CN1258923A - Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance - Google Patents
Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance Download PDFInfo
- Publication number
- CN1258923A CN1258923A CN 00100552 CN00100552A CN1258923A CN 1258923 A CN1258923 A CN 1258923A CN 00100552 CN00100552 CN 00100552 CN 00100552 A CN00100552 A CN 00100552A CN 1258923 A CN1258923 A CN 1258923A
- Authority
- CN
- China
- Prior art keywords
- magnet ring
- fast transient
- gis
- transient overvoltage
- vfto
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000001052 transient effect Effects 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 17
- 239000000463 material Substances 0.000 claims description 13
- 230000005764 inhibitory process Effects 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000013016 damping Methods 0.000 claims description 4
- 238000011160 research Methods 0.000 abstract description 3
- 229910000976 Electrical steel Inorganic materials 0.000 abstract description 2
- 229910000889 permalloy Inorganic materials 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 12
- 239000011324 bead Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000009413 insulation Methods 0.000 description 7
- 239000004020 conductor Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 230000035699 permeability Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000006698 induction Effects 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910018503 SF6 Inorganic materials 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 3
- 229910052753 mercury Inorganic materials 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 3
- 229960000909 sulfur hexafluoride Drugs 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000005684 electric field Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 241000208199 Buxus sempervirens Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Circuit Breakers (AREA)
- Gas-Insulated Switchgears (AREA)
- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The present invention relates to the research of very fast transient overvoltage for completely enclosed combined electrical appliance. The method is that inside one completely enclosed combined electrical appliance and in one place or several places of conducting pole, through which traveling wave passes, sleeve of magnetic ring(s) is applied to alter and damp the transmission of traveling wave. The magnetic ring is made of ferrite preferably or silicon steel, permalloy, etc. The simple method can reduce the amplitude and gradient of the very fast transient overvoltage.
Description
The invention belongs to the research field of the very fast transient overvoltage of fully closed combined electric unit, particularly suppress the method for very fast transient overvoltage.
The English name of fully closed combined electric unit is Gas Insulated Substation, is called for short GIS, to call GIS in the following text.
GIS is a large-scale substation equipment.Its basic structure is: power equipments such as substation bus bar, circuit breaker, isolating switch, lightning arrester, instrument transformer are sealed in the metallic conduit of ground connection, fill sulfur hexafluoride gas with high insulation resistance, significantly reducing insulation distance, thereby reduce the volume of power equipment and the institute of transformer station takes up space.The metallic conduit of GIS is a cylindrical shape, and two kinds of structures of three-phase branch mailbox and three-phase combined type are arranged.The three-phase branch mailbox as shown in Figure 1, A, B, C three-phase high-voltage conductor 11 are sealed in respectively in separately the pipeline 12, fill the sulfur hexafluoride gas 13 with high insulation resistance in the metallic conduit, high-pressure conductor and ground conduit are coaxial configuration.Three-phase combined type as shown in Figure 2, A, B, C three-phase high-voltage conductor 21 are sealed in the same pipeline 22, fill the sulfur hexafluoride gas 23 with high insulation resistance in the metallic conduit, A, B, C three-phase are triangular arrangement.The higher GIS of electric pressure generally adopts the structure of three-phase branch mailbox.
The English name of the very fast transient overvoltage of GIS is Very Fast Transient Overvoltage, is called for short VFTO or VFT, to call VFTO in the following text.
The mechanism of production of VFTO is: when the isolating switch among the GIS or circuit breaker suit unloaded bus (or nonloaded line), (be continuous puncture, extinguish, puncture, extinguish) will take place repeatedly to puncture in the fracture of isolating switch or circuit breaker in suiting process, puncture each time and all produce a very steep capable ripple, on unloaded bus or nonloaded line, propagate and catadioptric back and forth, form very fast transient voltage.Puncture voltage when the switch fracture punctures is high more, and the row wave amplitude is then big more, and the amplitude of very fast transient voltage is also big more.Because therefore the rated voltage when above-mentioned very fast transient voltage normally moves above GIS usually is called very fast transient overvoltage.For the GIS of three-phase branch mailbox and three-phase combined type, the mechanism of production of VFTO is identical with process.
In some occasions, the VFTO of GIS can reach very high amplitude and steepness, and for example, amplitude can reach the several times of GIS working voltage.The VFTO of GIS has constituted serious threat to GIS self with insulation neighboring device.Especially the higher transformer station of electric pressure (for example 500kV and more than), apparatus insulated nargin is relatively low, and the harm of VFTO is bigger.
The size of VFTO under the different application occasion of measurements and calculations GIS, amplitude and the steepness of inhibition VFTO are the major issues that relates generally in GIS research, manufacturing and the use.
Aspect the amplitude and steepness that suppress VFTO, following method is arranged at present:
1, uses lightning arrester, the amplitude of restriction VFTO.Lightning arrester can arrive certain level to the amplitude limitation of VFTO, but can not limit its steepness effectively, and the certain protection scope is arranged.The cost of lightning arrester is higher.
2, use the quick acting isolating switch, the time that suits of isolating switch is reduced in several power frequency cycles, thus the number of times that reduces to puncture repeatedly.The method can not be eliminated the threat of VFTO fully.
3,, reduce the voltage at fracture two ends, thereby reduce the number of times that punctures repeatedly and reduce puncture voltage in the fracture two ends of isolating switch parallel resistance.The method can effectively suppress VFTO, and still, resistance can not fixedly be connected in parallel on switch ends, when finish suit operation after, resistance must be withdrawn, this makes operating mechanism very complicated, thereby makes that its practicality is had a strong impact on.
The objective of the invention is to propose a kind of method that suppresses the fully closed combined electric unit very fast transient overvoltage for overcoming the existing methods weak point, this method is not only implemented simply, and can reduce amplitude and the steepness of VFTO effectively.
A kind of method that suppresses the fully closed combined electric unit very fast transient overvoltage that the present invention proposes, it is characterized in that, a place or plurality of positions on the conducting rod of the expert ripple process of the metallic conduit of fully closed combined electric unit put the magnet ring that one or more magnetic materials are made, in order to change and the wave propagation of damping row.Implementation method is to put one group of magnet ring on the conducting rod near isolating switch or circuit breaker preferably.This magnet ring is preferably selected the magnetic material that high frequency response characteristic is better, magnetic permeability is higher and saturation induction density is higher, and magnetic material comprises ferrite, silicon steel, permalloy etc., and the magnet ring material is a ferrite preferably.
Ferrite is a kind of magnetic material, has high frequency characteristics preferably, is widely used in high-frequency circuit.Ferrite Material has parameters such as different magnetic permeabilitys, frequency response characteristic and saturation induction density, has the Ferrite Material of ready-made various characteristics parameter selective.
Fig. 3 is the circuit of an analogue test of demonstration effect of the present invention.Dividing bus and the shell of box GIS, the interior diameter D that wherein simulates shell 31 with one 3.5 meters long coaxial conductors simulation three-phase is that 46 millimeters, the diameter d of analog bus 32 are 14 millimeters.Intend the puncture of switch fracture in the GIS with the pass matched moulds of mercury combustion switch 33, mercury combustion switch has than the pass of similar puncture faster and closes characteristic, can produce steep capable ripple.Power supply with a capacitor C simulation GIS.Electric capacity is filled with behind the positive direct voltage, close and close mercury combustion switch, then produce a positive capable ripple and propagate to bus bar terminal B from bus head end A.At bus bar terminal B, bus is opened a way over the ground, and the wave impedance infinity produces positive total reflection to the row ripple, passes bus head end A thereby produce a positive capable ripple back from bus bar terminal B, and is superimposed upon on the existing capable ripple.At bus head end A, the high-frequency resistance of electric capacity is zero, and the capable ripple of passing back is produced negative total reflection, from and produce a negative capable ripple and pass to bus bar terminal B from bus head end A, this is born and goes ripple and also be superimposed upon on the existing capable ripple.According to this repeatedly, produce the very fast transient voltage of a vibration on bus, its maximum amplitude is the twice of electric capacity charging voltage.
When Figure 4 shows that above-mentioned analogue test without any magnet ring, the oscillogram of the very fast transient voltage at the B place, bus bar terminal position that test records, among the figure, voltage: 10V/div; Time: 20ns/div.Because the catadioptric back and forth of row ripple, very fast transient voltage is an oscillatory process, its frequency of oscillation depends on capable velocity of wave propagation (the row velocity of wave propagation is the light velocity in the air dielectric) and propagates a distance back and forth that the amplitude of oscillating voltage approaches the twice of electric capacity charging voltage.
Further test is to lay ferrite bead 34 at bus head end position A, and magnet ring is of a size of 20 millimeters of interior diameters, 35 millimeters of overall diameters, and 80 millimeters of axial lengths, the relative permeability of magnet ring material are 1000, and response frequency is higher than 10 megahertzes.Shown in Figure 5 is the oscillogram of the very fast transient voltage that measures at B place, bus bar terminal position when magnet ring is arranged, and this moment, the vibration of voltage almost disappeared, and voltage max approaches the charging voltage of electric capacity.This shows that ferrite bead has limited effectively with damping very fast transient voltage.The production process of the VFTO of GIS is identical with above-mentioned analogue test, adopts ferrite bead that the effect of similar inhibition VFTO also can be arranged in GIS.
The mechanism that magnet ring suppresses VFTO has the following aspects:
1, magnet ring is enclosed within on the conducting rod, has increased the inductance of local conducting rod.Be enclosed within when magnet ring on the conducting rod of switch incision position, be equivalent to the inductance of between switch fracture and unloaded bus, having connected, limited the amplitude and the steepness of capable wave-wave head, thereby reduced VFTO.
2, magnet ring can change the wave impedance of the conducting rod of the position of putting, and the row ripple is when propagating into this position, because catadioptric will take place in the change of wave impedance.Therefore, magnet ring can influence the Energy distribution of capable ripple and the additive process of row ripple, thereby influences VFTO.
3, the magnet ring energy of capable ripple that can be coupled, and produce loss, thus can reduce the energy of row ripple, damping VFTO.
It is relevant that magnet ring suppresses the physical dimension of the material of riding position, magnet ring of effect and magnet ring of VFTO of GIS and magnet ring, below is the explanation to these problems.
1, the riding position of magnet ring.Magnet ring is laid in place in any capable ripple process, and the effect that suppresses VFTO is all arranged.Yet different riding positions has different inhibition effects.Make magnet ring as far as possible near the switch fracture, can suppress capable wave amplitude and steepness on the whole bus, have best inhibition effect.
2, the selection of magnet ring material.The magnet ring material has the isoparametric difference of frequency response characteristic, magnetic permeability and saturation induction density.VFTO with magnet ring inhibition GIS should select the material that high frequency response characteristic is better, magnetic permeability is higher and saturation induction density is higher as far as possible.In actual applications, can select ready-made Ferrite Material.
3, the physical dimension of magnet ring.In actual applications, the size of magnet ring is subjected to the restriction of space and insulation, and that can not design is very big, is advisable can effectively suppressing VFTO.The physical dimension of magnet ring can be selected as follows: (1) magnet ring can be in high potential position, closely is enclosed within on the conducting rod of GIS, and promptly the radius of the inside radius of magnet ring and conducting rod is identical.(2) magnet ring can also be on the earth potential, and promptly the inside radius of the metallic conduit of the outer radius of magnet ring and GIS is identical.(3) selection poor, the wall thickness of magnet ring just of the interior outer radius of magnet ring is advisable can reasonably realize insulating Design.(4) axial dimension of single magnet ring is programmable smaller, is chosen in tens millimeter and gets final product.Select magnet ring to stack number according to concrete needs, can change the axial length of magnet ring neatly.(5) the magnet ring material is generally conductor, and the edge designs of magnet ring should be in the arc-shaped, helps uniform electric field.
The conducting rod of GIS needs long-term by big power current.Magnet ring is very little to the power frequency impedance influence of conducting rod, does not influence the characteristic of the big electric current of conducting rod conduction power frequency.
When the big electric current of power frequency, whether magnet ring can be owing to magnetic hysteresis and eddy current loss and temperature is too high at conducting rod, has carried out analogue test for this reason.Use the ferrite bead in the above-mentioned analogue test, by 1000 amperes of power currents (magnitude of GIS actual motion electric current), 10 minutes function of current time, significant temperature rise does not appear in magnet ring on the magnet ring inner wire.This test shows that under the big current conditions of power frequency, ferrite bead does not have serious loss and heating problem.
Brief Description Of Drawings:
The GIS structural representation that Fig. 1 is box for three-phase divides.
Fig. 2 is the GIS structural representation of Threephase common-box.
Fig. 3 suppresses the simulation experiment circuit schematic diagram of the VFTO of GIS for ferrite bead.
Fig. 4 is the very fast transient voltage oscillogram at B place, position when not laying magnet ring in the analogue test.
Fig. 5 is the oscillogram of the very fast transient voltage that measures at B place, bus bar terminal position in the analogue test when position A lays ferrite bead.
Fig. 6 is the embodiment that ferrite bead is installed in the isolating switch of actual GIS
A kind of embodiment of the present invention as shown in Figure 6.Be the isolating switch 61 that the three-phase of a kind of 110kV divides box GIS shown in the figure, the miscellaneous part by flange 62 and GIS links to each other.Isolating switch has a fracture 63 and a built-in contact 64, controls the axial motion of built-in contact by operating mechanism, realizes the He Guanhe that cut-offs of fracture.The diameter d of conducting rod 65 is 80 millimeters, and the interior diameter D of GIS shell 66 is 300 millimeters.On the conducting rod 65 of isolating switch one end, put one group of ferrite bead 67.The selection of magnet ring material characteristic parameter can also can be determined the more characterisitic parameter of optimization by test with reference to the used magnet ring material of above-mentioned analogue test.The radial thickness T of magnet ring is chosen as tens millimeter, and the length H of single magnet ring is chosen as 50 millimeter, and the number of magnet ring can be determined flexibly, reaches desirable effect and gets final product.
Magnet ring makes the diameter of high-voltage part of isolating switch increase, and insulation distance reduces, and can suitably increase the housing diameter of one section of GIS isolating switch for this reason, is easy to realize insulating Design by electric Field Calculation.
Claims (3)
1. method that suppresses the fully closed combined electric unit very fast transient overvoltage, it is characterized in that, the magnet ring group that a place on the conducting rod of the expert ripple process of fully closed combined electric unit or plurality of positions put a magnet ring or be made of a plurality of magnet rings is in order to change and the wave propagation of damping row.
2. the method for inhibition fully closed combined electric unit very fast transient overvoltage as claimed in claim 1 is characterized in that, puts one group of magnet ring on the conducting rod near isolating switch or place, disconnected device two ends.
3. the method for inhibition fully closed combined electric unit very fast transient overvoltage as claimed in claim 1 is characterized in that, said magnet ring adopts Ferrite Material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001005529A CN1136596C (en) | 2000-01-25 | 2000-01-25 | Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance |
| JP2001016389A JP2001251713A (en) | 2000-01-25 | 2001-01-24 | Gas insulated substation, and method for suppressing steep wave surge in gas insulated substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001005529A CN1136596C (en) | 2000-01-25 | 2000-01-25 | Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1258923A true CN1258923A (en) | 2000-07-05 |
| CN1136596C CN1136596C (en) | 2004-01-28 |
Family
ID=4575525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001005529A Expired - Fee Related CN1136596C (en) | 2000-01-25 | 2000-01-25 | Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2001251713A (en) |
| CN (1) | CN1136596C (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799488B (en) * | 2010-02-23 | 2011-12-21 | 清华大学 | Device and method for generating nominal voltage |
| WO2011157048A1 (en) * | 2010-06-17 | 2011-12-22 | 中国电力科学研究院 | Generation device for very fast transient overvoltage |
| CN103236684A (en) * | 2013-04-17 | 2013-08-07 | 清华大学 | High-frequency magnet ring device for restraining very fast transient overvoltage |
| EP2731213A1 (en) | 2012-11-12 | 2014-05-14 | ABB Technology AG | A method for controlling arc ignition in the intercontact break of a disconnector during the operation of opening and closing the disconnector |
| EP2733808A1 (en) | 2012-11-16 | 2014-05-21 | ABB Technology AG | Method and system for suppressing very fast transients |
| CN103941166A (en) * | 2014-04-23 | 2014-07-23 | 沈阳工业大学 | High-temperature gas breakdown characteristic detection device and method under VFTO condition |
| 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 |
| CN106972396A (en) * | 2017-03-20 | 2017-07-21 | 平高集团有限公司 | VFTO restraining devices, damping bus unit, bus and GIS |
| CN106992510A (en) * | 2017-05-25 | 2017-07-28 | 云南电网有限责任公司电力科学研究院 | Suppress the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
| CN107068457A (en) * | 2017-05-12 | 2017-08-18 | 平高集团有限公司 | It is a kind of to carry the switch that VFTO suppresses function |
| CN109738686A (en) * | 2019-03-14 | 2019-05-10 | 广东电网有限责任公司 | A kind of electrical power system transient overvoltage quick discrimination method and device |
| CN110911214A (en) * | 2018-09-14 | 2020-03-24 | 平高集团有限公司 | Isolating switch capable of inhibiting VFTO and moving contact thereof |
| CN113471947A (en) * | 2021-07-27 | 2021-10-01 | 中国电力工程顾问集团西北电力设计院有限公司 | Active suppression method and system for very fast transient overvoltage of GIS |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102832562B (en) * | 2012-08-23 | 2015-10-28 | 云南电力试验研究院（集团）有限公司电力研究院 | A kind of bleeder resistance system eliminating GISVFTO residual charge |
| CN102998556B (en) * | 2012-10-29 | 2016-02-24 | 中国电力科学研究院 | The very fast transient overvoltage simulator of metal oxide pressure-limiting device and method thereof |
| CN103105521A (en) * | 2013-01-29 | 2013-05-15 | 华北电力大学 | Very fast transient overvoltage (VFTO) remote measurement system and method |
| CN108898189B (en) * | 2018-07-11 | 2021-05-25 | 云南电网有限责任公司电力科学研究院 | Method and system for establishing fingerprint database of VFTO measurement data |
| CN109143141B (en) * | 2018-08-27 | 2020-09-01 | 云南电网有限责任公司电力科学研究院 | VFTO test system and method for detecting reliability of online monitoring system |
| 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 |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61254011A (en) * | 1985-05-02 | 1986-11-11 | 株式会社日立製作所 | Gas insulated switchgear |
| JPH027810A (en) * | 1988-06-24 | 1990-01-11 | Nissin Electric Co Ltd | Compressed-gas-insulated switchgear |
| JP2762654B2 (en) * | 1990-02-13 | 1998-06-04 | 日新電機株式会社 | Gas insulated switchgear |
| JPH0950907A (en) * | 1995-08-04 | 1997-02-18 | Hitachi Metals Ltd | Magnetic core for gas-insulated switch |
| JPH0970115A (en) * | 1995-08-31 | 1997-03-11 | Mitsubishi Electric Corp | Bushing for transformer |
| JP2000021275A (en) * | 1998-06-30 | 2000-01-21 | Hitachi Ltd | Gas insulated appliance |
-
2000
- 2000-01-25 CN CNB001005529A patent/CN1136596C/en not_active Expired - Fee Related
-
2001
- 2001-01-24 JP JP2001016389A patent/JP2001251713A/en active Pending
Cited By (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101799488B (en) * | 2010-02-23 | 2011-12-21 | 清华大学 | Device and method for generating nominal voltage |
| WO2011157048A1 (en) * | 2010-06-17 | 2011-12-22 | 中国电力科学研究院 | Generation device for very fast transient overvoltage |
| EP2731213A1 (en) | 2012-11-12 | 2014-05-14 | ABB Technology AG | A method for controlling arc ignition in the intercontact break of a disconnector during the operation of opening and closing the disconnector |
| WO2014072027A1 (en) | 2012-11-12 | 2014-05-15 | Abb Technology Ag | A method for controlling arc ignition in the intercontact break of a disconnector during the operation of opening and closing the disconnector |
| EP2733808A1 (en) | 2012-11-16 | 2014-05-21 | ABB Technology AG | Method and system for suppressing very fast transients |
| CN103236684A (en) * | 2013-04-17 | 2013-08-07 | 清华大学 | High-frequency magnet ring device for restraining very fast transient overvoltage |
| CN103236684B (en) * | 2013-04-17 | 2015-10-28 | 清华大学 | Suppress the high-frequency magnetic device of very fast transient overvoltage |
| CN103941166B (en) * | 2014-04-23 | 2016-07-06 | 沈阳工业大学 | High-temperature gas breakdown characteristics detecting device and method under a kind of VFTO |
| CN103941166A (en) * | 2014-04-23 | 2014-07-23 | 沈阳工业大学 | High-temperature gas breakdown characteristic detection device and method under VFTO condition |
| CN103969486B (en) * | 2014-04-30 | 2017-02-22 | 国家电网公司 | Grading ring for limiting transient voltage and current of capacitor voltage transformer |
| 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 |
| CN106972396A (en) * | 2017-03-20 | 2017-07-21 | 平高集团有限公司 | VFTO restraining devices, damping bus unit, bus and GIS |
| CN107068457A (en) * | 2017-05-12 | 2017-08-18 | 平高集团有限公司 | It is a kind of to carry the switch that VFTO suppresses function |
| CN107068457B (en) * | 2017-05-12 | 2019-08-13 | 平高集团有限公司 | A kind of included VFTO inhibits the switch of function |
| CN106992510A (en) * | 2017-05-25 | 2017-07-28 | 云南电网有限责任公司电力科学研究院 | Suppress the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
| CN106992510B (en) * | 2017-05-25 | 2019-10-15 | 云南电网有限责任公司电力科学研究院 | Inhibit the magnetic ring device of very fast transient overvoltage in gas-insulated switchgear |
| CN110911214A (en) * | 2018-09-14 | 2020-03-24 | 平高集团有限公司 | Isolating switch capable of inhibiting VFTO and moving contact thereof |
| CN110911214B (en) * | 2018-09-14 | 2021-12-10 | 平高集团有限公司 | Isolating switch capable of inhibiting VFTO and moving contact thereof |
| CN109738686A (en) * | 2019-03-14 | 2019-05-10 | 广东电网有限责任公司 | A kind of electrical power system transient overvoltage quick discrimination method and device |
| CN109738686B (en) * | 2019-03-14 | 2020-11-10 | 广东电网有限责任公司 | Method and device for quickly judging transient overvoltage of power system |
| CN113471947A (en) * | 2021-07-27 | 2021-10-01 | 中国电力工程顾问集团西北电力设计院有限公司 | Active suppression method and system for very fast transient overvoltage of GIS |
| CN113471947B (en) * | 2021-07-27 | 2023-06-13 | 中国电力工程顾问集团西北电力设计院有限公司 | Active suppression method and system for GIS (gas insulated switchgear) ultra-fast transient overvoltage |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2001251713A (en) | 2001-09-14 |
| CN1136596C (en) | 2004-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1136596C (en) | Very fast transient overvoltage suppressing method for completely enclosed combined electrical appliance | |
| Shibuya et al. | Effects of very fast transient overvoltages on transformer | |
| Tavakoli et al. | Comparison between suppressing approaches of very fast transients in gas-insulated substations (GIS) | |
| Mostafavi et al. | Providing a combined solution to reduce very fast transient overvoltages in gas insulated substations | |
| Burow et al. | New mitigation methods for transient overvoltages in gas insulated substations | |
| Szewczyk | Multi-spark modeling of very fast transient overvoltages for the purposes of developing HV and UHV gas-insulated switchgear and of conducting insulation co-ordination studies | |
| CN101211690B (en) | +/-500kV direct current mutual inductor | |
| Wang et al. | Electric field calculation and grading ring design for 330kV terminal tower with composite cross-arms | |
| Lin et al. | Interference to the Secondary Cable Caused by a Very Fast Transient Overvoltage in a Gas‐Insulated Switchgear Substation | |
| Babaei et al. | Transient ground potential rise in gas insulated substations and analysis of effective factors | |
| Amarnath et al. | Very fast transient over-voltages and transient enclosure voltages in gas insulated substations | |
| Abd-Allah et al. | New Techniques for Disconnector Switching VFT Mitigation in GIS. | |
| Kondalu et al. | Estimation of transient over voltages in gas insulated bus duct from 220 kv gas Insulated substation | |
| He et al. | Simulation studies on very fast transient overvoltage | |
| SB et al. | A review on transient analysis in Gas Insulated Substations | |
| CN205787019U (en) | A kind of disconnecting switch opening-closing bus charging current test loop protection device | |
| Shahabi et al. | Influences of transient electromagnetic fields on control cables in a gas-insulated substation due to switching operations | |
| Wang et al. | Research on VFTO Characteristics of Substation using GIL-GIS-oil/SF 6 Bushing Structure | |
| Patil et al. | Modeling and Analysis of a 3-Phase 132kv Gas Insulated Substation | |
| Abd-Allah et al. | New Techniques for VFT Mitigation in GIS | |
| Xu et al. | Model establishment and analysis of grounding circulation of gas insulated metal-enclosed switchgear enclosure | |
| Khan | Transient Voltage Distribution in Bushing | |
| Kondalu et al. | Measurement of very Fast Transient over Voltages by using MATLAB in a 2-phase various Gas Insulated Substations | |
| Almenweer et al. | Comparison between suppressing approaches of very fast transient over voltages in gas insulated substation | |
| Zhang | Study on the main inner insulation of 1100kV UHVAC oil-gas bushing and the structure optimization design of its fittings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20040128 Termination date: 20180125 |