NO119033B - - Google Patents
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- Publication number
- NO119033B NO119033B NO232868A NO232868A NO119033B NO 119033 B NO119033 B NO 119033B NO 232868 A NO232868 A NO 232868A NO 232868 A NO232868 A NO 232868A NO 119033 B NO119033 B NO 119033B
- Authority
- NO
- Norway
- Prior art keywords
- rectifier
- mains
- ship
- generator
- resistor
- Prior art date
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
- H02J3/36—Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Description
StrOmforsyningsanlegg for skip med akselgenerator, Tillegg til patent nr. 117.250 Power supply system for ships with shaft generator, Addendum to patent no. 117,250
Oppfinnelsen angår et strømforsyningsanlegg for skip, bestemt til å frembringe en vekselspenning med konstant frekvens og omfattende en akselgenerator i form av en synkrongenerator som drives med sterkt variabelt omdreiningstall, og en ikke styrt likeretter som er koblet efter akselgeneratoren, samtidig som der til forsyning av skipsnettet ved frakoblet akselgenerator er anordnet minst en skipsnettgenerator i form av en synkronmaskin drevet av en hjelpekraftmaskin (som angitt i patent nr. 117.250 ). Efter likerettaren er der på i og for seg kjent måte innkoblet en nett-f6rt strOmr«tter som mater skipsnettet, og den som skipsnettgenerator anordnede synkronmaskin er ved utkoblet akselgenerator nu også i tilfellet av drift av akselgeneratoren fast forbundet med strSmretterens utgang og skipsnettet. Foruten den kjente funksjon til forsyning av skipsnettet ved utkoblet akselgenerator overtar synkronmaskinen ved innkoblet akselgenerator samtidig funksjonene som kommuteringshjelp for strSmretteren, for blindstromlevering til skipsnettet og strOmretteren og som en filterkrets for strdm-retterens overbfilger. The invention relates to a power supply system for ships, intended to produce an alternating voltage with a constant frequency and comprising a shaft generator in the form of a synchronous generator which is operated with a highly variable number of revolutions, and an uncontrolled rectifier which is connected after the shaft generator, at the same time as supplying the ship's network in the case of a disconnected shaft generator, at least one ship mains generator is arranged in the form of a synchronous machine driven by an auxiliary power machine (as stated in patent no. 117,250). After the rectifier, in a manner known per se, a mains-powered rectifier is connected which feeds the ship's mains, and the synchronous machine arranged as a ship's mains generator is, when the shaft generator is switched off, now also in the case of operation of the shaft generator firmly connected to the rectifier's output and the ship's mains. In addition to the known function of supplying the ship's grid when the shaft generator is switched off, the synchronous machine when the shaft generator is switched on simultaneously takes over the functions as a commutation aid for the rectifier, for blind current supply to the ship's grid and the rectifier and as a filter circuit for the rectifier's upper arm.
I hovedsoknaden er det allerede foreslått å koble inn en nettkvelespole mellem skipsnettet og skipsnettgeneratoren. Ved kortslutning i skipsnettet forhindrer denne nettkvelespole da en kipping av den nettforte str&nretter fordi spenningen ved strOm-retterens utgang ikke går tilbake til null. Hvis strOmretteren imidlertid allikevel kipper på grunn av en feil i tennestyringen for stromretterventilene eller ved sterke spenningssvingninger i skipsnettet, går der en kortslutningsstr6m fra nettet over str6m-retteren og over den ikke styrte likeretter. For dette tilfelle kan heller ikke nettkvelespolen lenger hindre at der går en kort-slutnings strom. For nu å undgå at sikringene for stromretterventilene dermed brenner igjennem, gir nu den foreliggende oppfinnelse anvisning på at der mellem likeretter og strOmretter er innkoblet en motstand med shuntingsbryter, og at der er anordnet en koblings-innretning som åpner shuntingsbryteren når strOmmen overskrider en på forhånd gitt 6vre grenseverdi, og slutter den når strommen når en på forhånd gitt nedre grenseverdi. In the main section, it has already been proposed to connect a mains choke coil between the ship's mains and the ship's mains generator. In the event of a short-circuit in the ship's mains, this mains choke prevents the mains-powered rectifier from tipping because the voltage at the rectifier's output does not return to zero. If, however, the rectifier still tilts due to an error in the ignition control for the rectifier valves or due to strong voltage fluctuations in the ship's network, a short-circuit current from the network passes through the rectifier and over the uncontrolled rectifier. In this case, the mains choke coil can no longer prevent a short-circuit current from flowing. In order to avoid that the fuses for the rectifier valves blow through, the present invention now provides instructions that a resistor with a shunting switch is connected between the rectifier and the current inverter, and that a switching device is arranged that opens the shunting switch when the current exceeds a predetermined given upper limit value, and ends when the current reaches a pre-given lower limit value.
Blir bryteren åpnet i tilfellet av en forstyrrelse, blir kortslutningsstrSmmen ved hjelp av motstanden i likestrOm-mellemkretsen begrenset til en verdi hvor ventilenes sikringer ikke lenger er truet. Hensiktsmessig blir akselgeneratoren av-magnetisert i forbindelse med åpningen av bryteren. IfBlge et ytterligere forslag i henhold til oppfinnelsen skal slutningen av bryteren skje i avhengighet av spenningen på motstanden. Det betyr at shuntingsbryteren omtrent ved spenning null på motstanden igjen blir sluttet. Åpningen av shuntingsbryteren ved hjelp av koblingsinnretningen skjer hensiktsmessig stromavhengig under anvendelse av en overstr6mutl6ser. If the switch is opened in the event of a disturbance, the short-circuit current is limited by means of the resistance in the DC intermediate circuit to a value where the valves' fuses are no longer threatened. Appropriately, the shaft generator is demagnetized in connection with the opening of the switch. According to a further proposal according to the invention, the closing of the switch should take place in dependence on the voltage on the resistor. This means that the shunting switch is again closed at approximately zero voltage on the resistor. The opening of the shunting switch by means of the switching device takes place appropriately in a current-dependent manner using an overcurrent switch.
Oppfinnelsen vil bli belyst under henvisning til tegningen. The invention will be explained with reference to the drawing.
En akselgenerator 10 mater et skipsnett 16 over en ikke styrt likeretter 14 og en nettfOrt strBmretter 15» Ved ut-gangen fra stromretteren 15 ligger en synkronmaskin 17 der tjener som faseforskyver. Mellem synkronmaskinen og skipsnettet l6 er der innkoblet en nettkvelespole 23, som i tilfellet av kortslutning i skipsnettets 16 skal forhindre stromretteren 15 i å kippe. I likestrøm-mellemkretsen mellem likeretteren 14 og stromretteren 15 er der ennvidere innskutt en motstand 60, som er kortsluttet med en bryter 6l når anlegget arbeider uten forstyrrelse. Går der imidlertid en kortslutningsstrom i likestrom-mellemkretsen fordi strømretteren 15 av en eller annen grunn kipper, blir shuntingsbryteren 6l åpnet ved hjelp av en ikke vist overstrom-utløser. Motstanden 60 begrenser da kortslutningsstrommen til en tilstrekkelig lav verdi til å forhindre avsmeltning av strom-retterventilenes sikringer, som heller ikke er vist på tegningen. Efterat kortslutningsstrommen er bortfalt, faller der ikke lenger noen spenning på motstanden 60. Derfor kan shuntingsbryteren 6l sluttes påny i avhengighet av spenningsfallet på motstanden 60. A shaft generator 10 feeds a ship's network 16 via an uncontrolled rectifier 14 and a mains powered rectifier 15. At the output from the rectifier 15 is a synchronous machine 17 which serves as a phase shifter. A mains choke coil 23 is connected between the synchronous machine and the ship's mains 16, which in the event of a short circuit in the ship's mains 16 is to prevent the rectifier 15 from tripping. In the direct current intermediate circuit between the rectifier 14 and the rectifier 15, a resistor 60 is also inserted, which is short-circuited with a switch 6l when the plant is working without disturbance. If, however, there is a short-circuit current in the DC intermediate circuit because the rectifier 15 flips for some reason, the shunting switch 6l is opened by means of an overcurrent release, not shown. The resistor 60 then limits the short-circuit current to a sufficiently low value to prevent melting of the fuses of the rectifier valves, which are also not shown in the drawing. After the short-circuit current has disappeared, there is no longer any voltage on the resistor 60. Therefore, the shunting switch 6l can be closed again depending on the voltage drop on the resistor 60.
Dette skjer hensiktsmessig ved et spenningsfall lik null. This happens appropriately with a voltage drop equal to zero.
Claims (2)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEL53900A DE1281027B (en) | 1966-06-23 | 1966-06-23 | Power supply system for an alternating voltage on-board network on ships with a wave generator |
| DEL0054463 | 1966-09-03 | ||
| DEL0056790 | 1967-06-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO119033B true NO119033B (en) | 1970-03-16 |
Family
ID=7278061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO232868A NO119033B (en) | 1966-06-23 | 1968-06-14 |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE1588462A1 (en) |
| FR (1) | FR95207E (en) |
| NO (1) | NO119033B (en) |
| SE (1) | SE344923B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3118284C2 (en) * | 1981-05-08 | 1985-10-17 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Arrangement for the protection of bridges with controllable semiconductors against overcurrent and short-circuit currents |
| DE102008031698A1 (en) | 2007-11-02 | 2009-06-04 | Siemens Aktiengesellschaft | Floating harbor power supply |
-
1967
- 1967-06-21 DE DE19671588462 patent/DE1588462A1/en active Pending
-
1968
- 1968-06-13 SE SE803868A patent/SE344923B/xx unknown
- 1968-06-14 NO NO232868A patent/NO119033B/no unknown
- 1968-06-21 FR FR155963A patent/FR95207E/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| DE1588462A1 (en) | 1970-12-10 |
| FR95207E (en) | 1970-08-07 |
| SE344923B (en) | 1972-05-08 |
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