EP0569815B1 - Système d'évaluation pour un filtre électrostatique - Google Patents

Système d'évaluation pour un filtre électrostatique Download PDF

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Publication number
EP0569815B1
EP0569815B1 EP19930107164 EP93107164A EP0569815B1 EP 0569815 B1 EP0569815 B1 EP 0569815B1 EP 19930107164 EP19930107164 EP 19930107164 EP 93107164 A EP93107164 A EP 93107164A EP 0569815 B1 EP0569815 B1 EP 0569815B1
Authority
EP
European Patent Office
Prior art keywords
lines
power supply
transformer
voltage
conversion device
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.)
Expired - Lifetime
Application number
EP19930107164
Other languages
German (de)
English (en)
Other versions
EP0569815A1 (fr
Inventor
Norbert Dipl.-Ing. Grass
Gerhard Dipl.-Ing. Dönig
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.)
Siemens AG
Original Assignee
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 Siemens AG filed Critical Siemens AG
Publication of EP0569815A1 publication Critical patent/EP0569815A1/fr
Application granted granted Critical
Publication of EP0569815B1 publication Critical patent/EP0569815B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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

Definitions

  • the invention relates to an arrangement for data acquisition and transmission in an electrostatic filter which is supplied with electrical energy via a high-voltage transformer.
  • the plugs can consist, for example, of a Schuko plug for the energy supply and a Sub-D plug or a BNC plug for the data line.
  • a common connector is used, which can be plugged in only in one position, for example due to its symmetry properties.
  • the data lines and the power supply lines are designed to be non-interchangeable, the lines cannot be confused with one another even without a plug.
  • the data lines can be designed, for example, as a ribbon cable or as a coaxial cable, while a conventional copper cable is used for the energy supply.
  • optical fibers can also be used as data lines. It has turned out that, contrary to the expectations of experts, optical fibers can withstand the mechanical loads in rough industrial operation if they are coated accordingly. If the data lines are designed as optical fibers, there is galvanic decoupling and thus potential isolation between the control cabinet and the transformer cabinet. As a result, it cannot happen that the measured value detection device is destroyed by a potential jump, such as occurs, for example, in the event of a filter breakdown. This results in higher operational reliability.
  • the data lines and the power supply lines are preferably routed in a common cable.
  • the mechanical load on the optical fibers is significantly reduced. This ensures that the data lines are not interrupted abruptly.
  • Additional lines e.g. to monitor the transformer temperature.
  • the high-voltage transformer is arranged in the transformer cabinet 1.
  • the secondary winding 2 of the high-voltage transformer is shown in FIG.
  • the output voltage of the secondary winding 2 is applied to the electrostatic filter (not shown) via the rectifier unit 4.
  • An output of the rectifier unit 4 is connected to earth via the series resistor 3.
  • the other output of the rectifier unit 4 is also connected to earth via the shunts 5, 6.
  • the signals tapped via lines 7, 8 are proportional to the filter current and the filter voltage.
  • the lines 7, 8 are fed to the conversion device 9.
  • the conversion device 9 internally has a voltage-controlled oscillator (VCO) which converts the small analog signals fed into frequency signals. These frequency signals are then used to drive two light-emitting diodes (not shown). The light signals are fed into the optical fibers 10, which are guided in the cable 11 to the control cabinet 12.
  • VCO voltage-controlled oscillator
  • a computing unit 13 is arranged in the control cabinet 12.
  • the computing unit 13 has, inter alia, a demodulator 14, which receives the light signals of the lines 10 and converts them into digital signals.
  • the digital values for filter current and filter voltage thus available in the computer 13 can then be processed further in the computer 13, for example for controlling the power supply device of the electrostatic filter, which is also not shown.
  • the computer 13 controls, inter alia, a display 15, by means of which the filter current and the filter voltage are displayed.
  • a power supply device 16 is also arranged in the control cabinet 12 and serves to supply power to the conversion device 9.
  • the power supply device 16 supplies the mains voltage of 220 volts.
  • the power supply device 16 consists of two connection terminals.
  • the mains voltage is fed to the conversion device 9 via the lines 17, which are also guided in the cable 11.
  • the voltage is then transformed down to typically 15 volts and rectified.
  • the cable 11 is fastened in the cabinets 1, 12 by means of cable clips, not shown.
  • the individual lines run from there to the data connections 18 and the energy supply connections 19.
  • the data connections 18 and the energy supply connections 19 are designed in a manner known per se.
  • the data lines 10 and the energy supply lines 17 can be distinguished at a glance and are therefore practically unmistakable. Furthermore, even if the power supply lines 17 are incorrectly connected to the data connection ends or vice versa, no contact is made. The energy supply lines 17 can therefore only be coupled to the energy supply connections 19. Likewise, the data lines 10 can only be coupled to the data connection ends.
  • the cable 11 has further lines 20 in addition to the data lines 10 and the power supply lines 17. These lines 20 are used to transmit further information from the transformer cabinet 1 to the control cabinet 12, for example the information about the transformer temperature.
  • the further lines 20 and their connection in the cabinets 1 and 12 were not shown in FIG. 1 for the sake of clarity. Because of the sheath 21 of the common cable 11, the optical waveguides 10 in particular are essentially not exposed to any mechanical loads.
  • optical fibers are used for data transmission, the detected current or voltage signals must be modulated. This compulsion requirement has also prevented the use of optical fibers for signal transmission because of the costs involved.
  • the overall combination of converting device 9, optical waveguides 10 and converting device 14 used is less expensive than previously known solutions. There are no longer any need for converters from 10 volts to 20 mA. Furthermore, in contrast to the past, only the secondary values have to be recorded, no longer the primary and secondary values.
  • the detected values are converted into frequency signals.
  • the frequency with which the LEDs are modulated is always different from zero. If the signal received by the demodulator 14 is no longer modulated, but rather uniform, this information can be used to detect an optical fiber break or another malfunction.

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)

Claims (3)

  1. Dispositif pour la détection de valeurs de mesure et pour leur transmission pour un électrofiltre, qui est alimenté en électricité par l'intermédiaire d'un transformateur (2) haute tension, ayant les caractéristiques suivantes :
    a) un dispositif (3, 5, 6) de détection de valeurs de mesure pour une tension et un courant du côté haute tension et comportant un dispositif (9) de conversion branché en aval est monté, conjointement avec un transformateur (2) haute tension, dans une armoire (1) de transformateur,
    b) des lignes (10) de transmission de données sous forme de guides d'ondes lumineuses, par l'intermédiaire desquelles les valeurs de mesure modulées du courant et de la tension sont transmises à un dispositif (13) de traitement de valeurs de mesure, s'étendent du dispositif de conversion dans l'armoire (1) de transformateur à une armoire (12) de commande séparée,
    c) le dispositif (9) de conversion est alimenté en électricité par des lignes (17) d'alimentation en énergie s'étendant de l'armoire (12) de commande à l'armoire (1) de transformateur,
    d) lesdits guides (10) d'ondes lumineuses et les lignes (17) d'alimentation en énergie passent dans un câble commun.
  2. Dispositif suivant la revendication 1, dans lequel les lignes (10) de transmission de données et les lignes (17) d'alimentation en énergie sont de forme telle qu'elles ne peuvent être confondues.
  3. Dispositif suivant la revendication 1, dans lequel les lignes (10) de transmission de données et les lignes d'alimentation en énergie sont munies de fiches préfabriquées.
EP19930107164 1992-05-14 1993-05-03 Système d'évaluation pour un filtre électrostatique Expired - Lifetime EP0569815B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9206555U 1992-05-14
DE9206555U DE9206555U1 (fr) 1992-05-14 1992-05-14

Publications (2)

Publication Number Publication Date
EP0569815A1 EP0569815A1 (fr) 1993-11-18
EP0569815B1 true EP0569815B1 (fr) 1997-08-20

Family

ID=6879515

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930107164 Expired - Lifetime EP0569815B1 (fr) 1992-05-14 1993-05-03 Système d'évaluation pour un filtre électrostatique

Country Status (3)

Country Link
EP (1) EP0569815B1 (fr)
DE (2) DE9206555U1 (fr)
DK (1) DK0569815T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004036210B4 (de) * 2004-07-26 2006-08-31 Siemens Ag Steuereinrichtung sowie Steuerverfahren für Elektrofilter mit einer konfigurierbaren Anzahl paralleler und serieller Filterzonen

Also Published As

Publication number Publication date
DE9206555U1 (fr) 1992-07-02
DK0569815T3 (da) 1998-04-06
DE59307144D1 (de) 1997-09-25
EP0569815A1 (fr) 1993-11-18

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