EP0197369B1 - Verfahren und Einrichtung zur Versorgung eines Elektroabscheiders mit Hochspannungsimpulsen - Google Patents

Verfahren und Einrichtung zur Versorgung eines Elektroabscheiders mit Hochspannungsimpulsen Download PDF

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Publication number
EP0197369B1
EP0197369B1 EP86103602A EP86103602A EP0197369B1 EP 0197369 B1 EP0197369 B1 EP 0197369B1 EP 86103602 A EP86103602 A EP 86103602A EP 86103602 A EP86103602 A EP 86103602A EP 0197369 B1 EP0197369 B1 EP 0197369B1
Authority
EP
European Patent Office
Prior art keywords
voltage
voltage transformer
transformer
primary winding
thyristor
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
Application number
EP86103602A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0197369A1 (de
Inventor
Richard Dipl.-Ing. Dallhammer
Gerhard Dipl.-Ing. Dönig
Hartmut Dipl.-Ing. Gaul
Walter Dipl.-Ing. Schmidt
Franz Dipl.-Ing. Neulinger
Helmut Dipl.-Ing. Schummer
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 AT86103602T priority Critical patent/ATE48547T1/de
Publication of EP0197369A1 publication Critical patent/EP0197369A1/de
Application granted granted Critical
Publication of EP0197369B1 publication Critical patent/EP0197369B1/de
Expired 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
    • 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 method for supplying an electrical separator with high-voltage pulses, which are generated by excitation of a high-voltage transformer coupled on the secondary side to the electrical separator with the aid of direct voltage. Furthermore, the invention relates to a device for supplying an electrical separator with high-voltage pulses, in which the primary winding of a high-voltage transformer coupled on the secondary side to the electrical separator can be excited from a direct-voltage source via a direct-current regulator that can be controlled by a first control unit.
  • the high-voltage pulses are generally generated by energizing the primary winding of a high-voltage transformer which is coupled on the secondary side to the electrical separator.
  • Such devices are known for example from DE-OS 32 46 057.
  • the object of the present invention is therefore to provide a generic method, which ensure a consistently high quality of the transmission of the high-voltage pulses.
  • the advantage of the disclosed solution resides in the cyclical feedback of the magnetization of the high-voltage transformer and in the resulting undiminished transmission of the high-voltage pulses to the electrical separator.
  • the device shown in Fig. 1 for supplying an electric separator A draws its energy from a three-phase network with phases R, S, T. Via controllable rectifiers G1 to G6, a variable voltage DC voltage is generated at the capacitor C1 and by the first control unit S1 Controlled firing of the thyristor T1 to the primary winding W1 of the high-voltage transformer H, whereby a high-voltage pulse is induced in the secondary winding W2. This reaches the electrical separator A via a coupling capacitance C2 and is superimposed on the direct voltage DC present there via a resistor R2, so that additional charge carriers are generated in the electrical separator A without the formation of an arc.
  • the diode G7 conducts currents oscillating back from the electrical separator A via the high-voltage transformer H to the capacitance C1 and in this respect serves in a known manner for energy recovery and also for protection of the longitudinal thyristor T1.
  • Other conventional protective measures (series connection of several thyristors, monitoring of the release time, protective ignition, current limitation by chokes, etc.) are also possible for the thyristor T1, but are not shown in detail.
  • the ignition frequency specified by the first control unit S1 to the thyristor T1 depends on the operating parameters of the electrostatic precipitator A, such as the type of dust, the dust loading, the desired degree of dust separation or the DC voltage DC.
  • FIGS. 2 and 3 where the voltage u 'and the current i' of the electrostatic precipitator A are shown in the event that the proposed demagnetization of the high-voltage transformer H is not yet used (for the measurement, the source of the DC voltage DC is not connected to the electrical separator A or the resistor R2).
  • the thyristor T1 is ignited by the first control unit S1 and the primary winding W1 of the high-voltage transformer H excited.
  • the high-voltage pulse thus induced in the secondary winding W2 of the high-voltage transformer H charges the capacitive-acting electrical separator A to the voltage value ü up to the time t2.
  • the flooding of the core of the high-voltage transformer H between times t2 and t3 is not exactly the same as the flooding between times t1 and t2 (see FIG. 3: i2 ⁇ i1). Therefore, even when using magnetically soft core materials, residual magnetization of the core of the high-voltage transformer H remains after transmission of the pulse and increases with each subsequent pulse until the core material is magnetically saturated and further pulses are no longer or only insufficiently transmitted.
  • This primary-side short-circuit completes the discharge process of the electrodepositor A via the magnetically coupled series resonant circuit W2, C2 up to the point in time t5, so that the successive opposite flows through the core are approximately the same and thus have an effect on the remanent magnetization of the high-voltage transformer Neutralize H.
  • the time t4 at which the control unit S2 ignites the thyristor T2 can be as close as desired to the time t3 at which the discharge current becomes zero. 4 and 5, there is a clear margin between these times only for drawing reasons.
  • the thyristor T2 could even immediately after the time t2, d. H. after the return of the thyristor T1 in the blocking state, are fired to support the discharge process. Then, however, the part of the energy which oscillates back, which is otherwise charged back to the capacitor C1 between the times t2 and t3, would be destroyed by the short-circuit of the primary winding caused by thyristor T2 and resistor R1.
  • connection shown in Fig. 1 between the first control unit S1 and the second control unit S2 is used to synchronize the control unit S2 with respect to the control unit S1 in order, for. B. to rule out untimely ignitions of the thyristor T2 or - with a given pulse width - to operate a pure timing control of S2.
  • a permanent counter-flooding of the high-voltage transformer H in can support the demagnetization be provided in a manner known per se such that a tertiary winding W3 applied to its core is supplied by a direct current which is oriented in the opposite direction to the primary excitation and which, for. B. can be obtained in a conventional manner from the AC network (see low voltage transformer N, rectifier G9 to G12, capacitance C3).
  • control units S1 and S2 need not necessarily be in the form of separate systems; their combination into a central control unit is useful in many practical cases.
  • the avoidance of the magnetic saturation of the high-voltage transformer H leads to an effective transmission of pulses from the primary side of the high-voltage transformer H to the secondary side and thus to the electrical separator A.
  • the transmission of pulses from the secondary side to the primary side is possible undiminished, so that in particular in the event of short-circuits in the electrical separator A, especially in the event of arcing between the electrodes, voltage surges can occur on the primary side of the high-voltage transformer H, which must be kept away from the longitudinal thyristor T1.
  • the short-circuiting of the primary winding W1 can also be considered for this purpose.
  • the thyristor T3 is z. B. via the current limiting resistor R1 parallel to the primary winding W1. If their voltage exceeds a critical value, the breakdown diode BOD becomes conductive and ignites the thyristor T3 via the resistor R3 and the diode G8, so that the voltage on the primary winding W1 breaks down.
  • the current flowing through thyristor T3 is oriented in the opposite direction to the current that thyristor T2 has to carry cyclically.
  • the functions of the thyristors T2 and T3 can thus be combined in a single controllable semiconductor switching element if it is bidirectionally conductive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Electrostatic Separation (AREA)
  • Apparatus For Radiation Diagnosis (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Generation Of Surge Voltage And Current (AREA)
EP86103602A 1985-03-29 1986-03-17 Verfahren und Einrichtung zur Versorgung eines Elektroabscheiders mit Hochspannungsimpulsen Expired EP0197369B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86103602T ATE48547T1 (de) 1985-03-29 1986-03-17 Verfahren und einrichtung zur versorgung eines elektroabscheiders mit hochspannungsimpulsen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853511622 DE3511622A1 (de) 1985-03-29 1985-03-29 Verfahren und einrichtung zur versorgung eines elektroabscheiders mit hochspannungsimpulsen
DE3511622 1985-03-29

Publications (2)

Publication Number Publication Date
EP0197369A1 EP0197369A1 (de) 1986-10-15
EP0197369B1 true EP0197369B1 (de) 1989-12-13

Family

ID=6266827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86103602A Expired EP0197369B1 (de) 1985-03-29 1986-03-17 Verfahren und Einrichtung zur Versorgung eines Elektroabscheiders mit Hochspannungsimpulsen

Country Status (7)

Country Link
US (1) US4670829A (ja)
EP (1) EP0197369B1 (ja)
JP (1) JPS61230758A (ja)
AT (1) ATE48547T1 (ja)
AU (1) AU573433B2 (ja)
DE (2) DE3511622A1 (ja)
ZA (1) ZA862313B (ja)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991015297A1 (de) * 1990-04-04 1991-10-17 Siemens Aktiengesellschaft Regelverfahren für die stromversorgungseinrichtung eines elektrofilters
JPH07232102A (ja) * 1993-12-28 1995-09-05 Mitsubishi Heavy Ind Ltd 電気集塵装置
US5542967A (en) * 1994-10-06 1996-08-06 Ponizovsky; Lazar Z. High voltage electrical apparatus for removing ecologically noxious substances from gases
US5689177A (en) * 1996-01-11 1997-11-18 The Babcock & Wilcox Company Method and apparatus to regulate a voltage controller
US6063168A (en) * 1997-08-11 2000-05-16 Southern Company Services Electrostatic precipitator
US6874224B2 (en) * 2002-06-21 2005-04-05 Waukesha Electric Systems, Inc. Method for manufacturing a multi-site spare three-phase transformer
KR100462275B1 (ko) * 2002-07-18 2004-12-17 두산중공업 주식회사 전기집진기용 인버터의 스위칭 타임 설정 회로와 그 방법
EP2397227A1 (en) * 2010-06-18 2011-12-21 Alstom Technology Ltd Method to control the line distortion of a system of power supplies of electrostatic precipitators
CN105080723B (zh) * 2014-05-07 2018-02-13 浙江佳环电子有限公司 一种大功率高压脉冲产生电路
PL3154702T3 (pl) * 2014-06-13 2021-12-13 Flsmidth A/S Sterowanie zasilaczem wysokonapięciowym elektrofiltra
EP3612310B1 (en) * 2017-10-09 2020-09-30 Kraftpowercon Sweden AB High-voltage power supply system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2162988C3 (de) * 1970-12-23 1975-09-25 International Standard Electric Corp., New York, N.Y. (V.St.A.) Stellglied für einen Wechselspannungsregler
US4061961A (en) * 1976-07-02 1977-12-06 United Air Specialists, Inc. Circuit for controlling the duty cycle of an electrostatic precipitator power supply
US4441146A (en) * 1982-02-04 1984-04-03 Vicor Corporation Optimal resetting of the transformer's core in single ended forward converters
DE3241060A1 (de) * 1982-11-06 1984-05-10 Buckau-Walther AG, 4048 Grevenbroich Elektrische schaltung fuer einen elektrostatisch arbeitenden staubabscheider
DE3246057A1 (de) * 1982-12-13 1984-06-14 Metallgesellschaft Ag, 6000 Frankfurt Einrichtung zur spannungsversorgung eines elektrofilters
DE3308411C2 (de) * 1983-03-09 1987-01-29 Siemens AG, 1000 Berlin und 8000 München Spannungsversorgung für einen Elektroabscheider

Also Published As

Publication number Publication date
ATE48547T1 (de) 1989-12-15
EP0197369A1 (de) 1986-10-15
ZA862313B (en) 1986-11-26
US4670829A (en) 1987-06-02
DE3667411D1 (de) 1990-01-18
JPS61230758A (ja) 1986-10-15
AU573433B2 (en) 1988-06-09
AU5531686A (en) 1986-10-02
DE3511622A1 (de) 1986-10-09

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