CN106486991B - It is a kind of for inhibiting the damping bus of VFTO - Google Patents
It is a kind of for inhibiting the damping bus of VFTO Download PDFInfo
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- CN106486991B CN106486991B CN201510536818.XA CN201510536818A CN106486991B CN 106486991 B CN106486991 B CN 106486991B CN 201510536818 A CN201510536818 A CN 201510536818A CN 106486991 B CN106486991 B CN 106486991B
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- 238000013016 damping Methods 0.000 title claims abstract description 66
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 7
- 238000010891 electric arc Methods 0.000 claims description 3
- 230000006698 induction Effects 0.000 claims description 3
- 238000011161 development Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 230000006378 damage Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 241000411036 Lestes helix Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Abstract
The present invention provides a kind of for inhibiting the damping bus of VFTO, using the helix tube type damping bus that can consume electronics stream energy；The contact tube manufacture of damping bus forms helix tube at helical groove structure is opened.The present invention can inhibit the VFTO formed in GIS, its amplitude and frequency is greatly reduced, start with from primary equipment, improve the functional reliability of electronic mutual inductor used in GIS and the electrical secondary system of other state monitoring apparatus, its accident rate is reduced, is pushed using electronic mutual inductor as the foundation of the intelligent substation of representative.By way of changing bus wave impedance, increase bus active loss, inhibit the development of traveling wave, to realize the amplitude for reducing VFTO, reduces the purpose of VFTO frequency.Technical solution provided by the invention is not only suitable for the transformation to existing GIS pipeline, and is applicable in for novel GIS pipeline.
Description
Technical field
The present invention relates to a kind of control methods of operation of power networks, and in particular to a kind of for inhibiting the damping bus of VFTO.
Background technique
Gas insulated combined electrical equipment (GIS) built-in electrical insulation performance is good, and bus does not have corona loss very little, isolator operation
When, the residual charge catadioptric traveling wave easy to form on bus.This traveling wave, amplitude and frequency are all very high, referred to as quickly steep
Wave overvoltage (VFTO).VFTO upper limiting frequency up to 5MHz to 40MHz, this to GIS built-in electrical insulation supporting element, disc insulator and
Other components can generate harm, especially bigger to the harm of the transformer, reactor that are connected by oil-gas casing with GIS.
Primary equipment opposing insulation level be it is lower, GIS voltage class is higher, and there are the generated various risks that endanger to get over by VFTO
It is high.
VFTO not only endangers primary equipment, also very serious to the harm of electrical secondary system.One is moved forward in secondary weak electricity system
The case where secondary device is nearby and primary equipment is nearby mounted with a large amount of condition monitoring systems again, operation discovery, isolator operation
The overvoltage of generation is to lead to one of main reason of secondary failure, the electrical secondary system being particularly wall-mounted near primary equipment
Failure rate is very high.
VFTO is very strong to air-launched high-frequency interferencing signal by GIS outlet casing tube.Band near test platform
The electrical secondary system that electric apparatus for checking is connect, also usually breaks down.One of feature as smart grid primary equipment, electronic type
The failure rate of mutual inductor is also very high, and is frequently experienced in electrical secondary system, including front end circuit, capture card and data processing unit,
Cause crash, messy code or damage.Caused by one of important factor in order is exactly the electromagnetic interference that isolator operation generates,
Including primary equipment ground terminal caused by isolator operation, instantaneously current potential is increased.
Summary of the invention
To solve above-mentioned deficiency, the present invention provides a kind of for inhibiting the damping bus of VFTO.It can be disappeared using one section
The helix tube type of power consumption subflow energy damps bus, by way of changing bus wave impedance, increases bus active loss, inhibits
The development of traveling wave reaches the amplitude for reducing VFTO, reduces the purpose of VFTO frequency.
To achieve the above object, technical scheme is as follows:
It is a kind of for inhibiting the damping bus of VFTO, the damping bus is that helix tube type 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 slot gradually becomes smaller from outside to inside in its radial direction；
Damping resistance in parallel more than the helix tube both ends parallel connection single turn parallel connection damping resistance or two circles in parallel；
The single turn parallel connection of the damping resistance includes that the circuit of damping resistance R is in parallel with helicla flute.
The circuit containing damping resistance R are as follows: damping resistance R and residual inductance LRAfter series connection again with turn-to-turn inductance L simultaneously
The circuit of connection, the circuit after the parallel connection put the circuit in parallel after electric arc channel resistance r connects with turn-to-turn interval g and turn-to-turn interval.
The two circles more parallel includes: that 2 circles are in parallel, 3 circles are in parallel, 4 circles are in parallel or 5 circles are in parallel.
The damping resistance is the concentric of the residual inductance for increasing the mechanical strength of damping bus and reducing damping resistance
The damping resistance being mounted in damping bus contact tube.
The damping resistance of helix tube turn-to-turn parallel connection of the damping bus is by the resistance that is composed in series, the damping resistance use
Inserts or spring leaf are connect with helix tube.
The damping resistance R is adjustable R.The residual inductance LRThe number of turns and induction reactance it is square directly proportional.The spiral shell
Resistor rod is installed in coil.The resistor rod is mounted on inside helix tube along axially direction；Resistor rod is using electrical connection.
Compared with the latest prior art, technical solution provided by the invention has following excellent effect:
The present invention can inhibit the VFTO formed in GIS, its amplitude and frequency is greatly reduced, starts with from primary equipment, improve
The functional reliability of the electrical secondary system of electronic mutual inductor and other state monitoring apparatus used in GIS reduces its accident rate,
It pushes using electronic mutual inductor as the foundation of the intelligent substation of representative.
The present invention can consume the helix tube type damping bus of electronics stream energy using one section, by changing bus wave impedance
Mode, increase bus active loss, inhibit the development of traveling wave, to realize the amplitude for reducing VFTO, reduce VFTO frequency
Purpose.The design is not only suitable for being transformed existing GIS pipeline, and plays directive function to novel GIS pipe design, to old
The transformation of substation and the foundation of new substation are all significant.
The present invention is in the design and manufacture of damping bus, it is contemplated that the GIS bus system short-circuit electric current to be born is led
The fuel factor and mechanical forces of cause, it is contemplated that GIS bus current operates normally the temperature-rise effect generated, is allowed to and current electricity
Force system has good compatibility.
Detailed description of the invention
Fig. 1 is the basic circuit diagram that VFTO is formed.
Fig. 2 is that damping bus inhibits VFTO circuit diagram.
Fig. 3 is the inductance and damping resistance distribution schematic diagram for damping bus.
Fig. 4 is the damping bus pipe exterior view with helicla flute.
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: lumen；3: inserts；4: bolt；5: bus tube wall；6: insulating bar；7: connecting wire.
Specific embodiment
Present invention is further described in detail with specific embodiment with reference to the accompanying drawing:
The production principle of VFTO can be briefly described with Fig. 1.There are two sections of buses in GIS, wave impedance is respectively Z1With
Z2, the electrically charged G of difference1And G2, when switch k closes a floodgate, charge G1And G2Again it to be distributed on bus.Due to good in GIS
Insulation performance, in bus-bar charge re-allocation process, energy loss is very faint, generates traveling wave in bus both ends catadioptric and forms width
It is worth very high, frequency up to 5 to 40MHz VFTO.
In GIS, change the wave impedance of one section of bus, in the form of damping bus, i.e. inductance L parallel connection damping resistance R's
Form, traveling wave form high voltage in residual inductance section, and both ends damping resistance absorbs traveling wave energy under action of high voltage,
As shown in Figure 2.
The energy very little of VFTO itself, in transmission process, as long as increasing a small amount of active loss, so that it may reduce amplitude and frequency
Rate.The presence of inductance L increases traveling wave two-way time, i.e. reduction VFTO frequency, while improving the voltage at the end damping resistance R, makes
It obtains traveling wave charge and flows through R generation energy consumption.
The inductance L and damping resistance R for damping bus are realized with element with distributed parameters, as shown in Figure 3.LiRepresent every circle
Inductance；RiBe the damping resistance for being connected in parallel on turn-to-turn, be in series with residual inductance LRi, RiResistance value size is adjustable；g0For circle
Between gap, riElectric arc channel resistance is put for turn-to-turn interval.Due to the Mutual Inductance Coupling effect between each winding of air core inductor, remaining electricity
Feel the square directly proportional of the number of turns and the induction reactance of L.
The key structural feature of damping bus is that bus pipe spiral way is drawn hollow slots, helix tube is formed, such as Fig. 4 institute
Show.It draws hollow slots and plays discharging gap giEffect, discharge channel formed loss resistance riIt indicates.
It draws gap of the hollow slots on the inside of bus pipe to be less than close to bus pipe lateral gap, so that helix tube turn-to-turn traveling wave electricity
When breakdown between adjacent turns caused by pressing, discharge channel occurs near bus duct inner wall, reduces electric spark and flashes, it is ensured that bus pipe pair
The major insulation of the GIS pipeline body.Helix tube cross-sectional flow area S simultaneously2Not less than the cross-sectional flow area S of original bus pipe1, to protect
Demonstrate,prove through-current capability when bus operates normally.Here S1=0.5 (φ1+φ2) π, S2=0.5 × (φ1-φ3)×l.Helix tube is logical
Flow section product schematic diagram is as shown in Figure 5.
As GIS of the voltage rating equal to or less than 500kV, size cannot be manufactured and designed by original bus pipe structure
It should be greater than the damping bus of original geometric parameter, to guarantee the inductance of helix tube.The middle part of bus helix tube disposes resistor rod,
As shown in Figure 6.Effect of the resistor rod in addition to undertaking damping resistance R, will also play the supporting role of bus helix tube.Helix tube is every
Circle is electrically connected with the resistor rod for being placed in middle part using inserts electrical connection or spring leaf, and inductance electricity in parallel with a resistor is formed
Road, under traveling wave effect, because helix tube bus inductance is higher than conventional bus bar pipe, turn-to-turn forms voltage difference, between resistance and electric discharge
Traveling wave energy can be lost in gap, achieve the purpose that reduce traveling wave amplitude, reduce traveling wave frequency.
It is to be understood that the content of present invention and specific embodiment are intended to prove the reality of technical solution provided by the present invention
Border application, should not be construed as limiting the scope of the present invention.Those skilled in the art open in spirit and principles of the present invention
Give, can various modifications may be made, equivalent replacement or improve.But these changes or modification are being applied in pending protection scope.
Claims (9)
1. a kind of for inhibiting the damping bus of VFTO, it is characterised in that: the damping bus is that helix tube type 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 slot gradually becomes smaller from outside to inside in its radial direction；
Damping resistance in parallel more than the helix tube both ends parallel connection single turn parallel connection damping resistance or two circles in parallel；
The single turn parallel connection of the damping resistance includes that the circuit of damping resistance R is in parallel with helicla flute.
2. damping bus according to claim 1, it is characterised in that: the circuit of the damping resistance R are as follows: damping resistance R
With residual inductance LRCircuit in parallel with turn-to-turn inductance L again after series connection, the circuit and turn-to-turn interval g and turn-to-turn interval of the parallel connection
Circuit in parallel after putting electric arc channel resistance r series connection.
3. damping bus according to claim 1, it is characterised in that: parallel connection more than two circle includes: the parallel connection of 2 circles, 3
Circle is in parallel, 4 circles are in parallel or 5 circles are in parallel.
4. damping bus according to claim 1, it is characterised in that: the damping resistance is the machinery for increasing damping bus
Intensity and the residual inductance L for reducing damping resistanceRIt is concentric be mounted on damping bus contact tube in damping resistance.
5. damping bus according to claim 1, it is characterised in that: the resistance of the helix tube turn-to-turn parallel connection of the damping bus
By the resistance being composed in series, the damping resistance inserts or spring leaf are connect buffer resistance with helix tube.
6. damping bus according to claim 1, it is characterised in that: the damping resistance R is adjustable R.
7. damping bus according to claim 4, it is characterised in that: the residual inductance LRThe number of turns and induction reactance square
It is directly proportional.
8. damping bus according to claim 5, it is characterised in that: be equipped with resistor rod in the helix tube.
9. damping bus according to claim 8, it is characterised in that: the resistor rod is mounted on spiral along axially direction
Inside pipe；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 |
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| 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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| Publication Number | Publication Date |
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| CN106486991A CN106486991A (en) | 2017-03-08 |
| CN106486991B true CN106486991B (en) | 2019-03-08 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2390891A1 (en) * | 2010-05-24 | 2011-11-30 | ABB Technology AG | A very fast transient suppressing device |
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2015
- 2015-08-27 CN CN201510536818.XA patent/CN106486991B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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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| CN106486991A (en) | 2017-03-08 |
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