetic
Ring string, copper foil tape (3) and fixing shell (2), in which:
The magnet ring string is set on the conducting rod inside GIS, and is fitted closely with the conducting rod, and the magnet ring string is by multiple
Open loop anti-saturation magnet ring (1) is constituted, and the central axes of multiple open loop anti-saturation magnet rings (1) are overlapped and closely connect along axial,
It is closely connected between the two neighboring open loop anti-saturation magnet ring (1) by adhesive (4)；Multiple open loop anti-saturation magnet rings
(1) the identical air gap of length is provided on；
The copper foil tape (3) is wrapped up in the outer surface of the magnet ring string, is enclosed with outside the magnet ring string of the copper foil tape (3)
The fixing shell (2) are set；
It is closely embedded in insulating oil cardboard (5) at the air gap of the single open loop anti-saturation magnet ring (1), and the insulating oil cardboard
(5) it is closely connect between the air gap by the adhesive (4)；
Two sides of the insulating oil cardboard (5) contacted with the air gap are matched with the air gap, the insulating oil cardboard
(5) thickness is matched with the length of the air gap.
2. magnetic ring device according to claim 1, which is characterized in that the length of the air gap is 1mm-2mm.
3. magnetic ring device according to claim 1, which is characterized in that the adhesive (4) is set as modified epoxy
Adhesive.
4. magnetic ring device according to claim 1, which is characterized in that the fixing shell (2) is set as aluminum hull.
5. magnetic ring device according to claim 1, which is characterized in that the open loop anti-saturation magnet ring (1) is set as iron oxygen
Body soft magnetism open loop anti-saturation magnet ring.
6. magnetic ring device according to claim 1, which is characterized in that the air gap of multiple open loop anti-saturation magnet rings is cut
Mouth direction is consistent.
7. magnetic ring device according to claim 1, which is characterized in that the sectional area of the fixing shell (2) and single institute
The sectional area for stating open loop anti-saturation magnet ring is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710378733.2A CN106992510B (en) | 2017-05-25 | 2017-05-25 | Inhibit the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710378733.2A CN106992510B (en) | 2017-05-25 | 2017-05-25 | Inhibit the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106992510A CN106992510A (en) | 2017-07-28 |
| CN106992510B true CN106992510B (en) | 2019-10-15 |
Family
ID=59421191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710378733.2A Active CN106992510B (en) | 2017-05-25 | 2017-05-25 | Inhibit the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106992510B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108872699A (en) * | 2018-07-11 | 2018-11-23 | 云南电网有限责任公司电力科学研究院 | A kind of VFTO on-line data acquisition device |
| CN109888757A (en) * | 2019-01-23 | 2019-06-14 | 平高集团有限公司 | VFTO inhibits device and GIS device |
| CN113408232B (en) * | 2021-06-18 | 2023-09-19 | 国网陕西省电力公司电力科学研究院 | Magnetic ring power frequency saturation characteristic simulation method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258923A (en) * | 2000-01-25 | 2000-07-05 | 清华大学 | Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance |
| CN201975776U (en) * | 2011-01-12 | 2011-09-14 | 福建省电力有限公司电力科学研究院 | Device capable of reducing steepness of lightning intruding wave onto transformer |
| CN102945733A (en) * | 2012-11-27 | 2013-02-27 | 中国船舶重工集团公司第七一二研究所 | Anti-saturation magnet ring |
| CN103236684A (en) * | 2013-04-17 | 2013-08-07 | 清华大学 | High-frequency magnet ring device for restraining very fast transient overvoltage |
| EP2747094A1 (en) * | 2012-12-21 | 2014-06-25 | ABB Technology AG | Very fast transient overvoltage attenuator |
| CN105305398A (en) * | 2015-11-27 | 2016-02-03 | 云南电网有限责任公司电力科学研究院 | Ultra-high-voltage GIS rapid transient overvoltage suppression system |
| CN106505457A (en) * | 2016-11-21 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of nanocrystalline magnetic loop device |
| CN206947941U (en) * | 2017-05-25 | 2018-01-30 | 云南电网有限责任公司电力科学研究院 | Suppress the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
-
2017
- 2017-05-25 CN CN201710378733.2A patent/CN106992510B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1258923A (en) * | 2000-01-25 | 2000-07-05 | 清华大学 | Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance |
| CN201975776U (en) * | 2011-01-12 | 2011-09-14 | 福建省电力有限公司电力科学研究院 | Device capable of reducing steepness of lightning intruding wave onto transformer |
| CN102945733A (en) * | 2012-11-27 | 2013-02-27 | 中国船舶重工集团公司第七一二研究所 | Anti-saturation magnet ring |
| EP2747094A1 (en) * | 2012-12-21 | 2014-06-25 | ABB Technology AG | Very fast transient overvoltage attenuator |
| CN103236684A (en) * | 2013-04-17 | 2013-08-07 | 清华大学 | High-frequency magnet ring device for restraining very fast transient overvoltage |
| CN105305398A (en) * | 2015-11-27 | 2016-02-03 | 云南电网有限责任公司电力科学研究院 | Ultra-high-voltage GIS rapid transient overvoltage suppression system |
| CN106505457A (en) * | 2016-11-21 | 2017-03-15 | 云南电网有限责任公司电力科学研究院 | A kind of nanocrystalline magnetic loop device |
| CN206947941U (en) * | 2017-05-25 | 2018-01-30 | 云南电网有限责任公司电力科学研究院 | Suppress the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106992510A (en) | 2017-07-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106992510B (en) | Inhibit the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear | |
| CN106486991B (en) | It is a kind of for inhibiting the damping bus of VFTO | |
| CN103236684B (en) | Suppress the high-frequency magnetic device of very fast transient overvoltage | |
| CN107589356A (en) | Transformer insulated property detection means | |
| CN1258923A (en) | Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance | |
| CN110118906A (en) | A kind of method of determining VFTO to secondary device influence degree | |
| CN206947941U (en) | Suppress the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear | |
| CN106505457B (en) | A kind of nanocrystalline magnetic loop device | |
| CN108923342A (en) | A kind of GIS outlet casing tube with damping function | |
| CN208862563U (en) | Fast transient overvoltage based on the parallel connection of resistance-inductance side by side inhibits device | |
| CN109448965A (en) | High frequency high voltage transformer | |
| CN105514898B (en) | A kind of magnet ring optimum organization method inhibiting electromagnetic scattering | |
| CN105097252A (en) | Isolation transformer capable of suppressing power interference for partial discharge test of dry-type transformer | |
| CN206195229U (en) | Nanocrystalline magnetic ring device | |
| CN205280858U (en) | Leakage current sensor for power equipment | |
| CN207558550U (en) | A kind of isolating transformer | |
| CN205984597U (en) | Ultrahigh voltage transformer's insulation system | |
| Boniface et al. | Impedance behavioural study of silicon steel laminated core inductor | |
| CN103956215A (en) | Shielding cable | |
| CN107545997A (en) | A kind of isolating transformer device body | |
| CN205452013U (en) | Flame -proof type multivoltage unsteady flow is dry -type transformer and mobile substation for mobile substation | |
| CN104485207B (en) | Conjugation-type outer iron core reactor | |
| US1856122A (en) | Electrostatic coupling | |
| CN108878098A (en) | A kind of high overload energy-efficient distribution transformer of pair side Multiple coil mixing connection | |
| CN208889414U (en) | A kind of VFTO inhibition device for GIS |
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 |