SE512299C2 - Series compensating rotating electric alternating current machines - Google Patents

Series compensating rotating electric alternating current machines

Info

Publication number
SE512299C2
SE512299C2 SE9700348A SE9700348A SE512299C2 SE 512299 C2 SE512299 C2 SE 512299C2 SE 9700348 A SE9700348 A SE 9700348A SE 9700348 A SE9700348 A SE 9700348A SE 512299 C2 SE512299 C2 SE 512299C2
Authority
SE
Sweden
Prior art keywords
transmission network
distribution
machine
ground
alternating current
Prior art date
Application number
SE9700348A
Other languages
Swedish (sv)
Other versions
SE9700348L (en
SE9700348D0 (en
Inventor
Mats Leijon
Lars Gertmar
Jan-Anders Nygren
Peter Templin
Original Assignee
Abb Ab
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Abb Ab filed Critical Abb Ab
Priority to SE9700348A priority Critical patent/SE512299C2/en
Publication of SE9700348D0 publication Critical patent/SE9700348D0/en
Priority to SE9704421A priority patent/SE9704421D0/en
Priority to BR9807649A priority patent/BR9807649A/en
Priority to RU99119087/09A priority patent/RU2201027C2/en
Priority to CA002278631A priority patent/CA2278631A1/en
Priority to US09/355,852 priority patent/US6465979B1/en
Priority to PL98334904A priority patent/PL334904A1/en
Priority to CN98802272A priority patent/CN1104767C/en
Priority to PCT/SE1998/000162 priority patent/WO1998034315A1/en
Priority to NZ337070A priority patent/NZ337070A/en
Priority to JP53280498A priority patent/JP2001511339A/en
Priority to AU58913/98A priority patent/AU730676B2/en
Priority to EP98902359A priority patent/EP1012945A1/en
Publication of SE9700348L publication Critical patent/SE9700348L/en
Priority to NO993687A priority patent/NO993687L/en
Publication of SE512299C2 publication Critical patent/SE512299C2/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
    • H02J3/1885—Arrangements for adjusting, eliminating or compensating reactive power in networks using rotating AC generators, e.g. synchronous generators
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
    • Y02E40/30—Reactive power compensation

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The method involves connecting a capacitive circuit (14) for the fundamental frequency of the voltage is in each phase between the down side of the winding and the earth point (20) of the distribution or transmission network (6). Each capacitive circuit includes a capacitor. An over-voltage protection device (26) is connected in parallel with the capacitors. A band-stop filter (16) is arranged between the Y-point of the capacitor bank formed by the capacitors and the earth point of the distribution or transmission network. A low Ohmic resistor is connected between the band-stop filter and the earth point. The windings are wound using high-voltage cable.

Description

10 15 20 25 30 512 299 kan användas till skillnad från vad fallet är vid seriekompensering på högspända transmissionsnät enligt hittills använd teknik. Vid anordningen enligt uppfinningen kan följaktligen billigare kondensatorer användas, eftersom de är skyddade av själva maskinen och anslutna till neutralpunkten, som ligger på låg potential i förhållande till jord. 10 15 20 25 30 512 299 can be used unlike the case at hand series compensation on high-voltage transmission networks as hitherto use technology. In the device according to the invention, consequently cheaper capacitors are used, because they are protected by the machine itself and connected to the neutral point, which is at low potential in relation to soil.

Enligt en fördelaktig utföringsform av anordningen enligt uppfinningen är ett överspänningsskydd parallellkopplat med kondensatorerna, varigenom de skyddas mot vid ett feltillstànd eventuellt uppträdande överspänningar.According to an advantageous embodiment of the device according to the invention, a surge protector is connected in parallel with the capacitors, thereby protecting them against at one fault condition possibly occurring overvoltages.

Enligt andra fördelaktiga utföringsformer av anordningen enligt uppfinningen är ett spärrtonsfilter anordnat mellan kondensatorbatteriets Y-punkt och distributions- eller transmissionsnätets jord, eventuellt med ett làgohmigt motstànd inkopplat mellan spärrtonsfiltret och jorden. Detta motstånd kan vara ett s.k. nollpunktsmotständ, dimensionerat för en jordfelsström av ofarlig storlek av några tiotal ampere. Ett jordfel i växelströmsmaskinen eller generatorn kan nämligen ge en jordfelsström via detta motstånd, men genom att kontrollera jordfelsströmmen kan åtgärder vidtagas för att koppla bort generatorn eller eventuellt felbehäftad fas.According to other advantageous embodiments of the device according to the invention, a barrier tone filter is provided between the Y-point of the capacitor battery and the distribution or the ground of the transmission network, possibly with a low-impedance resistor connected between the blocking tone filter and the ground. This resistance can be a so-called zero point resistor, dimensioned for a earth fault current of harmless size of a few tens of amperes. One earth faults in the AC machine or generator can namely give an earth fault current via this resistor, but by checking earth fault current, measures can be taken to disconnect the generator or any faulty phase.

På detta sätt kan också eventuellt förhöjd transient maskinreaktans effektivt kompenseras.In this way can also be possibly elevated transient machine reactance is effectively compensated.

För att närmare förklara uppfinningen kommer nu en, säsom exempel vald utföringsform av anordningen enligt uppfinningen att beskrivas närmare med hänvisning till bifogade ritningar, på vilka figur 1 visar ett utföringsexempel av anordningen enligt uppfinningen och figur 2 ett tvärsnitt av den som används vid den roterande elektriska högspänningskabel, maskinen enligt uppfinningen.. 10 15 20 25 30 'i 512 299 I figur 1 visas en växelströmsmaskin 2 i form av en generator, vars fasspänningar ansluts direkt till nätet 6 via frånskiljare och brytare 4. På generatorns 2 utgångssida finns vidare överspänningsskydd 8 samt strömmätanordningar 10.In order to explain the invention in more detail, a as an example, selected embodiment of the device according to the invention to be described in more detail with reference to the accompanying drawings, in which Figure 1 shows an embodiment of the device according to the invention and figure 2 a cross section of it used in the rotating electric high voltage cable, the machine according to the invention .. 10 15 20 25 30 'i 512 299 Figure 1 shows an alternating current machine 2 in the form of a generator, whose phase voltages are connected directly to the mains 6 via disconnector and switch 4. On the output side of the generator 2 there is further surge protection 8 and current measuring devices 10.

Generatorns 2 statorlindning är Y~kopplad och på lindningens nedsida är en seriekompenseringkondensator 14 inkopplad i var och en av faserna. Till kondensatorbatteriets Y- punkt är ett spärrtonsfilter 16 samt ett nollpunktsmotstånd 18 anslutet till nätets 6 jord 20. Vidare finns även på denna sida av generatorn 2 strömmätanordningar 22, 24.The stator winding of the generator 2 is Y ~ connected and on the underside of the winding is a series compensation capacitor 14 engaged in each of the phases. To the Y- of the capacitor battery point is a blocking tone filter 16 and a zero point resistor 18 connected to the network's 6 earth 20. Further information is also available on this page of the generator 2 current measuring devices 22, 24.

Genom inkoppling av en seriekondensator 14 i var och en av faserna åstadkoms en seriekompensering av växelströmsmaskinen 2, som sänker systemreaktansen. Överspänningsskydd 26 och ett motstånd R är lämpligen inrättade för att skydda kondensatorerna 14 vid ett eventuellt feltillstånd.By connecting a series capacitor 14 in each of the phases, a series compensation of the AC machine is achieved 2, which lowers the system reactance. Surge protection 26 and a resistor R are suitable set up to protect the capacitors 14 in the event of a fault condition.

Filtret 16 har ej något direkt att göra med uppfinningen och kommer ej att beskrivas närmare.The filter 16 has nothing directly to do with the invention and will not be described in more detail.

Nollpunktsmotståndet 18 är dimensionerat för att begränsa en jordfelsström till en ofarlig storlek av några tiotal ampere. Ett jordfel i generatorn 2 kan således ge en jordfelström genom motståndet 18 och genom att kontrollera storleken på denna ström kan åtgärder vidtagas för att koppla bort generatorn och eventuellt felbehäftad fas.The zero point resistor 18 is dimensioned to limit an earth fault current to a harmless size of some tiotal ampere. An earth fault in generator 2 can thus give one earth fault current through resistor 18 and by checking the size of this current, measures can be taken to connect remove the generator and any faulty phase.

Alternativt kan generatorn 2 vara ansluten till nätet via en strömriktare 28, såsom antyds i figur 1.Alternatively, the generator 2 can be connected to the mains via a converter 28, as indicated in Figure 1.

I figur 1 har generatorns fältmatning utelämnats.In Figure 1, the field feed of the generator has been omitted.

I figur 2 visas en tvärsnittsvy av en högspänningskabel 29, som används vid den roterande elektriska maskinen enligt uppfinningen. Högspänningskabeln 29 innefattar ett antal 10 15 20 25 30 " 512 299 kardeler 31 med cirkulärt tvärsnitt av exempelvis koppar. Dessa kardeler 31 är anordnade i mitten av högspänningskabeln 29. Runt kardelerna 31 är ett första halvledande skikt 32 anordnat. Runt det första halvledande skiktet 32 är ett isolationsskikt 33, t ex PEX-isolation, anordnat, och runt isolationsskiktet 33 ett andra halvledande skikt 34.Figure 2 shows a cross-sectional view of a high voltage cable 29, used in the rotary electric machine according to the invention. The high voltage cable 29 comprises a number 10 15 20 25 30 "512 299 strands 31 with a circular cross section of, for example, copper. These strands 31 are arranged in the middle of the high voltage cable 29. Around the strands 31, a first semiconducting layer 32 is provided. Around the first semiconducting layer 32 is an insulating layer 33, t ex PEX insulation, arranged, and around the insulation layer 33 a second semiconductor layer 34.

Claims (9)

1.411 10 15 20 25 30 'i 512- 299 Patentkrav1,411 10 15 20 25 30 'i 512-299 Claims 1. Förfarande för seriekompensering av, till trefas distributions- eller transmissionsnät (6) direkt eller via strömriktare (28) ansluten, roterande, elektrisk växelströms- maskin (2), varvid växelströmsmaskinens statorlindning är Y-kopplad, kânnetecknad av att en för spänningens grundton kapacitiv krets (14) inkopplas i varje fas mellan lindningens nedsida och distributions- eller transmissionsnätets (6) jord (20).Method for series compensation of a rotating electric rotary electric machine (2) connected directly to a three-phase distribution or transmission network (6), wherein the stator winding of the alternating current machine is Y-coupled, characterized in that a fundamental tone of the voltage capacitive circuit (14) is connected in each phase between the lower side of the winding and the ground (20) of the distribution or transmission network (6). 2. Anordning för seriekompensering av, till trefas distributions- eller transmissionsnät (6) direkt eller via strömriktare (28) ansluten, roterande, elektrisk växelströms- maskin (2), varvid växelströmsmaskinens statorlindning är Y-kopplad, kännetecknad av att en för spänningens grundton kapacitiv krets (14) är inkopplad i varje fas mellan lind- ningens nedsida och distributions- eller transmissionsnätets (6) jord (20).Device for series compensation of a rotating electric rotary electric machine (2) connected directly to a three-phase distribution or transmission network (6), wherein the stator winding of the alternating current machine is Y-coupled, characterized in that a fundamental tone of the voltage capacitive circuit (14) is connected in each phase between the lower side of the winding and the ground (20) of the distribution or transmission network (6). 3. Anordning enligt krav 2, kännetecknad av att varje kapacitiv krets innefattar en kondansator (14).Device according to claim 2, characterized in that each capacitive circuit comprises a capacitor (14). 4. Anordning enligt krav 3, kännetecknad av att ett överspänningsskydd (26) är parallellkopplat med kondensato- rerna (14).Device according to Claim 3, characterized in that a surge protector (26) is connected in parallel with the capacitors (14). 5. Anordning enligt krav 2 eller 3, kännetecknad av att ett spärrtonsfilter (16) är anordnat mellan det, av kondensa- torerna (14) bildade kondensatorbatteriets Y-punkt och distributions- eller transmissionsnätets (6) jord (20). lO 15 20 512 299Device according to Claim 2 or 3, characterized in that a barrier filter (16) is arranged between the Y-point of the capacitor battery formed by the capacitors (14) and the ground (20) of the distribution or transmission network (6). lO 15 20 512 299 6. Anordning enligt krav 5, kännetecknad av att ett lågohmigt motstånd (18) är inkopplat mellan spärrtonsfiltret (16) och distributions- eller transmissionsnätets (6) jord (20).Device according to Claim 5, characterized in that a low-ohmic resistor (18) is connected between the blocking tone filter (16) and the ground (20) of the distribution or transmission network (6). 7. Roterande elektrisk maskin med lindningar dragna i spår i statorn, kännetecknad av att lindningarna är lindade av högspänningskabel samt att maskinen är försedd med en anordning enligt något av kraven 2 - 6.Rotary electric machine with windings drawn in grooves in the stator, characterized in that the windings are wound by high voltage cable and that the machine is provided with a device according to any one of claims 2 - 6. 8. Maskin enligt krav 7, kännetecknad av att högspännings- kabeln är av ett slag, som innefattar en kärna med ett flertal kardeler, ett kärnan omslutande inre halvledande skikt, ett det inre halvledande skiktet omslutande isolerande skikt och ett det isolerande skiktet omslutande yttre halvledande skikt.A machine according to claim 7, characterized in that the high voltage cable is of a type comprising a core having a plurality of strands, a core enclosing inner semiconductor layer, an inner semiconducting layer enclosing insulating layer and an insulating layer enclosing the outer semiconductor layer. 9. Maskin enligt krav 8, kännetecknad av att högspännings- kabeln har en diameter i intervallet 20 - 200 mm och en ledningsarea i intervallet 80 - 3000 mmzMachine according to claim 8, characterized in that the high-voltage cable has a diameter in the range 20 - 200 mm and a line area in the range 80 - 3000 mmz
SE9700348A 1997-02-03 1997-02-03 Series compensating rotating electric alternating current machines SE512299C2 (en)

Priority Applications (14)

Application Number Priority Date Filing Date Title
SE9700348A SE512299C2 (en) 1997-02-03 1997-02-03 Series compensating rotating electric alternating current machines
SE9704421A SE9704421D0 (en) 1997-02-03 1997-11-28 Series compensation of electric alternator
EP98902359A EP1012945A1 (en) 1997-02-03 1998-02-02 Series compensation of electric alternating current machines
PL98334904A PL334904A1 (en) 1997-02-03 1998-02-02 Ac electric machine in-series compensation
NZ337070A NZ337070A (en) 1997-02-03 1998-02-02 Series compensation of electric alternating current machines
CA002278631A CA2278631A1 (en) 1997-02-03 1998-02-02 Series compensation of electric alternating current machines
US09/355,852 US6465979B1 (en) 1997-02-03 1998-02-02 Series compensation of electric alternating current machines
BR9807649A BR9807649A (en) 1997-02-03 1998-02-02 Series compensation of alternating current machines
CN98802272A CN1104767C (en) 1997-02-03 1998-02-02 Series compensation of electric alternating current machines
PCT/SE1998/000162 WO1998034315A1 (en) 1997-02-03 1998-02-02 Series compensation of electric alternating current machines
RU99119087/09A RU2201027C2 (en) 1997-02-03 1998-02-02 Series compensation in alternating-current machines
JP53280498A JP2001511339A (en) 1997-02-03 1998-02-02 Method and apparatus for performing series compensation of rotary ac equipment
AU58913/98A AU730676B2 (en) 1997-02-03 1998-02-02 Series compensation of electric alternating current machines
NO993687A NO993687L (en) 1997-02-03 1999-07-29 Series compensation of electric AC machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9700348A SE512299C2 (en) 1997-02-03 1997-02-03 Series compensating rotating electric alternating current machines

Publications (3)

Publication Number Publication Date
SE9700348D0 SE9700348D0 (en) 1997-02-03
SE9700348L SE9700348L (en) 1998-08-04
SE512299C2 true SE512299C2 (en) 2000-02-28

Family

ID=20405636

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9700348A SE512299C2 (en) 1997-02-03 1997-02-03 Series compensating rotating electric alternating current machines

Country Status (1)

Country Link
SE (1) SE512299C2 (en)

Also Published As

Publication number Publication date
SE9700348L (en) 1998-08-04
SE9700348D0 (en) 1997-02-03

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