NO770786L - POWER DEVICE FOR DC POWER. - Google Patents

POWER DEVICE FOR DC POWER.

Info

Publication number
NO770786L
NO770786L NO770786A NO770786A NO770786L NO 770786 L NO770786 L NO 770786L NO 770786 A NO770786 A NO 770786A NO 770786 A NO770786 A NO 770786A NO 770786 L NO770786 L NO 770786L
Authority
NO
Norway
Prior art keywords
unit
switch
voltage
point
rectifier
Prior art date
Application number
NO770786A
Other languages
Norwegian (no)
Inventor
Adolf Cairenius
Kimmo Pokkinen
Original Assignee
Televa
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 Televa filed Critical Televa
Publication of NO770786L publication Critical patent/NO770786L/en

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20—End-user application control systems

Landscapes

  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
  • Prostheses (AREA)

Description

Matesystem for likestrøm.Feeding system for direct current.

Oppfinnelsen angår et matesystem for likestrøm, som omfatter en med et vekselstrømnett koplet likeretterenhet og en med denne koplet reguleringsenhet for likestrøm, og som er koplet med en belastning og med et akkumulatorsystem fra hvilket matingen av belastningen skjer ved strømavbrudd i nettet og/eller ved feil i systemet. The invention relates to a feeding system for direct current, which comprises a rectifier unit connected to an alternating current network and a regulating unit for direct current connected to this, and which is connected to a load and to an accumulator system from which the load is fed in the event of a power cut in the network and/or in the event of a fault in the system.

Formålet med oppfinnelsen er å tilveiebringe et matesystem for likestrøm som- leverer en forstyrrelsesfri og konstant likestrømeffekt til viktige anlegg som må arbeide uten avbrudd eller andre vanskeligheter. Slike anlegg er blant andre telefonsentraler og anlegg for fjerndrift av kraft-verk. Et annet formål med oppfinnelsen er å tilveiebringe et matesystem hvis konstruksjon er enkel og som er fleksibelt ut vi db art. The purpose of the invention is to provide a feed system for direct current which supplies a disturbance-free and constant direct current power to important installations which must work without interruption or other difficulties. Such facilities include, among others, telephone exchanges and facilities for remote operation of power plants. Another object of the invention is to provide a feeding system whose construction is simple and which is flexible according to art.

Dette oppnås ifølge oppfinnelsen ved at et punkt mellom likeretterenheten og reguleringsenheten- er koplet slik over en halvlederbryter eller lignende med akkumulatorsystemet, at når den absolutte verdi av spenningen i punktet synker under en bestemt verdi sluttes bryteren, hvorved matingen skjer-fra akkumulatorsystemet, og at når spenningen i punktet igjen-øker, bry tes . bry teren, s lik atvanatingen tilbakeføres til nettet. This is achieved according to the invention in that a point between the rectifier unit and the regulation unit is connected in such a way via a semiconductor switch or similar to the accumulator system, that when the absolute value of the voltage at the point drops below a certain value, the switch is closed, whereby the supply takes place-from the accumulator system, and that when the voltage at the point again increases, it breaks. the switch, so that the advanation is returned to the grid.

I og med at bryteren er anordnet foran reguleringsenheten for likestrøm, elimineres behovet for dobbelte re-guleringsanordninger.. Når akkumulatorspenningen synker ved akkumulatorens utladning, endrer denne reguleringsenhet som anvendes ved mating fra nettet slik at spenningen til belastningen hele tiden er av'ønsket størrelse og konstant. Alt As the switch is arranged in front of the regulation unit for direct current, the need for double regulation devices is eliminated. When the accumulator voltage drops when the accumulator is discharged, this regulation unit, which is used when feeding from the mains, changes so that the voltage to the load is always the desired size and constant. Everything

dette leder til en enkel konstruksjon.this leads to a simple construction.

Ytterligere trekk ved oppfinnelsen vil fremgå av kravene 2-4. Further features of the invention will appear from claims 2-4.

Oppfinnelsen skal nedenfor forklares nærmere under henvisning til tegningene. The invention will be explained in more detail below with reference to the drawings.

Fig. 1 viser et blokkskjema for et matesystemFig. 1 shows a block diagram of a feeding system

ifølge oppfinnelsen..according to the invention..

Fig. 2 viser mere detaljert et koplingsskgema forFig. 2 shows in more detail a connection diagram for

en kombinert likeretterenhet ifølge oppfinnelsen.a combined rectifier unit according to the invention.

Fig. 3 viser i blokkskjemaet en annen utførelses-form av et matesystem ifølge oppfinnelsen. Fig. 3 shows in the block diagram another embodiment of a feeding system according to the invention.

Utførelseseksemplet på fig. 1 viser et matesystem for likestrøm som omfatter en kombinert likeretterenhet A The design example in fig. 1 shows a feed system for direct current comprising a combined rectifier unit A

som mates fra et trefaset vekselstrømnett. Likeretterenheten likeretter vekselstrømmen til nivåregulert likestrøm. which is fed from a three-phase alternating current network. The rectifier unit rectifies the alternating current into level-regulated direct current.

På fig. 1 og 2 består enheten A av en likeretterenhet B ogIn fig. 1 and 2, unit A consists of a rectifier unit B and

en reguleringsenhet C for likestrøm. På fig. 2 tutgjøres likeretterenheten B av en trefasetransformator 10. Med-transformatorens stjernekoplede sekundærvikling er koplet en likeretterbro 11. Herved oppnås stor virkningsgrad og stor, konstant effektkoeffisient. a regulation unit C for direct current. In fig. 2, the rectifier unit B is fed by a three-phase transformer 10. The star-connected secondary winding of the co-transformer is connected to a rectifier bridge 11. This achieves a high degree of efficiency and a large, constant power coefficient.

Med likeretterenheten B er koplet en reguleringsenhet C for likestrøm hvis inngang består av en LC-krets (L-^jC^) som hindrer overføring av forstyrrelsesspenninger til belastningen eller akkumulatorsystemet G. LC-kretsen opprettholder dessuten spenningen ved strømbrudd i nettet inntil matingen er overført til akkumulatorsystemet G. Connected to the rectifier unit B is a regulation unit C for direct current whose input consists of an LC circuit (L-^jC^) which prevents the transmission of disturbance voltages to the load or the accumulator system G. The LC circuit also maintains the voltage in the event of a power failure in the network until the supply is transferred to the accumulator system G.

Etter LC-kretsen har enheten C en midtpunktkoplet topp-vekselretter 13. Nødvendig spenning til en tyristorregulert likeretter 15 som styres av en regulerings forsterker 14, leveres av en autotransformator 12 som er koplet med veksel-retteren 13. Med utgangen fra reguleringsenheten C er koplet to LC-filtre L2,L^,C2jC^som fjerner en etter like-rettingen gjenværende vekselspenningskomponent. After the LC circuit, the unit C has a midpoint-coupled peak inverter 13. The required voltage for a thyristor-regulated rectifier 15 which is controlled by a regulation amplifier 14 is supplied by an autotransformer 12 which is connected to the inverter 13. With the output of the regulation unit C is connected two LC filters L2,L^,C2jC^ which remove an alternating voltage component remaining after rectification.

Ifølge oppfinnelsen er et punkt P mellom likeretter enheten B og reguleringsenheten C over en tyristorbryter Kl forbundet med akkumulatorsystemet G. Tyristorbryteren Kl eller.en bryter av tilsvarende type, er innrettet slik at når den absolutte verdi av spenningen i punktet P synker under en bestemt verdi, blir tyristoren ledende slik at bryteren sluttes. Derved skjer matingen fra akkumulatorsystemet G. Når- spenningen i punktet P pånytt øker, sperres tyristoren slik at bryteren Kl brytes og matingen overføres tilbake til nettet . According to the invention, a point P between the rectifier unit B and the regulation unit C is connected via a thyristor switch Kl to the accumulator system G. The thyristor switch Kl or a switch of a similar type is arranged so that when the absolute value of the voltage at point P drops below a certain value , the thyristor becomes conductive so that the switch closes. Thereby, the supply takes place from the accumulator system G. When the voltage at point P increases again, the thyristor is blocked so that the switch Kl is broken and the supply is transferred back to the grid.

På fig. 1 er vist en sentralenhet i form av en blokk D ved hjelp av hvilken akkumulatorsystemet G, belastningen F og ladeenheten E-er koplet med hverandre. Sentralenheten D omfatter en tyristorbryter K2 som automatisk shunter reguleringsenheten for likestrøm hvis feil opptrer i denne. Dessuten har sentralenheten D sikringer H og en strømmateenhet I ved hjelp av hvilken ladningen av akkumulatorsystemet styres. In fig. 1 shows a central unit in the form of a block D by means of which the accumulator system G, the load F and the charging unit E are connected to each other. The central unit D includes a thyristor switch K2 which automatically shunts the regulation unit for direct current if a fault occurs in it. In addition, the central unit D has fuses H and a power supply unit I by means of which the charging of the accumulator system is controlled.

Fig. 3 viser en annen utførelsesform av matesystemet, ifølge oppfinnelsen beregnet på telefonsentraler der det er- behov får både 48 volt og 60 volt likespenning. Matesystemet omfatter bare ett akkumulatorsystem Gl med 31 celler. Fra dette akkumulatorsystem Gl mates likespenning ved strømavbrudd eller forstyrrelser i nettet, til både 60 volt- og 48 volt-anordninger. Til de sistnevnte anordninger skjer matingen via en diodebro 20 som tilveie-bringer det nødvendige spenningstap. Systemet har bare en ladeenhet El. Matesystemet for både 40 volt og 60 volt omfatter flere parallelt kombinerte likeretterenheter A., til Fig. 3 shows another embodiment of the feeding system, according to the invention intended for telephone exchanges where both 48 volt and 60 volt direct voltage is required. The feed system comprises only one accumulator system Gl with 31 cells. From this accumulator system Gl, direct voltage is fed in the event of power cuts or disturbances in the network, to both 60 volt and 48 volt devices. The latter devices are fed via a diode bridge 20 which provides the necessary voltage loss. The system has only one charging unit El. The supply system for both 40 volts and 60 volts comprises several parallel combined rectifier units A., to

A. resp. A„n til A_ . Enhetene A.ntil A. har en felles A. or A„n to A_ . The units A. to A. have a common

An ^ Bl Bn Al AnAn ^ Bl Bn Al An

sentralenhet Dl og enhetene A„ntil A_ har likeså en felles central unit Dl and the units A„ to A_ likewise have one in common

& Bl Bn& Bl Bn

sentralenhet D2. Enhetenes konstruksjon fremgår i detalj av fig.l og 2 med tilhørende beskrivelse. central unit D2. The construction of the units is shown in detail in fig. 1 and 2 with the corresponding description.

Virkemåten for matesystemet på fig. 1 og 2 er følgende. Under normale forhold får belastningen F, f.eks. en telefonsentral, nødvendig likespenning på 48"volt via sentralenheten D fra den kombinerte likeretter A som om-danner den trefasede vekselstrøm fra nettet til likestrøm. The operation of the feed system in fig. 1 and 2 are the following. Under normal conditions, the load F, e.g. a telephone switchboard, required direct voltage of 48" volts via the central unit D from the combined rectifier A which transforms the three-phase alternating current from the mains into direct current.

Ved strømavbrudd i nettet synker den absolutte verdi av spenningen i punktet P hvorved spenningsmatningstrinnet i tyristorbryteren Kl i den kombinerte likeretter A gjør tyristoren ledende slik at matingen skjer fra akkumulatorsystemet G. Under strømavbrudd synker akkumulatorsperiningen. mens utladningen foregår, men reguleringsanordningen C for likestrøm endrer spenningen, slik at spenningen til belastningen F hele tiden er av ønsket størrelse og konstant. Etter strømavbruddet øker den absolutte verdi av spenningen i punktet P og matingen tilbakeføres til nettet hvorved tyristoren Kl sperres. In the event of a power failure in the grid, the absolute value of the voltage at point P drops whereby the voltage supply step in the thyristor switch Kl in the combined rectifier A makes the thyristor conductive so that the supply takes place from the accumulator system G. During a power failure the accumulator voltage drops. while the discharge takes place, but the regulation device C for direct current changes the voltage, so that the voltage to the load F is always of the desired magnitude and constant. After the power cut, the absolute value of the voltage at point P increases and the supply is returned to the grid, whereby the thyristor Kl is blocked.

Konstantsp.enninglikeretteren E er tyristorstyrtThe constant voltage rectifier E is thyristor controlled

og dens utgangsspenning er filtrert. Anordningen anvendes i prinsippet bare- for ladning av akkumulatorsystemet G, and its output voltage is filtered. The device is used in principle only for charging the accumulator system G,

men riktig dimensjonert sikrer den også spenningstilførsel til belastningen hvis feil opptrer i den kombinerte likeretter A. Nivået av utgangsspenningen fra likeretteren G kan velges enten slik aat den er egnet for opprettholdelse av full ladespenning (U2= ca. 55 volt) til akkumulatorene (25 celler) eller slik at den er høyere (U2= ca. 60 volt) for akselerert hurtigladning av utladede akkumulatorer. Styreautomatikken i sentralenheten D sørger for endring av utgangsspenningen til hurtigladningsnivå- etter et strømbrudd i nettet og spenningen opprettholdes på dette nivå inntil akkumulatorene er fulladet. Automatikken registrerer dette og tilbakefører spenningen til nivået for kontinuerlig ladning. Sentralenheten D har som sagt en tyristorbryter K2 hvis oppgave er å shunte reguleringsdelen i den kombinerte likeretter hvis feil opptrer i denne. but properly dimensioned it also ensures voltage supply to the load if a fault occurs in the combined rectifier A. The level of the output voltage from the rectifier G can be chosen either so that it is suitable for maintaining full charging voltage (U2= approx. 55 volts) to the accumulators (25 cells) ) or so that it is higher (U2= approx. 60 volts) for accelerated fast charging of discharged accumulators. The automatic control in the central unit D ensures that the output voltage is changed to the fast charging level after a power failure in the mains and the voltage is maintained at this level until the accumulators are fully charged. The automation registers this and returns the voltage to the level for continuous charging. As mentioned, the central unit D has a thyristor switch K2 whose task is to shunt the regulation part in the combined rectifier if a fault occurs in this.

Selv om det av beskrivelsen ovenfor fremgår at det som hensiktsmessig bryter anvendes en tyristorbryter Kl- er det naturligvis også mulig i stedet .å anvende en annen type bryter til dette formål. Dessuten kan oppfinnelsen også arbeide med store strømmer ved å la den ovenfor beskrevne tyristorbryter Kl styre en kontaktor som således funksjo-nerer som den.egentlige■bryter. Although it is clear from the above description that a thyristor switch Kl is used as an appropriate switch, it is of course also possible to use another type of switch for this purpose instead. Moreover, the invention can also work with large currents by having the above-described thyristor switch K1 control a contactor which thus functions as the actual switch.

Claims (4)

1. Matesystem for likestrøm som omfatter en med et vekselstrømnett koplet likeretterenhet (B) og en med denne koplet reguleringsenhet (C) for likestrøm,- og som er koplet med en belastning (F) og med et akkumulatorsystem (G) fra hvilket matingen av belastningen skjer-ved strømavbrudd i nettet og/eller ved feil i systemet, karakterisert ved at et punkt (P) mellom likeretterenheten og reguleringsenheten er koplet slik over en halvlederbryter (Kl) eller lignende med akkumulatorsystemet, at når den absolutte verdi av spenningen- i punktet (P) synker under en bestemt verdi i sluttes bryteren, hvorved matingen skjer fra akkumulatorsystemet, og at når spenningen i punktet igjen øker brytes bryteren, slik at matingen tilbakeføres til nettet.1. Feeding system for direct current which comprises a rectifier unit (B) connected to an alternating current network and a regulating unit (C) connected to this, and which is connected to a load (F) and to an accumulator system (G) from which the feeding of the load occurs - in the event of a power cut in the network and/or in the event of a fault in the system, characterized by the fact that a point (P) between the rectifier unit and the regulation unit is connected in such a way via a semiconductor switch (Kl) or similar with the accumulator system, that when the absolute value of the voltage - in the point (P) drops below a certain value in the switch is closed, whereby the supply takes place from the accumulator system, and that when the voltage at the point increases again, the switch is broken, so that the supply is returned to the grid. 2. System ifølge krav 1, karakterisert ved at bryteren (Kl) er en tyristor som gjøres ledende eller sperres ved minskning resp. økning av den absolutte verdi av spenningen i punktet (P).2. System according to claim 1, characterized in that the switch (Kl) is a thyristor which is made conductive or blocked by reduction or increase of the absolute value of the voltage at the point (P). 3- System ifølge krav 1 eller 2, karakterisert ved at halvlederbryteren (Kl) styrer en kontaktor som tjener som den egentlige bryter.3- System according to claim 1 or 2, characterized in that the semiconductor switch (Kl) controls a contactor which serves as the actual switch. 4. System ifølge et av de foregående krav, karakterisert ved at likeretterenheten (B), reguleringsenheten. (C) og bryteren (Kl) tilsammen danner en enhet (A) som over en.Isentralenhet (D) er koplet med belastningen (F) og akkumulatorsystemet (G), at en ladeenhet (E) for akkumulatorsystemet er koplet med sentralenheten, og at sentralenheten har en tyristorbryter (K2) eller lignende som shunter reguleringsenheten når feil opptrer i denne.4. System according to one of the preceding claims, characterized in that the rectifier unit (B), the regulation unit. (C) and the switch (Kl) together form a unit (A) which above a central unit (D) is connected to the load (F) and the accumulator system (G), that a charging unit (E) for the accumulator system is connected to the central unit, and that the central unit has a thyristor switch (K2) or similar that shunts the control unit when errors occur in it.
NO770786A 1976-03-09 1977-03-07 POWER DEVICE FOR DC POWER. NO770786L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI760600A FI760600A (en) 1976-03-09 1976-03-09

Publications (1)

Publication Number Publication Date
NO770786L true NO770786L (en) 1977-09-12

Family

ID=8509812

Family Applications (1)

Application Number Title Priority Date Filing Date
NO770786A NO770786L (en) 1976-03-09 1977-03-07 POWER DEVICE FOR DC POWER.

Country Status (3)

Country Link
FI (1) FI760600A (en)
NO (1) NO770786L (en)
SE (1) SE7702644L (en)

Also Published As

Publication number Publication date
SE7702644L (en) 1977-09-10
FI760600A (en) 1977-09-10

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