CN106992509B - It is a kind of for inhibiting the laminated bus guide rod and suppressing method of VFTO - Google Patents
It is a kind of for inhibiting the laminated bus guide rod and suppressing method of VFTO Download PDFInfo
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- CN106992509B CN106992509B CN201710351741.8A CN201710351741A CN106992509B CN 106992509 B CN106992509 B CN 106992509B CN 201710351741 A CN201710351741 A CN 201710351741A CN 106992509 B CN106992509 B CN 106992509B
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- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims description 22
- 230000001052 transient effect Effects 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 238000013016 damping Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 229910000476 molybdenum oxide Inorganic materials 0.000 claims description 7
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical group [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 claims description 7
- 229910000859 α-Fe Inorganic materials 0.000 claims description 7
- 238000009413 insulation Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 abstract description 2
- 238000011161 development Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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
-
- 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
- H02H9/042—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage comprising means to limit the absorbed power or indicate damaged over-voltage protection device
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of for inhibiting the laminated bus guide rod of VFTO, it include: internal resistance layer, inductor layer and external electrical resistance layer, the internal resistance layer, inside is center vacancy section, outside is inductor layer, is provided commonly for after special fast transient overvoltage VFTO is formed with the external electrical resistance layer, absorbs traveling wave energy, the active loss for increasing bus guide rod, reduces the amplitude and frequency of VFTO；The inductor layer, inside are internal resistance layer, and outside is external electrical resistance layer, comprising: magnet ring and height lead medium, for normal transmission electric current under the conditions of power frequency.The beneficial effects of the present invention are: by way of changing bus wave impedance, increase the active loss of this section of bus bar, inhibit the development of traveling wave, to achieve the purpose that reduce the amplitude and frequency of VFTO, help to improve the safe and reliable operation of primary equipment, primary equipment insulation damages risk is reduced, but also will be helpful to the safe handling of secondary detection equipment, improves the reliability service of the smart machines such as electronic mutual inductor.
Description
Technical field
The present invention relates to power grid O&M fields, and more particularly, to a kind of for inhibiting the laminated bus of VFTO
Guide rod and suppressing method.
Background technique
When special fast transient overvoltage VFTO (Very Fast Transient Over-voltages, VFTO) refers to wavefront
Between transient overvoltage in 3 to 100ns, be primarily due to gas insulated combined electrical equipment GIS (Gas Insulated
Switchgear, GIS) in the factors such as the operation of disconnecting switch cause.When operating the disconnecting switch of GIS, since contact moves
Dynamic speed is slower, and cause between contact estimated for several times wears and repeated breakdown.In making process, lead to the electricity between contact
Pressure drop is low, and the breakdown for being similar to reclosing occurs later, the higher VFTO of voltage magnitude occurs.In addition, during the opening process,
Also due to contact movement speed is slow, repeated breakdown occurs between contact, also will appear the scene similar to reclosing, so can also lead
There is the higher VFTO of voltage magnitude in cause.Since wavefront is steeper, amplitude is higher, VFTO be likely to GIS, winding device and
Transformer and secondary device damage.VFTO upper limiting frequency can reach 5MHz to 40MHz, to GIS built-in electrical insulation supporting element,
Disc insulator and other components generate harm, especially endanger to the transformer, the reactor that are connected by oil-gas casing with GIS
Evil is bigger.With the raising of GIS voltage class, primary equipment opposing insulation nargin is lower, and VFTO endangers risk there are produced
It is bigger.In addition, VFTO is also very serious to the harm of electrical secondary system.The construction of smart grid is so that more and more analog signals
It is digitized, secondary weak electricity system is allowed to move forward near primary equipment, while a large amount of monitoring is nearby also mounted in primary equipment
Equipment.It is found when operation, the overvoltage that isolator operation generates is to lead to one of main reason of secondary failure, is especially pacified
Secondary device failure rate near primary equipment is very high.
The electronic mutual inductor failure of one of feature as smart grid primary equipment is high, is frequently experienced in secondary system
System, including front end circuit, capture card and data processing unit cause crash, messy code or damage etc..One important influence factor
Caused by being exactly the electromagnetic interference that isolator operation generates, including primary equipment ground terminal moment caused by isolator operation
Ground potential increases.
Therefore, it is necessary to a kind of bus guide rods, to solve the problems, such as to inhibit VFTO.
Summary of the invention
The present invention provides a kind of for inhibiting the laminated bus guide rod of VFTO, to solve to ask what VFTO was inhibited
Topic.
To solve the above-mentioned problems, according to an aspect of the invention, there is provided it is a kind of for inhibiting special fast transient state excessively electric
The laminated bus guide rod of VFTO is pressed, the laminated bus guide rod includes: internal resistance layer, inductor layer and external electrical resistance layer,
The internal resistance layer, inside are center vacancy section, and outside is inductor layer, is provided commonly for the external electrical resistance layer
After VFTO is formed, traveling wave energy is absorbed, increases the active loss of bus guide rod, reduces the amplitude and frequency of VFTO；
The inductor layer, inside are internal resistance layer, and outside is external electrical resistance layer, comprising: magnet ring and height lead medium, are used for
Normal transmission electric current under the conditions of power frequency.
Preferably, wherein the height leads medium is symmetrically embedded in magnet ring.
Preferably, wherein the magnet ring is Ferrite Material, it is molybdenum oxide that the height, which leads medium,.
Preferably, wherein the internal resistance layer and external electrical resistance layer are composed in series by noninductive damping resistance.
Preferably, wherein the noninductive damping resistance is electrically connected by inserts or spring leaf and conductive rod tube.
According to another aspect of the present invention, a kind of method for inhibiting VFTO is provided, which comprises
Under the conditions of power frequency, electric current is transmitted by inductor layer, the inductor layer includes: that height leads medium and magnet ring；
After VFTO is formed, traveling wave energy is absorbed by internal resistance layer and external electrical resistance layer, increases having for bus guide rod
Function loss, reduces the amplitude and frequency of VFTO.
Preferably, wherein the height leads medium is symmetrically embedded in magnet ring.
Preferably, wherein the magnet ring is Ferrite Material, it is molybdenum oxide that the height, which leads medium,.
Preferably, the internal resistance layer and external electrical resistance layer are composed in series by noninductive damping resistance.
Preferably, the noninductive damping resistance is electrically connected by inserts or spring leaf and conductive rod tube.
The beneficial effects of the present invention are:
Technical solution of the present invention devises a kind of consumption electronics stream energy and builds up formula bus conductive rod, to inhibit
VFTO increases the active loss of this section of bus bar, inhibits the development of traveling wave by way of changing bus wave impedance, to reach
To the purpose for the amplitude and frequency for reducing VFTO, the safe and reliable operation of primary equipment is helped to improve, it is exhausted to reduce primary equipment
Edge damage risk, but also will be helpful to the safe handling of secondary detection equipment, improve the smart machines such as electronic mutual inductor
Reliability service.Meanwhile the design can not only be transformed existing GIS pipeline, play guidance to novel GIS pipe design and make
With, and the design principle can be applied in arrester casing for reducing the damage that lightning wave insulate to primary equipment.
Detailed description of the invention
By reference to the following drawings, exemplary embodiments of the present invention can be more fully understood by:
Fig. 1 is the top view according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention；
Fig. 2 is the schematic diagram that VFTO is formed；
Fig. 3 is the front view according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention；
Fig. 4 is the side view according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention；And
Fig. 5 is the schematic diagram according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention；
Fig. 6 is the equivalent circuit diagram according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention；
Fig. 7 is the flow chart according to the suppressing method 700 of embodiment of the present invention.
Specific embodiment
Exemplary embodiments of the present invention are introduced referring now to the drawings, however, the present invention can use many different shapes
Formula is implemented, and is not limited to the embodiment described herein, and to provide these embodiments be at large and fully disclose
The present invention, and the scope of the present invention is sufficiently conveyed to person of ordinary skill in the field.Show for what is be illustrated in the accompanying drawings
Term in example property embodiment is not limitation of the invention.In the accompanying drawings, identical cells/elements use identical attached
Icon note.
Unless otherwise indicated, term (including scientific and technical terminology) used herein has person of ordinary skill in the field
It is common to understand meaning.Further it will be understood that with the term that usually used dictionary limits, should be understood as and its
The context of related fields has consistent meaning, and is not construed as Utopian or too formal meaning.
Fig. 1 is the top view according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention.Such as Fig. 1 institute
Show, the laminated bus guide rod for being used to inhibit VFTO includes: center vacancy section 1, magnet ring 2, external electrical resistance layer 3, internal electricity
Resistance layer 4 and height lead medium 5, and the magnet ring and height lead medium and form the inductor layer.Preferably, the internal resistance layer, inside
For center vacancy section, outside is inductor layer, is provided commonly for after special fast transient overvoltage VFTO is formed with the external electrical resistance layer,
Traveling wave energy is absorbed, increases the active loss of bus guide rod, reduces the amplitude and frequency of VFTO.
Preferably, the inductor layer, inside are internal resistance layer, and outside is external electrical resistance layer, under the conditions of power frequency
Normal transmission electric current.Preferably, the height is led medium and is symmetrically embedded in magnet ring.Preferably, the magnet ring is Ferrite Material,
It is molybdenum oxide that the height, which leads medium,.Preferably, the internal resistance layer and external electrical resistance layer are by noninductive damping resistance series connection group
At the noninductive damping resistance is electrically connected by inserts or spring leaf and conductive rod tube.Fig. 3 is according to embodiment of the present invention
For inhibit VFTO laminated bus guide rod front view.Fig. 4 is according to embodiment of the present invention for inhibiting VFTO
Laminated bus guide rod side view.
Fig. 2 is the schematic diagram that VFTO is formed.As shown in Fig. 2, having two sections of buses, wave in GIS for the schematic diagram that VFTO is formed
Impedance is respectively Z1 and Z2, and the electrically charged G1 and G2 of difference, when switch k closes a floodgate, charge G1 and G2 will be distributed on bus again.
Due to insulation performance good in GIS, in bus-bar charge re-allocation process, energy loss is very faint, generates traveling wave in bus
Both ends catadioptric forms that amplitude is very high, quick steep wave overvoltage of the frequency up to 5 to 40MHz, i.e. VFTO is formed.
Fig. 5 is the schematic diagram according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention.Such as Fig. 5 institute
Show, changes the wave impedance of one section of bus conductive rod in the form of laminated bus guide rod in GIS, i.e. inductance L parallel resistance R's
Form, traveling wave form high voltage in residual inductance section, and both ends resistance absorbs traveling wave energy under action of high voltage.Magnet ring
Two imperfect semi-circular portions are cut into, lead medium being embedded in height between two semicircles.It is consistent with magnet ring characteristic, this height
It is minimum to lead medium resistance value under the conditions of power frequency, as its induction reactance of the increase of frequency value is great bigger, i.e., electric current is in normal condition
Medium transmission is led by this height down, occurs after VFTO then entering in the lesser resistor rod of impedance since its induction reactance is excessive, due to
Its energy is smaller, therefore is absorbed by resistor rod and generate minimum active loss, then can achieve the effect for reducing amplitude and frequency.
The height of insertion leads medium and magnet ring material is different, and the induction reactance variation amplitude of the two is different, and magnet ring is ferrite under normal circumstances
Material, and height leads medium using materials such as molybdenum oxides, plays the improvement result to common magnet ring.
Fig. 6 is the equivalent circuit diagram according to the laminated bus guide rod for inhibiting VFTO of embodiment of the present invention.Such as
Shown in Fig. 6, the perceptual substance L and resistance R of laminated bus guide rod are realized with element with distributed parameters.L1 represents ring inductance
Amount；L2 represents height and leads medium inductance；R1 represents internal resistance stick resistance；R2 represents non-essential resistance stick resistance.Perceptual substance L increases
Traveling wave two-way time, i.e. reduction VFTO frequency are added, while having improved the voltage at the end resistance R, so that traveling wave charge flows through R and generates energy
Consumption.The parameter of perceptual substance L and resistance R is depending on inhibiting VFTO simulation result.Transient process calculates, and to consider perception
Substance L's is non-linear.In embodiments of the present invention, R1 resistance is 10 Ω, 1 Ω of resistance when L2 high leads medium power frequency, with frequency
Rate increases its impedance in increasing trend, and it is 100 Ω that resistance value is presented when frequency reaches 1MHz.Magnet ring is common magnet ring, no spy
It is different to require.According to emulation and measured result it is found that the VFTO amplitude in former GIS pipeline can be sponged 30% under the design method
More than, inhibit the effect of VFTO to be much better than current magnet ring.
The design principle of magnet ring is added to can be not only used for the absorption in GIS to VFTO in addition, height of the invention leads medium,
Can be in arrester casing for absorbing lightning wave, i.e. inside pipe casing conducting rod adds the folded of magnet ring power-up resistance using high medium of leading
Structure designs when pressure.
Fig. 7 is the flow chart according to the suppressing method 700 of embodiment of the present invention.As shown in fig. 7, the suppressing method
700 for inhibiting VFTO, and the method 700 in step 701 under the conditions of power frequency, passes through electricity since step 101 place
Feel layer and transmit electric current, the inductor layer includes: that height leads medium and magnet ring.Preferably, wherein the height leads medium is symmetrically embedded in
In magnet ring.Preferably, wherein the magnet ring is Ferrite Material, it is molybdenum oxide that the height, which leads medium,.
Preferably, in step 702 after VFTO is formed, traveling wave energy is absorbed by internal resistance layer and external electrical resistance layer,
The active loss for increasing bus guide rod, reduces the amplitude and frequency of VFTO.Preferably, the internal resistance layer and external electrical resistance layer
It is composed in series by noninductive damping resistance.Preferably, the noninductive damping resistance passes through inserts or spring leaf and conductive rod tube electricity
Gas connection.
The embodiment of the present invention for inhibiting the laminated bus guide rod and another embodiment of the invention of VFTO
VFTO suppressing method 700 is corresponding, and details are not described herein.
The present invention is described by reference to a small amount of embodiment.However, it is known in those skilled in the art, as
Defined by subsidiary Patent right requirement, in addition to the present invention other embodiments disclosed above equally fall in it is of the invention
In range.
Normally, all terms used in the claims are all solved according to them in the common meaning of technical field
It releases, unless in addition clearly being defined wherein.All references " one/described/be somebody's turn to do [device, component etc.] " are all opened ground
At least one example being construed in described device, component etc., unless otherwise expressly specified.Any method disclosed herein
Step need not all be run with disclosed accurate sequence, unless explicitly stated otherwise.
Claims (10)
1. a kind of for inhibiting the laminated bus guide rod of VFTO, which is characterized in that the laminated bus guide rod includes: inside
Resistive layer, inductor layer and external electrical resistance layer,
The internal resistance layer, inside are center vacancy section, and outside is inductor layer, is provided commonly for the external electrical resistance layer in spy
After fast transient overvoltage VFTO is formed, traveling wave energy is absorbed, increases the active loss of bus guide rod, reduces the amplitude and frequency of VFTO
Rate；
The inductor layer, inside are internal resistance layer, and outside is external electrical resistance layer, comprising: magnet ring and height lead medium, in work
Normal transmission electric current under the conditions of frequency.
2. bus guide rod according to claim 1, which is characterized in that the height is led medium and is symmetrically embedded in magnet ring.
3. bus guide rod according to claim 2, which is characterized in that the magnet ring is Ferrite Material, and the height leads Jie
Matter is molybdenum oxide.
4. bus guide rod according to claim 1, which is characterized in that the internal resistance layer and external electrical resistance layer are by nothing
Sense damping resistance is composed in series.
5. bus guide rod according to claim 4, which is characterized in that the noninductive damping resistance passes through inserts or spring leaf
It is electrically connected with conductive rod tube.
6. a kind of method for inhibiting VFTO using bus guide rod as described in claim 1, which is characterized in that the method packet
It includes:
Under the conditions of power frequency, electric current is transmitted by inductor layer, the inductor layer includes: that height leads medium and magnet ring；
After VFTO is formed, traveling wave energy is absorbed by internal resistance layer and external electrical resistance layer, increases the active damage of bus guide rod
Consumption, reduces the amplitude and frequency of VFTO.
7. according to the method described in claim 6, it is characterized in that, the height leads medium is symmetrically embedded in magnet ring.
8. the height leads medium and is the method according to the description of claim 7 is characterized in that the magnet ring is Ferrite Material
Molybdenum oxide.
9. according to the method described in claim 6, it is characterized in that, the internal resistance layer and external electrical resistance layer are by noninductive resistance
Buffer resistance is composed in series.
10. according to the method described in claim 9, it is characterized in that, the noninductive damping resistance by inserts or spring leaf with
Conductive rod tube electrical connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710351741.8A CN106992509B (en) | 2017-05-18 | 2017-05-18 | It is a kind of for inhibiting the laminated bus guide rod and suppressing method of VFTO |
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| CN201710351741.8A CN106992509B (en) | 2017-05-18 | 2017-05-18 | It is a kind of for inhibiting the laminated bus guide rod and suppressing method of VFTO |
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| CN106992509B true CN106992509B (en) | 2019-04-30 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108305726A (en) * | 2018-02-01 | 2018-07-20 | 清华大学 | A kind of disc insulator and preparation method thereof inhibiting function with VFTO |
| CN109100620B (en) * | 2018-06-08 | 2022-04-22 | 中国电力科学研究院有限公司 | System and method for verifying suppression effect of suppression guide wire on VFTO of GIS transformer substation |
| CN109888740B (en) * | 2019-01-23 | 2021-04-30 | 平高集团有限公司 | VFTO restraining device and GIS equipment |
| CN109672162B (en) * | 2019-01-23 | 2021-02-23 | 平高集团有限公司 | GIS equipment and VFTO suppression device thereof |
| CN113258492B (en) * | 2021-07-07 | 2021-10-01 | 华中科技大学 | Ultra-fast transient overvoltage suppression structure and gas insulated substation integrated equipment |
| CN115688661B (en) * | 2022-12-30 | 2023-03-31 | 华中科技大学 | Modeling method for full circuit parameters of spiral tube type damping bus for VFTO (very fast transient overvoltage) suppression |
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