CN1235707A - Device for controlling fault current in rotating electric machine - Google Patents
Device for controlling fault current in rotating electric machine Download PDFInfo
- Publication number
- CN1235707A CN1235707A CN97199377A CN97199377A CN1235707A CN 1235707 A CN1235707 A CN 1235707A CN 97199377 A CN97199377 A CN 97199377A CN 97199377 A CN97199377 A CN 97199377A CN 1235707 A CN1235707 A CN 1235707A
- Authority
- CN
- China
- Prior art keywords
- bar
- rotating machine
- electric rotating
- winding
- pipe etc
- 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.)
- Pending
Links
- 238000004804 winding Methods 0.000 claims abstract description 46
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 238000009413 insulation Methods 0.000 claims abstract description 5
- 230000005684 electric field Effects 0.000 claims description 4
- 239000004065 semiconductor Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000015556 catabolic process Effects 0.000 abstract 1
- 238000010891 electric arc Methods 0.000 description 11
- 230000014509 gene expression Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/46—Fastening of windings on the stator or rotor structure
- H02K3/50—Fastening of winding heads, equalising connectors, or connections thereto
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/40—Structural association with grounding devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/32—Windings characterised by the shape, form or construction of the insulation
- H02K3/40—Windings characterised by the shape, form or construction of the insulation for high voltage, e.g. affording protection against corona discharges
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2203/00—Specific aspects not provided for in the other groups of this subclass relating to the windings
- H02K2203/15—Machines characterised by cable windings, e.g. high-voltage cables, ribbon cables
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
- Windings For Motors And Generators (AREA)
- Synchronous Machinery (AREA)
Abstract
A device for internal fault current control in the end winding area of a stator (2) in a rotating high-voltage electrical machine is inserted in the end winding area. The device is composed of a grounded conductive material. The arc occurring in the event of a breakdown of the winding insulation is deflected via this arrangement.
Description
The present invention relates to a kind of device that is used for controlling fault current in the winding zone, end that rotates stator in the high-voltage motor.
The motor type of considering for example can be synchronous machine, asynchronous machine, dual-feed motor, outer utmost point motor and synchronous flow motor.At first plan motor as the generator that in the power station, is used for generating electricity.Plan motor with under high pressure, for example the exemplary operation scope be voltage from the 36kV height to 800kV, thereby they can be directly connected on all types of high-voltage fences.Motor is used for stator winding to the High-Voltage Insulation electric conductor, is called winding cable hereinafter, the cable that solid insulation is similar to be used for transmitting electricity, for example XLPE cable.Cable can also be equipped with an outside semiconductive layer, limits its bulk potential by means of this outside semiconductive layer.High-tension cable thereby surround electric field in the winding.A kind of like this conductor of insulation or cable are soft, and have in PCT application SE97/00874 and SE97/00875 kind in greater detail.About the other description of insulated electric conductor or cable can be applied for finding among SE97/00901, SE97/00902 and the SE97/00903 at PCT.
Under the situation of internal fault, electric arc may appear in motor, electric arc usually from abort situation to other cables or to stator lasmination.Be designed to be connected on the high-voltage fence and in the high-voltage motor without intermediate transformer, these fault currents may be very big.This is because can be very big from the influence of the short-circuit power of electrical network.In the such conventional motor according to the prior art state, these motors must be connected on the electrical network through intermediate transformer, because the cause of transformer has reduced to come the influence of the fault current of automatic network.Yet, may be still very big from the influence of the short circuit current of motor itself.Under the situation of the direct connection motor that the present invention relates to type, because the fault current that internal short-circuit causes may be very big.Short-circuit power in this case will comprise from the influence of electrical network with from the short-circuit power of motor itself.Therefore, importantly control can appear at the major break down electric current in the direct-connected high-voltage motor, thereby makes harm as much as possible little.
Therefore the objective of the invention is to, a kind of device that can realize this control of fault current in winding zone, end is provided.
This receives on the earth potential from realization at end winding place by the device that makes a kind of electric conducting material.
By the device ground connection in winding zone, end that makes an electric conducting material, the electric arc that failure condition produces is down guided into ground.Electric arc can not lead near other cables or lead to stator lasmination thus.Therefore, by means of an apparatus according to the invention, the electric arc that failure condition occurs down will burn between abort situation and ground through this electric conducting material, makes harm minimum thus.
According to prior art and generally supply in the winding zone, end of conventional motor of usefulness of the following voltage of 30kV, because strong electric field can not insert any nonisulated electric conducting material.In above-mentioned high-voltage motor, owing to form the outside semiconductive layer ground connection of the cable of winding, the electric field in the winding zone, end is reduced to zero or approaching zero, make fault current control become possibility thus.
For example, by measuring phase current or its derivative,, then, come the electric arc that occurs under the detection failure situation by the electronic installation of the disengagement motor that provides if if electric current is too big or/and derivative is too big.The fault detect of another kind of type is based on comparison input and output electric current, and if their difference enough big, then this indication that exists as fault.Also use the electric arc monitor of fluorescence detector form.
According to a most preferred embodiment according to device of the present invention, electric conducting material may be a bar, pipe etc., selects diameter as much as possible for a short time so that make the eddy current loss minimum, but enough big so that can make the fault current skew under failure condition.
According to second advantageous embodiment according to device of the present invention, bar or pipe so closely are placed in together in winding zone, end, thereby the electric arc under the internal fault situation is guided into ground reliably, be the electric arc that occurs under the internal fault situation before arriving other cables or stator lasmination, catch by the fault current control device reliably.
According to another advantageous embodiment according to device of the present invention, bar or pipe are inserted in certain distance in the winding zone, end, limit this distance, thereby make the eddy current that produces in bar or pipe below predetermined value.
According to another advantageous embodiment according to device of the present invention, bar or pipe fluting are so that reduce eddy current loss.
According to another advantageous embodiment according to device of the present invention, bar or pipe comprise and are combined into a branch of many smaller diameter rods or pipe that this bundle has enough cross-sectional areas, with skew short circuit current in end winding region generating under failure condition.
According to another advantageous embodiment according to device of the present invention, bar or pipe are arranged to contact with the pad of being made by elasticity, electric conducting material, described pad is applied between the adjacent winding cable in the winding zone, end, contacts with the semiconductor layer of winding cable.So bar or pipe can be inserted in the pad or be inserted in the auricle that is provided on the pad, and every bar or pipe are arranged to contact with several pads of arranging one by one on the direction of stator end.By this way, the cable in the winding area part of end is through being designed to be able to make the fault current control lever or the pipe ground connection of a large amount of fault current skews.
According to another advantageous embodiment according to device of the present invention, bar, pipe etc. also is used for mechanically stablizing the end winding.
By means of device according to the present invention, the electric arc that is caused by internal fault in winding zone, end will guide ground into through a fault current control device.Thereby reduce harm to winding zone, end.
Specifically, only will describe embodiments of the invention in detail now by example with reference to accompanying drawing, in the accompanying drawings:
Fig. 1 represents the part of stator, and rotor is cut and removed to part open;
Fig. 2 represents to have the part in winding zone, end of the bar that is used for fault current control of insertion;
Fig. 3 represents that the pad between the cable is by means of fault current control lever ground connection from the part in the winding zone, end that end winding " inside " is seen;
Figure 4 and 5 have been represented the details of winding zone, end after amplification among Fig. 3;
Fig. 6 represents by the layout in the Figure 4 and 5 of fault current control lever ground connection; And
Fig. 7,8 and 9 corresponds respectively to Fig. 4,5 and 6 view, another embodiment of the pad between the expression cable.
Fig. 1 thereby be illustrated in the part of the stator 2 of rotation in the high-voltage motor.Stator 2 is by partly cut-away, and removes rotor for the purpose of more clear.Stator winding cable is placed in the radial slot 8 of stator core.Groove 8 extends to the rear portion 4 of stator core.
The part in the winding zone, upper end of stator shown in Fig. 2 presentation graphs 1, fault current control lever are inserted between all cables 12 in the winding zone, end.Fault current control lever 10 among the figure inserts from the top, and there is certain distance the end from lamination upper surface 13.
Bar 10 ground connection, and conductor 14 is designed at the 16...18 place several bars be connected into one group of bar 10.Bar 10 so closely is placed in together in the winding of end, thereby electric arc is guided ground into reliably through bar 10 and conductor 14, and does not arrive otherwise other cable 12 or the stator lasminations that can damage.Conductor 14 is preferably made by copper or aluminium.
Every fault current control lever 10 suitably comprises many minor diameters that are combined into a branch of bar, the bar of 3mm for example, and this bundle bar has enough cross-sectional areas, for example 100mm
2, to be offset at the short circuit current that in winding zone, end, occurs under the failure condition.Thereby reduce eddy current loss.
Fig. 3 is from the part in end winding " inside " expression winding zone, end, and pad 20 is arranged between the adjacent cable 12.Learn that for the patent application of " device of the end winding location in electric rotating machine " arrangement of these pads 20 is illustrated in the Figure 4 and 5 in more detail by exercise question.Adjacent cable 12 thereby by means of the intermediate washer 20 of elasticity, electric conducting material be clamped together (not expression in detail in the drawings).
Fig. 7,8 and 9 expressions correspond respectively to Fig. 4,5 and 6 view, and expression has another embodiment of the pad 34 of an elongated auricle or flange 36, and auricle or flange 36 are different with the auricle 30 among Fig. 4-6, and along the whole length extension of pad 34.This flange 36 is passed in a hole 38, wherein inserts a fault current control lever 10, and fault current control lever 10 is through being combined into several fault current control levers conductor 14 ground connection of one group of bar at the 16...18 place.
Earth potential is limited by the external shell of motor usually.
Claims (12)
1. electric rotating machine that is used for high pressure, comprise a stator (2), a rotor and all windings, wherein winding comprises high-tension cable and device that is used for fault current control that surrounds the winding internal electric field, and this motor is characterised in that: the device (10) that is used for fault current control comprises a ground connection and is arranged in the bar of the electric conducting material in winding zone, end, pipe etc.
2. electric rotating machine according to claim 1, it is characterized in that: the arrangement of the bar in winding zone, end, pipe etc. is settled like this, thereby distance such as the greatest physical between bar, pipe etc. is little as to be enough to guarantee the arc offset in the winding zone, end to ground.
3. electric rotating machine according to claim 1 and 2 is characterized in that: bar or pipe etc. is inserted in the winding zone, end one section specific distance and limits this distance, thereby makes the eddy current that produces in bar or pipe etc. below predetermined value.
4. according to each described electric rotating machine of claim 1-3, it is characterized in that: flutings such as bar or pipe, so that reduce eddy current loss.
5. according to each described electric rotating machine of claim 1-3, it is characterized in that: bar or pipe etc. comprises and is combined into a branch of a plurality of little conductor that this bundle has enough cross-sectional areas, with skew short circuit current in end winding region generating under failure condition.
6. according to each described electric rotating machine of claim 1-5, it is characterized in that: bar or pipe etc. is arranged to contact with the pad of elasticity, electric conducting material, described pad is applied between the adjacent cable in the winding zone, end, and contacts with the outer semiconductor layer of cable.
7. electric rotating machine according to claim 6, it is characterized in that: bar or pipe etc. is inserted in the pad.
8. according to each described electric rotating machine of claim 6-7, it is characterized in that: bar or pipe etc. is arranged to contact with several pads of arranging one by one on the direction of stator end.
9. according to each described electric rotating machine of claim 1-8, it is characterized in that: this device is made up of flexible lead.
10. according to each described electric rotating machine of claim 1-9, it is characterized in that: this device also is used for mechanically stablizing the end winding.
11. according to each described electric rotating machine of claim 1-10, it is characterized in that: high-tension cable is flexible, and comprise one or more currents, be a internal layer wherein with semiconducting behavior around each conductor arrangement, what arrange around internal layer is a solid insulation part, and what arrange around insulated part is a skin with semiconducting behavior.
12. according to each described electric rotating machine of claim 1-11, it is characterized in that: its design of Windings becomes voltage suitably to surpass 36kV, and preferably high to very high voltage, as 400kV to 800kV.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9604034A SE512914C2 (en) | 1996-11-04 | 1996-11-04 | Device for controlling fault currents in a rotating electric machine |
| SE96040340 | 1996-11-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1235707A true CN1235707A (en) | 1999-11-17 |
Family
ID=20404491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97199377A Pending CN1235707A (en) | 1996-11-04 | 1997-11-04 | Device for controlling fault current in rotating electric machine |
Country Status (13)
| Country | Link |
|---|---|
| EP (1) | EP0935839A1 (en) |
| JP (1) | JP2001503597A (en) |
| CN (1) | CN1235707A (en) |
| AU (1) | AU721365B2 (en) |
| BR (1) | BR9712856A (en) |
| CA (1) | CA2270341A1 (en) |
| CZ (1) | CZ147299A3 (en) |
| IL (1) | IL129736A0 (en) |
| NO (1) | NO992130D0 (en) |
| PL (1) | PL333178A1 (en) |
| SE (1) | SE512914C2 (en) |
| TR (1) | TR199900966T2 (en) |
| WO (1) | WO1998020598A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427283A (en) * | 2011-10-17 | 2012-04-25 | 衣广津 | Choked flow circle |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| UA45452C2 (en) | 1996-05-29 | 2002-04-15 | Абб Аб | HIGH VOLTAGE AC ELECTRIC MACHINE (OPTIONS) AND DISTRIBUTION OR MAIN NETWORK |
| JP2000511395A (en) | 1996-05-29 | 2000-08-29 | アセア ブラウン ボベリ アクティエボラーグ | Rotary electrical machine with high voltage stator windings and elongated support for supporting the windings and method of manufacturing such a machine |
| SE9602079D0 (en) | 1996-05-29 | 1996-05-29 | Asea Brown Boveri | Rotating electric machines with magnetic circuit for high voltage and a method for manufacturing the same |
| SE9704412D0 (en) | 1997-02-03 | 1997-11-28 | Asea Brown Boveri | A power transformer / reactor |
| SE510452C2 (en) | 1997-02-03 | 1999-05-25 | Asea Brown Boveri | Transformer with voltage regulator |
| SE9704413D0 (en) | 1997-02-03 | 1997-11-28 | Asea Brown Boveri | A power transformer / reactor |
| SE513083C2 (en) | 1997-09-30 | 2000-07-03 | Abb Ab | Synchronous compensator system and the use of such and phase compensation method in a high voltage field |
| SE513555C2 (en) | 1997-11-27 | 2000-10-02 | Abb Ab | Method of applying a pipe means in a space of a rotating electric machine and rotating electric machine according to the method |
| GB2331858A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | A wind power plant |
| GB2331853A (en) | 1997-11-28 | 1999-06-02 | Asea Brown Boveri | Transformer |
| SE516002C2 (en) | 2000-03-01 | 2001-11-05 | Abb Ab | Rotary electric machine and method of making a stator winding |
| SE516442C2 (en) | 2000-04-28 | 2002-01-15 | Abb Ab | Stationary induction machine and cable therefore |
| US7002278B2 (en) * | 2003-09-12 | 2006-02-21 | Siemens Westinghouse Power Corporation | Support structure for high-voltage conductors |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1418856A (en) * | 1919-05-02 | 1922-06-06 | Allischalmers Mfg Company | Dynamo-electric machine |
| DE584639C (en) * | 1929-12-28 | 1933-09-27 | Aeg | Corona protection for windings in electrical machines |
| US5036165A (en) * | 1984-08-23 | 1991-07-30 | General Electric Co. | Semi-conducting layer for insulated electrical conductors |
| DE4022476A1 (en) * | 1990-07-14 | 1992-01-16 | Thyssen Industrie | Electric cable for three=phase AC winding of linear motor - covers one phase by inner conducting layer surrounded by insulation and outer conducting layer |
-
1996
- 1996-11-04 SE SE9604034A patent/SE512914C2/en not_active IP Right Cessation
-
1997
- 1997-11-04 AU AU49736/97A patent/AU721365B2/en not_active Ceased
- 1997-11-04 EP EP97912611A patent/EP0935839A1/en not_active Withdrawn
- 1997-11-04 CZ CZ991472A patent/CZ147299A3/en unknown
- 1997-11-04 JP JP52129998A patent/JP2001503597A/en active Pending
- 1997-11-04 CN CN97199377A patent/CN1235707A/en active Pending
- 1997-11-04 PL PL97333178A patent/PL333178A1/en unknown
- 1997-11-04 IL IL12973697A patent/IL129736A0/en unknown
- 1997-11-04 WO PCT/SE1997/001844 patent/WO1998020598A1/en not_active Application Discontinuation
- 1997-11-04 BR BR9712856-2A patent/BR9712856A/en not_active IP Right Cessation
- 1997-11-04 CA CA002270341A patent/CA2270341A1/en not_active Abandoned
- 1997-11-04 TR TR1999/00966T patent/TR199900966T2/en unknown
-
1999
- 1999-05-03 NO NO992130A patent/NO992130D0/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102427283A (en) * | 2011-10-17 | 2012-04-25 | 衣广津 | Choked flow circle |
Also Published As
| Publication number | Publication date |
|---|---|
| AU721365B2 (en) | 2000-06-29 |
| IL129736A0 (en) | 2000-02-29 |
| WO1998020598A1 (en) | 1998-05-14 |
| TR199900966T2 (en) | 1999-08-23 |
| CA2270341A1 (en) | 1998-05-14 |
| NO992130L (en) | 1999-05-03 |
| SE9604034D0 (en) | 1996-11-04 |
| SE9604034L (en) | 1998-05-05 |
| NO992130D0 (en) | 1999-05-03 |
| CZ147299A3 (en) | 1999-12-15 |
| SE512914C2 (en) | 2000-06-05 |
| PL333178A1 (en) | 1999-11-22 |
| JP2001503597A (en) | 2001-03-13 |
| AU4973697A (en) | 1998-05-29 |
| EP0935839A1 (en) | 1999-08-18 |
| BR9712856A (en) | 1999-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1235707A (en) | Device for controlling fault current in rotating electric machine | |
| US6417456B1 (en) | Insulated conductor for high-voltage windings and a method of manufacturing the same | |
| CN1101988C (en) | Electric high voltage AC machine | |
| EA199801050A1 (en) | HIGH VOLTAGE INSTALLATIONS WITH ELECTRIC MOTORS | |
| AR007342A1 (en) | INSTALLATION INCLUDING A HIGH VOLTAGE ROTARY ELECTRIC MACHINE; ROTARY MACHINE AND MANUFACTURING METHOD FOR SUCH INSTALLATION | |
| CN1279840A (en) | Wind power plant | |
| EP1034605B1 (en) | An insulated conductor | |
| CN1007312B (en) | Monitoring of Armature Current in Large Three-phase Generator | |
| WO1997045929A2 (en) | Earthing device and rotating electric machine including the device | |
| AU718709B2 (en) | A device in the stator of a rotating electric machine | |
| US7952251B2 (en) | Systems and methods for shielding an electric machine | |
| CN113517084B (en) | Direct-current high-voltage blocker type cable and direct-current high-voltage trial delivery test system | |
| EP1193828B1 (en) | Power system having stator coils for grading voltage between inner vent tubes and coil strands and associated methods | |
| US20040089468A1 (en) | Induction winding | |
| US4437083A (en) | Current transformer for turbine generators | |
| JPH03235613A (en) | Lightning arrester for power transmission towers | |
| CA1177538A (en) | Capacitive signal coupler | |
| GB2133936A (en) | Electrical apparatus | |
| SE508765C2 (en) | Power transformer-inductor for high transmission voltage | |
| TH31161A (en) | High pressure system with electric motor | |
| SE511161C2 (en) | Winding in electric machine with stationary parts e.g. power transformer | |
| JPS60170413A (en) | Power cable line |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |