CN208889414U - A kind of VFTO inhibition device for GIS - Google Patents
A kind of VFTO inhibition device for GIS Download PDFInfo
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- CN208889414U CN208889414U CN201822015134.7U CN201822015134U CN208889414U CN 208889414 U CN208889414 U CN 208889414U CN 201822015134 U CN201822015134 U CN 201822015134U CN 208889414 U CN208889414 U CN 208889414U
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- ring
- zinc ferrite
- magnet ring
- ferrite magnet
- semi
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- 230000005764 inhibitory process Effects 0.000 title description 7
- 229910001053 Nickel-zinc ferrite Inorganic materials 0.000 claims abstract description 29
- 229910001289 Manganese-zinc ferrite Inorganic materials 0.000 claims abstract description 24
- JIYIUPFAJUGHNL-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[Mn++].[Mn++].[Mn++].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Fe+3].[Zn++].[Zn++] JIYIUPFAJUGHNL-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000004020 conductor Substances 0.000 claims abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 description 26
- 229910000859 α-Fe Inorganic materials 0.000 description 19
- 230000002401 inhibitory effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 8
- 239000011324 bead Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 238000009434 installation Methods 0.000 description 3
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000006854 communication Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Soft Magnetic Materials (AREA)
Abstract
The utility model relates to a kind of VFTO for GIS to inhibit device, belong to electromagnetic interference and inhibits field, including multiple nickel-zinc ferrite magnet rings and multiple manganese-zinc ferrite magnet rings, the nickel-zinc ferrite magnet ring and manganese-zinc ferrite magnet ring include mutually hinged the first semi-ring and the second semi-ring；Nickel-zinc ferrite magnet ring and manganese-zinc ferrite magnet ring intersection are stacked into combination magnet ring；It further include the more conductor pole supports of all nickel-zinc ferrite magnet rings and manganese-zinc ferrite magnet ring for being formed through combination magnet ring.It is additionally provided with conducting medium on the contact surface of each nickel-zinc ferrite magnet ring and manganese-zinc ferrite magnet ring, enhances the electric conductivity of entire combination magnet ring.The hinged end of first semi-ring and the second semi-ring is the concaveconvex structure that can cooperate, and further includes shaft bar, and the shaft bar passes through the concaveconvex structure of the first semi-ring and the second semi-ring, is formed hinged.The shaft bar of all nickel-zinc ferrite magnet rings and manganese-zinc ferrite magnet ring that form combination magnet ring is integrally formed.
Description
Technical field
The utility model belongs to electromagnetic interference and inhibits field, is related to a kind of VFTO inhibition device for GIS.
Background technique
During intelligent substation switching isolator operation, it will usually generate fast transient overvoltage (VFTO), lead to
It crosses Conduction coupling and radiation coupling causes biggish electromagnetic interference, especially conduct radiation to secondary device, when serious even
Damage secondary device.If can timely be inhibited in the conductive process of VFTO signal to it, it will be able to avoid this
High frequency transient electromagnetic interference signal causes to damage to the secondary device in electric system.Currently, the VFTO in electric system is main
It is the operation generation due to primary equipment, wherein be disconnecting switch operation in most cases, the voltage amplitude generated in this case
Value is big, frequency height, bandwidth, rise time are fast, is affected to the secondary device in electric system.
It is analyzed from electromagnetic interference three elements, electromagnetic interference is inhibited to be to inhibit the generation of interference source, propagate and to quick
Sense equipment carries out electromagnetic shielding measure.Mainly have to the suppressor mode of VFTO at present: installing opening and closing resistor, installing ferrite magnetic
Ring, installing metal oxide arrester, the disconnecting switch of quick acting and change operation sequence and simplified electrical wiring etc..This
A little measures have apparent inhibiting effect to VFTO, but there is also insufficient.
1) it installs opening and closing resistor: installing electricity in parallel additional in disconnecting switch, to consume the energy of VFTO, reduce the width of VFTO
Value and steepness accelerate the rate of decay of VFTO traveling wave.The practical inhibitory effect of this mode is very significant, but can to keep apart
Closing structure becomes complicated, and GIS device volume becomes larger, and increases cost.
2) ferrite bead: domestic electrical expert proposes the imagination for inhibiting VFTO using magnet ring earliest, has experiment to show iron
Oxysome to the inhibitory effect of VFTO clearly.But since currently used ferrite bead is mostly made using single material,
In using nickel-zinc ferrite magnet ring as representative, its resistivity is up to 10 in the high-frequency range of 1MHz or more8Ω m, high-frequency loss
Small, but in 1MHz low-frequency range below, nickel-zinc-ferrite material is less than MnZn ferrite material, and for VFTO from several
Hundred kHz have to several hundred MHz, the amplitude and steepness of the inhibition VFTO that simple a certain Ferrite Material can not be fully effective.
3) install metal oxide arrester: the model analysis for MOA under VFTO effect at present has carried out both at home and abroad
A large amount of experimental study, the results showed that although different models are not even entirely accurate under VFTO effect, MOA pairs
The inhibiting effect of VFTO is apparent.In view of the connection type of MOA general in GIS, it is equivalent to biggish electricity of having connected
Sense, so that the response time of MOA is generally in microsecond rank.Due to different arrangements and connection type, inhibition of the MOA to VFTO
It is still necessary to further study for the discussion of effect.
4) other: in recent years it has been proposed that using earthing switch release residual charge method reduce VFTO.Study table
It is bright, earthing switch movement can by the amplitude of VFTO reduce in 2pu hereinafter, still this method be only applicable to disconnecting switch last
After secondary arc process of restriking, for during repeatedly restriking arc, then having no idea to realize, therefore application range extremely has
Limit, when being generally used only in system short-circuit fault in the case where reclosing.Some scholars propose that changing operation operation sequence is reduced
The probability of VFTO and cancel high-pressure side disconnecting switch to reduce the idea that VFTO influences transformer, this to regard concrete condition and
It is fixed.
As described above, the safeguard procedures for having many scholars at present for VFTO in GIS have carried out a large amount of experimental study,
But generally studied with single safeguard procedures, for VFTO protection from system, consider difference
The mutual cooperation of safeguard procedures, thus the protection effect being optimal.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of VFTO for GIS to inhibit device, mainly by difference
The ferrite of material forms, this device can preferably inhibit VFTO in the propagation at disconnecting switch both ends.Ferrite is a kind of high
Frequency permeability magnetic material is equivalent to due to its high frequency characteristics and has concatenated an impedance between disconnecting switch fracture and unloaded bus, damped
The propagation of VFTO, its energy of decaying inhibit the amplitude and steepness of VFTO.
In order to achieve the above objectives, the utility model provides the following technical solutions:
A kind of VFTO inhibition device for GIS, including multiple nickel-zinc ferrite magnet rings and multiple manganese-zinc ferrite magnet rings,
The nickel-zinc ferrite magnet ring and manganese-zinc ferrite magnet ring include the first semi-ring and the second semi-ring, first semi-ring and second
One end of semi-ring is articulated and connected, and the other end cooperatively forms the annulus that can be opened and closed；The nickel-zinc ferrite magnet ring and manganese-zinc ferrite
Body magnet ring intersection is stacked into the combination magnet ring that can be opened and closed；It further include more conductor pole supports, the conductor pole support passes through shape
At all nickel-zinc ferrite magnet rings and manganese-zinc ferrite magnet ring of combination magnet ring.
Further, it is additionally provided with conducting medium on the contact surface of each nickel-zinc ferrite magnet ring and manganese-zinc ferrite magnet ring, increased
The electric conductivity of strong entire combination magnet ring.
Further, the hinged end of first semi-ring and the second semi-ring is the concaveconvex structure that can cooperate, and further includes shaft
Bar, the shaft bar pass through the concaveconvex structure of the first semi-ring and the second semi-ring, are formed hinged.
Further, formed combination magnet ring all nickel-zinc ferrite magnet rings and manganese-zinc ferrite magnet ring shaft bar one at
Type.
The utility model has the beneficial effects that:
(1) present apparatus structure it is simple, it is small in size, be easily installed disassembly, and cost of manufacture is cheap, due to empty inside GIS
Between it is limited, therefore the applicability of the present apparatus is very big.
(2) use of conductor rods strengthens the stabilization of magnet ring string, it is made to be not easy to be scattered, and substantially increases the use of magnet ring string
Service life；Simultaneously open-close ways user magnet ring string installation, maintenance, replacement.
(3) present apparatus uses two kinds of material matings, dexterously combines the different characteristics between material, has reached needs
Broadband inhibitory effect.
(4) according to different voltages grade needs, two kinds of the length and change of ferrite bead string can flexibly be changed
The distribution of material matches, to reach optimal inhibitory effect.
Detailed description of the invention
In order to keep the purpose of this utility model, technical scheme and beneficial effects clearer, the utility model provides as follows
Attached drawing is illustrated:
Fig. 1 is that the VFTO described in the utility model for GIS inhibits apparatus structure schematic diagram；
Fig. 2 is the installation schematic diagram that VFTO described in the utility model inhibits device；
Fig. 3 is the structural schematic diagram of combination magnet ring described in the utility model；
Fig. 4 is the working principle diagram of combination magnet ring described in the utility model；
Fig. 5 is the front schematic view of nickel-zinc ferrite magnet ring；
Fig. 6 is the first semi-ring and the second semi-loop schematic diagram.
Appended drawing reference: nickel-zinc ferrite magnet ring 1, manganese-zinc ferrite magnet ring 2, conductor pole support 3, folding crack 4, conductor are situated between
Matter 5, shaft bar 6, conductor bus 7, voltage transformer 8, GIS shell 9, disconnecting switch 10, the first semi-ring 11, the second semi-ring 12.
Specific embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
As shown in Figure 1, a kind of VFTO for GIS inhibits device, including multiple nickel-zinc ferrite magnet rings 1 and multiple MnZns
Ferrite bead 2, the nickel-zinc ferrite magnet ring 1 and manganese-zinc ferrite magnet ring 2 include the first semi-ring 11 and the second semi-ring 12,
The articulated connection of one end of first semi-ring 11 and the second semi-ring 12, the other end cooperatively form the annulus that can be opened and closed；The nickel
Zn ferrite magnet ring 1 and the intersection of manganese-zinc ferrite magnet ring 2 are stacked into the combination magnet ring that can be opened and closed；It further include more conductor rods branch
Column 3, the conductor pole support 3 are formed through all nickel-zinc ferrite magnet rings 1 and manganese-zinc ferrite magnet ring 2 of combination magnet ring.
Optionally, it is additionally provided with conducting medium on the contact surface of each nickel-zinc ferrite magnet ring 1 and manganese-zinc ferrite magnet ring 2,
The electric conductivity of the entire combination magnet ring of enhancing.
Optionally, as shown in Figure 5, Figure 6, the hinged end of first semi-ring 11 and the second semi-ring 12 is recessed for that can cooperate
Male structure further includes shaft bar 6, and the shaft bar 6 passes through the concaveconvex structure of the first semi-ring 11 and the second semi-ring 12, forms hinge
It connects, then the other end of the first semi-ring 11 and the second semi-ring 12 cooperatively forms folding crack 4.
Optionally, all nickel-zinc ferrite magnet rings 1 of combination magnet ring and the shaft bar 6 one of manganese-zinc ferrite magnet ring 2 are formed
It is body formed.
Working principle: it is illustrated in figure 2 the installation schematic diagram that VFTO inhibits device.It is mutual to be externally provided with voltage for GIS shell 9 in figure
Sensor 8 has conductor bus 7 in GIS shell 9, respectively installs the combination of certain length additional at the both ends of the disconnecting switch 10 of conductor bus 7
Magnetic ring device encounters ferrite bead in the communication process of VFTO, and can decay rapidly its energy, inhibits its amplitude, steep
Degree；
1) distribution situation of magnet ring material
It is illustrated in figure 3 the structural schematic diagram of combination magnet ring.The total length of magnet ring is l, the ferrite length of nickel zinc material
For θ l, ferrite length (1- θ) l of MnZn material, magnet ring outer radius is R, inside radius r, wherein 0 < θ < 1.Its total magnetic flux
Expression formula are as follows:
Wherein Bi=μ0μiH,μiThe initial permeability of corresponding nickel-zinc-ferrite material and MnZn ferrite material, arranges:
Above formula can be seen that magnet ring equivalent permeability made of two kinds of combinations of materials are as follows:
μd=θμ1+(1-θ)μ2 (2.3)
From formula (2.3) as can be seen that when θ takes different values, it is combined into the ferrite equivalent permeability difference come, thus
It can be according to equivalent permeability μdThe size of combination magnet ring string is further calculated, to effectively different voltages grade be inhibited to generate
VFTO interference signal.
2) equivalent model
Fig. 4 is the equivalent schematic diagram of device.Assuming that the initial permeability of two kinds of materials is μi, effective magnetic circuit length li, have
Imitate sectional area Ai(wherein i=1,2,1 indicates that nickel zinc material, 2 indicate MnZn material), when total magnetic flux passes through all sectional areas,
There is unit length equivalent inductance are as follows:
Resistance per unit length are as follows:
Wherein N is the number of turns, σ0For material electric conductivity.
By formula (2.4) (2.5) it is found that the value of the equivalent inductance of Ferrite Material is related with magnetic conductivity.Nickel-zinc ferrite
Initial permeability is low, and initial inductance is small, and in low frequency, and magnetic conductivity changes with frequency slowly, therefore, in low frequency inhibitory effect
Difference, but since its high frequency characteristics is good, the cutoff frequency of magnetic conductivity is very high, and in high frequency, magnetic conductivity is speeded with frequency variation, because
The variation of this equivalent inductance value also increases, and has good high-frequency suppressing effect；The initial permeability of manganese-zinc ferrite is high, equivalent first
Beginning inductance is big, and low frequency inhibitory effect is obvious, since magnetic conductivity is easy to reach saturation in high frequency for it, cause inductance value sharply under
Drop, therefore high-frequency suppressing effect almost disappears.The equivalent circuit that two kinds of materials combine in Fig. 4 is believed when wide band VFTO is interfered
When number passing through Ferrite Material, high-frequency interferencing signal is inhibited by nickel zinc material, and low-frequency interference signal is inhibited by MnZn material, reaches
A kind of wide band inhibitory effect.
3) inhibit principle
From figure 3, it can be seen that since the ferrite combination for using different materials forms, the inhibition frequency range of different materials
Different, when VFTO is propagated to both ends, the wideband that two kinds of combinations of materials are realized inhibits function, well intercepts VFTO,
Ferrite bead back warp crosses catadioptric back and forth, and the voltage traveling wave amplitude finally come out greatly reduces, and steepness reduces, and energy is almost
It is absorbed by magnet ring.
Finally, it is stated that preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, can make various changes, without departing from the utility model claims book institute to it in the form and details
The range of restriction.
Claims (4)
1. a kind of VFTO for GIS inhibits device, it is characterised in that: including multiple nickel-zinc ferrite magnet rings and multiple MnZn iron
Oxysome magnet ring, the nickel-zinc ferrite magnet ring and manganese-zinc ferrite magnet ring include the first semi-ring and the second semi-ring, and described first
The articulated connection of one end of semi-ring and the second semi-ring, the other end cooperatively form the annulus that can be opened and closed；The nickel-zinc ferrite magnet ring
The combination magnet ring that can be opened and closed is stacked into manganese-zinc ferrite magnet ring intersection；It further include more conductor pole supports, the conductor rods
Pillar is formed through all nickel-zinc ferrite magnet rings and manganese-zinc ferrite magnet ring of combination magnet ring.
2. the VFTO according to claim 1 for GIS inhibits device, it is characterised in that: each nickel-zinc ferrite magnet ring
Be additionally provided with conducting medium on the contact surface of manganese-zinc ferrite magnet ring, enhance the electric conductivity of entire combination magnet ring.
3. the VFTO according to claim 1 for GIS inhibits device, it is characterised in that: first semi-ring and second
The hinged end of semi-ring is the concaveconvex structure that can cooperate, and further includes shaft bar, and the shaft bar passes through the first semi-ring and the second half
The concaveconvex structure of ring is formed hinged.
4. the VFTO according to claim 1 for GIS inhibits device, it is characterised in that: form all of combination magnet ring
The shaft bar of nickel-zinc ferrite magnet ring and manganese-zinc ferrite magnet ring is integrally formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822015134.7U CN208889414U (en) | 2018-12-03 | 2018-12-03 | A kind of VFTO inhibition device for GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822015134.7U CN208889414U (en) | 2018-12-03 | 2018-12-03 | A kind of VFTO inhibition device for GIS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208889414U true CN208889414U (en) | 2019-05-21 |
Family
ID=66518836
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822015134.7U Active CN208889414U (en) | 2018-12-03 | 2018-12-03 | A kind of VFTO inhibition device for GIS |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208889414U (en) |
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2018
- 2018-12-03 CN CN201822015134.7U patent/CN208889414U/en active Active
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