EP0111794A1 - Dispositif pour l'alimentation en tension d'un électrofiltre - Google Patents

Dispositif pour l'alimentation en tension d'un électrofiltre Download PDF

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Publication number
EP0111794A1
EP0111794A1 EP83112096A EP83112096A EP0111794A1 EP 0111794 A1 EP0111794 A1 EP 0111794A1 EP 83112096 A EP83112096 A EP 83112096A EP 83112096 A EP83112096 A EP 83112096A EP 0111794 A1 EP0111794 A1 EP 0111794A1
Authority
EP
European Patent Office
Prior art keywords
voltage
thyristor
filter
pulse
diode
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.)
Granted
Application number
EP83112096A
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German (de)
English (en)
Other versions
EP0111794B1 (fr
Inventor
Franz Neulinger
Gerhard Dönig
Helmut Schummer
Walter Schmidt
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.)
GEA Group AG
Siemens AG
Original Assignee
Metallgesellschaft AG
Siemens 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 Metallgesellschaft AG, Siemens AG filed Critical Metallgesellschaft AG
Priority to AT83112096T priority Critical patent/ATE18514T1/de
Publication of EP0111794A1 publication Critical patent/EP0111794A1/fr
Application granted granted Critical
Publication of EP0111794B1 publication Critical patent/EP0111794B1/fr
Expired legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/34—Constructional details or accessories or operation thereof
    • B03C3/66—Applications of electricity supply techniques
    • B03C3/68—Control systems therefor
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S323/00—Electricity: power supply or regulation systems
    • Y10S323/903—Precipitators

Definitions

  • the invention relates to a device according to the preamble of the main claim.
  • electrostatic precipitators are operated today with high DC voltage, which is generated by rectification from an AC voltage network (see e.g. Siemens magazine 1971, number 9, pp. 567 - 572). It is known to superimpose further voltage pulses on this dc voltage, which can be regulated as a function of filter short circuits (cf. e.g. DE-OS 26 08 436 or 30 27 172).
  • pulse voltage sources for supplying the pulse voltage are already known, in which an antiparallel connection of thyristor and diode is connected to a direct voltage source.
  • the thyristor is fired, the resonant circuit formed by the separator in connection with the pulse voltage source is triggered each time (see e.g. DE-OS 26 08 436).
  • the flashover usually occurs at the maximum or shortly after the maximum of the filter voltage, ie in the period in which the diode carries the pulse current. Due to the short circuit, the oscillation stops immediately, ie the diode blocks. This means that the full voltage is immediately back on the anti-parallel connected thyristor. Is the time between the deletion of the thyristor through the zero crossing of the Stro mes and takeover of the current through the diode very low, ie less than the free time of the thyristor, the thyristor can ignite by the recurring voltage even without an ignition pulse. Since this ignition takes place relatively slowly, the thyristor is subjected to a very high thermal load during this time and may be destroyed.
  • the object of the present invention is to ensure in a device of the type mentioned that the thyristor or possibly a series and / or parallel connection of thyristors is not damaged in the event of a breakdown or short circuit in the electrostatic filter. This object is achieved in accordance with the characterizing features of the main claim. In this way, the power loss occurring in the thyristor is limited.
  • An electrostatic filter 5 is fed in a manner known per se from a high-voltage rectifier device 6 which is connected to the network RS.
  • a control device 7 is provided, which is not the subject of the invention and is described in more detail, for example, in the aforementioned reference "Siemens magazine".
  • a pulse voltage source which consists of the rectifier 1 fed from a three-phase network RST with optionally controllable semiconductor valves 11, a parallel-connected backup capacitor 12, a circuit arrangement 2 with an antiparallel-connected thyristor 22 and diode 21 and a pulse transformer 3 with primary winding 31 and secondary winding 32.
  • the pulse voltage Up which can be removed from the secondary winding 32, is fed to the electrostatic filter 5 via a coupling capacitor 4 and is connected to the filter 5 together with the direct voltage Ug 1 coming from the high-voltage rectifier device.
  • An ignition circuit 21 is assigned to the thyristor 22 and supplies ignition pulses to the thyristor 22 at periodic intervals, for example at a periodic interval Tp of 2 ms.
  • the series resonant circuit consisting of the pulse voltage source, ie the components 12, 31, 32, coupling capacitor 4 and electrostatic filter 5, is triggered.
  • the primary current denoted by i l in FIG. 3 flows through the primary winding 31 and induces the pulse voltage denoted Up in the secondary winding 32.
  • the superimposition of the pulse voltage Up and the high DC voltage U gl then results overall in the voltage profile shown in FIG. 2 on the electrostatic filter, the individual pulses, for example, having a voltage duration of 200 ⁇ s.
  • the vibration in the primary circuit runs in normal operation in such a way that after the thyristor 22 is ignited next this thyristor carries the current designated i T until after the zero crossing the current is taken over by the diode 21. Through this diode then the current i D, which forms the second part of the oscillation of the primary current 1 1 flows. If the diode current i D goes through zero again, the oscillation is ended until the oscillation circuit is triggered again by an ignition pulse at the thyristor 22.
  • FIG. 1 The conditions in the event of a short circuit are shown in FIG. As can be seen, the voltage Up collapses at time t k as a result of a flashover and becomes zero. The diode also blocks due to the flashover, so that the diode current i D also goes to zero and the oscillation ceases. The result of this is that the full DC voltage is immediately present again at thyristor 22. If the time in which the diode current flows is greater than the free time of the thyristor 22, it no longer ignites. The situation is different when the time t x until the diode current i D disappears is less than the required free time t of the thyristor 22.
  • the thyristor 22 would fire again, even without an ignition pulse. However, this process would take a relatively long time, so that the thyristor is thermally overloaded.
  • the time period t x is therefore monitored in which the diode current i D , ie the second half-wave of the primary current, flows. If this time t x is less than the release time t q of the thyristor 22, it is immediately ignited again by an ignition pulse so that it can again take over the current. Since the DC voltage at the electrostatic filter was also reduced to zero as a result of the short circuit, this additional voltage pulse has no major effect.
  • the diode current in is recorded for the purpose of monitoring.
  • This becomes a Rectangular signal generated in a flip-flop 82, whose width t corresponds to the distance between the zero crossings of the current i D.
  • This signal triggers a monostable multivibrator 83 which toggles back within a time which corresponds approximately to the release time t q of the thyristor 22.
  • the output signal of this flip-flop together with the output signal of flip-flop 82 are applied to a logic circuit 84 in which a comparison is made as to whether the signal corresponding to the current flow duration t x is greater or less than the free time t set in the monostable flip-flop 83.
  • a logic circuit 84 responds and outputs a set signal to a memory 85 .
  • This memory gives an immediate command to the ignition circuit 21 via line 86 to ignite the thyristor 22 and then blocks the delivery of further ignition pulses by the ignition circuit 21 for a time dependent on the filter operating values.
  • the renewed release of the ignition circuit 21 can be done, for example, That is, when the DC voltage at the filter has reached a certain level again through the regulation 7, the memory 85 is implemented and the ignition circuit 21 is thereby released.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
  • Power Conversion In General (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Surgical Instruments (AREA)
  • Rectifiers (AREA)
EP83112096A 1982-12-13 1983-12-01 Dispositif pour l'alimentation en tension d'un électrofiltre Expired EP0111794B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83112096T ATE18514T1 (de) 1982-12-13 1983-12-01 Einrichtung zur spannungsversorgung eines elektrofilters.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3246057 1982-12-13
DE19823246057 DE3246057A1 (de) 1982-12-13 1982-12-13 Einrichtung zur spannungsversorgung eines elektrofilters

Publications (2)

Publication Number Publication Date
EP0111794A1 true EP0111794A1 (fr) 1984-06-27
EP0111794B1 EP0111794B1 (fr) 1986-03-12

Family

ID=6180508

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83112096A Expired EP0111794B1 (fr) 1982-12-13 1983-12-01 Dispositif pour l'alimentation en tension d'un électrofiltre

Country Status (5)

Country Link
US (1) US4873620A (fr)
EP (1) EP0111794B1 (fr)
JP (1) JPS59115758A (fr)
AT (1) ATE18514T1 (fr)
DE (2) DE3246057A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197369A1 (fr) * 1985-03-29 1986-10-15 Metallgesellschaft Ag Procédé et dispositif pour alimenter en impulsions haute tension un filtre électrostatique

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2561453B2 (ja) * 1983-02-07 1996-12-11 住友重機械工業株式会社 電気集塵機用パルス電源
DE3640092A1 (de) * 1986-11-24 1988-06-01 Metallgesellschaft Ag Verfahren und einrichtung zur energieversorgung eines elektroabscheiders
WO1991015297A1 (fr) * 1990-04-04 1991-10-17 Siemens Aktiengesellschaft Procede de regulation du dispositif d'alimentation en courant d'un filtre electrique
US5542967A (en) * 1994-10-06 1996-08-06 Ponizovsky; Lazar Z. High voltage electrical apparatus for removing ecologically noxious substances from gases
US6063168A (en) * 1997-08-11 2000-05-16 Southern Company Services Electrostatic precipitator
JP4627165B2 (ja) * 2004-09-02 2011-02-09 三菱電機株式会社 電力用半導体装置の制御用回路および制御用集積回路
PT1652586E (pt) * 2004-10-26 2011-09-12 Smidth As F L Sistema de geração de impulsos para precipitador eletrostático
US20070156051A1 (en) * 2005-12-29 2007-07-05 Amit Pascal Device and method for in-vivo illumination
US10734257B2 (en) * 2012-04-25 2020-08-04 Applied Materials, Inc. Direct current lamp driver for substrate processing
PL3154702T3 (pl) * 2014-06-13 2021-12-13 Flsmidth A/S Sterowanie zasilaczem wysokonapięciowym elektrofiltra
EP3612310B1 (fr) * 2017-10-09 2020-09-30 Kraftpowercon Sweden AB Système d'alimentation électrique à haute tension

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1923952A1 (de) * 1969-05-10 1970-11-19 Licentia Gmbh Regelverfahren beim elektrostatischen Abscheiden von Aerosol mit einem Elektrofilter,insbesondere fuer Abgasentstaubung
FR2302788A1 (fr) * 1975-03-03 1976-10-01 Lindberg As Nea Agencement formant precipitateur electrostatique
EP0044488A1 (fr) * 1980-07-17 1982-01-27 Metallgesellschaft Ag Procédé et dispositif pour le fonctionnement d'un électrofiltre alimenté par tension continue variable en amplitude et impulsions superposées
EP0071285A1 (fr) * 1981-07-23 1983-02-09 Hollandse Signaalapparaten B.V. Convertisseur d'énergie

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4831015B1 (fr) * 1969-01-08 1973-09-26
SE364826B (fr) * 1972-07-10 1974-03-04 Asea Ab
JPS51116663A (en) * 1975-04-07 1976-10-14 Hitachi Ltd Gate control unit for thyrister valve
DE2713675C2 (de) * 1977-03-28 1984-08-23 Siemens AG, 1000 Berlin und 8000 München Stromversorgung für einen Elektroabscheider
JPS55141982A (en) * 1979-04-24 1980-11-06 Toshiba Corp Gate circuit for thyristor converter
SE446418B (sv) * 1980-07-07 1986-09-08 Asea Ab Aterhemtningsskydd for en tyristorventil med ett flertal seriekopplade tyristorer

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1923952A1 (de) * 1969-05-10 1970-11-19 Licentia Gmbh Regelverfahren beim elektrostatischen Abscheiden von Aerosol mit einem Elektrofilter,insbesondere fuer Abgasentstaubung
FR2302788A1 (fr) * 1975-03-03 1976-10-01 Lindberg As Nea Agencement formant precipitateur electrostatique
EP0044488A1 (fr) * 1980-07-17 1982-01-27 Metallgesellschaft Ag Procédé et dispositif pour le fonctionnement d'un électrofiltre alimenté par tension continue variable en amplitude et impulsions superposées
EP0071285A1 (fr) * 1981-07-23 1983-02-09 Hollandse Signaalapparaten B.V. Convertisseur d'énergie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SIEMENS-ZEITSCHRIFT, Band 45, Heft 9, September 1971, ERLANGEN (DE), *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0197369A1 (fr) * 1985-03-29 1986-10-15 Metallgesellschaft Ag Procédé et dispositif pour alimenter en impulsions haute tension un filtre électrostatique

Also Published As

Publication number Publication date
EP0111794B1 (fr) 1986-03-12
DE3246057A1 (de) 1984-06-14
DE3362565D1 (en) 1986-04-17
ATE18514T1 (de) 1986-03-15
JPS59115758A (ja) 1984-07-04
JPS6110181B2 (fr) 1986-03-28
US4873620A (en) 1989-10-10

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