CN106486991A - A kind of damping bus for suppressing VFTO - Google Patents
A kind of damping bus for suppressing VFTO Download PDFInfo
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- CN106486991A CN106486991A CN201510536818.XA CN201510536818A CN106486991A CN 106486991 A CN106486991 A CN 106486991A CN 201510536818 A CN201510536818 A CN 201510536818A CN 106486991 A CN106486991 A CN 106486991A
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Abstract
The invention provides a kind of damping bus for suppressing VFTO, employing can consume the helix tube type damping bus of electronics stream energy；The contact tube of damping bus is manufactured into out helical groove structure, forms helix tube.The present invention can suppress the VFTO formed in GIS, its amplitude and frequency is greatly reduced, start with from primary equipment, the functional reliability of the electrical secondary system of electronic mutual inductor and other state monitoring apparatus used in raising GIS, reduce its accident rate, promote the foundation of the intelligent substation with electronic mutual inductor as representative.By way of changing bus wave impedance, increase bus active loss, suppress the development of traveling wave, so as to realize reducing the amplitude of VFTO, reduce the purpose of VFTO frequency.The technical scheme that the present invention is provided is not only suitable for the transformation to existing GIS pipeline, is suitable for for new GIS pipeline again.
Description
Technical field
The present invention relates to a kind of control method of operation of power networks, and in particular to a kind of damping for suppressing VFTO
Bus.
Background technology
Gas insulated combined electrical equipment (GIS) built-in electrical insulation performance is good, and bus does not have corona loss very little, isolation
During switching manipulation, the residual charge on bus easily forms catadioptric traveling wave.This traveling wave, amplitude and frequency
All very high, referred to as quick steep wave overvoltage (VFTO).VFTO upper limiting frequency up to 5MHz to 40MHz,
This can produce harm to GIS built-in electrical insulation support member, disc insulator and other parts, particularly to by oil
The transformer that gas bushing is connected with GIS, the harm of reactor are bigger.Primary equipment opposing insulation level be relatively
Low, GIS electric pressure is higher, and it is higher that VFTO has produced various harm risks.
VFTO not only endangers primary equipment, and the harm to electrical secondary system is also very serious.Before secondary weak electricity system
Move to primary equipment nearby and near primary equipment, be mounted with the situation of a large amount of condition monitoring systems again, operation is sent out
Existing, the overvoltage that isolator operation is produced, it is to cause one of main reason of secondary failure, particularly pacifies
The electrical secondary system fault rate being mounted near primary equipment is very high.
VFTO is very strong to air-launched high-frequency interferencing signal by GIS outlet casing tube.Test platform is attached
The electrical secondary system connect by near powered apparatus for checking, also usually breaks down.As intelligent grid primary equipment
One of feature, the fault rate of electronic mutual inductor is also very high, and is frequently experienced in electrical secondary system, including front
Circuits, capture card and data processing unit, cause deadlock, mess code or damage.One of material impact
Factor is exactly that the electromagnetic interference of isolator operation generation is caused, and causes once including isolator operation
Instantaneously current potential is raised at equipment ground end.
Content of the invention
For solving above-mentioned deficiency, the invention provides a kind of damping bus for suppressing VFTO.Using one
Section can consume the helix tube type damping bus of electronics stream energy, by way of changing bus wave impedance, increase
Plus bus active loss, suppress the development of traveling wave, the amplitude of VFTO is reduced, reduce VFTO frequency
Purpose.
For achieving the above object, technical scheme is as follows：
A kind of damping bus for suppressing VFTO, the damping bus damp bus for helix tube type；
The contact tube of the damping bus is the helix tube of helical groove structure；
Interval between the helicla flute is equal, and the width of groove is radially tapered into from outside to inside at which；
The damping electricity of parallel connection more than the helix tube two ends parallel connection single turn parallel connection damping resistance or two circle in parallel
Resistance；
The single turn of the damping resistance circuit for including damping resistance R in parallel is in parallel with helicla flute.
The circuit containing damping resistance R is：Damping resistance R and residual inductance LRAfter series connection again with turn-to-turn
Inductance L circuit in parallel, the circuit after the parallel connection put electric arc channel resistance r with turn-to-turn interval g and turn-to-turn interval
Circuit in parallel after series connection.
The two circles more parallel includes：2 circles are in parallel, 3 circles are in parallel, in parallel or 5 circles of 4 circles are in parallel.
The damping resistance is that increase damps the mechanical strength of bus and reduces the same of the residual inductance of damping resistance
Damping resistance of the axle center in damping bus contact tube.
The damping resistance of the helix tube turn-to-turn parallel connection of the damping bus is by the resistance being composed in series, the damping
Resistance inserts or spring leaf are connected with helix tube.
The damping resistance R is for can adjust R.The residual inductance LRSquare being directly proportional of the number of turn and induction reactance.
Resistor rod is installed in the helix tube.Resistor rod direction vertically is inside helix tube；Electricity
Resistance rod is using electrical connection.
With immediate prior art ratio, the present invention provide technical scheme there is following excellent effect：
The present invention can suppress the VFTO formed in GIS, its amplitude and frequency is greatly reduced, enters from primary equipment
Hand, the electronic mutual inductor used in raising GIS and the reliable operation of the electrical secondary system of other state monitoring apparatus
Property, reduce its accident rate, promote the foundation of the intelligent substation with electronic mutual inductor as representative.
The present invention damps bus using one section of helix tube type that can consume electronics stream energy, by changing bus
The mode of wave impedance, increases bus active loss, suppresses the development of traveling wave, so as to realize reducing the width of VFTO
Value, reduces the purpose of VFTO frequency.The design is not only suitable for transforming existing GIS pipeline, and to new
Type GIS pipe design plays directive function, and the transformation to old transformer station and the foundation of new transformer station have important meaning
Justice.
The present invention is in the design and manufacture of damping bus, it is contemplated that GIS bus system short-circuit to be born
Fuel factor and mechanical forces that electric current causes, it is contemplated that GIS bus current normally runs the temperature rise effect of generation
Should, it is allowed to, with current power system, there is good compatibility.
Description of the drawings
The basic circuit diagram that Fig. 1 is formed for VFTO.
Fig. 2 is damping bus suppression VFTO circuit diagram.
Fig. 3 is inductance and the damping resistance distribution schematic diagram for damping bus.
Fig. 4 is band spiral fluted damping bus pipe exterior view.
Fig. 5 is the transverse cross-sectional view of Fig. 4.
Fig. 6 is helix tube cross-sectional flow area schematic diagram.
Fig. 7 is bus helix tube resistor rod scheme of installation.
Wherein, 1：Tube wall；2：Tube chamber；3：Inserts；4：Bolt；5：Bus tube wall；6：Insulating bar；
7：Connecting wire.
Specific embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings：
The generation principle of VFTO, can be briefly described with Fig. 1.There are two sections of buses, wave impedance in GIS
Respectively Z1And Z2, the electrically charged G of difference1And G2, when k combined floodgate is switched, electric charge G1And G2Again to exist
Distribute on bus.Due to good insulating properties in GIS, in bus-bar charge re-allocation process, energy loss
Very faint, produce traveling wave and form, in bus two ends catadioptric, the VFTO that amplitude is very high, frequency reaches 5 to 40MHz.
In GIS, change the wave impedance of one section of bus, in the form of damping bus, i.e. inductance L damping in parallel
The form of resistance R, traveling wave form high voltage in residual inductance section, and its two ends damping resistance is made in high voltage
Traveling wave energy is absorbed with getting off, as shown in Figure 2.
The energy very little of VFTO itself, in transmitting procedure, as long as increase a small amount of active loss, so that it may reduce width
Value and frequency.The presence of inductance L, increased traveling wave two-way time, that is, reduce VFTO frequency, while improving
The voltage at damping resistance R end so that traveling wave electric charge flows through R and produces energy consumption.
The inductance L and damping resistance R of damping bus is realized with element with distributed parameters, as shown in Figure 3.Li
Represent the inductance value per circle；RiBe the damping resistance for being connected in parallel on turn-to-turn, be in series with residual inductance LRi, RiResistance
Size can be adjusted；g0For turn-to-turn interval, riElectric arc channel resistance is put for turn-to-turn interval.Due to air core inductor each
Mutual Inductance Coupling effect between winding, square being directly proportional of the number of turn of residual inductance L and induction reactance.
The key structural feature of damping bus is that bus pipe spiral way is drawn hollow slots, forms helix tube,
As shown in Figure 4.Draw hollow slots and play discharging gap giEffect, discharge channel formed loss resistance ri
Represent.
Hollow slots are drawn by the gap on the inside of bus pipe less than near bus pipe lateral gap so that helix tube turn-to-turn
During the breakdown between adjacent turns that traveling wave voltage causes, discharge channel occurs, near bus duct inwall, to reduce electric spark
Flash, it is ensured that major insulation of the bus pipe to the GIS pipeline body.While helix tube cross-sectional flow area S2It is not less than
Original cross-sectional flow area S of bus pipe1, to ensure through-current capability when bus normally runs.Here S1=0.5 (φ1+φ2) π, S2=0.5 × (φ1-φ3)×l.Helix tube cross-sectional flow area schematic diagram is as shown in Figure 5.
When rated voltage is equal to or less than the GIS of 500kV, it is impossible to by original bus tubular construction, design system
The damping bus that size should be greater than original geometric parameter is made, to ensure the inductance value of helix tube.Bus helix tube
Middle part placement resistor rod, as shown in Figure 6.Resistor rod will be also risen except undertaking the effect of damping resistance R
Supporting role to bus helix tube.Helix tube is electrically connected using inserts with the resistor rod for being placed in middle part per circle
Connect or spring leaf electrical connection, inductance circuit in parallel with a resistor is formed, under traveling wave effect, because helix tube is female
Line inductance value is higher than conventional bus bar pipe, and turn-to-turn forms voltage difference, and resistance and discharging gap can all be lost traveling wave energy
Amount, reduces traveling wave amplitude, reduces the purpose of traveling wave frequency.
It is to be understood that, present invention and specific embodiment are intended to prove technical side provided by the present invention
The practical application of case, should not be construed as limiting the scope of the present invention.Those skilled in the art are at this
Under bright spirit and principle are inspired, can various modifications may be made, equivalent or improve.But these change or repair
Change and all applying in pending protection domain.
Claims (9)
1. a kind of damping bus for suppressing VFTO, it is characterised in that：The damping bus is helix tube
Formula damps bus；
The contact tube of the damping bus is the helix tube of helical groove structure；
Interval between the helicla flute is equal, and the width of groove is radially tapered into from outside to inside at which；
The damping electricity of parallel connection more than the helix tube two ends parallel connection single turn parallel connection damping resistance or two circle in parallel
Resistance；
The single turn of the damping resistance circuit for including damping resistance R in parallel is in parallel with helicla flute.
2. damping bus according to claim 1, it is characterised in that：Described containing damping resistance R's
Circuit is：Damping resistance R and residual inductance LRCircuit in parallel with turn-to-turn inductance L again after series connection, described simultaneously
Circuit after connection puts the circuit in parallel after electric arc channel resistance r connects with turn-to-turn interval g and turn-to-turn interval.
3. damping bus according to claim 1, it is characterised in that：The two circles more parallel includes：
2 circles are in parallel, 3 circles are in parallel, in parallel or 5 circles of 4 circles are in parallel.
4. damping bus according to claim 1, it is characterised in that：The damping resistance is for increasing resistance
The mechanical strength of Buddhist nun's bus and reduce damping resistance residual inductance concentric installed in damping bus contact tube
Interior damping resistance.
5. damping bus according to claim 1, it is characterised in that：The helix tube of the damping bus
Turn-to-turn damping resistance in parallel is by the resistance being composed in series, the damping resistance inserts or spring leaf and spiral
Pipe connects.
6. damping bus according to claim 1, it is characterised in that：The damping resistance R is adjustable
Section R.
7. damping bus according to claim 4, it is characterised in that：The residual inductance LRThe number of turn
To square being directly proportional for induction reactance.
8. damping bus according to claim 5, it is characterised in that：Electricity is installed in the helix tube
Resistance rod.
9. damping bus according to claim 8, it is characterised in that：Resistor rod side vertically
To inside helix tube；Resistor rod is using electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510536818.XA CN106486991B (en) | 2015-08-27 | 2015-08-27 | It is a kind of for inhibiting the damping bus of VFTO |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510536818.XA CN106486991B (en) | 2015-08-27 | 2015-08-27 | It is a kind of for inhibiting the damping bus of VFTO |
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|---|---|
| CN106486991A true CN106486991A (en) | 2017-03-08 |
| CN106486991B CN106486991B (en) | 2019-03-08 |
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| CN201510536818.XA Active CN106486991B (en) | 2015-08-27 | 2015-08-27 | It is a kind of for inhibiting the damping bus of VFTO |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109100620A (en) * | 2018-06-08 | 2018-12-28 | 中国电力科学研究院有限公司 | A kind of verify inhibits conducting wire to the system and method for GIS substation VFTO inhibitory effect |
| CN109888740A (en) * | 2019-01-23 | 2019-06-14 | 平高集团有限公司 | A kind of VFTO inhibits device and GIS device |
| CN113258492A (en) * | 2021-07-07 | 2021-08-13 | 华中科技大学 | Ultra-fast transient overvoltage suppression structure and gas insulated substation integrated equipment |
| CN115688661A (en) * | 2022-12-30 | 2023-02-03 | 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 |
| CN116663435A (en) * | 2023-08-01 | 2023-08-29 | 华中科技大学 | Damping bus structure parameter optimization method, damping bus structure parameter optimization device and storage medium |
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| US3631323A (en) * | 1970-06-09 | 1971-12-28 | Ralph R Pittman | Surge-modifying lightning arrester construction |
| CN102832562A (en) * | 2012-08-23 | 2012-12-19 | 云南电力试验研究院（集团）有限公司电力研究院 | Leak resistance for eliminating GIS VFTO (Gas Insulated Switchgear Very Fast Transient Overvoltage) residual charge |
| US20130063855A1 (en) * | 2010-05-24 | 2013-03-14 | Dariusz Smugala | Very fast transient suppressing device |
| CN103969486A (en) * | 2014-04-30 | 2014-08-06 | 国家电网公司 | Grading ring for limiting transient voltage and current of capacitor voltage transformer |
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2015
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3631323A (en) * | 1970-06-09 | 1971-12-28 | Ralph R Pittman | Surge-modifying lightning arrester construction |
| US20130063855A1 (en) * | 2010-05-24 | 2013-03-14 | Dariusz Smugala | Very fast transient suppressing device |
| CN102832562A (en) * | 2012-08-23 | 2012-12-19 | 云南电力试验研究院（集团）有限公司电力研究院 | Leak resistance for eliminating GIS VFTO (Gas Insulated Switchgear Very Fast Transient Overvoltage) residual charge |
| CN103969486A (en) * | 2014-04-30 | 2014-08-06 | 国家电网公司 | Grading ring for limiting transient voltage and current of capacitor voltage transformer |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106992509B (en) * | 2017-05-18 | 2019-04-30 | 中国电力科学研究院 | It is a kind of for inhibiting the laminated bus guide rod and suppressing method of 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 |
| CN108923342B (en) * | 2018-05-28 | 2021-11-02 | 中国电力科学研究院有限公司 | GIS outlet sleeve with damping function |
| CN109100620A (en) * | 2018-06-08 | 2018-12-28 | 中国电力科学研究院有限公司 | A kind of verify inhibits conducting wire to the system and method for GIS substation VFTO inhibitory effect |
| 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 |
| CN109888740A (en) * | 2019-01-23 | 2019-06-14 | 平高集团有限公司 | A kind of VFTO inhibits device and GIS device |
| CN113258492A (en) * | 2021-07-07 | 2021-08-13 | 华中科技大学 | Ultra-fast transient overvoltage suppression structure and gas insulated substation integrated equipment |
| CN115688661A (en) * | 2022-12-30 | 2023-02-03 | 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 |
| CN116663435A (en) * | 2023-08-01 | 2023-08-29 | 华中科技大学 | Damping bus structure parameter optimization method, damping bus structure parameter optimization device and storage medium |
| CN116663435B (en) * | 2023-08-01 | 2023-10-20 | 华中科技大学 | Damping bus structure parameter optimization method, damping bus structure parameter optimization device and storage medium |
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| CN106486991B (en) | 2019-03-08 |
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