EP0452431A1 - Procede et dispositif de regulation et commande de tensions alternatives a partir du reseau distributeur public - Google Patents

Procede et dispositif de regulation et commande de tensions alternatives a partir du reseau distributeur public

Info

Publication number
EP0452431A1
EP0452431A1 EP19900914048 EP90914048A EP0452431A1 EP 0452431 A1 EP0452431 A1 EP 0452431A1 EP 19900914048 EP19900914048 EP 19900914048 EP 90914048 A EP90914048 A EP 90914048A EP 0452431 A1 EP0452431 A1 EP 0452431A1
Authority
EP
European Patent Office
Prior art keywords
voltage
switching elements
input voltage
voltages
width modulation
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.)
Withdrawn
Application number
EP19900914048
Other languages
German (de)
English (en)
Inventor
Werner Meier-Darvasi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CONTROLUX AG
Original Assignee
CONTROLUX AG
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 CONTROLUX AG filed Critical CONTROLUX AG
Publication of EP0452431A1 publication Critical patent/EP0452431A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/275—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M5/293—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only

Definitions

  • the present invention relates to a method and a device for electronically regulating and controlling AC voltages.
  • the AC voltages in question are those that are common in public power supply networks.
  • the typical frequency in Europe is 50 Hz, in the U.S.A. and other countries, for example 60 Hz.
  • frequencies around 400 Hz are used.
  • the invention relates to an AC voltage control, which, depending on the design, can be used between a voltage frequency of zero and up to 10 kHz.
  • the order of magnitude of the mains voltage in public networks is always at a nominal voltage value between zero and 500 V. ..
  • the AC voltage for current consumers is mainly regulated by phase angle controls, by inverter circuits or by means of vibration packet controls.
  • the voltage is regulated by cutting off a certain part of the phase, which causes a point of discontinuity in the voltage curve. This will induces many harmonics or harmonics that can be derived from the Fourier transformations.
  • Electrical stor consumers regulated in this way to the Neüz therefore have undesirable network perturbations which have a negative effect on the quality of the power supply network.
  • the AC voltage sine curve of the power supply network is superimposed by these, in some cases high-frequency harmonics or harmonics, and to a certain extent contaminated.
  • phase control Another side effect of the phase control is the reactive current, which is withdrawn from the network depending on the phase angle between the current and the voltage. This electricity places an unnecessary strain on the energy distribution network and must therefore be kept within limits. Above certain limits, therefore, elaborate reactive current compensation systems with audio frequency locks used. These are essentially capacitors and decoupling inductors connected in parallel, by means of which the reactive power is brought to almost zero. In addition, reactive power meters are also installed so that the purchased reactive power can be offset.
  • a second known type of AC voltage regulation takes place by means of a so-called Variacs with an optional servomotor.
  • This is an electromechanical device. It allows only a low adjustment speed and has been displaced today for reasons of price and space. It is only used for laboratory purposes.
  • inverter Another option for regulating AC voltages is the inverter.
  • This is a device that first generates a DC voltage, i.e. processes the AC voltage using a rectifier-capacitor circuit, and then uses an inverter to generate a controllable single-phase or three-phase AC voltage with a controllable frequency.
  • Such inverters primarily produce harmonics due to their rectifier-capacitor circuit, which in turn must then be eliminated from certain limits by means of specially designed suction circuits. Inverters are also relatively expensive in terms of material prices.
  • electronic AC voltage switches should also be mentioned. There are some circuits that allow an AC voltage to be switched with the aid of a Grai rectifier and a transistor. However, such an AC voltage switch has so far only been used as a replacement for a relay switch.
  • the object of the present invention is therefore to create a method and a device for regulating and controlling alternating voltages from the public distribution network, which solves the problems mentioned at the beginning.
  • the method according to the invention and the device for exercising it should enable AC voltage regulation and control, which eliminates the drawing of reactive power from the network and avoids the occurrence of harmonics.
  • This object is achieved by a method for regulating and controlling AC voltages from the public distribution network, in which the input voltage is regulated by means of pulse width modulation and subsequent filtering directly into an AC output voltage which lies within the envelope of the AC input voltage.
  • the device for performing the method is characterized in that at least two AC switching elements are present between the terminals of the input voltage, between which the output voltage is tapped, these switching elements being able to be activated alternately for pulse width modulation.
  • the device and the method operate with little loss. No harmonic harmonics are generated and no additional reactive power is drawn. For specific loads (for example fluorescent tube systems), a partial harmonic compensation of the load is even possible by a special choice of the output curve shape (by means of modulation).
  • the voltage regulation according to the invention can be used quite generally for regulating AC voltage, in particular also as a voltage stabilizer and as Three-phase voltage regulator. It is suitable, for example, for light control, for controlling motors, and as a soft start control. For the user, their advantages lie in saving energy costs by, for example, a hardly noticeable reduction in the intensity of light in the case of fluorescent tubes. Furthermore, an extended service life of the starting devices and fluorescent tubes due to a reduction in the operating voltage can be expected. In addition, no suction circuits are required for the suppression of harmonics. Furthermore, no additional reactive current compensation systems are required, which means that smaller bundle current compensation systems can be used in comparison to devices with phase-angle control.
  • the voltage regulation according to the invention if used to a greater extent, helps to save energy, to optimize the network utilization and to maintain a network that is free of flow with respect to harmonics.
  • Figure 1 A schematic diagram of the inventive device
  • Figure 2 The AC voltage switch from Figure 1 in its interior structure
  • FIG. 3 another construction of an AC voltage switch with Grford rectifiers.
  • FIG. 1 The basic structure of the device according to the invention is shown in FIG. Following the input filter 1, a bidirectional switchover element 2 is arranged between the terminals of the input voltage.
  • the basis of the operation of the device is a direct pulse width modulation of the alternating voltage with specially connected fast alternating voltage switching elements in the inside of the switching element 2.
  • a power switch is thus formed which is suitable for the regulation of any loads from zero to approx. 50 kW / kVA .
  • the core of the device consists of the switching element 2, which can process both positive and negative input voltages U. That is, alternating voltages as well as direct voltages of any polarity.
  • FIG. 2 shows the basic circuit of the changeover element 2 or the power changeover switch 2 on the basis of a detailed and enlarged view compared to FIG. It includes two AC voltage switching elements 4, 5, between which the terminals for the output voltage U are connected, these switching elements 4, 5 being alternately activatable for pulse width modulation.
  • the AC voltage switching elements 4, 5 consist here of an anti-serial connection of two power semiconductors .., T 7 and T 3 , T. each with a diode D 1 , D 2 and D 3 , D 4 connected antiparallel to them. If one considers one half of the switching element 2, or the upper switching element 4, and the first power semiconductor T. is switched on, the current flows through this first power semiconductor T- when the input voltage U.
  • the diodes D - D. can both components of the power semiconductor 1 ⁇ -T. (Power Mos Fet or IGET), but can also be external, i.e. discrete, as shown.
  • the course of the modulated AC voltage U. is shown schematically in Figure 1.
  • a certain proportional output voltage U t of the same curve shape can be generated, the value of the voltage naturally always running inside the envelope of the input voltage U. If modulation is only carried out over half a period and the pulse widths are varied, the output voltage U t can have any curve shape. This application is primarily of interest for the compensation of any harmonics that occur, that is, if a load exhibits a non-linear behavior.
  • FIG 3 shows an alternative device which can also be used for the same purpose.
  • the AC voltage switching elements 4, 5 therefore each include a Griger rectifier circuit D 5 and D g , the AC voltage inputs of which form the connections of the AC voltage switching elements 4, 5 and a power semiconductor between their DC voltage outputs -Element T 5 or T g is connected.
  • the two AC voltage switching elements 4, 5, whether for a circuit according to FIG. 2 or according to FIG. 3, are particularly advantageously formed by industrially manufactured hybrid modules.
  • the invention makes it possible to achieve a largely sinusoidal power-current curve by regulating the AC voltage accordingly by pulse width modulation.
  • the method and the device can be operated in the range between zero and up to 10 kHz.
  • the voltage can take any course within the envelope of the input voltage U- n , depending on the variation of the pulse widths and pulse pauses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Ac-Ac Conversion (AREA)

Abstract

Le procédé traite la tension d'entrée (Uin) au moyen d'une modulation d'impulsion en largeur suivie d'une filtration, de sorte qu'une tension alternative de sortie, (Uout) se situant dans l'enveloppante de la tension alternative d'entrée, est réglable directement. Le dispositif d'application du procédé comprend au moins deux éléments de circuit de tension alternative (4, 5), connectés entre les bornes de la tension d'entrée (Uin). La tension de sortie (Uout) est prélevée entre les éléments de circuit (4, 5) de tension alternative, de ce fait ces éléments de circuit peuvent être activés alternativement pour une modulation d'impulsion en largeur.
EP19900914048 1989-10-04 1990-10-01 Procede et dispositif de regulation et commande de tensions alternatives a partir du reseau distributeur public Withdrawn EP0452431A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3634/89 1989-10-04
CH3634/89A CH679704A5 (fr) 1989-10-04 1989-10-04

Publications (1)

Publication Number Publication Date
EP0452431A1 true EP0452431A1 (fr) 1991-10-23

Family

ID=4260200

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900914048 Withdrawn EP0452431A1 (fr) 1989-10-04 1990-10-01 Procede et dispositif de regulation et commande de tensions alternatives a partir du reseau distributeur public

Country Status (5)

Country Link
EP (1) EP0452431A1 (fr)
AU (1) AU6433590A (fr)
CA (1) CA2042589A1 (fr)
CH (1) CH679704A5 (fr)
WO (1) WO1991005401A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2267788B (en) * 1992-06-04 1997-01-29 Strand Lighting Ltd Dimming system, and dimmer therefor
DE4428682C2 (de) * 1994-08-12 1997-01-23 Robert Seuffer Gmbh & Co Verfahren zur Versorgung einer induktiven Last mit sinusförmigem Wechselstrom und Wechselstromsteller hierfür
DK1067671T3 (da) * 1999-07-02 2003-03-31 Magnetek Spa Strømforsyningskredsløb til en elektrisk motor og tilhørende styrefremgangsmåde
EP1604440B1 (fr) 2003-03-14 2016-06-15 ABB Technology AG Coupe-circuit electronique

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3354350A (en) * 1964-10-27 1967-11-21 Ohio Crankshaft Co Two alternate conducting multivibrators powered by ac source
US4742441A (en) * 1986-11-21 1988-05-03 Heart Interface Corporation High frequency switching power converter
US5455491A (en) * 1987-10-14 1995-10-03 Patricia Bailey Power saving circuitry

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9105401A1 *

Also Published As

Publication number Publication date
AU6433590A (en) 1991-04-28
CH679704A5 (fr) 1992-03-31
CA2042589A1 (fr) 1991-04-05
WO1991005401A1 (fr) 1991-04-18

Similar Documents

Publication Publication Date Title
DE68922049T2 (de) Pulsbreiten-modulierte Leistungsversorgung mit Unterdrückungsfähigkeit von Modulierungsfrequenzsignalkomponenten von Erdpotentialen.
EP2391522B1 (fr) Convertisseur cc/cc et convertisseur ca/cc
DE69506612T2 (de) Steuerschaltung für induktive Belastung
DE4208114C2 (de) Steuereinrichtung für einen bidirektionalen pulsbreitenmodulierten Stromrichter
DE69111986T2 (de) Einphasige Leistungswandlereinrichtung.
DE112013006680T5 (de) Dreiphasen-Spannungs-Umsetzungsvorrichtung
DE112012003766B4 (de) Energie-Umwandlungsvorrichtung
DE60120664T2 (de) Pwm-frequenzwandler
EP2375552A1 (fr) Procédé pour commander un onduleur
EP1892811A2 (fr) Circuit convertisseur de puissance et procédé d'alimentation de réseau à partir d'une source de tension continue non constant
DE102017212462A1 (de) Galvanisch gekoppelter elektrischer Wandler
WO2021160791A1 (fr) Détermination de paramètres de filtre dans un onduleur
EP3504781A1 (fr) Régulation d'un courant de sortie d'un convertisseur de puissance
DE3525413A1 (de) Elektromagnetischer stroemungsmesser
EP3826159B1 (fr) Dispositif de traitement régulé du circuit intermédiaire efficace indépendamment du type de réseau
EP0452431A1 (fr) Procede et dispositif de regulation et commande de tensions alternatives a partir du reseau distributeur public
WO2013023914A1 (fr) Dispositif onduleur
DE19603823A1 (de) Stromrichterschaltungsanordnung, insbesondere zur Energieaufbereitung in Photovoltaik- oder mindestens einphasigen Systemen
CH688066A5 (de) Wechselstrom/Gleichstrom-Wandler nach dem Buck-/Boost-Prinzip.
DE29622825U1 (de) Bestrahlungsgerät
EP1524576A1 (fr) Convertisseur de tension survolteur avec régulation de facteur de puissance
DE19729705A1 (de) Schaltungsanordnung zum Speisen einer Last
EP0446383B1 (fr) Alimentation à découpage absorbant un courant sinusoidal et évitant les surtensions de courant
DE69205476T2 (de) Verfahren und Vorrichtung zum Dämpfen des Funkstörungseffektes auf Leitern im mehrphasigen Wechselstromnetz.
DE10044574A1 (de) Schaltungsanordnung zum variablen Steuern von Wechselstromverbrauchern

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19910909

17Q First examination report despatched

Effective date: 19930419

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19930831