CN109888740A - A kind of VFTO inhibits device and GIS device - Google Patents
A kind of VFTO inhibits device and GIS device Download PDFInfo
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- CN109888740A CN109888740A CN201910082882.3A CN201910082882A CN109888740A CN 109888740 A CN109888740 A CN 109888740A CN 201910082882 A CN201910082882 A CN 201910082882A CN 109888740 A CN109888740 A CN 109888740A
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- conducting rod
- vfto
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Abstract
The present invention relates to electrical equipment technical fields, specifically provide a kind of GIS device that VFTO inhibits device and the VFTO is used to inhibit device.It includes conducting rod that VFTO, which inhibits device, magnet ring string group is arranged on the outer peripheral surface of the conducting rod, resistance cylinder is arranged on the outer peripheral surface of the magnet ring string group, the both ends of the resistance cylinder are respectively arranged with the extension for exceeding magnet ring string group on conducting rod length direction, annular space is formed between the extension and conducting rod, be equipped with jackscrew resistance cylinder being fixed on conducting rod on the extension, the jackscrew, which has, to be contacted across annular space with conducting rod to realize that resistance cylinder is connected with conducting rod, and the jackscrew is made of an electrically conducting material.VFTO in the present invention inhibits device to be able to solve the problem of conducting rod and resistance processing, assembly complexity in the prior art.
Description
Technical field
The present invention relates to electrical equipment technical fields, and in particular to a kind of VFTO inhibits device and GIS device.
Background technique
Each time operation of the disconnecting switch in Cubicle Gas-Insulated Switchgear (GIS) all occurs tens of times even
Hundreds of re-ignition, the voltage at contact gap both ends fall suddenly in several ns, and voltage steep wave constantly generates row in GIS
Complicated refraction, reflection and superposition occur for wave, generate very fast transient overvoltage (calling VFTO in the following text).VFTO is a kind of special
Overvoltage, main there are three features: first is that bandwidth (from zero to MHz up to a hundred)；Second is that steepness is big, (rise time can be down to number
ns)；Third is that amplitude is high (up to 3p.u.).
VFTO has a major impact the safe operation of GIS device, external connection apparatus and secondary device, and with system
The raising of voltage class, this influence is more and more significant, especially prominent in extra-high voltage system.Therefore, for electric system
Safe and stable operation, it is necessary to responsible measures be taken to inhibit the VFTO in extra-high voltage GIS.
In the prior art, ferrite bead can effectively inhibit VFTO, and it is to solve that high-frequency magnetic is installed in the circuit GIS
An economy, the reliable method of VFTO problem.But the magnetic conductivity of high-frequency magnetic changes with the variation of magnetic field strength,
When Ferrite Material tends to saturation, incremental permeability goes to zero.That is, at saturation condition, ferrite high-frequency magnetic inhibits
The effect of VFTO will disappear.In GIS in practical projects, the travelling wave current of VFTO can reach kilo-ampere, so big
Travelling wave current under, will lead to magnet ring and be seriously saturated, lose inhibit traveling wave steepness and amplitude ability, it is therefore desirable to take effectively
Measure avoids magnet ring from being seriously saturated, and guarantees the reliability that VFTO inhibits.
Increasing magnet ring dosage energy partial offset saturation influences, but is based on following reason, the magnetic installed in Practical Project
Number of rings amount can not be infinitely more: first is that increasing magnet ring quantity will increase equipment cost, second is that GIS compact structure limits magnet ring
Installation number, therefore, be excessively increased magnet ring quantity be not solve magnet ring saturation problem good method.
The maximum restraining factors of magnet ring inhibition VFTO are the influences of saturation effect.Ferrite bead can Approximate Equivalent at non-thread
The electrical component of property inductance and resistor coupled in parallel.When VFTO is generated, nonlinear inductance reduces the steepness of traveling wave, and resistance reduces traveling wave
Amplitude.
With the raising of travelling wave current, the magnetic conductivity of magnetic material will tend to be saturated, and magnetic conductivity reduces, the equivalent electricity of magnet ring
Sense will reduce, and will weaken to the inhibiting effect of VFTO.For saturated characteristic, Langevin functional simulation magnetic material can be used
Static magnetization curve:
Wherein, MsIt is saturation magnetization, μ0It is space permeability, μiIt is starting relative permeability.Vortex characteristic, electricity consumption
Resistance rate ρ characterization.Such as the ferrite bead of model R2KB, saturation magnetization 0.5T, initial permeability 2500, electricity
Resistance rate is 0.03 Ω m, it is assumed that magnet ring thickness 15mm, internal diameter 120mm, outer diameter 160mm.
It is estimated by taking this ferrite bead as an example, under DC case, 100A electric current is passed through in the conducting rod of GIS i.e.
Reach critical saturation；Under transient current, due to the demagnetizing effect of vortex, electric current needed for reaching saturation can be increased.
Comprehensively considering magnet ring itself also has certain attenuation to pulse travelling wave current, estimates the critical saturation of ferrite bead under VFTO
Electric current is in the 1kA order of magnitude.
Extra-high voltage GIS wave impedance is generally 70~100 Europe, estimates by peak-to-peak value breakdown voltage 1800kV, after breakdown for the first time
Pulse amplitude 900kV, 10kA or so can be reached by generating pulse current amplitude, and magnet ring is difficult work under the transient current of such amplitude
Make in linear zone.
When magnet ring is applied in extra-high voltage GIS, the saturation of magnetic material is inevitable.Magnet ring saturation effect can substantially weaken
The effect for inhibiting VFTO even loses the ability for inhibiting VFTO under big travelling wave current, and magnet ring, which inhibits the maximum of VFTO to keep in check, is
The influence of saturation, so need to propose a kind of economic, effective, reliable device now to reduce the travelling wave current by magnet ring,
To guarantee that magnet ring inhibits the reliability of VFTO to limit or even avoid the saturation effect of magnet ring.
Entitled " high-frequency magnetic and a damping are disclosed in UHV transmission technology international conference collection of thesis in 2009
Resistance inhibits the simulation study of the VFTO of extra-high voltage GIS " technical literature, propose in the technical literature with high-frequency magnetic and
Damping resistance inhibits the method for VFTO jointly, high-frequency magnetic string is provided on the high-voltage conductive rod of GIS, then outside magnet ring string
The damping resistance for placing tubular, thus constitutes coaxial configuration, for the power current of normal operation, frequency is lower, by high frequency
The influence of magnet ring string and damping resistance is smaller, and electric current mainly passes through conducting rod, and for VFTO, high-frequency magnetic significantly increases conduction
The reactance of bar, so that high-frequency current channel damping resistance, generates decaying, the method principle is similar to skin effect losses, high frequency
Magnet ring makes high frequency transient more tend to conductive surface, and the resistance material of conductive surface generates bigger high-frequency loss.High-frequency magnetic
Refraction, the reflection that GIS bus upgoing wave can be damped with damping resistance, inhibit the high fdrequency component in VFTO, reduce VFTO's
Amplitude and steepness.
As shown in Figure 1, for the structural representation of high-frequency magnetic disclosed in the technical literature and the cooperation of damping resistance and conducting rod
Figure, the shape of conducting rod 101 are elongated rod shape, and the axis arrangement around conducting rod is offered on the outer peripheral surface of conducting rod 101
Annular groove is assembled, magnet ring string group 102 is disposed with from inside to outside in annular groove, is arranged on the outer peripheral surface of magnet ring string group 102
Two cell walls along 101 length direction of conducting rod of the damping resistance of tubular, that is, resistance cylinder 103, damping resistance and assembly annular groove support
It is close together, realizes the conducting of conducting rod 101 and resistance cylinder 103.But wherein the problem is that: on conducting rod 101 processing
Assembly annular groove is complex out, is not easy to conducting rod 101 and is assembled with resistance cylinder 103.
Summary of the invention
The purpose of the present invention is to provide a kind of VFTO to inhibit device, is able to solve conducting rod and resistance in the prior art
The complicated problem of processing, assembly；Another object of the present invention is to provide a kind of GIS device for inhibiting device using the VFTO,
It is able to suppress VFTO, improves safety.
To achieve the above object, the VFTO in the present invention inhibits device using the first following technical solution:
VFTO inhibits device, including conducting rod, is arranged with magnet ring string group, the magnet ring string on the outer peripheral surface of the conducting rod
Resistance cylinder is arranged on the outer peripheral surface of group, the both ends of the resistance cylinder are respectively arranged on conducting rod length direction beyond magnet ring
The extension of string group forms annular space between the extension and conducting rod, be equipped on the extension by resistance cylinder
The jackscrew being fixed on conducting rod, the jackscrew, which has, to be contacted across annular space with conducting rod to realize that resistance cylinder and conducting rod are led
Logical, the jackscrew is made of an electrically conducting material.
The beneficial effect is that: it is closed using the jackscrew being made of an electrically conducting material resistance cylinder and conducting rod are formed connection
System, one side jackscrew structure is simple, and also more convenient when using jackscrew, it is only necessary to be threaded in or out jackscrew, make jackscrew
It is corresponding with conducting rod periphery face contact or to disengage, so that it may it realizes and resistance cylinder is turned on or off with conducting rod, resistance cylinder
Parallel connectivity is formed with conducting rod, does not need again to carry out conducting rod complicated processing transformation, assembly relation is simple；It is another
The cooperation requirement of aspect, jackscrew and conducting rod is more wide in range, when the contact area of jackscrew and conducting rod is smaller, jackscrew and conduction
Contact resistance is formed between bar, the resistance that jackscrew-conducting rod can be made to form access becomes larger, and further reduces through magnet ring string
The travelling wave current of group improves the effect that magnet ring string group inhibits VFTO, and the cooperation of jackscrew and conducting rod is required without so tight
Lattice, technical staff do not need often come the matching relationship for checking jackscrew and conducting rod, and assembly is simple.In addition, being set on resistance cylinder
It is equipped with extension, forms annular space between extension and conducting rod, jackscrew with the extension at resistance cylinder both ends by cooperating
Realize resistance cylinder and conducting rod, magnet ring string group it is in parallel, make jackscrew with the installation space contacted with conducting rod, and energy
Increase the quantity of jackscrew enough to improve on-state rate and stability.
Further, the axis on the extension around conducting rod is evenly equipped with two or more jackscrews.
The beneficial effect is that: increase the quantity of jackscrew, can be improved stability.
To achieve the above object, the GIS device in the present invention is using the first following technical solution:
GIS device inhibits device including the VFTO between bus and connection bus, and it includes conducting rod that VFTO, which inhibits device,
It is arranged with magnet ring string group on the outer peripheral surface of the conducting rod, resistance cylinder, the electricity are arranged on the outer peripheral surface of the magnet ring string group
Resistance cylinder both ends be respectively arranged on conducting rod length direction exceed magnet ring string group extension, the extension with lead
Annular space is formed between electric pole, and the jackscrew being fixed on resistance cylinder on conducting rod, the jackscrew tool are equipped on the extension
Have and contact across annular space with conducting rod to realize that resistance cylinder is connected with conducting rod, the jackscrew is made of an electrically conducting material.
The beneficial effect is that: it is closed using the jackscrew being made of an electrically conducting material resistance cylinder and conducting rod are formed connection
System, one side jackscrew structure is simple, and also more convenient when using jackscrew, it is only necessary to be threaded in or out jackscrew, make jackscrew
It is corresponding with conducting rod periphery face contact or to disengage, so that it may it realizes and resistance cylinder is turned on or off with conducting rod, resistance cylinder
Parallel connectivity is formed with conducting rod, does not need again to carry out conducting rod complicated processing transformation, assembly relation is simple；It is another
The cooperation requirement of aspect, jackscrew and conducting rod is more wide in range, when the contact area of jackscrew and conducting rod is smaller, jackscrew and conduction
Contact resistance is formed between bar, the resistance that jackscrew-conducting rod can be made to form access becomes larger, and further reduces through magnet ring string
The travelling wave current of group improves the effect that magnet ring string group inhibits VFTO, and the cooperation of jackscrew and conducting rod is required without so tight
Lattice, technical staff do not need often come the matching relationship for checking jackscrew and conducting rod, and assembly is simple.In addition, being set on resistance cylinder
It is equipped with extension, forms annular space between extension and conducting rod, jackscrew with the extension at resistance cylinder both ends by cooperating
Realize resistance cylinder and conducting rod, magnet ring string group it is in parallel, make jackscrew with the installation space contacted with conducting rod, and energy
Increase the quantity of jackscrew enough to improve on-state rate and stability, and then improves the electrical safety of GIS device.
Further, the axis on the extension around conducting rod is evenly equipped with two or more jackscrews.
The beneficial effect is that: increase the quantity of jackscrew, can be improved stability.
To achieve the above object, the VFTO in the present invention inhibits device using second following of technical solution:
VFTO inhibits device, and including the conducting rod arranged along itself axially spaced-apart, there is at least parallel arrangement between conducting rod
Two or more branch conductors are arranged with magnet ring string group on the outer peripheral surface of each branch conductors, are arranged on the outer peripheral surface of magnet ring string group
There is resistance cylinder, the both ends of the resistance cylinder are respectively arranged with the extension for exceeding magnet ring string group on conducting rod length direction,
Annular space is formed between the extension and conducting rod, is equipped on the extension and resistance cylinder is fixed on conducting rod
Jackscrew, the jackscrew, which has, to be contacted across annular space with conducting rod to realize that resistance cylinder is connected with conducting rod, and the jackscrew is by conduction
Material is made.
The beneficial effect is that: firstly, being made by being provided with two or more branch conductors between conducting rod by leading
The electric current of electric pole while branch conductors of choosing the road through are reduced by the travelling wave current of branch conductors, magnet ring are arranged in branch conductors
String group, travelling wave current is smaller can not to make magnet ring reach saturation, to ensure that magnet ring can steadily inhibit VFTO；And more
For the branch conductors of parallel arrangement when being passed through electric current, current direction is identical, and parasitic inductance, energy can be generated in each branch conductors
Enough be further reduced electric current, guarantee magnet ring will not be made to reach saturation by the travelling wave current of magnet ring, can also guarantee magnet ring not by
The influence of saturation effect guarantees that magnet ring inhibits the reliability of VFTO.
Secondly, resistance cylinder and branch conductors are formed connection relationship using the jackscrew being made of an electrically conducting material, on the one hand
Jackscrew structure is simple, and also more convenient when using jackscrew, it is only necessary to be threaded in or out jackscrew, keep jackscrew corresponding and branch
Conductor periphery face contact disengages, so that it may which resistance cylinder is turned on or off by realization with branch conductors, resistance cylinder and branch
Conductor forms parallel connectivity, does not need again to carry out branch conductors complicated processing transformation, assembly relation is simple；Another party
The cooperations of face, jackscrew and branch conductors require it is more wide in range, when the contact area of jackscrew and branch conductors is smaller, jackscrew with point
Contact resistance is formed between branch conductor, the resistance that jackscrew-branch conductors can be made to form access becomes larger, and further passes through to reduce
The travelling wave current of magnet ring string group improves the effect that magnet ring string group inhibits VFTO, and the cooperation of jackscrew and branch conductors requires not having
Have so strictly, technical staff does not need often come the matching relationship for checking jackscrew and conducting rod, and assembly is simple.In addition, in electricity
It it is provided with extension on resistance cylinder, forms annular space between extension and branch conductors, jackscrew with resistance cylinder both ends by prolonging
Extending portion distribution close realize resistance cylinder and branch conductors, magnet ring string group it is in parallel, make jackscrew with being contacted with branch conductors
Installation space, and the quantity of jackscrew can be increased to improve on-state rate and stability.
Further, the axis on the extension around conducting rod is evenly equipped with two or more jackscrews.
Further, the branch conductors are arranged in parallel between two conducting rods.
The beneficial effect is that: branch conductors are arranged in parallel, can be made through the electric current of conducting rod as homogeneously as possible
Generated parasitic inductance intensity is higher between the branch conductors for being distributed in branch conductors, and being arranged in parallel.
Further, the conducting rod include along conducting rod project radially outward with for being connect with branch conductors
Transition disc, the branch conductors are evenly arranged on transition disc.
The beneficial effect is that: it is provided with transition disc on conducting rod, has more when branch conductors are connected on transition disc
Magnet ring string group is sleeved in branch conductors by big arrangement space convenient for technical staff, and transition disc is arranged can increase and lead
Contact area between electric pole and branch conductors enables branch conductors to undertake bigger electric current.
Further, the cross-sectional area sum of the branch conductors is greater than the cross-sectional area of conducting rod.
The beneficial effect is that: the cross-sectional area sum of branch conductors is greater than the cross-sectional area of conducting rod, can guarantee point
Branch conductor can carry by conducting rod transmitting Lai distribution electric current.
To achieve the above object, the GIS device in the present invention is using second following of technical solution:
GIS device inhibits device including the VFTO between bus and connection bus, and it includes along itself axis that VFTO, which inhibits device,
To spaced apart conducting rod, parallel arrangement has at least two or more branch conductors between conducting rod, each branch conductors it is outer
It is arranged with magnet ring string group on circumferential surface, resistance cylinder is arranged on the outer peripheral surface of magnet ring string group, the both ends of the resistance cylinder are respectively set
There is the extension for exceeding magnet ring string group on conducting rod length direction, form annular space between the extension and conducting rod,
Be equipped with jackscrew resistance cylinder being fixed on conducting rod on the extension, the jackscrew has across annular space and conducting rod
To realize that resistance cylinder is connected with conducting rod, the jackscrew is made of an electrically conducting material for contact.
The beneficial effect is that: firstly, being made by being provided with two or more branch conductors between conducting rod by leading
The electric current of electric pole while branch conductors of choosing the road through are reduced by the travelling wave current of branch conductors, magnet ring are arranged in branch conductors
String group, travelling wave current is smaller can not to make magnet ring reach saturation, to ensure that magnet ring can steadily inhibit VFTO；And more
For the branch conductors of parallel arrangement when being passed through electric current, current direction is identical, and parasitic inductance, energy can be generated in each branch conductors
Enough be further reduced electric current, guarantee magnet ring will not be made to reach saturation by the travelling wave current of magnet ring, can also guarantee magnet ring not by
The influence of saturation effect guarantees that magnet ring inhibits the reliability of VFTO, and then improves the electrical safety of GIS device.
Secondly, resistance cylinder and branch conductors are formed connection relationship using the jackscrew being made of an electrically conducting material, on the one hand
Jackscrew structure is simple, and also more convenient when using jackscrew, it is only necessary to be threaded in or out jackscrew, keep jackscrew corresponding and branch
Conductor periphery face contact disengages, so that it may which resistance cylinder is turned on or off by realization with branch conductors, resistance cylinder and branch
Conductor forms parallel connectivity, does not need again to carry out branch conductors complicated processing transformation, assembly relation is simple；Another party
The cooperations of face, jackscrew and branch conductors require it is more wide in range, when the contact area of jackscrew and branch conductors is smaller, jackscrew with point
Contact resistance is formed between branch conductor, the resistance that jackscrew-branch conductors can be made to form access becomes larger, and further passes through to reduce
The travelling wave current of magnet ring string group improves the effect that magnet ring string group inhibits VFTO, and the cooperation of jackscrew and branch conductors requires not having
Have so strictly, technical staff does not need often come the matching relationship for checking jackscrew and conducting rod, and assembly is simple.In addition, in electricity
It it is provided with extension on resistance cylinder, forms annular space between extension and branch conductors, jackscrew with resistance cylinder both ends by prolonging
Extending portion distribution close realize resistance cylinder and branch conductors, magnet ring string group it is in parallel, make jackscrew with being contacted with branch conductors
Installation space, and the quantity of jackscrew can be increased to improve on-state rate and stability.
Further, the axis on the extension around conducting rod is evenly equipped with two or more jackscrews.
Further, the branch conductors are arranged in parallel between two conducting rods.
The beneficial effect is that: branch conductors are arranged in parallel, can be made through the electric current of conducting rod as homogeneously as possible
Generated parasitic inductance intensity is higher between the branch conductors for being distributed in branch conductors, and being arranged in parallel.
Further, the conducting rod include along conducting rod project radially outward with for being connect with branch conductors
Transition disc, the branch conductors are evenly arranged on transition disc.
The beneficial effect is that: it is provided with transition disc on conducting rod, has more when branch conductors are connected on transition disc
Magnet ring string group is sleeved in branch conductors by big arrangement space convenient for technical staff, and transition disc is arranged can increase and lead
Contact area between electric pole and branch conductors enables branch conductors to undertake bigger electric current.
Further, the cross-sectional area sum of the branch conductors is greater than the cross-sectional area of conducting rod.
The beneficial effect is that: the cross-sectional area sum of branch conductors is greater than the cross-sectional area of conducting rod, can guarantee point
Branch conductor can carry by conducting rod transmitting Lai distribution electric current.
Detailed description of the invention
Fig. 1 is high-frequency magnetic in the prior art and damping resistance matching relationship schematic diagram；
Fig. 2 is the structural schematic diagram for the embodiment 1 that VFTO inhibits device in the present invention；
Fig. 3 is the structural schematic diagram for the embodiment 2 that VFTO inhibits device in the present invention.
In figure: 101. conducting rods；102. magnet ring string group；103. resistance cylinder；201. conducting rod；202. magnet ring string groups；203.
Resistance cylinder；204. transition disc；205. branch conductors；206. jackscrew；301. conducting rod；302. magnet ring string groups；303. resistance cylinders；
306. jackscrew.
Specific embodiment
The specific embodiment of device and GIS device is inhibited to be illustrated the VFTO in the present invention now in conjunction with attached drawing,
As shown in Fig. 2, inhibiting the embodiment 1:VFTO of device to inhibit device including two along itself axially spaced-apart cloth for VFTO in the present invention
The conducting rod 201 set, the connection of conducting rod 201 can play the role of turning circuit in circuit.It is set between two conducting rods 201
The branch conductors 205 of more parallel arrangements are equipped with, branch conductors 205 are connected between two conducting rods 201, in conducting rod
The structure of parallel arrangement is formd between 201.Branch conductors 205 can shunt the electric current by conducting rod 201, each
It is arranged with magnet ring string group 202 on the outer peripheral surface of branch conductors 205, is arranged with resistance cylinder 203 on the outer peripheral surface of magnet ring string group 202.
Insulating layer is provided between branch conductors 205 and magnet ring string group 202.By the shunting of branch conductors 205, magnet ring string group can be made
The travelling wave current passed through in 202 reduces, to reduce the influence being saturated to magnet ring string group 202, magnet ring string group 202 can be to VFTO
Generation effectively inhibits.And multiple jackscrews 206 being made of an electrically conducting material are evenly equipped between resistance cylinder 203 and branch conductors 205.
Resistance cylinder 203 include positioned at 203 both ends of resistance cylinder, on 201 length direction of conducting rod exceed magnet ring string group 202 extension
Point, the annular space for surrounding 201 axis of conducting rod, resistance are formd between the extension and conducting rod 201 of resistance cylinder 203
The screw hole being threadedly engaged with jackscrew 206 is offered on the extension at the both ends of cylinder 203, and jackscrew 206 is from the outside of resistance cylinder 203
Penetrate, and by being threadedly engaged with screw hole across resistance cylinder 203, one end of jackscrew 206 in 206 motion process of jackscrew with conduction
The outer peripheral surface of bar 201 is close, and is finally resisted against on the outer peripheral surface of conducting rod 201, and jackscrew 206 is contacted with conducting rod 201
One end is the contact jaw of jackscrew 206, and when VFTO inhibits device work, the contact jaw of jackscrew 206 is outer with conducting rod 201 always
Circumferential surface is kept in contact, and is realized conducting rod 201 and resistance cylinder 203 by jackscrew 206 and is connected, passes through the jackscrew at both ends on resistance cylinder
It is in parallel with magnet ring string group 202 to can be realized resistance cylinder 203.
The transition disc of conducting rod 201 and the switching of branch conductors 205 is provided between conducting rod 201 and branch conductors 205
204, transition disc 204 protrudes the outer peripheral surface of conducting rod 201 along the radial direction of conducting rod 201, and branch conductors 205 were connected to
There is biggish installation space and contact area when crossing on disk 204.Branch conductors 205 pass through transition disc 204 and 201 shape of conducting rod
At connection, parallel relationship is formd between each branch conductors 205.The cross-sectional area sum of each branch conductors 205 is greater than conducting rod
201 cross-sectional area is to guarantee that each branch conductors 205 are able to bear distributed electric current.
Resistance cylinder 203 is arranged on the outer peripheral surface of magnet ring string group 202, resistance cylinder 203 passes through jackscrew 206 and branch conductors
205 realize conducting, are equivalent to and have been arranged in parallel resistance, resistance cylinder 203 and 202 structure of magnet ring string group at the both ends of magnet ring string group 202
It can to the distribution of resistance cylinder 203 for being located at parallel-connection structure outermost end using kelvin effect extremely strong under high frequency at parallel-connection structure
The travelling wave current of sight, and traveling wave energy is consumed by resistance cylinder 203, travelling wave current is reduced to the inhibiting effect of VFTO.When
When VFTO passes through the branch conductors 205 in conducting rod 201, travelling wave current very high frequency, current distribution shows extremely strong collection skin
Effect, current density inhibit the radial direction of device to increase along VFTO, and travelling wave current can inhibit the electricity in device by way of VFTO
Cylinder 203 is hindered, there is maximum current density at resistance cylinder 203, i.e., be assigned main travelling wave current on resistance cylinder 203, and
Travelling wave current greatly reduces in the magnet ring string group 202 of 203 inside of resistance cylinder, reduces travelling wave current to magnet ring string group 202
Saturated characteristic influence.
But when the resistance of resistance cylinder 203 is very big, close to open circuit, shunting function very little；When the resistance of resistance cylinder 203
When very little, close to short circuit, the effect of magnet ring string group 202 is eliminated, can also disappear to the inhibiting effect of VFTO, therefore resistance cylinder
203 resistance has an optimal value, and optimal value can be estimated as follows:
Ro=kR=k ρ L/S=k ρ NH/S
Wherein, k is coefficient, and R is the equivalent resistance of magnet ring string, and ρ is magnet ring resistivity (unit Ω m), and L is that magnet ring string has
Length is imitated, S is magnet ring truncation area, and N is the magnet ring quantity that a magnet ring string is included, and H is the thickness of single magnet ring.Recommend
The optimum valuing range of coefficient k are as follows: 5~30.
By the way that resistance cylinder 203 is in parallel with magnet ring string group 202, shunting function on the one hand may be implemented, promote travelling wave current
By way of resistance cylinder 203, the current density that resistance cylinder 203 goes out is improved, the degree of saturation of magnet ring string group 202 is reduced, increases magnet ring string
The inhibitory effect of 202 couples of VFTO of group；Another aspect electric current can absorb transient state energy by resistance cylinder 203, resistance cylinder 203, drop
The amplitude of low VFTO increases the decaying of VFTO, and these two aspects, which is mutually promoted, further increases the inhibitory effect of VFTO.
Resistance cylinder 203 is fixed on the outer peripheral surface of branch conductors 205 and magnet ring string group 202 by jackscrew 206, it is only necessary to
Resistance cylinder 203 is processed, jackscrew 206 and the screw hole of resistance cylinder 203 are threadedly engaged, and are capable of forming stable connection and are closed
System, and when the contact jaw of jackscrew 206 and 205 periphery face contact of branch conductors, high-intensitive connection relationship is not needed, is only met
Energy when jackscrew 206 contacts the requirement of conducting, jackscrew 206 and the smaller contact area of branch conductors 205 with branch conductors 205
Contact resistance is enough formed, increases the resistance value between jackscrew 206 and branch conductors 205, further decreases travelling wave current.And
Since the contact with branch conductors 205 of jackscrew 206 requirement is more loose, technical staff does not need to twist very tight by jackscrew 206,
The matching relationship for often going to check jackscrew 206 and branch conductors 205 is not needed, it is with strong applicability.
When technical staff assembles the VFTO inhibition device in the present invention, VFTO inhibits conducting rod 201, the transition disc of device
204 and branch conductors 205 can be the part being separately separated, be then assembled into together.Resistance cylinder 203 and magnet ring string group
202 are still further assembled in branch conductors 205.Wherein, first insulating layer is set in branch conductors 205, then outside insulating layer
Magnet ring string group 202 is set, and the quantity of the magnet ring monomer in magnet ring string group 202 is carried out according to operating condition, transient emulation and engineering experience
It adjusts, the internal diameter of the magnet ring monomer in magnet ring string group 202 is identical as the outer diameter of branch conductors 205, magnet ring monomer
Outer diameter is identical as the internal diameter of resistance cylinder 203, and magnet ring string group 202 bonds together with resistance cylinder 203.
After jackscrew 206 penetrates into resistance cylinder 203, resistance cylinder 203 and branch conductors 205 can either be connected, jackscrew
206 press to the end position of resistance cylinder 203 in the axis of resistance cylinder 203, make the both ends open of resistance cylinder to contract, by magnet ring
String group 202 is pressed to the middle part of resistance cylinder 203 by the end of resistance cylinder 203, realizes the magnetic in 206 limiting resistance cylinder 203 of jackscrew
The function of the displacement of ring string group 202, the contact jaw of jackscrew 206 are formd with the one end of jackscrew 206 contacted with resistance cylinder 203 and are led
The access that the resistance cylinder 203 that is powered is connected to branch conductors 205.
Device is inhibited for the VFTO in embodiment 1, in other embodiments, due to the limitation of certain structures, each branch
It can be connected between two conducting rods with a kind of radial connection type between conductor, and no longer using the side of parallel arrangement
Formula；Each branch conductors can be connected directly between in the corresponding end surface of conducting rod, and transition disc is no longer arranged and connect with branch conductors；
The cross-sectional area sum of each branch conductors can be less than or equal to the cross-sectional area of conducting rod.
As shown in figure 3, inhibiting the embodiment 2 of device for VFTO in the present invention: inhibiting to fill with the VFTO in above-described embodiment 1
Set that there are no more branch conductors the difference is that VFTO inhibits on conducting rod 301 in device, but directly by resistance
Cylinder 303 is arranged on conducting rod 301.Magnet ring string group 302 is provided on conducting rod 301, resistance cylinder 303 is fixed by jackscrew 306
On conducting rod 301.
In other embodiments, the jackscrew on resistance cylinder can be provided only with one.
Device is inhibited for the VFTO in embodiment 1, embodiment 2, can connect in the circuit for needing that magnet ring is inhibited to be saturated
In, such as be arranged in the connection line of GIS, GIL, it can also be used as an individual product and sold.For normally transporting
Capable power current, frequency is lower, and magnet ring is only sensitive to high-frequency signal, therefore power current mainly passes through inner conductive bar,
Magnet ring string group is hardly flowed through, therefore resistance cylinder and the parallel-connection structure of magnet ring string group do not interfere with the normal fortune of GIS or GIL
Row.
In other embodiments, jackscrew can also be located proximate to the setting of magnet ring string group, make jackscrew is located at resistance cylinder
Interior bar portion is supported on the side of magnet ring string group, by the displacement of jackscrew limitation magnet ring string group.
GIS device in the present invention inhibits device including bus and the VFTO being connected between bus, and VFTO inhibits dress
It sets, the VFTO in above-described embodiment can be used and inhibit device, therefore the specific embodiment about GIS device, here no longer
It repeats.
Above-described specific embodiment, to goal of the invention of the invention, technical scheme and beneficial effects carried out into
One step is described in detail, it should be understood that being not used to limit this foregoing is merely a specific embodiment of the invention
The protection scope of invention, all any modification, equivalent substitution, improvement and etc. within the spirit and principles in the present invention, done,
It should be included within protection scope of the present invention.
Claims (9)
1. a kind of VFTO inhibits device, it is characterised in that: including conducting rod, magnet ring string is arranged on the outer peripheral surface of the conducting rod
Group is arranged with resistance cylinder on the outer peripheral surface of the magnet ring string group, and the both ends of the resistance cylinder are respectively arranged in conductive pole length
The extension for exceeding magnet ring string group on direction, forms annular space between the extension and conducting rod, on the extension
Be equipped with jackscrew resistance cylinder being fixed on conducting rod, the jackscrew, which has, to be contacted across annular space with conducting rod to realize resistance
Cylinder is connected with conducting rod, and the jackscrew is made of an electrically conducting material.
2. VFTO according to claim 1 inhibits device, it is characterised in that: surround the axis of conducting rod on the extension
Line is evenly equipped with two or more jackscrews.
3. a kind of VFTO inhibits device, it is characterised in that: including the conducting rod arranged along itself axially spaced-apart, between conducting rod simultaneously
Connection is disposed at least two or more branch conductors, is arranged with magnet ring string group on the outer peripheral surface of each branch conductors, magnet ring string group
Resistance cylinder is arranged on outer peripheral surface, the both ends of the resistance cylinder are respectively arranged on conducting rod length direction beyond magnet ring string group
Extension, form annular space between the extension and conducting rod, be equipped on the extension and fix resistance cylinder
Jackscrew on conducting rod, the jackscrew, which has, to be contacted across annular space with conducting rod to realize that resistance cylinder is connected with conducting rod, institute
Jackscrew is stated to be made of an electrically conducting material.
4. VFTO according to claim 3 inhibits device, it is characterised in that: surround the axis of conducting rod on the extension
Line is evenly equipped with two or more jackscrews.
5. VFTO according to claim 3 inhibits device, it is characterised in that: the branch conductors are arranged in parallel in two conductions
Between bar.
6. the VFTO according to any one of claim 3-5 inhibit device, it is characterised in that: the conducting rod include along
Conducting rod project radially outward with the transition disc for being connect with branch conductors, the branch conductors are evenly arranged on transition disc
On.
7. the VFTO according to any one of claim 3-5 inhibit device, it is characterised in that: the branch conductors it is transversal
The sum of area is greater than the cross-sectional area of conducting rod.
8.GIS equipment inhibits device including the VFTO between bus and connection bus, it is characterised in that: the VFTO inhibits dress
It is set to VFTO described in the claims 1 or 2 and inhibits device.
9.GIS equipment inhibits device including the VFTO between bus and connection bus, it is characterised in that: the VFTO inhibits dress
It is set to VFTO described in any one of the claims 3 to 7 and inhibits device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082882.3A CN109888740B (en) | 2019-01-23 | 2019-01-23 | VFTO restraining device and GIS equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910082882.3A CN109888740B (en) | 2019-01-23 | 2019-01-23 | VFTO restraining device and GIS equipment |
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| CN109888740A true CN109888740A (en) | 2019-06-14 |
| CN109888740B CN109888740B (en) | 2021-04-30 |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110007439A1 (en) * | 2009-07-08 | 2011-01-13 | Asakawa Masao | Composite electronic device |
| CN104134502A (en) * | 2013-05-24 | 2014-11-05 | 国家电网公司 | Gapless metal oxide arrester |
| CN205264589U (en) * | 2015-12-08 | 2016-05-25 | 新东北电气集团超高压有限公司 | Restrain device that isolator operation produced VFTO |
| CN205723039U (en) * | 2016-04-18 | 2016-11-23 | 上海久能机电制造有限公司 | A kind of novel cylinder helical inductor resistance unit |
| CN205828851U (en) * | 2016-04-25 | 2016-12-21 | 南通汇丰电子科技有限公司 | A kind of conducting ring device and conducting ring group |
| CN106486991A (en) * | 2015-08-27 | 2017-03-08 | 中国电力科学研究院 | A kind of damping bus for suppressing VFTO |
| 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 |
| CN206274491U (en) * | 2016-11-18 | 2017-06-23 | 国家电网公司 | A kind of capacitance-resistance module and the divider including the capacitance-resistance module |
| CN106992509A (en) * | 2017-05-18 | 2017-07-28 | 中国电力科学研究院 | A kind of laminated bus guide rod and suppressing method for being used to suppress VFTO |
| CN108923342A (en) * | 2018-05-28 | 2018-11-30 | 中国电力科学研究院有限公司 | A kind of GIS outlet casing tube with damping function |
-
2019
- 2019-01-23 CN CN201910082882.3A patent/CN109888740B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110007439A1 (en) * | 2009-07-08 | 2011-01-13 | Asakawa Masao | Composite electronic device |
| CN104134502A (en) * | 2013-05-24 | 2014-11-05 | 国家电网公司 | Gapless metal oxide arrester |
| CN106486991A (en) * | 2015-08-27 | 2017-03-08 | 中国电力科学研究院 | A kind of damping bus for suppressing VFTO |
| CN205264589U (en) * | 2015-12-08 | 2016-05-25 | 新东北电气集团超高压有限公司 | Restrain device that isolator operation produced VFTO |
| CN205723039U (en) * | 2016-04-18 | 2016-11-23 | 上海久能机电制造有限公司 | A kind of novel cylinder helical inductor resistance unit |
| CN205828851U (en) * | 2016-04-25 | 2016-12-21 | 南通汇丰电子科技有限公司 | A kind of conducting ring device and conducting ring group |
| CN206274491U (en) * | 2016-11-18 | 2017-06-23 | 国家电网公司 | A kind of capacitance-resistance module and the divider including the capacitance-resistance module |
| 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 |
| CN106992509A (en) * | 2017-05-18 | 2017-07-28 | 中国电力科学研究院 | A kind of laminated bus guide rod and suppressing method for being used to suppress VFTO |
| CN108923342A (en) * | 2018-05-28 | 2018-11-30 | 中国电力科学研究院有限公司 | A kind of GIS outlet casing tube with damping function |
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|---|---|
| CN109888740B (en) | 2021-04-30 |
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